./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe024_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe024_tso.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/safe024_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe024_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:59:04,966 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:59:05,029 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:59:05,033 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:59:05,034 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:59:05,057 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:59:05,058 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:59:05,058 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:59:05,059 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:59:05,062 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:59:05,062 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:59:05,062 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:59:05,063 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:59:05,064 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:59:05,064 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:59:05,065 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:59:05,065 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:59:05,065 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:59:05,065 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:59:05,065 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:59:05,066 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:59:05,067 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:59:05,067 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:59:05,067 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:59:05,067 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:59:05,068 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:59:05,068 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:59:05,068 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:59:05,069 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:59:05,069 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:59:05,070 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:59:05,070 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:59:05,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:59:05,070 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:59:05,071 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:59:05,071 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:59:05,071 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:59:05,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:59:05,072 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:59:05,072 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:59:05,072 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:59:05,072 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:59:05,072 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:59:05,073 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 00:59:05,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:59:05,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:59:05,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:59:05,326 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:59:05,326 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:59:05,327 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe024_tso.yml/witness.yml [2024-06-28 00:59:05,481 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:59:05,482 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:59:05,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe024_tso.i [2024-06-28 00:59:06,456 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:59:06,665 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:59:06,665 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe024_tso.i [2024-06-28 00:59:06,677 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3cb2d0fa/fe6d35a245f54d87b7b9ac489fa5e4c1/FLAG69a5176dd [2024-06-28 00:59:06,687 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3cb2d0fa/fe6d35a245f54d87b7b9ac489fa5e4c1 [2024-06-28 00:59:06,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:59:06,689 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:59:06,689 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:59:06,690 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:59:06,693 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:59:06,694 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:59:05" (1/2) ... [2024-06-28 00:59:06,695 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a591515 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:59:06, skipping insertion in model container [2024-06-28 00:59:06,695 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:59:05" (1/2) ... [2024-06-28 00:59:06,696 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4625132e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:59:06, skipping insertion in model container [2024-06-28 00:59:06,696 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:59:06" (2/2) ... [2024-06-28 00:59:06,696 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a591515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:06, skipping insertion in model container [2024-06-28 00:59:06,697 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:59:06" (2/2) ... [2024-06-28 00:59:06,697 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:59:06,733 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:59:06,734 INFO L97 edCorrectnessWitness]: Location invariant before [L788-L788] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 00:59:06,734 INFO L97 edCorrectnessWitness]: Location invariant before [L787-L787] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 00:59:06,734 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((((((0 <= __unbuffered_cnt && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 00:59:06,734 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:59:06,735 INFO L106 edCorrectnessWitness]: ghost_update [L783-L783] multithreaded = 1; [2024-06-28 00:59:06,772 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:59:06,906 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/safe024_tso.i[945,958] [2024-06-28 00:59:07,042 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:59:07,049 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 00:59:07,077 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/safe024_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:59:07,133 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:59:07,165 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:59:07,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:07 WrapperNode [2024-06-28 00:59:07,166 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:59:07,168 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:59:07,168 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:59:07,168 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:59:07,173 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:07" (1/1) ... [2024-06-28 00:59:07,186 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:07" (1/1) ... [2024-06-28 00:59:07,219 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2024-06-28 00:59:07,220 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:59:07,221 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:59:07,221 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:59:07,221 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:59:07,229 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:07" (1/1) ... [2024-06-28 00:59:07,229 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:07" (1/1) ... [2024-06-28 00:59:07,241 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:07" (1/1) ... [2024-06-28 00:59:07,255 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 00:59:07,262 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:07" (1/1) ... [2024-06-28 00:59:07,262 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:07" (1/1) ... [2024-06-28 00:59:07,266 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:07" (1/1) ... [2024-06-28 00:59:07,273 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:07" (1/1) ... [2024-06-28 00:59:07,274 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:07" (1/1) ... [2024-06-28 00:59:07,282 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:07" (1/1) ... [2024-06-28 00:59:07,284 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:59:07,285 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:59:07,285 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:59:07,285 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:59:07,285 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:07" (1/1) ... [2024-06-28 00:59:07,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:59:07,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:59:07,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 00:59:07,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 00:59:07,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:59:07,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:59:07,355 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:59:07,355 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:59:07,355 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:59:07,355 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:59:07,355 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:59:07,356 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:59:07,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:59:07,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:59:07,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:59:07,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:59:07,358 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:59:07,476 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:59:07,478 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:59:07,644 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:59:07,644 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:59:07,734 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:59:07,735 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:59:07,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:59:07 BoogieIcfgContainer [2024-06-28 00:59:07,735 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:59:07,737 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:59:07,737 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:59:07,745 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:59:07,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:59:05" (1/4) ... [2024-06-28 00:59:07,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d39a9a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:59:07, skipping insertion in model container [2024-06-28 00:59:07,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:59:06" (2/4) ... [2024-06-28 00:59:07,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d39a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:59:07, skipping insertion in model container [2024-06-28 00:59:07,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:59:07" (3/4) ... [2024-06-28 00:59:07,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d39a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:59:07, skipping insertion in model container [2024-06-28 00:59:07,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:59:07" (4/4) ... [2024-06-28 00:59:07,747 INFO L112 eAbstractionObserver]: Analyzing ICFG safe024_tso.i [2024-06-28 00:59:07,760 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:59:07,760 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 00:59:07,760 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:59:07,797 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:59:07,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-06-28 00:59:07,842 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-06-28 00:59:07,842 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:59:07,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-06-28 00:59:07,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-06-28 00:59:07,847 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-06-28 00:59:07,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:59:07,864 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;@501ce8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:59:07,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 00:59:07,872 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:59:07,873 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:59:07,873 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:59:07,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:07,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:59:07,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:07,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:07,879 INFO L85 PathProgramCache]: Analyzing trace with hash 211854220, now seen corresponding path program 1 times [2024-06-28 00:59:07,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:07,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907412062] [2024-06-28 00:59:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:07,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:08,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:08,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907412062] [2024-06-28 00:59:08,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907412062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:08,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:08,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:59:08,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895871519] [2024-06-28 00:59:08,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:08,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:59:08,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:08,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:59:08,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:59:08,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2024-06-28 00:59:08,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:08,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:08,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2024-06-28 00:59:08,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:08,638 INFO L124 PetriNetUnfolderBase]: 736/1198 cut-off events. [2024-06-28 00:59:08,638 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-28 00:59:08,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2383 conditions, 1198 events. 736/1198 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6270 event pairs, 397 based on Foata normal form. 1/1144 useless extension candidates. Maximal degree in co-relation 2371. Up to 1120 conditions per place. [2024-06-28 00:59:08,651 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 31 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-06-28 00:59:08,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 189 flow [2024-06-28 00:59:08,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:59:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:59:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-28 00:59:08,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7318840579710145 [2024-06-28 00:59:08,662 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 101 transitions. [2024-06-28 00:59:08,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 189 flow [2024-06-28 00:59:08,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:08,691 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-06-28 00:59:08,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-28 00:59:08,695 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-06-28 00:59:08,695 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-06-28 00:59:08,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:08,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:08,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:08,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:59:08,697 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:08,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:08,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1729120605, now seen corresponding path program 1 times [2024-06-28 00:59:08,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:08,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684968357] [2024-06-28 00:59:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:08,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:08,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:08,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684968357] [2024-06-28 00:59:08,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684968357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:08,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:08,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:59:08,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430316165] [2024-06-28 00:59:08,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:08,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:59:08,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:08,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:59:08,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:59:08,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-28 00:59:08,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:08,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:08,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-28 00:59:08,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:09,116 INFO L124 PetriNetUnfolderBase]: 962/1584 cut-off events. [2024-06-28 00:59:09,117 INFO L125 PetriNetUnfolderBase]: For 320/354 co-relation queries the response was YES. [2024-06-28 00:59:09,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3527 conditions, 1584 events. 962/1584 cut-off events. For 320/354 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8792 event pairs, 491 based on Foata normal form. 3/1544 useless extension candidates. Maximal degree in co-relation 3515. Up to 1423 conditions per place. [2024-06-28 00:59:09,125 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 44 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2024-06-28 00:59:09,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 282 flow [2024-06-28 00:59:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:59:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:59:09,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-28 00:59:09,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7119565217391305 [2024-06-28 00:59:09,128 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 131 transitions. [2024-06-28 00:59:09,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 282 flow [2024-06-28 00:59:09,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:59:09,130 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 168 flow [2024-06-28 00:59:09,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-28 00:59:09,131 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2024-06-28 00:59:09,131 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 168 flow [2024-06-28 00:59:09,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:09,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:09,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:09,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:59:09,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:09,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:09,133 INFO L85 PathProgramCache]: Analyzing trace with hash -95411809, now seen corresponding path program 1 times [2024-06-28 00:59:09,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:09,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696228759] [2024-06-28 00:59:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:09,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:09,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:09,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696228759] [2024-06-28 00:59:09,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696228759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:09,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:09,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:59:09,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937645346] [2024-06-28 00:59:09,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:09,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:59:09,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:09,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:59:09,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:59:09,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-06-28 00:59:09,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:09,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:09,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-06-28 00:59:09,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:09,496 INFO L124 PetriNetUnfolderBase]: 982/1597 cut-off events. [2024-06-28 00:59:09,497 INFO L125 PetriNetUnfolderBase]: For 781/875 co-relation queries the response was YES. [2024-06-28 00:59:09,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3981 conditions, 1597 events. 982/1597 cut-off events. For 781/875 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8911 event pairs, 466 based on Foata normal form. 2/1530 useless extension candidates. Maximal degree in co-relation 3966. Up to 1460 conditions per place. [2024-06-28 00:59:09,505 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 40 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-06-28 00:59:09,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 312 flow [2024-06-28 00:59:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:59:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:59:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-28 00:59:09,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6902173913043478 [2024-06-28 00:59:09,507 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 168 flow. Second operand 4 states and 127 transitions. [2024-06-28 00:59:09,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 312 flow [2024-06-28 00:59:09,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 310 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-28 00:59:09,509 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 209 flow [2024-06-28 00:59:09,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-06-28 00:59:09,510 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-06-28 00:59:09,510 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 209 flow [2024-06-28 00:59:09,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:09,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:09,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:09,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:59:09,511 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:09,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:09,511 INFO L85 PathProgramCache]: Analyzing trace with hash -716173719, now seen corresponding path program 1 times [2024-06-28 00:59:09,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:09,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537615022] [2024-06-28 00:59:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:09,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:09,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:09,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537615022] [2024-06-28 00:59:09,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537615022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:09,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:09,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:09,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120646017] [2024-06-28 00:59:09,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:09,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:09,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:09,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:09,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:09,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:09,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 209 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-28 00:59:09,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:09,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:09,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:09,947 INFO L124 PetriNetUnfolderBase]: 1214/1961 cut-off events. [2024-06-28 00:59:09,947 INFO L125 PetriNetUnfolderBase]: For 1617/1627 co-relation queries the response was YES. [2024-06-28 00:59:09,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5328 conditions, 1961 events. 1214/1961 cut-off events. For 1617/1627 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10877 event pairs, 309 based on Foata normal form. 12/1952 useless extension candidates. Maximal degree in co-relation 5310. Up to 1730 conditions per place. [2024-06-28 00:59:09,959 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 63 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2024-06-28 00:59:09,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 457 flow [2024-06-28 00:59:09,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-28 00:59:09,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-06-28 00:59:09,963 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 209 flow. Second operand 6 states and 186 transitions. [2024-06-28 00:59:09,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 457 flow [2024-06-28 00:59:09,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 90 transitions, 440 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 00:59:09,967 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 249 flow [2024-06-28 00:59:09,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=249, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-28 00:59:09,968 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2024-06-28 00:59:09,968 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 249 flow [2024-06-28 00:59:09,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 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) [2024-06-28 00:59:09,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:09,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:09,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:59:09,969 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:09,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1337202354, now seen corresponding path program 1 times [2024-06-28 00:59:09,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:09,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355925883] [2024-06-28 00:59:09,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:09,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:10,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:10,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355925883] [2024-06-28 00:59:10,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355925883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:10,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:10,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:59:10,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655364325] [2024-06-28 00:59:10,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:10,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:59:10,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:10,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:59:10,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:59:10,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:10,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2024-06-28 00:59:10,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:10,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:10,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:10,366 INFO L124 PetriNetUnfolderBase]: 1279/2116 cut-off events. [2024-06-28 00:59:10,366 INFO L125 PetriNetUnfolderBase]: For 2769/2789 co-relation queries the response was YES. [2024-06-28 00:59:10,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6130 conditions, 2116 events. 1279/2116 cut-off events. For 2769/2789 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12263 event pairs, 451 based on Foata normal form. 2/2085 useless extension candidates. Maximal degree in co-relation 6110. Up to 1843 conditions per place. [2024-06-28 00:59:10,379 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 57 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-28 00:59:10,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 477 flow [2024-06-28 00:59:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:59:10,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:59:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-28 00:59:10,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565217391304348 [2024-06-28 00:59:10,381 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 249 flow. Second operand 5 states and 151 transitions. [2024-06-28 00:59:10,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 477 flow [2024-06-28 00:59:10,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 448 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:10,389 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 314 flow [2024-06-28 00:59:10,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-28 00:59:10,391 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-06-28 00:59:10,392 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 314 flow [2024-06-28 00:59:10,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2024-06-28 00:59:10,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:10,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:10,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:59:10,393 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:10,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:10,393 INFO L85 PathProgramCache]: Analyzing trace with hash 357849314, now seen corresponding path program 1 times [2024-06-28 00:59:10,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:10,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830921563] [2024-06-28 00:59:10,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:10,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:10,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:10,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830921563] [2024-06-28 00:59:10,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830921563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:10,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:10,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:59:10,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722658300] [2024-06-28 00:59:10,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:10,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:59:10,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:10,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:59:10,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:59:10,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:10,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 314 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2024-06-28 00:59:10,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:10,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:10,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:10,791 INFO L124 PetriNetUnfolderBase]: 1397/2271 cut-off events. [2024-06-28 00:59:10,791 INFO L125 PetriNetUnfolderBase]: For 3549/3578 co-relation queries the response was YES. [2024-06-28 00:59:10,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7028 conditions, 2271 events. 1397/2271 cut-off events. For 3549/3578 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12875 event pairs, 433 based on Foata normal form. 26/2280 useless extension candidates. Maximal degree in co-relation 7005. Up to 1983 conditions per place. [2024-06-28 00:59:10,806 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 64 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2024-06-28 00:59:10,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 100 transitions, 606 flow [2024-06-28 00:59:10,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:59:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:59:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-28 00:59:10,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6869565217391305 [2024-06-28 00:59:10,808 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 314 flow. Second operand 5 states and 158 transitions. [2024-06-28 00:59:10,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 100 transitions, 606 flow [2024-06-28 00:59:10,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 100 transitions, 602 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 00:59:10,814 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 419 flow [2024-06-28 00:59:10,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=419, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-28 00:59:10,815 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2024-06-28 00:59:10,815 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 419 flow [2024-06-28 00:59:10,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2024-06-28 00:59:10,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:10,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:10,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:59:10,816 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:10,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:10,816 INFO L85 PathProgramCache]: Analyzing trace with hash 400495394, now seen corresponding path program 2 times [2024-06-28 00:59:10,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:10,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609315465] [2024-06-28 00:59:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:10,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:10,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:10,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609315465] [2024-06-28 00:59:10,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609315465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:10,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:10,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:59:10,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187247438] [2024-06-28 00:59:10,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:10,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:59:10,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:10,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:59:10,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:59:10,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:10,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 419 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2024-06-28 00:59:10,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:10,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:10,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:11,165 INFO L124 PetriNetUnfolderBase]: 1460/2425 cut-off events. [2024-06-28 00:59:11,165 INFO L125 PetriNetUnfolderBase]: For 5197/5216 co-relation queries the response was YES. [2024-06-28 00:59:11,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8102 conditions, 2425 events. 1460/2425 cut-off events. For 5197/5216 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14103 event pairs, 459 based on Foata normal form. 14/2425 useless extension candidates. Maximal degree in co-relation 8075. Up to 2070 conditions per place. [2024-06-28 00:59:11,215 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 59 selfloop transitions, 18 changer transitions 0/95 dead transitions. [2024-06-28 00:59:11,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 623 flow [2024-06-28 00:59:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:59:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:59:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-28 00:59:11,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6652173913043479 [2024-06-28 00:59:11,217 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 419 flow. Second operand 5 states and 153 transitions. [2024-06-28 00:59:11,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 623 flow [2024-06-28 00:59:11,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 95 transitions, 603 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-28 00:59:11,225 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 444 flow [2024-06-28 00:59:11,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=444, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2024-06-28 00:59:11,225 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2024-06-28 00:59:11,226 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 444 flow [2024-06-28 00:59:11,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2024-06-28 00:59:11,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:11,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:11,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:59:11,226 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:11,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:11,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1739026701, now seen corresponding path program 1 times [2024-06-28 00:59:11,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:11,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508040603] [2024-06-28 00:59:11,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:11,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:11,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:11,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508040603] [2024-06-28 00:59:11,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508040603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:11,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:11,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:11,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023695931] [2024-06-28 00:59:11,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:11,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:11,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:11,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:11,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:11,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:11,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 444 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 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) [2024-06-28 00:59:11,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:11,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:11,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:11,598 INFO L124 PetriNetUnfolderBase]: 1529/2452 cut-off events. [2024-06-28 00:59:11,599 INFO L125 PetriNetUnfolderBase]: For 5704/5707 co-relation queries the response was YES. [2024-06-28 00:59:11,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8245 conditions, 2452 events. 1529/2452 cut-off events. For 5704/5707 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13813 event pairs, 487 based on Foata normal form. 2/2448 useless extension candidates. Maximal degree in co-relation 8215. Up to 2147 conditions per place. [2024-06-28 00:59:11,620 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 85 selfloop transitions, 20 changer transitions 0/119 dead transitions. [2024-06-28 00:59:11,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 119 transitions, 836 flow [2024-06-28 00:59:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-28 00:59:11,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-28 00:59:11,623 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 444 flow. Second operand 6 states and 183 transitions. [2024-06-28 00:59:11,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 119 transitions, 836 flow [2024-06-28 00:59:11,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 119 transitions, 780 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:11,633 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 538 flow [2024-06-28 00:59:11,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=538, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-28 00:59:11,635 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2024-06-28 00:59:11,635 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 538 flow [2024-06-28 00:59:11,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 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) [2024-06-28 00:59:11,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:11,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:11,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:59:11,636 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:11,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:11,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1283011793, now seen corresponding path program 2 times [2024-06-28 00:59:11,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:11,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928266190] [2024-06-28 00:59:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:11,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:11,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:11,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928266190] [2024-06-28 00:59:11,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928266190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:11,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:11,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:11,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878360534] [2024-06-28 00:59:11,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:11,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:11,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:11,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:11,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:11,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:11,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 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) [2024-06-28 00:59:11,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:11,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:11,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:12,008 INFO L124 PetriNetUnfolderBase]: 1546/2554 cut-off events. [2024-06-28 00:59:12,008 INFO L125 PetriNetUnfolderBase]: For 7131/7131 co-relation queries the response was YES. [2024-06-28 00:59:12,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8964 conditions, 2554 events. 1546/2554 cut-off events. For 7131/7131 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14878 event pairs, 704 based on Foata normal form. 2/2528 useless extension candidates. Maximal degree in co-relation 8932. Up to 2165 conditions per place. [2024-06-28 00:59:12,024 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 81 selfloop transitions, 26 changer transitions 0/121 dead transitions. [2024-06-28 00:59:12,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 892 flow [2024-06-28 00:59:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 00:59:12,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-28 00:59:12,026 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 538 flow. Second operand 6 states and 179 transitions. [2024-06-28 00:59:12,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 892 flow [2024-06-28 00:59:12,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 121 transitions, 858 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-28 00:59:12,037 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 616 flow [2024-06-28 00:59:12,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=616, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2024-06-28 00:59:12,038 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 36 predicate places. [2024-06-28 00:59:12,038 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 616 flow [2024-06-28 00:59:12,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 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) [2024-06-28 00:59:12,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:12,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:12,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:59:12,039 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:12,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:12,042 INFO L85 PathProgramCache]: Analyzing trace with hash 856001267, now seen corresponding path program 3 times [2024-06-28 00:59:12,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:12,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808096826] [2024-06-28 00:59:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:12,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:12,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:12,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808096826] [2024-06-28 00:59:12,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808096826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:12,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:12,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:12,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699350454] [2024-06-28 00:59:12,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:12,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:12,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:12,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:12,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:12,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:12,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 616 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 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) [2024-06-28 00:59:12,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:12,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:12,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:12,413 INFO L124 PetriNetUnfolderBase]: 1541/2529 cut-off events. [2024-06-28 00:59:12,413 INFO L125 PetriNetUnfolderBase]: For 8162/8162 co-relation queries the response was YES. [2024-06-28 00:59:12,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9073 conditions, 2529 events. 1541/2529 cut-off events. For 8162/8162 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14575 event pairs, 518 based on Foata normal form. 2/2522 useless extension candidates. Maximal degree in co-relation 9039. Up to 2160 conditions per place. [2024-06-28 00:59:12,428 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 80 selfloop transitions, 25 changer transitions 0/119 dead transitions. [2024-06-28 00:59:12,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 119 transitions, 890 flow [2024-06-28 00:59:12,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-28 00:59:12,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-28 00:59:12,429 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 616 flow. Second operand 6 states and 178 transitions. [2024-06-28 00:59:12,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 119 transitions, 890 flow [2024-06-28 00:59:12,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 862 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 00:59:12,441 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 646 flow [2024-06-28 00:59:12,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=646, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2024-06-28 00:59:12,442 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2024-06-28 00:59:12,442 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 646 flow [2024-06-28 00:59:12,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 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) [2024-06-28 00:59:12,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:12,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:12,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:59:12,443 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:12,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:12,443 INFO L85 PathProgramCache]: Analyzing trace with hash 856278097, now seen corresponding path program 1 times [2024-06-28 00:59:12,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:12,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219623105] [2024-06-28 00:59:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:12,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:12,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:12,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219623105] [2024-06-28 00:59:12,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219623105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:12,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:12,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:12,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59952379] [2024-06-28 00:59:12,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:12,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:12,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:12,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:12,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:12,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:12,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 646 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:12,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:12,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:12,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:12,819 INFO L124 PetriNetUnfolderBase]: 1388/2297 cut-off events. [2024-06-28 00:59:12,820 INFO L125 PetriNetUnfolderBase]: For 9681/9681 co-relation queries the response was YES. [2024-06-28 00:59:12,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8587 conditions, 2297 events. 1388/2297 cut-off events. For 9681/9681 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13241 event pairs, 402 based on Foata normal form. 4/2273 useless extension candidates. Maximal degree in co-relation 8551. Up to 1951 conditions per place. [2024-06-28 00:59:12,836 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 88 selfloop transitions, 12 changer transitions 0/122 dead transitions. [2024-06-28 00:59:12,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 122 transitions, 924 flow [2024-06-28 00:59:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 00:59:12,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-28 00:59:12,838 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 646 flow. Second operand 6 states and 179 transitions. [2024-06-28 00:59:12,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 122 transitions, 924 flow [2024-06-28 00:59:12,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 122 transitions, 874 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:12,853 INFO L231 Difference]: Finished difference. Result has 93 places, 94 transitions, 643 flow [2024-06-28 00:59:12,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=643, PETRI_PLACES=93, PETRI_TRANSITIONS=94} [2024-06-28 00:59:12,853 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2024-06-28 00:59:12,854 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 94 transitions, 643 flow [2024-06-28 00:59:12,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:12,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:12,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:12,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:59:12,854 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:12,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:12,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1349821219, now seen corresponding path program 1 times [2024-06-28 00:59:12,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:12,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594545099] [2024-06-28 00:59:12,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:12,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:12,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:12,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594545099] [2024-06-28 00:59:12,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594545099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:12,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:12,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:12,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888037794] [2024-06-28 00:59:12,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:12,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:12,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:12,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:12,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:13,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:13,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 94 transitions, 643 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:13,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:13,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:13,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:13,261 INFO L124 PetriNetUnfolderBase]: 1453/2482 cut-off events. [2024-06-28 00:59:13,261 INFO L125 PetriNetUnfolderBase]: For 11733/11763 co-relation queries the response was YES. [2024-06-28 00:59:13,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9264 conditions, 2482 events. 1453/2482 cut-off events. For 11733/11763 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14546 event pairs, 460 based on Foata normal form. 25/2439 useless extension candidates. Maximal degree in co-relation 9227. Up to 2031 conditions per place. [2024-06-28 00:59:13,276 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 88 selfloop transitions, 17 changer transitions 0/130 dead transitions. [2024-06-28 00:59:13,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 130 transitions, 951 flow [2024-06-28 00:59:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-28 00:59:13,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702898550724637 [2024-06-28 00:59:13,277 INFO L175 Difference]: Start difference. First operand has 93 places, 94 transitions, 643 flow. Second operand 6 states and 185 transitions. [2024-06-28 00:59:13,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 130 transitions, 951 flow [2024-06-28 00:59:13,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 130 transitions, 922 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:13,289 INFO L231 Difference]: Finished difference. Result has 95 places, 97 transitions, 680 flow [2024-06-28 00:59:13,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=680, PETRI_PLACES=95, PETRI_TRANSITIONS=97} [2024-06-28 00:59:13,290 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2024-06-28 00:59:13,290 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 97 transitions, 680 flow [2024-06-28 00:59:13,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:13,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:13,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:13,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:59:13,291 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:13,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:13,291 INFO L85 PathProgramCache]: Analyzing trace with hash 364097297, now seen corresponding path program 2 times [2024-06-28 00:59:13,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:13,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751971014] [2024-06-28 00:59:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:13,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:13,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751971014] [2024-06-28 00:59:13,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751971014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:13,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:13,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:13,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276129623] [2024-06-28 00:59:13,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:13,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:13,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:13,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:13,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:13,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:13,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 97 transitions, 680 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:13,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:13,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:13,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:13,681 INFO L124 PetriNetUnfolderBase]: 1514/2563 cut-off events. [2024-06-28 00:59:13,682 INFO L125 PetriNetUnfolderBase]: For 14239/14267 co-relation queries the response was YES. [2024-06-28 00:59:13,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10096 conditions, 2563 events. 1514/2563 cut-off events. For 14239/14267 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15253 event pairs, 472 based on Foata normal form. 24/2513 useless extension candidates. Maximal degree in co-relation 10058. Up to 2015 conditions per place. [2024-06-28 00:59:13,701 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 78 selfloop transitions, 32 changer transitions 0/135 dead transitions. [2024-06-28 00:59:13,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 135 transitions, 1072 flow [2024-06-28 00:59:13,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:13,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-28 00:59:13,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2024-06-28 00:59:13,703 INFO L175 Difference]: Start difference. First operand has 95 places, 97 transitions, 680 flow. Second operand 6 states and 188 transitions. [2024-06-28 00:59:13,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 135 transitions, 1072 flow [2024-06-28 00:59:13,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 135 transitions, 1030 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:13,716 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 765 flow [2024-06-28 00:59:13,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=765, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-06-28 00:59:13,717 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2024-06-28 00:59:13,717 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 765 flow [2024-06-28 00:59:13,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:13,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:13,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:13,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:59:13,717 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:13,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:13,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1126939905, now seen corresponding path program 3 times [2024-06-28 00:59:13,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:13,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5760516] [2024-06-28 00:59:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:13,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:13,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:13,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5760516] [2024-06-28 00:59:13,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5760516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:13,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:13,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:13,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208127553] [2024-06-28 00:59:13,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:13,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:13,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:13,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:13,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:13,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:13,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 765 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:13,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:13,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:13,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:14,141 INFO L124 PetriNetUnfolderBase]: 1502/2456 cut-off events. [2024-06-28 00:59:14,142 INFO L125 PetriNetUnfolderBase]: For 16386/16409 co-relation queries the response was YES. [2024-06-28 00:59:14,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10428 conditions, 2456 events. 1502/2456 cut-off events. For 16386/16409 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14384 event pairs, 406 based on Foata normal form. 18/2391 useless extension candidates. Maximal degree in co-relation 10389. Up to 2003 conditions per place. [2024-06-28 00:59:14,158 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 73 selfloop transitions, 32 changer transitions 0/130 dead transitions. [2024-06-28 00:59:14,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 1039 flow [2024-06-28 00:59:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:14,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-28 00:59:14,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-28 00:59:14,160 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 765 flow. Second operand 6 states and 183 transitions. [2024-06-28 00:59:14,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 1039 flow [2024-06-28 00:59:14,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 130 transitions, 989 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-28 00:59:14,177 INFO L231 Difference]: Finished difference. Result has 101 places, 103 transitions, 788 flow [2024-06-28 00:59:14,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=788, PETRI_PLACES=101, PETRI_TRANSITIONS=103} [2024-06-28 00:59:14,178 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 51 predicate places. [2024-06-28 00:59:14,178 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 103 transitions, 788 flow [2024-06-28 00:59:14,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:14,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:14,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:14,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:59:14,179 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:14,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:14,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1524349748, now seen corresponding path program 1 times [2024-06-28 00:59:14,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:14,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153954526] [2024-06-28 00:59:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:14,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:14,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:14,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153954526] [2024-06-28 00:59:14,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153954526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:14,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:14,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:14,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632815875] [2024-06-28 00:59:14,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:14,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:14,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:14,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:14,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:14,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:14,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 103 transitions, 788 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:14,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:14,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:14,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:14,685 INFO L124 PetriNetUnfolderBase]: 1598/2635 cut-off events. [2024-06-28 00:59:14,685 INFO L125 PetriNetUnfolderBase]: For 16079/16079 co-relation queries the response was YES. [2024-06-28 00:59:14,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10819 conditions, 2635 events. 1598/2635 cut-off events. For 16079/16079 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15375 event pairs, 656 based on Foata normal form. 2/2613 useless extension candidates. Maximal degree in co-relation 10778. Up to 2285 conditions per place. [2024-06-28 00:59:14,700 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 121 selfloop transitions, 16 changer transitions 0/151 dead transitions. [2024-06-28 00:59:14,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 151 transitions, 1223 flow [2024-06-28 00:59:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:14,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-28 00:59:14,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-28 00:59:14,702 INFO L175 Difference]: Start difference. First operand has 101 places, 103 transitions, 788 flow. Second operand 7 states and 207 transitions. [2024-06-28 00:59:14,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 151 transitions, 1223 flow [2024-06-28 00:59:14,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 151 transitions, 1118 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:14,721 INFO L231 Difference]: Finished difference. Result has 104 places, 112 transitions, 812 flow [2024-06-28 00:59:14,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=812, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2024-06-28 00:59:14,722 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2024-06-28 00:59:14,722 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 812 flow [2024-06-28 00:59:14,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:14,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:14,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:14,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:59:14,723 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:14,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:14,723 INFO L85 PathProgramCache]: Analyzing trace with hash 580999440, now seen corresponding path program 2 times [2024-06-28 00:59:14,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:14,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158661363] [2024-06-28 00:59:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:14,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:14,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:14,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158661363] [2024-06-28 00:59:14,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158661363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:14,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:14,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:14,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855301156] [2024-06-28 00:59:14,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:14,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:14,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:14,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:14,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:14,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:14,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 812 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:14,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:14,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:14,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:15,125 INFO L124 PetriNetUnfolderBase]: 1637/2726 cut-off events. [2024-06-28 00:59:15,125 INFO L125 PetriNetUnfolderBase]: For 18579/18582 co-relation queries the response was YES. [2024-06-28 00:59:15,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11446 conditions, 2726 events. 1637/2726 cut-off events. For 18579/18582 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15946 event pairs, 521 based on Foata normal form. 2/2720 useless extension candidates. Maximal degree in co-relation 11403. Up to 2166 conditions per place. [2024-06-28 00:59:15,144 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 111 selfloop transitions, 40 changer transitions 0/165 dead transitions. [2024-06-28 00:59:15,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 165 transitions, 1426 flow [2024-06-28 00:59:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-28 00:59:15,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708074534161491 [2024-06-28 00:59:15,145 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 812 flow. Second operand 7 states and 216 transitions. [2024-06-28 00:59:15,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 165 transitions, 1426 flow [2024-06-28 00:59:15,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 165 transitions, 1380 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:15,169 INFO L231 Difference]: Finished difference. Result has 110 places, 124 transitions, 983 flow [2024-06-28 00:59:15,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=983, PETRI_PLACES=110, PETRI_TRANSITIONS=124} [2024-06-28 00:59:15,169 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 60 predicate places. [2024-06-28 00:59:15,169 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 124 transitions, 983 flow [2024-06-28 00:59:15,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:15,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:15,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:15,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:59:15,170 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:15,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:15,171 INFO L85 PathProgramCache]: Analyzing trace with hash 581206830, now seen corresponding path program 3 times [2024-06-28 00:59:15,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:15,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284177542] [2024-06-28 00:59:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:15,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:15,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:15,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284177542] [2024-06-28 00:59:15,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284177542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:15,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:15,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:15,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473084058] [2024-06-28 00:59:15,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:15,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:15,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:15,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:15,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:15,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:15,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 124 transitions, 983 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:15,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:15,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:15,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:15,582 INFO L124 PetriNetUnfolderBase]: 1632/2723 cut-off events. [2024-06-28 00:59:15,583 INFO L125 PetriNetUnfolderBase]: For 21372/21375 co-relation queries the response was YES. [2024-06-28 00:59:15,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12124 conditions, 2723 events. 1632/2723 cut-off events. For 21372/21375 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15905 event pairs, 522 based on Foata normal form. 2/2717 useless extension candidates. Maximal degree in co-relation 12078. Up to 2161 conditions per place. [2024-06-28 00:59:15,602 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 108 selfloop transitions, 42 changer transitions 0/164 dead transitions. [2024-06-28 00:59:15,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 164 transitions, 1453 flow [2024-06-28 00:59:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-28 00:59:15,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6614906832298136 [2024-06-28 00:59:15,603 INFO L175 Difference]: Start difference. First operand has 110 places, 124 transitions, 983 flow. Second operand 7 states and 213 transitions. [2024-06-28 00:59:15,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 164 transitions, 1453 flow [2024-06-28 00:59:15,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 164 transitions, 1387 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-28 00:59:15,628 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 1020 flow [2024-06-28 00:59:15,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1020, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2024-06-28 00:59:15,629 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 65 predicate places. [2024-06-28 00:59:15,629 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 1020 flow [2024-06-28 00:59:15,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:15,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:15,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:15,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:59:15,629 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:15,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:15,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1253041234, now seen corresponding path program 1 times [2024-06-28 00:59:15,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:15,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041076530] [2024-06-28 00:59:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:15,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:15,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:15,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041076530] [2024-06-28 00:59:15,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041076530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:15,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:15,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:15,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013104317] [2024-06-28 00:59:15,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:15,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:15,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:15,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:15,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:15,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:15,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 1020 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:15,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:15,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:15,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:16,061 INFO L124 PetriNetUnfolderBase]: 1659/2701 cut-off events. [2024-06-28 00:59:16,061 INFO L125 PetriNetUnfolderBase]: For 23351/23354 co-relation queries the response was YES. [2024-06-28 00:59:16,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12380 conditions, 2701 events. 1659/2701 cut-off events. For 23351/23354 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15666 event pairs, 460 based on Foata normal form. 4/2691 useless extension candidates. Maximal degree in co-relation 12332. Up to 2302 conditions per place. [2024-06-28 00:59:16,081 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 123 selfloop transitions, 27 changer transitions 0/164 dead transitions. [2024-06-28 00:59:16,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 164 transitions, 1422 flow [2024-06-28 00:59:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:16,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:16,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 00:59:16,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-28 00:59:16,082 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 1020 flow. Second operand 7 states and 208 transitions. [2024-06-28 00:59:16,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 164 transitions, 1422 flow [2024-06-28 00:59:16,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 164 transitions, 1350 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:16,111 INFO L231 Difference]: Finished difference. Result has 118 places, 127 transitions, 1027 flow [2024-06-28 00:59:16,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1027, PETRI_PLACES=118, PETRI_TRANSITIONS=127} [2024-06-28 00:59:16,111 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 68 predicate places. [2024-06-28 00:59:16,111 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 127 transitions, 1027 flow [2024-06-28 00:59:16,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:16,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:16,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:16,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:59:16,112 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:16,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:16,113 INFO L85 PathProgramCache]: Analyzing trace with hash -318689650, now seen corresponding path program 4 times [2024-06-28 00:59:16,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:16,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149994397] [2024-06-28 00:59:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:16,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:16,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:16,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149994397] [2024-06-28 00:59:16,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149994397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:16,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:16,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:16,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851200320] [2024-06-28 00:59:16,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:16,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:16,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:16,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:16,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:16,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:16,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 127 transitions, 1027 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:16,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:16,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:16,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:16,550 INFO L124 PetriNetUnfolderBase]: 1676/2782 cut-off events. [2024-06-28 00:59:16,550 INFO L125 PetriNetUnfolderBase]: For 25308/25308 co-relation queries the response was YES. [2024-06-28 00:59:16,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12828 conditions, 2782 events. 1676/2782 cut-off events. For 25308/25308 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16513 event pairs, 640 based on Foata normal form. 2/2757 useless extension candidates. Maximal degree in co-relation 12779. Up to 2220 conditions per place. [2024-06-28 00:59:16,568 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 105 selfloop transitions, 48 changer transitions 0/167 dead transitions. [2024-06-28 00:59:16,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 167 transitions, 1538 flow [2024-06-28 00:59:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-28 00:59:16,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-06-28 00:59:16,570 INFO L175 Difference]: Start difference. First operand has 118 places, 127 transitions, 1027 flow. Second operand 7 states and 209 transitions. [2024-06-28 00:59:16,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 167 transitions, 1538 flow [2024-06-28 00:59:16,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 167 transitions, 1477 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:16,603 INFO L231 Difference]: Finished difference. Result has 121 places, 132 transitions, 1141 flow [2024-06-28 00:59:16,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1141, PETRI_PLACES=121, PETRI_TRANSITIONS=132} [2024-06-28 00:59:16,604 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-06-28 00:59:16,604 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 132 transitions, 1141 flow [2024-06-28 00:59:16,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:16,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:16,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:16,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:59:16,605 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:16,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:16,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2016473774, now seen corresponding path program 5 times [2024-06-28 00:59:16,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:16,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124122405] [2024-06-28 00:59:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:16,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:16,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:16,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124122405] [2024-06-28 00:59:16,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124122405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:16,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:16,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:16,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131770087] [2024-06-28 00:59:16,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:16,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:16,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:16,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:16,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:16,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 132 transitions, 1141 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:16,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:16,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:16,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:17,045 INFO L124 PetriNetUnfolderBase]: 1693/2729 cut-off events. [2024-06-28 00:59:17,045 INFO L125 PetriNetUnfolderBase]: For 27709/27709 co-relation queries the response was YES. [2024-06-28 00:59:17,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13212 conditions, 2729 events. 1693/2729 cut-off events. For 27709/27709 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15713 event pairs, 432 based on Foata normal form. 2/2721 useless extension candidates. Maximal degree in co-relation 13161. Up to 2238 conditions per place. [2024-06-28 00:59:17,065 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 108 selfloop transitions, 48 changer transitions 0/170 dead transitions. [2024-06-28 00:59:17,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 170 transitions, 1652 flow [2024-06-28 00:59:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-28 00:59:17,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-06-28 00:59:17,068 INFO L175 Difference]: Start difference. First operand has 121 places, 132 transitions, 1141 flow. Second operand 7 states and 211 transitions. [2024-06-28 00:59:17,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 170 transitions, 1652 flow [2024-06-28 00:59:17,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 170 transitions, 1574 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:17,111 INFO L231 Difference]: Finished difference. Result has 125 places, 135 transitions, 1208 flow [2024-06-28 00:59:17,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1208, PETRI_PLACES=125, PETRI_TRANSITIONS=135} [2024-06-28 00:59:17,112 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 75 predicate places. [2024-06-28 00:59:17,112 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 135 transitions, 1208 flow [2024-06-28 00:59:17,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:17,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:17,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:17,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:59:17,113 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:17,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:17,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2016681164, now seen corresponding path program 6 times [2024-06-28 00:59:17,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:17,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187611212] [2024-06-28 00:59:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:17,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:17,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:17,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187611212] [2024-06-28 00:59:17,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187611212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:17,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:17,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:17,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738887670] [2024-06-28 00:59:17,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:17,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:17,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:17,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:17,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:17,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:17,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 135 transitions, 1208 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:17,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:17,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:17,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:17,518 INFO L124 PetriNetUnfolderBase]: 1688/2841 cut-off events. [2024-06-28 00:59:17,518 INFO L125 PetriNetUnfolderBase]: For 30328/30328 co-relation queries the response was YES. [2024-06-28 00:59:17,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13350 conditions, 2841 events. 1688/2841 cut-off events. For 30328/30328 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16944 event pairs, 606 based on Foata normal form. 2/2824 useless extension candidates. Maximal degree in co-relation 13298. Up to 2233 conditions per place. [2024-06-28 00:59:17,537 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 105 selfloop transitions, 49 changer transitions 0/168 dead transitions. [2024-06-28 00:59:17,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 168 transitions, 1594 flow [2024-06-28 00:59:17,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 00:59:17,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-28 00:59:17,538 INFO L175 Difference]: Start difference. First operand has 125 places, 135 transitions, 1208 flow. Second operand 7 states and 208 transitions. [2024-06-28 00:59:17,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 168 transitions, 1594 flow [2024-06-28 00:59:17,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 168 transitions, 1424 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:17,579 INFO L231 Difference]: Finished difference. Result has 126 places, 135 transitions, 1144 flow [2024-06-28 00:59:17,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1144, PETRI_PLACES=126, PETRI_TRANSITIONS=135} [2024-06-28 00:59:17,580 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 76 predicate places. [2024-06-28 00:59:17,580 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 135 transitions, 1144 flow [2024-06-28 00:59:17,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:17,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:17,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:17,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:59:17,581 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:17,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash -2016465838, now seen corresponding path program 2 times [2024-06-28 00:59:17,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:17,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900674584] [2024-06-28 00:59:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:17,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:17,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:17,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900674584] [2024-06-28 00:59:17,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900674584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:17,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:17,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:17,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591282023] [2024-06-28 00:59:17,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:17,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:17,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:17,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:17,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:17,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:17,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 135 transitions, 1144 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:17,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:17,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:17,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:18,003 INFO L124 PetriNetUnfolderBase]: 1715/2764 cut-off events. [2024-06-28 00:59:18,003 INFO L125 PetriNetUnfolderBase]: For 31751/31751 co-relation queries the response was YES. [2024-06-28 00:59:18,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13334 conditions, 2764 events. 1715/2764 cut-off events. For 31751/31751 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15840 event pairs, 423 based on Foata normal form. 4/2761 useless extension candidates. Maximal degree in co-relation 13282. Up to 2384 conditions per place. [2024-06-28 00:59:18,023 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 130 selfloop transitions, 27 changer transitions 0/171 dead transitions. [2024-06-28 00:59:18,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 171 transitions, 1556 flow [2024-06-28 00:59:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-28 00:59:18,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-28 00:59:18,027 INFO L175 Difference]: Start difference. First operand has 126 places, 135 transitions, 1144 flow. Second operand 7 states and 205 transitions. [2024-06-28 00:59:18,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 171 transitions, 1556 flow [2024-06-28 00:59:18,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 171 transitions, 1460 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:18,070 INFO L231 Difference]: Finished difference. Result has 128 places, 137 transitions, 1131 flow [2024-06-28 00:59:18,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1048, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1131, PETRI_PLACES=128, PETRI_TRANSITIONS=137} [2024-06-28 00:59:18,071 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 78 predicate places. [2024-06-28 00:59:18,071 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 137 transitions, 1131 flow [2024-06-28 00:59:18,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:18,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:18,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:18,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:59:18,072 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:18,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:18,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1750768558, now seen corresponding path program 3 times [2024-06-28 00:59:18,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:18,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941087649] [2024-06-28 00:59:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:18,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:18,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:18,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941087649] [2024-06-28 00:59:18,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941087649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:18,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:18,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:18,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820779625] [2024-06-28 00:59:18,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:18,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:18,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:18,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:18,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:18,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:18,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 137 transitions, 1131 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:18,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:18,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:18,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:18,545 INFO L124 PetriNetUnfolderBase]: 1742/2902 cut-off events. [2024-06-28 00:59:18,546 INFO L125 PetriNetUnfolderBase]: For 35004/35004 co-relation queries the response was YES. [2024-06-28 00:59:18,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13809 conditions, 2902 events. 1742/2902 cut-off events. For 35004/35004 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17304 event pairs, 664 based on Foata normal form. 4/2880 useless extension candidates. Maximal degree in co-relation 13756. Up to 2425 conditions per place. [2024-06-28 00:59:18,562 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 131 selfloop transitions, 28 changer transitions 0/173 dead transitions. [2024-06-28 00:59:18,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 173 transitions, 1551 flow [2024-06-28 00:59:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:18,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-28 00:59:18,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-06-28 00:59:18,564 INFO L175 Difference]: Start difference. First operand has 128 places, 137 transitions, 1131 flow. Second operand 7 states and 204 transitions. [2024-06-28 00:59:18,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 173 transitions, 1551 flow [2024-06-28 00:59:18,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 173 transitions, 1486 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:18,605 INFO L231 Difference]: Finished difference. Result has 130 places, 139 transitions, 1155 flow [2024-06-28 00:59:18,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1155, PETRI_PLACES=130, PETRI_TRANSITIONS=139} [2024-06-28 00:59:18,606 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 80 predicate places. [2024-06-28 00:59:18,606 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 139 transitions, 1155 flow [2024-06-28 00:59:18,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:18,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:18,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:18,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:59:18,607 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:18,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:18,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1750442128, now seen corresponding path program 4 times [2024-06-28 00:59:18,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:18,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448848646] [2024-06-28 00:59:18,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:18,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:18,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:18,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448848646] [2024-06-28 00:59:18,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448848646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:18,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:18,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:18,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032620597] [2024-06-28 00:59:18,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:18,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:18,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:18,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:18,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:18,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:18,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 139 transitions, 1155 flow. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:18,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:18,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:18,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:19,051 INFO L124 PetriNetUnfolderBase]: 1734/2879 cut-off events. [2024-06-28 00:59:19,051 INFO L125 PetriNetUnfolderBase]: For 37762/37762 co-relation queries the response was YES. [2024-06-28 00:59:19,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13903 conditions, 2879 events. 1734/2879 cut-off events. For 37762/37762 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17207 event pairs, 599 based on Foata normal form. 4/2856 useless extension candidates. Maximal degree in co-relation 13849. Up to 2302 conditions per place. [2024-06-28 00:59:19,070 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 127 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2024-06-28 00:59:19,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 176 transitions, 1587 flow [2024-06-28 00:59:19,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:19,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-28 00:59:19,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-28 00:59:19,072 INFO L175 Difference]: Start difference. First operand has 130 places, 139 transitions, 1155 flow. Second operand 7 states and 205 transitions. [2024-06-28 00:59:19,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 176 transitions, 1587 flow [2024-06-28 00:59:19,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 176 transitions, 1516 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:19,116 INFO L231 Difference]: Finished difference. Result has 132 places, 141 transitions, 1191 flow [2024-06-28 00:59:19,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1191, PETRI_PLACES=132, PETRI_TRANSITIONS=141} [2024-06-28 00:59:19,116 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 82 predicate places. [2024-06-28 00:59:19,117 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 141 transitions, 1191 flow [2024-06-28 00:59:19,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:19,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:19,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:19,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:59:19,117 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:19,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:19,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1171278304, now seen corresponding path program 1 times [2024-06-28 00:59:19,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:19,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022241319] [2024-06-28 00:59:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:19,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:19,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:19,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022241319] [2024-06-28 00:59:19,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022241319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:19,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:19,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:19,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760606047] [2024-06-28 00:59:19,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:19,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:19,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:19,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:19,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:19,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:19,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 141 transitions, 1191 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:19,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:19,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:19,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:19,636 INFO L124 PetriNetUnfolderBase]: 1740/3011 cut-off events. [2024-06-28 00:59:19,636 INFO L125 PetriNetUnfolderBase]: For 45933/45987 co-relation queries the response was YES. [2024-06-28 00:59:19,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14722 conditions, 3011 events. 1740/3011 cut-off events. For 45933/45987 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18383 event pairs, 435 based on Foata normal form. 14/2935 useless extension candidates. Maximal degree in co-relation 14667. Up to 2298 conditions per place. [2024-06-28 00:59:19,663 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 128 selfloop transitions, 27 changer transitions 0/194 dead transitions. [2024-06-28 00:59:19,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 194 transitions, 1753 flow [2024-06-28 00:59:19,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:19,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2024-06-28 00:59:19,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-28 00:59:19,665 INFO L175 Difference]: Start difference. First operand has 132 places, 141 transitions, 1191 flow. Second operand 8 states and 244 transitions. [2024-06-28 00:59:19,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 194 transitions, 1753 flow [2024-06-28 00:59:19,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 194 transitions, 1664 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:19,717 INFO L231 Difference]: Finished difference. Result has 135 places, 145 transitions, 1207 flow [2024-06-28 00:59:19,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1207, PETRI_PLACES=135, PETRI_TRANSITIONS=145} [2024-06-28 00:59:19,717 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 85 predicate places. [2024-06-28 00:59:19,717 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 145 transitions, 1207 flow [2024-06-28 00:59:19,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:19,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:19,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:19,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:59:19,718 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:19,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash -98036612, now seen corresponding path program 2 times [2024-06-28 00:59:19,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:19,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301281570] [2024-06-28 00:59:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:19,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:19,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:19,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301281570] [2024-06-28 00:59:19,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301281570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:19,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:19,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:19,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686224529] [2024-06-28 00:59:19,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:19,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:19,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:19,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:19,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:19,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:19,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 145 transitions, 1207 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:19,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:19,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:19,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:20,273 INFO L124 PetriNetUnfolderBase]: 1736/2969 cut-off events. [2024-06-28 00:59:20,274 INFO L125 PetriNetUnfolderBase]: For 47777/47824 co-relation queries the response was YES. [2024-06-28 00:59:20,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14781 conditions, 2969 events. 1736/2969 cut-off events. For 47777/47824 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18246 event pairs, 555 based on Foata normal form. 8/2886 useless extension candidates. Maximal degree in co-relation 14725. Up to 2378 conditions per place. [2024-06-28 00:59:20,294 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 123 selfloop transitions, 23 changer transitions 0/185 dead transitions. [2024-06-28 00:59:20,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 185 transitions, 1595 flow [2024-06-28 00:59:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-28 00:59:20,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6614906832298136 [2024-06-28 00:59:20,296 INFO L175 Difference]: Start difference. First operand has 135 places, 145 transitions, 1207 flow. Second operand 7 states and 213 transitions. [2024-06-28 00:59:20,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 185 transitions, 1595 flow [2024-06-28 00:59:20,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 185 transitions, 1538 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:20,353 INFO L231 Difference]: Finished difference. Result has 138 places, 145 transitions, 1204 flow [2024-06-28 00:59:20,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1204, PETRI_PLACES=138, PETRI_TRANSITIONS=145} [2024-06-28 00:59:20,355 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 88 predicate places. [2024-06-28 00:59:20,355 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 145 transitions, 1204 flow [2024-06-28 00:59:20,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:20,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:20,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:20,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:59:20,356 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:20,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:20,357 INFO L85 PathProgramCache]: Analyzing trace with hash 831109664, now seen corresponding path program 3 times [2024-06-28 00:59:20,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:20,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947941365] [2024-06-28 00:59:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:20,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:20,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:20,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947941365] [2024-06-28 00:59:20,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947941365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:20,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:20,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:20,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791253663] [2024-06-28 00:59:20,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:20,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:20,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:20,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:20,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:20,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:20,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 145 transitions, 1204 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:20,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:20,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:20,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:20,856 INFO L124 PetriNetUnfolderBase]: 1716/2814 cut-off events. [2024-06-28 00:59:20,856 INFO L125 PetriNetUnfolderBase]: For 50794/50841 co-relation queries the response was YES. [2024-06-28 00:59:20,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14648 conditions, 2814 events. 1716/2814 cut-off events. For 50794/50841 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16692 event pairs, 331 based on Foata normal form. 6/2725 useless extension candidates. Maximal degree in co-relation 14590. Up to 2255 conditions per place. [2024-06-28 00:59:20,876 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 103 selfloop transitions, 42 changer transitions 0/184 dead transitions. [2024-06-28 00:59:20,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 184 transitions, 1606 flow [2024-06-28 00:59:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-28 00:59:20,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6645962732919255 [2024-06-28 00:59:20,879 INFO L175 Difference]: Start difference. First operand has 138 places, 145 transitions, 1204 flow. Second operand 7 states and 214 transitions. [2024-06-28 00:59:20,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 184 transitions, 1606 flow [2024-06-28 00:59:20,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 184 transitions, 1554 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:20,944 INFO L231 Difference]: Finished difference. Result has 139 places, 147 transitions, 1272 flow [2024-06-28 00:59:20,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1272, PETRI_PLACES=139, PETRI_TRANSITIONS=147} [2024-06-28 00:59:20,945 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 89 predicate places. [2024-06-28 00:59:20,945 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 147 transitions, 1272 flow [2024-06-28 00:59:20,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:20,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:20,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:20,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:59:20,946 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:20,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:20,946 INFO L85 PathProgramCache]: Analyzing trace with hash -469156962, now seen corresponding path program 1 times [2024-06-28 00:59:20,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:20,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664044498] [2024-06-28 00:59:20,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:20,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:21,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:21,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664044498] [2024-06-28 00:59:21,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664044498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:21,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:21,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:21,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185576269] [2024-06-28 00:59:21,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:21,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:21,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:21,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:21,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:21,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:21,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 147 transitions, 1272 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:21,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:21,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:21,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:21,384 INFO L124 PetriNetUnfolderBase]: 1801/3044 cut-off events. [2024-06-28 00:59:21,384 INFO L125 PetriNetUnfolderBase]: For 49519/49533 co-relation queries the response was YES. [2024-06-28 00:59:21,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15366 conditions, 3044 events. 1801/3044 cut-off events. For 49519/49533 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18712 event pairs, 671 based on Foata normal form. 14/3029 useless extension candidates. Maximal degree in co-relation 15307. Up to 2469 conditions per place. [2024-06-28 00:59:21,407 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 128 selfloop transitions, 27 changer transitions 0/183 dead transitions. [2024-06-28 00:59:21,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 183 transitions, 1796 flow [2024-06-28 00:59:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 00:59:21,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-28 00:59:21,408 INFO L175 Difference]: Start difference. First operand has 139 places, 147 transitions, 1272 flow. Second operand 6 states and 180 transitions. [2024-06-28 00:59:21,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 183 transitions, 1796 flow [2024-06-28 00:59:21,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 183 transitions, 1686 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:21,466 INFO L231 Difference]: Finished difference. Result has 141 places, 158 transitions, 1342 flow [2024-06-28 00:59:21,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1342, PETRI_PLACES=141, PETRI_TRANSITIONS=158} [2024-06-28 00:59:21,467 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 91 predicate places. [2024-06-28 00:59:21,467 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 158 transitions, 1342 flow [2024-06-28 00:59:21,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:21,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:21,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:21,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:59:21,468 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:21,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:21,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1907389564, now seen corresponding path program 4 times [2024-06-28 00:59:21,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:21,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507426058] [2024-06-28 00:59:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:21,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:21,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:21,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507426058] [2024-06-28 00:59:21,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507426058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:21,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:21,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:21,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886520974] [2024-06-28 00:59:21,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:21,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:21,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:21,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:21,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:21,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:21,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 158 transitions, 1342 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:21,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:21,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:21,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:21,960 INFO L124 PetriNetUnfolderBase]: 1748/2869 cut-off events. [2024-06-28 00:59:21,960 INFO L125 PetriNetUnfolderBase]: For 56233/56290 co-relation queries the response was YES. [2024-06-28 00:59:21,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15352 conditions, 2869 events. 1748/2869 cut-off events. For 56233/56290 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17105 event pairs, 343 based on Foata normal form. 16/2784 useless extension candidates. Maximal degree in co-relation 15291. Up to 2281 conditions per place. [2024-06-28 00:59:21,981 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 108 selfloop transitions, 47 changer transitions 0/194 dead transitions. [2024-06-28 00:59:21,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 194 transitions, 1760 flow [2024-06-28 00:59:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-28 00:59:21,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-06-28 00:59:21,984 INFO L175 Difference]: Start difference. First operand has 141 places, 158 transitions, 1342 flow. Second operand 7 states and 211 transitions. [2024-06-28 00:59:21,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 194 transitions, 1760 flow [2024-06-28 00:59:22,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 194 transitions, 1728 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-28 00:59:22,051 INFO L231 Difference]: Finished difference. Result has 147 places, 160 transitions, 1444 flow [2024-06-28 00:59:22,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1444, PETRI_PLACES=147, PETRI_TRANSITIONS=160} [2024-06-28 00:59:22,052 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 97 predicate places. [2024-06-28 00:59:22,052 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 160 transitions, 1444 flow [2024-06-28 00:59:22,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:22,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:22,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:22,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:59:22,053 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:22,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:22,053 INFO L85 PathProgramCache]: Analyzing trace with hash -84926532, now seen corresponding path program 2 times [2024-06-28 00:59:22,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:22,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862307173] [2024-06-28 00:59:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:22,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:22,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862307173] [2024-06-28 00:59:22,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862307173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:22,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:22,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:22,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62157307] [2024-06-28 00:59:22,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:22,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:22,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:22,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:22,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:22,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:22,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 160 transitions, 1444 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:22,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:22,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:22,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:22,510 INFO L124 PetriNetUnfolderBase]: 1799/3071 cut-off events. [2024-06-28 00:59:22,510 INFO L125 PetriNetUnfolderBase]: For 53911/53922 co-relation queries the response was YES. [2024-06-28 00:59:22,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15867 conditions, 3071 events. 1799/3071 cut-off events. For 53911/53922 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18717 event pairs, 497 based on Foata normal form. 11/3077 useless extension candidates. Maximal degree in co-relation 15804. Up to 2492 conditions per place. [2024-06-28 00:59:22,599 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 129 selfloop transitions, 24 changer transitions 0/181 dead transitions. [2024-06-28 00:59:22,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 181 transitions, 1826 flow [2024-06-28 00:59:22,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:59:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:59:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-28 00:59:22,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7010869565217391 [2024-06-28 00:59:22,601 INFO L175 Difference]: Start difference. First operand has 147 places, 160 transitions, 1444 flow. Second operand 4 states and 129 transitions. [2024-06-28 00:59:22,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 181 transitions, 1826 flow [2024-06-28 00:59:22,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 181 transitions, 1712 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:22,688 INFO L231 Difference]: Finished difference. Result has 146 places, 163 transitions, 1437 flow [2024-06-28 00:59:22,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1437, PETRI_PLACES=146, PETRI_TRANSITIONS=163} [2024-06-28 00:59:22,689 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 96 predicate places. [2024-06-28 00:59:22,689 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 163 transitions, 1437 flow [2024-06-28 00:59:22,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:22,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:22,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:22,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:59:22,690 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:22,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:22,690 INFO L85 PathProgramCache]: Analyzing trace with hash -589425156, now seen corresponding path program 3 times [2024-06-28 00:59:22,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:22,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880466626] [2024-06-28 00:59:22,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:22,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:22,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:22,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880466626] [2024-06-28 00:59:22,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880466626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:22,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:22,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:22,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635204278] [2024-06-28 00:59:22,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:22,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:22,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:22,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:22,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:22,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:22,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 163 transitions, 1437 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:22,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:22,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:22,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:23,155 INFO L124 PetriNetUnfolderBase]: 1795/2974 cut-off events. [2024-06-28 00:59:23,155 INFO L125 PetriNetUnfolderBase]: For 54696/54696 co-relation queries the response was YES. [2024-06-28 00:59:23,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15607 conditions, 2974 events. 1795/2974 cut-off events. For 54696/54696 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17851 event pairs, 392 based on Foata normal form. 2/2972 useless extension candidates. Maximal degree in co-relation 15543. Up to 2457 conditions per place. [2024-06-28 00:59:23,177 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 126 selfloop transitions, 30 changer transitions 0/184 dead transitions. [2024-06-28 00:59:23,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 184 transitions, 1799 flow [2024-06-28 00:59:23,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:59:23,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:59:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-28 00:59:23,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2024-06-28 00:59:23,178 INFO L175 Difference]: Start difference. First operand has 146 places, 163 transitions, 1437 flow. Second operand 5 states and 154 transitions. [2024-06-28 00:59:23,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 184 transitions, 1799 flow [2024-06-28 00:59:23,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 184 transitions, 1746 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-28 00:59:23,243 INFO L231 Difference]: Finished difference. Result has 149 places, 163 transitions, 1456 flow [2024-06-28 00:59:23,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1456, PETRI_PLACES=149, PETRI_TRANSITIONS=163} [2024-06-28 00:59:23,243 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 99 predicate places. [2024-06-28 00:59:23,243 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 163 transitions, 1456 flow [2024-06-28 00:59:23,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:23,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:23,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:23,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:59:23,244 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:23,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:23,245 INFO L85 PathProgramCache]: Analyzing trace with hash -262408414, now seen corresponding path program 1 times [2024-06-28 00:59:23,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:23,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640948103] [2024-06-28 00:59:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:23,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:23,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:23,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640948103] [2024-06-28 00:59:23,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640948103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:23,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:23,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:23,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609139613] [2024-06-28 00:59:23,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:23,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:23,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:23,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:23,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:23,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:23,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 163 transitions, 1456 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:23,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:23,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:23,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:23,718 INFO L124 PetriNetUnfolderBase]: 1774/3073 cut-off events. [2024-06-28 00:59:23,718 INFO L125 PetriNetUnfolderBase]: For 59996/60000 co-relation queries the response was YES. [2024-06-28 00:59:23,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16030 conditions, 3073 events. 1774/3073 cut-off events. For 59996/60000 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19292 event pairs, 582 based on Foata normal form. 6/3047 useless extension candidates. Maximal degree in co-relation 15965. Up to 2448 conditions per place. [2024-06-28 00:59:23,740 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 139 selfloop transitions, 24 changer transitions 0/194 dead transitions. [2024-06-28 00:59:23,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 194 transitions, 1958 flow [2024-06-28 00:59:23,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 00:59:23,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-06-28 00:59:23,741 INFO L175 Difference]: Start difference. First operand has 149 places, 163 transitions, 1456 flow. Second operand 6 states and 179 transitions. [2024-06-28 00:59:23,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 194 transitions, 1958 flow [2024-06-28 00:59:23,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 194 transitions, 1885 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:23,831 INFO L231 Difference]: Finished difference. Result has 151 places, 169 transitions, 1501 flow [2024-06-28 00:59:23,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1501, PETRI_PLACES=151, PETRI_TRANSITIONS=169} [2024-06-28 00:59:23,832 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 101 predicate places. [2024-06-28 00:59:23,832 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 169 transitions, 1501 flow [2024-06-28 00:59:23,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:23,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:23,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:23,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:59:23,833 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:23,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:23,833 INFO L85 PathProgramCache]: Analyzing trace with hash -91586014, now seen corresponding path program 2 times [2024-06-28 00:59:23,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:23,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963982060] [2024-06-28 00:59:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:23,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:23,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:23,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963982060] [2024-06-28 00:59:23,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963982060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:23,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:23,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:23,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785650631] [2024-06-28 00:59:23,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:23,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:23,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:23,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:23,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:23,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:23,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 169 transitions, 1501 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:23,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:23,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:23,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:24,312 INFO L124 PetriNetUnfolderBase]: 1816/3141 cut-off events. [2024-06-28 00:59:24,312 INFO L125 PetriNetUnfolderBase]: For 60875/60879 co-relation queries the response was YES. [2024-06-28 00:59:24,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16513 conditions, 3141 events. 1816/3141 cut-off events. For 60875/60879 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19783 event pairs, 587 based on Foata normal form. 6/3116 useless extension candidates. Maximal degree in co-relation 16448. Up to 2516 conditions per place. [2024-06-28 00:59:24,337 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 143 selfloop transitions, 24 changer transitions 0/198 dead transitions. [2024-06-28 00:59:24,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 198 transitions, 1965 flow [2024-06-28 00:59:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:59:24,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:59:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-28 00:59:24,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-28 00:59:24,339 INFO L175 Difference]: Start difference. First operand has 151 places, 169 transitions, 1501 flow. Second operand 6 states and 174 transitions. [2024-06-28 00:59:24,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 198 transitions, 1965 flow [2024-06-28 00:59:24,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 198 transitions, 1916 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-28 00:59:24,440 INFO L231 Difference]: Finished difference. Result has 155 places, 177 transitions, 1595 flow [2024-06-28 00:59:24,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1459, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1595, PETRI_PLACES=155, PETRI_TRANSITIONS=177} [2024-06-28 00:59:24,441 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 105 predicate places. [2024-06-28 00:59:24,441 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 177 transitions, 1595 flow [2024-06-28 00:59:24,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:24,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:24,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:24,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:59:24,442 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:24,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:24,442 INFO L85 PathProgramCache]: Analyzing trace with hash -589210078, now seen corresponding path program 3 times [2024-06-28 00:59:24,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:24,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050748221] [2024-06-28 00:59:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:24,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:24,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:24,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050748221] [2024-06-28 00:59:24,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050748221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:24,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:24,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:24,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652612277] [2024-06-28 00:59:24,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:24,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:24,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:24,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:24,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:24,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:24,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 177 transitions, 1595 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:24,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:24,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:24,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:24,939 INFO L124 PetriNetUnfolderBase]: 1812/3023 cut-off events. [2024-06-28 00:59:24,939 INFO L125 PetriNetUnfolderBase]: For 62366/62366 co-relation queries the response was YES. [2024-06-28 00:59:24,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16503 conditions, 3023 events. 1812/3023 cut-off events. For 62366/62366 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18336 event pairs, 339 based on Foata normal form. 2/3020 useless extension candidates. Maximal degree in co-relation 16436. Up to 2482 conditions per place. [2024-06-28 00:59:24,961 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 138 selfloop transitions, 29 changer transitions 0/198 dead transitions. [2024-06-28 00:59:24,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 198 transitions, 1979 flow [2024-06-28 00:59:24,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:59:24,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:59:24,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-28 00:59:24,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6652173913043479 [2024-06-28 00:59:24,963 INFO L175 Difference]: Start difference. First operand has 155 places, 177 transitions, 1595 flow. Second operand 5 states and 153 transitions. [2024-06-28 00:59:24,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 198 transitions, 1979 flow [2024-06-28 00:59:25,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 198 transitions, 1902 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:25,047 INFO L231 Difference]: Finished difference. Result has 157 places, 177 transitions, 1592 flow [2024-06-28 00:59:25,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1592, PETRI_PLACES=157, PETRI_TRANSITIONS=177} [2024-06-28 00:59:25,048 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 107 predicate places. [2024-06-28 00:59:25,048 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 177 transitions, 1592 flow [2024-06-28 00:59:25,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:25,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:25,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:25,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:59:25,049 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:25,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:25,049 INFO L85 PathProgramCache]: Analyzing trace with hash -588963814, now seen corresponding path program 1 times [2024-06-28 00:59:25,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:25,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680214695] [2024-06-28 00:59:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:25,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:25,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:25,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680214695] [2024-06-28 00:59:25,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680214695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:25,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:25,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:59:25,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490674311] [2024-06-28 00:59:25,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:25,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:59:25,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:25,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:59:25,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:59:25,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:25,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 177 transitions, 1592 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:25,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:25,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:25,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:25,486 INFO L124 PetriNetUnfolderBase]: 1850/3069 cut-off events. [2024-06-28 00:59:25,486 INFO L125 PetriNetUnfolderBase]: For 62779/62779 co-relation queries the response was YES. [2024-06-28 00:59:25,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16507 conditions, 3069 events. 1850/3069 cut-off events. For 62779/62779 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18569 event pairs, 389 based on Foata normal form. 2/3063 useless extension candidates. Maximal degree in co-relation 16439. Up to 2593 conditions per place. [2024-06-28 00:59:25,513 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 154 selfloop transitions, 10 changer transitions 0/192 dead transitions. [2024-06-28 00:59:25,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 192 transitions, 1972 flow [2024-06-28 00:59:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:59:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:59:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-28 00:59:25,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657608695652174 [2024-06-28 00:59:25,514 INFO L175 Difference]: Start difference. First operand has 157 places, 177 transitions, 1592 flow. Second operand 4 states and 121 transitions. [2024-06-28 00:59:25,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 192 transitions, 1972 flow [2024-06-28 00:59:25,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 192 transitions, 1912 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:25,605 INFO L231 Difference]: Finished difference. Result has 157 places, 179 transitions, 1583 flow [2024-06-28 00:59:25,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1583, PETRI_PLACES=157, PETRI_TRANSITIONS=179} [2024-06-28 00:59:25,606 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 107 predicate places. [2024-06-28 00:59:25,606 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 179 transitions, 1583 flow [2024-06-28 00:59:25,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:25,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:25,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:25,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:59:25,607 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:25,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:25,608 INFO L85 PathProgramCache]: Analyzing trace with hash -212873647, now seen corresponding path program 1 times [2024-06-28 00:59:25,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:25,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051899529] [2024-06-28 00:59:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:25,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:25,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:25,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051899529] [2024-06-28 00:59:25,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051899529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:25,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:25,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:25,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382186013] [2024-06-28 00:59:25,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:25,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:25,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:25,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:25,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:25,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:25,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 179 transitions, 1583 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:25,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:25,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:25,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:26,325 INFO L124 PetriNetUnfolderBase]: 2160/3563 cut-off events. [2024-06-28 00:59:26,325 INFO L125 PetriNetUnfolderBase]: For 79230/79230 co-relation queries the response was YES. [2024-06-28 00:59:26,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19136 conditions, 3563 events. 2160/3563 cut-off events. For 79230/79230 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21944 event pairs, 535 based on Foata normal form. 12/3544 useless extension candidates. Maximal degree in co-relation 19067. Up to 2749 conditions per place. [2024-06-28 00:59:26,353 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 212 selfloop transitions, 20 changer transitions 0/246 dead transitions. [2024-06-28 00:59:26,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 246 transitions, 2407 flow [2024-06-28 00:59:26,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:59:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:59:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 269 transitions. [2024-06-28 00:59:26,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6497584541062802 [2024-06-28 00:59:26,355 INFO L175 Difference]: Start difference. First operand has 157 places, 179 transitions, 1583 flow. Second operand 9 states and 269 transitions. [2024-06-28 00:59:26,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 246 transitions, 2407 flow [2024-06-28 00:59:26,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 246 transitions, 2372 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-28 00:59:26,454 INFO L231 Difference]: Finished difference. Result has 166 places, 184 transitions, 1668 flow [2024-06-28 00:59:26,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1668, PETRI_PLACES=166, PETRI_TRANSITIONS=184} [2024-06-28 00:59:26,454 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 116 predicate places. [2024-06-28 00:59:26,455 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 184 transitions, 1668 flow [2024-06-28 00:59:26,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:26,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:26,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:26,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:59:26,455 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:26,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:26,456 INFO L85 PathProgramCache]: Analyzing trace with hash -124160017, now seen corresponding path program 2 times [2024-06-28 00:59:26,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:26,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753784618] [2024-06-28 00:59:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:26,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:26,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:26,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753784618] [2024-06-28 00:59:26,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753784618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:26,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:26,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:26,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347613910] [2024-06-28 00:59:26,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:26,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:26,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:26,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:26,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:26,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:26,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 184 transitions, 1668 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:26,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:26,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:26,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:27,166 INFO L124 PetriNetUnfolderBase]: 2219/3688 cut-off events. [2024-06-28 00:59:27,167 INFO L125 PetriNetUnfolderBase]: For 84168/84168 co-relation queries the response was YES. [2024-06-28 00:59:27,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19880 conditions, 3688 events. 2219/3688 cut-off events. For 84168/84168 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22988 event pairs, 748 based on Foata normal form. 16/3671 useless extension candidates. Maximal degree in co-relation 19808. Up to 3092 conditions per place. [2024-06-28 00:59:27,195 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 203 selfloop transitions, 17 changer transitions 0/234 dead transitions. [2024-06-28 00:59:27,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 234 transitions, 2265 flow [2024-06-28 00:59:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-28 00:59:27,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-28 00:59:27,197 INFO L175 Difference]: Start difference. First operand has 166 places, 184 transitions, 1668 flow. Second operand 8 states and 236 transitions. [2024-06-28 00:59:27,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 234 transitions, 2265 flow [2024-06-28 00:59:27,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 234 transitions, 2223 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:27,317 INFO L231 Difference]: Finished difference. Result has 170 places, 185 transitions, 1688 flow [2024-06-28 00:59:27,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1626, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1688, PETRI_PLACES=170, PETRI_TRANSITIONS=185} [2024-06-28 00:59:27,317 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 120 predicate places. [2024-06-28 00:59:27,318 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 185 transitions, 1688 flow [2024-06-28 00:59:27,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:27,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:27,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:27,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:59:27,318 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:27,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:27,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1255833461, now seen corresponding path program 3 times [2024-06-28 00:59:27,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:27,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673050913] [2024-06-28 00:59:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:27,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:27,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:27,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673050913] [2024-06-28 00:59:27,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673050913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:27,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:27,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:27,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626179634] [2024-06-28 00:59:27,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:27,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:27,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:27,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:27,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:27,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:27,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 185 transitions, 1688 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:27,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:27,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:27,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:28,012 INFO L124 PetriNetUnfolderBase]: 2199/3654 cut-off events. [2024-06-28 00:59:28,012 INFO L125 PetriNetUnfolderBase]: For 80181/80181 co-relation queries the response was YES. [2024-06-28 00:59:28,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19462 conditions, 3654 events. 2199/3654 cut-off events. For 80181/80181 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22689 event pairs, 693 based on Foata normal form. 12/3637 useless extension candidates. Maximal degree in co-relation 19388. Up to 2935 conditions per place. [2024-06-28 00:59:28,045 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 207 selfloop transitions, 19 changer transitions 0/240 dead transitions. [2024-06-28 00:59:28,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 240 transitions, 2341 flow [2024-06-28 00:59:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:28,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-28 00:59:28,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494565217391305 [2024-06-28 00:59:28,047 INFO L175 Difference]: Start difference. First operand has 170 places, 185 transitions, 1688 flow. Second operand 8 states and 239 transitions. [2024-06-28 00:59:28,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 240 transitions, 2341 flow [2024-06-28 00:59:28,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 240 transitions, 2270 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:28,202 INFO L231 Difference]: Finished difference. Result has 173 places, 188 transitions, 1718 flow [2024-06-28 00:59:28,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1718, PETRI_PLACES=173, PETRI_TRANSITIONS=188} [2024-06-28 00:59:28,203 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 123 predicate places. [2024-06-28 00:59:28,203 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 188 transitions, 1718 flow [2024-06-28 00:59:28,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:28,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:28,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:28,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:59:28,204 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:28,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:28,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1374886163, now seen corresponding path program 4 times [2024-06-28 00:59:28,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:28,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027105399] [2024-06-28 00:59:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:28,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:28,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:28,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027105399] [2024-06-28 00:59:28,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027105399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:28,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:28,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:28,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569171250] [2024-06-28 00:59:28,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:28,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:28,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:28,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:28,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:28,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:28,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 188 transitions, 1718 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:28,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:28,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:28,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:28,879 INFO L124 PetriNetUnfolderBase]: 2293/3766 cut-off events. [2024-06-28 00:59:28,880 INFO L125 PetriNetUnfolderBase]: For 86243/86246 co-relation queries the response was YES. [2024-06-28 00:59:28,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20037 conditions, 3766 events. 2293/3766 cut-off events. For 86243/86246 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23451 event pairs, 517 based on Foata normal form. 16/3764 useless extension candidates. Maximal degree in co-relation 19961. Up to 3028 conditions per place. [2024-06-28 00:59:28,904 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 172 selfloop transitions, 49 changer transitions 0/235 dead transitions. [2024-06-28 00:59:28,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 235 transitions, 2308 flow [2024-06-28 00:59:28,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:28,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-28 00:59:28,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654891304347826 [2024-06-28 00:59:28,906 INFO L175 Difference]: Start difference. First operand has 173 places, 188 transitions, 1718 flow. Second operand 8 states and 241 transitions. [2024-06-28 00:59:28,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 235 transitions, 2308 flow [2024-06-28 00:59:29,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 235 transitions, 2288 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:29,010 INFO L231 Difference]: Finished difference. Result has 177 places, 189 transitions, 1823 flow [2024-06-28 00:59:29,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1823, PETRI_PLACES=177, PETRI_TRANSITIONS=189} [2024-06-28 00:59:29,010 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 127 predicate places. [2024-06-28 00:59:29,010 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 189 transitions, 1823 flow [2024-06-28 00:59:29,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:29,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:29,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:29,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:59:29,011 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:29,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:29,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1374738293, now seen corresponding path program 5 times [2024-06-28 00:59:29,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:29,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287873354] [2024-06-28 00:59:29,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:29,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:29,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:29,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287873354] [2024-06-28 00:59:29,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287873354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:29,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:29,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:29,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065442174] [2024-06-28 00:59:29,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:29,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:29,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:29,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:29,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:29,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:29,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 189 transitions, 1823 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:29,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:29,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:29,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:29,689 INFO L124 PetriNetUnfolderBase]: 2482/4207 cut-off events. [2024-06-28 00:59:29,689 INFO L125 PetriNetUnfolderBase]: For 101204/101207 co-relation queries the response was YES. [2024-06-28 00:59:29,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22652 conditions, 4207 events. 2482/4207 cut-off events. For 101204/101207 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 27458 event pairs, 767 based on Foata normal form. 12/4177 useless extension candidates. Maximal degree in co-relation 22574. Up to 3038 conditions per place. [2024-06-28 00:59:29,727 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 178 selfloop transitions, 51 changer transitions 0/243 dead transitions. [2024-06-28 00:59:29,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 243 transitions, 2613 flow [2024-06-28 00:59:29,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-06-28 00:59:29,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6657608695652174 [2024-06-28 00:59:29,729 INFO L175 Difference]: Start difference. First operand has 177 places, 189 transitions, 1823 flow. Second operand 8 states and 245 transitions. [2024-06-28 00:59:29,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 243 transitions, 2613 flow [2024-06-28 00:59:29,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 243 transitions, 2506 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:29,938 INFO L231 Difference]: Finished difference. Result has 180 places, 192 transitions, 1880 flow [2024-06-28 00:59:29,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1880, PETRI_PLACES=180, PETRI_TRANSITIONS=192} [2024-06-28 00:59:29,939 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 130 predicate places. [2024-06-28 00:59:29,939 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 192 transitions, 1880 flow [2024-06-28 00:59:29,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:29,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:29,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:29,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:59:29,939 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:29,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:29,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1574187953, now seen corresponding path program 6 times [2024-06-28 00:59:29,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:29,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595202567] [2024-06-28 00:59:29,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:29,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:30,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:30,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595202567] [2024-06-28 00:59:30,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595202567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:30,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:30,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:30,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800202276] [2024-06-28 00:59:30,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:30,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:30,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:30,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:30,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:30,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:30,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 192 transitions, 1880 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:30,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:30,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:30,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:30,637 INFO L124 PetriNetUnfolderBase]: 2454/4142 cut-off events. [2024-06-28 00:59:30,638 INFO L125 PetriNetUnfolderBase]: For 98147/98150 co-relation queries the response was YES. [2024-06-28 00:59:30,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22034 conditions, 4142 events. 2454/4142 cut-off events. For 98147/98150 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 26611 event pairs, 614 based on Foata normal form. 16/4149 useless extension candidates. Maximal degree in co-relation 21954. Up to 3287 conditions per place. [2024-06-28 00:59:30,667 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 175 selfloop transitions, 50 changer transitions 0/239 dead transitions. [2024-06-28 00:59:30,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 239 transitions, 2483 flow [2024-06-28 00:59:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-06-28 00:59:30,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-28 00:59:30,668 INFO L175 Difference]: Start difference. First operand has 180 places, 192 transitions, 1880 flow. Second operand 8 states and 240 transitions. [2024-06-28 00:59:30,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 239 transitions, 2483 flow [2024-06-28 00:59:30,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 239 transitions, 2391 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:30,848 INFO L231 Difference]: Finished difference. Result has 184 places, 193 transitions, 1920 flow [2024-06-28 00:59:30,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1920, PETRI_PLACES=184, PETRI_TRANSITIONS=193} [2024-06-28 00:59:30,849 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 134 predicate places. [2024-06-28 00:59:30,849 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 193 transitions, 1920 flow [2024-06-28 00:59:30,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:30,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:30,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:30,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:59:30,850 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:30,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:30,850 INFO L85 PathProgramCache]: Analyzing trace with hash 322397, now seen corresponding path program 1 times [2024-06-28 00:59:30,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:30,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394355764] [2024-06-28 00:59:30,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:30,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:30,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:30,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394355764] [2024-06-28 00:59:30,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394355764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:30,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:30,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:30,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642874699] [2024-06-28 00:59:30,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:30,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:30,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:30,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:30,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:31,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:31,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 193 transitions, 1920 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:31,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:31,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:31,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:31,527 INFO L124 PetriNetUnfolderBase]: 2521/4247 cut-off events. [2024-06-28 00:59:31,528 INFO L125 PetriNetUnfolderBase]: For 98713/98716 co-relation queries the response was YES. [2024-06-28 00:59:31,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22581 conditions, 4247 events. 2521/4247 cut-off events. For 98713/98716 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 27384 event pairs, 591 based on Foata normal form. 12/4250 useless extension candidates. Maximal degree in co-relation 22499. Up to 3007 conditions per place. [2024-06-28 00:59:31,562 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 175 selfloop transitions, 54 changer transitions 0/243 dead transitions. [2024-06-28 00:59:31,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 243 transitions, 2548 flow [2024-06-28 00:59:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:31,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 242 transitions. [2024-06-28 00:59:31,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.657608695652174 [2024-06-28 00:59:31,564 INFO L175 Difference]: Start difference. First operand has 184 places, 193 transitions, 1920 flow. Second operand 8 states and 242 transitions. [2024-06-28 00:59:31,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 243 transitions, 2548 flow [2024-06-28 00:59:31,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 243 transitions, 2449 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:31,752 INFO L231 Difference]: Finished difference. Result has 186 places, 194 transitions, 1959 flow [2024-06-28 00:59:31,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1959, PETRI_PLACES=186, PETRI_TRANSITIONS=194} [2024-06-28 00:59:31,753 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 136 predicate places. [2024-06-28 00:59:31,753 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 194 transitions, 1959 flow [2024-06-28 00:59:31,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:31,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:31,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:31,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:59:31,754 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:31,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:31,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1318044179, now seen corresponding path program 7 times [2024-06-28 00:59:31,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:31,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087243610] [2024-06-28 00:59:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:31,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:31,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:31,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087243610] [2024-06-28 00:59:31,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087243610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:31,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:31,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:31,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972901165] [2024-06-28 00:59:31,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:31,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:31,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:31,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:31,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:31,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:31,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 194 transitions, 1959 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:31,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:31,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:31,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:32,421 INFO L124 PetriNetUnfolderBase]: 2615/4270 cut-off events. [2024-06-28 00:59:32,421 INFO L125 PetriNetUnfolderBase]: For 107982/107982 co-relation queries the response was YES. [2024-06-28 00:59:32,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23532 conditions, 4270 events. 2615/4270 cut-off events. For 107982/107982 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 27144 event pairs, 517 based on Foata normal form. 16/4276 useless extension candidates. Maximal degree in co-relation 23449. Up to 3546 conditions per place. [2024-06-28 00:59:32,455 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 172 selfloop transitions, 52 changer transitions 0/238 dead transitions. [2024-06-28 00:59:32,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 238 transitions, 2553 flow [2024-06-28 00:59:32,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-28 00:59:32,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-28 00:59:32,459 INFO L175 Difference]: Start difference. First operand has 186 places, 194 transitions, 1959 flow. Second operand 8 states and 236 transitions. [2024-06-28 00:59:32,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 238 transitions, 2553 flow [2024-06-28 00:59:32,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 238 transitions, 2429 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:32,644 INFO L231 Difference]: Finished difference. Result has 188 places, 195 transitions, 1972 flow [2024-06-28 00:59:32,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1972, PETRI_PLACES=188, PETRI_TRANSITIONS=195} [2024-06-28 00:59:32,645 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 138 predicate places. [2024-06-28 00:59:32,645 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 195 transitions, 1972 flow [2024-06-28 00:59:32,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:32,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:32,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:32,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:59:32,646 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:32,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:32,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2059473579, now seen corresponding path program 8 times [2024-06-28 00:59:32,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:32,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483040717] [2024-06-28 00:59:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:32,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:32,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:32,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483040717] [2024-06-28 00:59:32,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483040717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:32,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:32,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:32,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044019835] [2024-06-28 00:59:32,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:32,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:32,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:32,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:32,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:32,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:32,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 195 transitions, 1972 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:32,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:32,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:32,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:33,330 INFO L124 PetriNetUnfolderBase]: 2709/4420 cut-off events. [2024-06-28 00:59:33,331 INFO L125 PetriNetUnfolderBase]: For 114131/114131 co-relation queries the response was YES. [2024-06-28 00:59:33,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24271 conditions, 4420 events. 2709/4420 cut-off events. For 114131/114131 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28301 event pairs, 531 based on Foata normal form. 16/4426 useless extension candidates. Maximal degree in co-relation 24187. Up to 3696 conditions per place. [2024-06-28 00:59:33,369 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 176 selfloop transitions, 49 changer transitions 0/239 dead transitions. [2024-06-28 00:59:33,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 239 transitions, 2570 flow [2024-06-28 00:59:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-28 00:59:33,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-06-28 00:59:33,371 INFO L175 Difference]: Start difference. First operand has 188 places, 195 transitions, 1972 flow. Second operand 8 states and 238 transitions. [2024-06-28 00:59:33,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 239 transitions, 2570 flow [2024-06-28 00:59:33,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 239 transitions, 2451 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:33,607 INFO L231 Difference]: Finished difference. Result has 190 places, 196 transitions, 1986 flow [2024-06-28 00:59:33,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1986, PETRI_PLACES=190, PETRI_TRANSITIONS=196} [2024-06-28 00:59:33,607 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 140 predicate places. [2024-06-28 00:59:33,608 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 196 transitions, 1986 flow [2024-06-28 00:59:33,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:33,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:33,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:33,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:59:33,608 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:33,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:33,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1000316653, now seen corresponding path program 9 times [2024-06-28 00:59:33,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:33,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705305841] [2024-06-28 00:59:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:33,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:33,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:33,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705305841] [2024-06-28 00:59:33,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705305841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:33,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:33,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:33,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425824696] [2024-06-28 00:59:33,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:33,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:33,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:33,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:33,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:33,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:33,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 196 transitions, 1986 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:33,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:33,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:33,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:34,457 INFO L124 PetriNetUnfolderBase]: 2803/4792 cut-off events. [2024-06-28 00:59:34,458 INFO L125 PetriNetUnfolderBase]: For 122250/122250 co-relation queries the response was YES. [2024-06-28 00:59:34,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25263 conditions, 4792 events. 2803/4792 cut-off events. For 122250/122250 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 32351 event pairs, 931 based on Foata normal form. 16/4747 useless extension candidates. Maximal degree in co-relation 25178. Up to 3846 conditions per place. [2024-06-28 00:59:34,509 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 176 selfloop transitions, 50 changer transitions 0/240 dead transitions. [2024-06-28 00:59:34,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 240 transitions, 2588 flow [2024-06-28 00:59:34,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-28 00:59:34,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-28 00:59:34,512 INFO L175 Difference]: Start difference. First operand has 190 places, 196 transitions, 1986 flow. Second operand 8 states and 237 transitions. [2024-06-28 00:59:34,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 240 transitions, 2588 flow [2024-06-28 00:59:34,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 240 transitions, 2473 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:34,739 INFO L231 Difference]: Finished difference. Result has 192 places, 197 transitions, 2008 flow [2024-06-28 00:59:34,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2008, PETRI_PLACES=192, PETRI_TRANSITIONS=197} [2024-06-28 00:59:34,740 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 142 predicate places. [2024-06-28 00:59:34,740 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 197 transitions, 2008 flow [2024-06-28 00:59:34,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:34,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:34,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:34,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:59:34,741 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:34,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1000464523, now seen corresponding path program 10 times [2024-06-28 00:59:34,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:34,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488388803] [2024-06-28 00:59:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:34,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:34,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:34,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488388803] [2024-06-28 00:59:34,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488388803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:34,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:34,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:34,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028802436] [2024-06-28 00:59:34,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:34,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:34,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:34,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:34,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:34,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:34,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 197 transitions, 2008 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:34,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:34,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:34,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:35,492 INFO L124 PetriNetUnfolderBase]: 2835/4814 cut-off events. [2024-06-28 00:59:35,493 INFO L125 PetriNetUnfolderBase]: For 119690/119690 co-relation queries the response was YES. [2024-06-28 00:59:35,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25243 conditions, 4814 events. 2835/4814 cut-off events. For 119690/119690 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 32451 event pairs, 885 based on Foata normal form. 12/4773 useless extension candidates. Maximal degree in co-relation 25157. Up to 3513 conditions per place. [2024-06-28 00:59:35,534 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 178 selfloop transitions, 54 changer transitions 0/246 dead transitions. [2024-06-28 00:59:35,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 246 transitions, 2674 flow [2024-06-28 00:59:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-28 00:59:35,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494565217391305 [2024-06-28 00:59:35,543 INFO L175 Difference]: Start difference. First operand has 192 places, 197 transitions, 2008 flow. Second operand 8 states and 239 transitions. [2024-06-28 00:59:35,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 246 transitions, 2674 flow [2024-06-28 00:59:35,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 246 transitions, 2555 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:35,796 INFO L231 Difference]: Finished difference. Result has 195 places, 200 transitions, 2083 flow [2024-06-28 00:59:35,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1889, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2083, PETRI_PLACES=195, PETRI_TRANSITIONS=200} [2024-06-28 00:59:35,797 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 145 predicate places. [2024-06-28 00:59:35,797 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 200 transitions, 2083 flow [2024-06-28 00:59:35,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:35,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:35,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:35,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:59:35,798 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:35,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:35,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1138625265, now seen corresponding path program 2 times [2024-06-28 00:59:35,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:35,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595057985] [2024-06-28 00:59:35,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:35,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:35,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:35,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595057985] [2024-06-28 00:59:35,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595057985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:35,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:35,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:35,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649736519] [2024-06-28 00:59:35,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:35,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:35,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:35,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:35,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:35,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:35,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 200 transitions, 2083 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:35,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:35,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:35,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:36,586 INFO L124 PetriNetUnfolderBase]: 2902/4968 cut-off events. [2024-06-28 00:59:36,586 INFO L125 PetriNetUnfolderBase]: For 125920/125920 co-relation queries the response was YES. [2024-06-28 00:59:36,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26003 conditions, 4968 events. 2902/4968 cut-off events. For 125920/125920 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33548 event pairs, 690 based on Foata normal form. 12/4967 useless extension candidates. Maximal degree in co-relation 25915. Up to 3886 conditions per place. [2024-06-28 00:59:36,626 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 179 selfloop transitions, 54 changer transitions 0/247 dead transitions. [2024-06-28 00:59:36,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 247 transitions, 2721 flow [2024-06-28 00:59:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:36,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:36,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-28 00:59:36,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494565217391305 [2024-06-28 00:59:36,628 INFO L175 Difference]: Start difference. First operand has 195 places, 200 transitions, 2083 flow. Second operand 8 states and 239 transitions. [2024-06-28 00:59:36,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 247 transitions, 2721 flow [2024-06-28 00:59:36,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 247 transitions, 2623 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:36,927 INFO L231 Difference]: Finished difference. Result has 199 places, 201 transitions, 2133 flow [2024-06-28 00:59:36,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2133, PETRI_PLACES=199, PETRI_TRANSITIONS=201} [2024-06-28 00:59:36,927 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 149 predicate places. [2024-06-28 00:59:36,927 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 201 transitions, 2133 flow [2024-06-28 00:59:36,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:36,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:36,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:36,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:59:36,928 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:36,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1452324495, now seen corresponding path program 3 times [2024-06-28 00:59:36,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:36,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174235115] [2024-06-28 00:59:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:37,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:37,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174235115] [2024-06-28 00:59:37,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174235115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:37,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:37,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:37,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927745808] [2024-06-28 00:59:37,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:37,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:37,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:37,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:37,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:37,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:37,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 201 transitions, 2133 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:37,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:37,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:37,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:37,667 INFO L124 PetriNetUnfolderBase]: 2969/4893 cut-off events. [2024-06-28 00:59:37,668 INFO L125 PetriNetUnfolderBase]: For 129948/129948 co-relation queries the response was YES. [2024-06-28 00:59:37,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26618 conditions, 4893 events. 2969/4893 cut-off events. For 129948/129948 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 32307 event pairs, 518 based on Foata normal form. 12/4895 useless extension candidates. Maximal degree in co-relation 26528. Up to 2901 conditions per place. [2024-06-28 00:59:37,710 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 170 selfloop transitions, 66 changer transitions 0/250 dead transitions. [2024-06-28 00:59:37,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 250 transitions, 2873 flow [2024-06-28 00:59:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:37,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-06-28 00:59:37,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-28 00:59:37,711 INFO L175 Difference]: Start difference. First operand has 199 places, 201 transitions, 2133 flow. Second operand 8 states and 240 transitions. [2024-06-28 00:59:37,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 250 transitions, 2873 flow [2024-06-28 00:59:37,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 250 transitions, 2739 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:37,962 INFO L231 Difference]: Finished difference. Result has 201 places, 202 transitions, 2171 flow [2024-06-28 00:59:37,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2171, PETRI_PLACES=201, PETRI_TRANSITIONS=202} [2024-06-28 00:59:37,962 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 151 predicate places. [2024-06-28 00:59:37,962 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 202 transitions, 2171 flow [2024-06-28 00:59:37,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:37,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:37,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:37,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:59:37,963 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:37,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:37,964 INFO L85 PathProgramCache]: Analyzing trace with hash -793390351, now seen corresponding path program 4 times [2024-06-28 00:59:37,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:37,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981013407] [2024-06-28 00:59:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:37,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:38,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:38,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981013407] [2024-06-28 00:59:38,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981013407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:38,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:38,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:59:38,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326995146] [2024-06-28 00:59:38,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:38,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:59:38,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:38,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:59:38,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:59:38,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:38,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 202 transitions, 2171 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:38,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:38,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:38,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:38,775 INFO L124 PetriNetUnfolderBase]: 2949/5051 cut-off events. [2024-06-28 00:59:38,775 INFO L125 PetriNetUnfolderBase]: For 123610/123610 co-relation queries the response was YES. [2024-06-28 00:59:38,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26170 conditions, 5051 events. 2949/5051 cut-off events. For 123610/123610 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 34640 event pairs, 955 based on Foata normal form. 12/5004 useless extension candidates. Maximal degree in co-relation 26079. Up to 3831 conditions per place. [2024-06-28 00:59:38,819 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 181 selfloop transitions, 52 changer transitions 0/247 dead transitions. [2024-06-28 00:59:38,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 247 transitions, 2693 flow [2024-06-28 00:59:38,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-28 00:59:38,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6494565217391305 [2024-06-28 00:59:38,820 INFO L175 Difference]: Start difference. First operand has 201 places, 202 transitions, 2171 flow. Second operand 8 states and 239 transitions. [2024-06-28 00:59:38,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 247 transitions, 2693 flow [2024-06-28 00:59:39,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 247 transitions, 2561 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:39,126 INFO L231 Difference]: Finished difference. Result has 203 places, 201 transitions, 2063 flow [2024-06-28 00:59:39,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2063, PETRI_PLACES=203, PETRI_TRANSITIONS=201} [2024-06-28 00:59:39,127 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 153 predicate places. [2024-06-28 00:59:39,127 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 201 transitions, 2063 flow [2024-06-28 00:59:39,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:39,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:39,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:39,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:59:39,128 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:39,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:39,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1394870185, now seen corresponding path program 1 times [2024-06-28 00:59:39,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:39,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108003794] [2024-06-28 00:59:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:39,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:39,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:39,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108003794] [2024-06-28 00:59:39,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108003794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:39,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:39,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:39,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746501459] [2024-06-28 00:59:39,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:39,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:39,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:39,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:39,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:39,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:39,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 201 transitions, 2063 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:39,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:39,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:39,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:39,850 INFO L124 PetriNetUnfolderBase]: 2974/5107 cut-off events. [2024-06-28 00:59:39,851 INFO L125 PetriNetUnfolderBase]: For 115372/115375 co-relation queries the response was YES. [2024-06-28 00:59:39,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26058 conditions, 5107 events. 2974/5107 cut-off events. For 115372/115375 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34777 event pairs, 801 based on Foata normal form. 1/5091 useless extension candidates. Maximal degree in co-relation 25966. Up to 4261 conditions per place. [2024-06-28 00:59:39,895 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 190 selfloop transitions, 48 changer transitions 0/252 dead transitions. [2024-06-28 00:59:39,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 252 transitions, 2997 flow [2024-06-28 00:59:39,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-28 00:59:39,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-06-28 00:59:39,897 INFO L175 Difference]: Start difference. First operand has 203 places, 201 transitions, 2063 flow. Second operand 7 states and 209 transitions. [2024-06-28 00:59:39,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 252 transitions, 2997 flow [2024-06-28 00:59:40,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 252 transitions, 2746 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-28 00:59:40,141 INFO L231 Difference]: Finished difference. Result has 201 places, 217 transitions, 2137 flow [2024-06-28 00:59:40,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2137, PETRI_PLACES=201, PETRI_TRANSITIONS=217} [2024-06-28 00:59:40,141 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 151 predicate places. [2024-06-28 00:59:40,141 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 217 transitions, 2137 flow [2024-06-28 00:59:40,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:40,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:40,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:40,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:59:40,142 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:40,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:40,142 INFO L85 PathProgramCache]: Analyzing trace with hash -65625921, now seen corresponding path program 1 times [2024-06-28 00:59:40,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:40,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778453823] [2024-06-28 00:59:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:40,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:40,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:40,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778453823] [2024-06-28 00:59:40,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778453823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:40,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:40,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:40,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314768340] [2024-06-28 00:59:40,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:40,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:40,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:40,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:40,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:40,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:40,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 217 transitions, 2137 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:40,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:40,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:40,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:40,882 INFO L124 PetriNetUnfolderBase]: 3010/4975 cut-off events. [2024-06-28 00:59:40,882 INFO L125 PetriNetUnfolderBase]: For 117466/117469 co-relation queries the response was YES. [2024-06-28 00:59:40,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25565 conditions, 4975 events. 3010/4975 cut-off events. For 117466/117469 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33019 event pairs, 606 based on Foata normal form. 3/4964 useless extension candidates. Maximal degree in co-relation 25474. Up to 4334 conditions per place. [2024-06-28 00:59:40,928 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 204 selfloop transitions, 49 changer transitions 0/267 dead transitions. [2024-06-28 00:59:40,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 267 transitions, 3105 flow [2024-06-28 00:59:40,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-28 00:59:40,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639751552795031 [2024-06-28 00:59:40,930 INFO L175 Difference]: Start difference. First operand has 201 places, 217 transitions, 2137 flow. Second operand 7 states and 206 transitions. [2024-06-28 00:59:40,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 267 transitions, 3105 flow [2024-06-28 00:59:41,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 267 transitions, 3038 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-28 00:59:41,289 INFO L231 Difference]: Finished difference. Result has 209 places, 235 transitions, 2420 flow [2024-06-28 00:59:41,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2420, PETRI_PLACES=209, PETRI_TRANSITIONS=235} [2024-06-28 00:59:41,290 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 159 predicate places. [2024-06-28 00:59:41,290 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 235 transitions, 2420 flow [2024-06-28 00:59:41,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:41,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:41,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:41,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:59:41,291 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:41,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:41,291 INFO L85 PathProgramCache]: Analyzing trace with hash -65626107, now seen corresponding path program 2 times [2024-06-28 00:59:41,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:41,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602336279] [2024-06-28 00:59:41,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:41,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:41,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:41,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602336279] [2024-06-28 00:59:41,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602336279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:41,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:41,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:41,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492055350] [2024-06-28 00:59:41,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:41,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:41,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:41,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:41,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:41,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:41,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 235 transitions, 2420 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:41,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:41,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:41,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:42,025 INFO L124 PetriNetUnfolderBase]: 3021/4986 cut-off events. [2024-06-28 00:59:42,025 INFO L125 PetriNetUnfolderBase]: For 123414/123417 co-relation queries the response was YES. [2024-06-28 00:59:42,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26219 conditions, 4986 events. 3021/4986 cut-off events. For 123414/123417 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 33048 event pairs, 587 based on Foata normal form. 3/4981 useless extension candidates. Maximal degree in co-relation 26123. Up to 4431 conditions per place. [2024-06-28 00:59:42,073 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 219 selfloop transitions, 35 changer transitions 0/268 dead transitions. [2024-06-28 00:59:42,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 268 transitions, 3036 flow [2024-06-28 00:59:42,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:42,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:42,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-28 00:59:42,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-06-28 00:59:42,074 INFO L175 Difference]: Start difference. First operand has 209 places, 235 transitions, 2420 flow. Second operand 7 states and 201 transitions. [2024-06-28 00:59:42,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 268 transitions, 3036 flow [2024-06-28 00:59:42,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 268 transitions, 2971 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-28 00:59:42,426 INFO L231 Difference]: Finished difference. Result has 215 places, 238 transitions, 2475 flow [2024-06-28 00:59:42,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2475, PETRI_PLACES=215, PETRI_TRANSITIONS=238} [2024-06-28 00:59:42,426 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 165 predicate places. [2024-06-28 00:59:42,427 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 238 transitions, 2475 flow [2024-06-28 00:59:42,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:42,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:42,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:42,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:59:42,428 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:42,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:42,428 INFO L85 PathProgramCache]: Analyzing trace with hash -260469609, now seen corresponding path program 3 times [2024-06-28 00:59:42,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:42,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722485628] [2024-06-28 00:59:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:42,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:42,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:42,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722485628] [2024-06-28 00:59:42,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722485628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:42,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:42,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:42,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972815700] [2024-06-28 00:59:42,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:42,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:42,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:42,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:42,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:42,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:42,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 238 transitions, 2475 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:42,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:42,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:42,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:43,243 INFO L124 PetriNetUnfolderBase]: 3068/5246 cut-off events. [2024-06-28 00:59:43,243 INFO L125 PetriNetUnfolderBase]: For 130481/130484 co-relation queries the response was YES. [2024-06-28 00:59:43,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27119 conditions, 5246 events. 3068/5246 cut-off events. For 130481/130484 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35816 event pairs, 773 based on Foata normal form. 3/5237 useless extension candidates. Maximal degree in co-relation 27021. Up to 4474 conditions per place. [2024-06-28 00:59:43,285 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 220 selfloop transitions, 48 changer transitions 0/282 dead transitions. [2024-06-28 00:59:43,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 282 transitions, 3365 flow [2024-06-28 00:59:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:59:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:59:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-28 00:59:43,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059782608695652 [2024-06-28 00:59:43,286 INFO L175 Difference]: Start difference. First operand has 215 places, 238 transitions, 2475 flow. Second operand 8 states and 223 transitions. [2024-06-28 00:59:43,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 282 transitions, 3365 flow [2024-06-28 00:59:43,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 282 transitions, 3249 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:43,641 INFO L231 Difference]: Finished difference. Result has 218 places, 251 transitions, 2665 flow [2024-06-28 00:59:43,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2375, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2665, PETRI_PLACES=218, PETRI_TRANSITIONS=251} [2024-06-28 00:59:43,642 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 168 predicate places. [2024-06-28 00:59:43,642 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 251 transitions, 2665 flow [2024-06-28 00:59:43,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:43,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:43,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:43,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:59:43,643 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:43,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:43,643 INFO L85 PathProgramCache]: Analyzing trace with hash -260232273, now seen corresponding path program 2 times [2024-06-28 00:59:43,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:43,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38962676] [2024-06-28 00:59:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:43,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:43,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:43,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38962676] [2024-06-28 00:59:43,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38962676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:43,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:43,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:43,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509708677] [2024-06-28 00:59:43,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:43,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:43,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:43,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:43,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:43,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:43,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 251 transitions, 2665 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:43,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:43,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:43,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:44,374 INFO L124 PetriNetUnfolderBase]: 3107/5304 cut-off events. [2024-06-28 00:59:44,374 INFO L125 PetriNetUnfolderBase]: For 137923/137926 co-relation queries the response was YES. [2024-06-28 00:59:44,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27720 conditions, 5304 events. 3107/5304 cut-off events. For 137923/137926 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 36186 event pairs, 783 based on Foata normal form. 3/5293 useless extension candidates. Maximal degree in co-relation 27621. Up to 4441 conditions per place. [2024-06-28 00:59:44,424 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 212 selfloop transitions, 63 changer transitions 0/289 dead transitions. [2024-06-28 00:59:44,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 289 transitions, 3618 flow [2024-06-28 00:59:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:44,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-28 00:59:44,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-28 00:59:44,425 INFO L175 Difference]: Start difference. First operand has 218 places, 251 transitions, 2665 flow. Second operand 7 states and 203 transitions. [2024-06-28 00:59:44,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 289 transitions, 3618 flow [2024-06-28 00:59:44,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 289 transitions, 3511 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-28 00:59:44,836 INFO L231 Difference]: Finished difference. Result has 223 places, 260 transitions, 2823 flow [2024-06-28 00:59:44,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2558, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2823, PETRI_PLACES=223, PETRI_TRANSITIONS=260} [2024-06-28 00:59:44,836 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 173 predicate places. [2024-06-28 00:59:44,836 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 260 transitions, 2823 flow [2024-06-28 00:59:44,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:44,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:44,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:44,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:59:44,837 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:44,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:44,837 INFO L85 PathProgramCache]: Analyzing trace with hash -260469423, now seen corresponding path program 3 times [2024-06-28 00:59:44,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:44,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186993161] [2024-06-28 00:59:44,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:44,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:44,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:44,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186993161] [2024-06-28 00:59:44,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186993161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:44,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:44,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:44,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505896993] [2024-06-28 00:59:44,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:44,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:44,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:44,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:44,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:44,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:44,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 260 transitions, 2823 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:44,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:44,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:44,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:45,712 INFO L124 PetriNetUnfolderBase]: 3104/5115 cut-off events. [2024-06-28 00:59:45,713 INFO L125 PetriNetUnfolderBase]: For 140253/140256 co-relation queries the response was YES. [2024-06-28 00:59:45,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27561 conditions, 5115 events. 3104/5115 cut-off events. For 140253/140256 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 33967 event pairs, 596 based on Foata normal form. 3/5108 useless extension candidates. Maximal degree in co-relation 27461. Up to 4438 conditions per place. [2024-06-28 00:59:45,765 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 214 selfloop transitions, 61 changer transitions 0/289 dead transitions. [2024-06-28 00:59:45,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 289 transitions, 3647 flow [2024-06-28 00:59:45,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:45,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-28 00:59:45,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-06-28 00:59:45,771 INFO L175 Difference]: Start difference. First operand has 223 places, 260 transitions, 2823 flow. Second operand 7 states and 204 transitions. [2024-06-28 00:59:45,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 289 transitions, 3647 flow [2024-06-28 00:59:46,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 289 transitions, 3517 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:46,326 INFO L231 Difference]: Finished difference. Result has 227 places, 260 transitions, 2821 flow [2024-06-28 00:59:46,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2821, PETRI_PLACES=227, PETRI_TRANSITIONS=260} [2024-06-28 00:59:46,326 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 177 predicate places. [2024-06-28 00:59:46,327 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 260 transitions, 2821 flow [2024-06-28 00:59:46,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:46,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:46,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:46,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:59:46,331 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:46,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:46,333 INFO L85 PathProgramCache]: Analyzing trace with hash -260223345, now seen corresponding path program 1 times [2024-06-28 00:59:46,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:46,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528399218] [2024-06-28 00:59:46,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:46,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:46,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:46,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528399218] [2024-06-28 00:59:46,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528399218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:46,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:46,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:46,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895745654] [2024-06-28 00:59:46,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:46,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:46,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:46,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:46,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:46,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 00:59:46,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 260 transitions, 2821 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:46,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:46,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 00:59:46,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:47,135 INFO L124 PetriNetUnfolderBase]: 3038/5027 cut-off events. [2024-06-28 00:59:47,136 INFO L125 PetriNetUnfolderBase]: For 157587/157587 co-relation queries the response was YES. [2024-06-28 00:59:47,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27297 conditions, 5027 events. 3038/5027 cut-off events. For 157587/157587 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 33448 event pairs, 558 based on Foata normal form. 10/4989 useless extension candidates. Maximal degree in co-relation 27196. Up to 4225 conditions per place. [2024-06-28 00:59:47,184 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 211 selfloop transitions, 37 changer transitions 0/292 dead transitions. [2024-06-28 00:59:47,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 292 transitions, 3421 flow [2024-06-28 00:59:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-28 00:59:47,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-28 00:59:47,186 INFO L175 Difference]: Start difference. First operand has 227 places, 260 transitions, 2821 flow. Second operand 7 states and 205 transitions. [2024-06-28 00:59:47,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 292 transitions, 3421 flow [2024-06-28 00:59:47,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 292 transitions, 3300 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:47,586 INFO L231 Difference]: Finished difference. Result has 230 places, 261 transitions, 2794 flow [2024-06-28 00:59:47,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2794, PETRI_PLACES=230, PETRI_TRANSITIONS=261} [2024-06-28 00:59:47,587 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 180 predicate places. [2024-06-28 00:59:47,587 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 261 transitions, 2794 flow [2024-06-28 00:59:47,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:47,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:47,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:47,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:59:47,588 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:47,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:47,588 INFO L85 PathProgramCache]: Analyzing trace with hash 73674753, now seen corresponding path program 4 times [2024-06-28 00:59:47,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:47,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865215772] [2024-06-28 00:59:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:47,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:47,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:47,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865215772] [2024-06-28 00:59:47,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865215772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:47,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:47,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:47,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927570246] [2024-06-28 00:59:47,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:47,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:47,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:47,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:47,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:47,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:47,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 261 transitions, 2794 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:47,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:47,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:47,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:48,363 INFO L124 PetriNetUnfolderBase]: 3211/5512 cut-off events. [2024-06-28 00:59:48,364 INFO L125 PetriNetUnfolderBase]: For 153799/153799 co-relation queries the response was YES. [2024-06-28 00:59:48,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28820 conditions, 5512 events. 3211/5512 cut-off events. For 153799/153799 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38072 event pairs, 733 based on Foata normal form. 1/5502 useless extension candidates. Maximal degree in co-relation 28718. Up to 4556 conditions per place. [2024-06-28 00:59:48,549 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 210 selfloop transitions, 75 changer transitions 0/299 dead transitions. [2024-06-28 00:59:48,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 299 transitions, 3758 flow [2024-06-28 00:59:48,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:48,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-28 00:59:48,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-28 00:59:48,569 INFO L175 Difference]: Start difference. First operand has 230 places, 261 transitions, 2794 flow. Second operand 7 states and 205 transitions. [2024-06-28 00:59:48,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 299 transitions, 3758 flow [2024-06-28 00:59:49,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 299 transitions, 3684 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 00:59:49,072 INFO L231 Difference]: Finished difference. Result has 232 places, 267 transitions, 2980 flow [2024-06-28 00:59:49,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2980, PETRI_PLACES=232, PETRI_TRANSITIONS=267} [2024-06-28 00:59:49,073 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 182 predicate places. [2024-06-28 00:59:49,073 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 267 transitions, 2980 flow [2024-06-28 00:59:49,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:49,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:49,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:49,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:59:49,073 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:49,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:49,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1228594817, now seen corresponding path program 5 times [2024-06-28 00:59:49,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:49,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507313221] [2024-06-28 00:59:49,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:49,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:49,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:49,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507313221] [2024-06-28 00:59:49,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507313221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:49,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:49,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:49,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030736056] [2024-06-28 00:59:49,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:49,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:49,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:49,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:49,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:49,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:49,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 267 transitions, 2980 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:49,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:49,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:49,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:49,867 INFO L124 PetriNetUnfolderBase]: 3236/5554 cut-off events. [2024-06-28 00:59:49,867 INFO L125 PetriNetUnfolderBase]: For 160890/160890 co-relation queries the response was YES. [2024-06-28 00:59:49,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29387 conditions, 5554 events. 3236/5554 cut-off events. For 160890/160890 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 38362 event pairs, 735 based on Foata normal form. 1/5544 useless extension candidates. Maximal degree in co-relation 29284. Up to 4583 conditions per place. [2024-06-28 00:59:49,919 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 207 selfloop transitions, 82 changer transitions 0/303 dead transitions. [2024-06-28 00:59:49,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 303 transitions, 3973 flow [2024-06-28 00:59:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-28 00:59:49,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-06-28 00:59:49,920 INFO L175 Difference]: Start difference. First operand has 232 places, 267 transitions, 2980 flow. Second operand 7 states and 202 transitions. [2024-06-28 00:59:49,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 303 transitions, 3973 flow [2024-06-28 00:59:50,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 303 transitions, 3775 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:50,316 INFO L231 Difference]: Finished difference. Result has 236 places, 274 transitions, 3081 flow [2024-06-28 00:59:50,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3081, PETRI_PLACES=236, PETRI_TRANSITIONS=274} [2024-06-28 00:59:50,317 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 186 predicate places. [2024-06-28 00:59:50,317 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 274 transitions, 3081 flow [2024-06-28 00:59:50,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:50,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:50,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:50,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:59:50,317 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:50,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:50,318 INFO L85 PathProgramCache]: Analyzing trace with hash 959714147, now seen corresponding path program 6 times [2024-06-28 00:59:50,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:50,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804569649] [2024-06-28 00:59:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:50,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:50,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:50,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804569649] [2024-06-28 00:59:50,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804569649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:50,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:50,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:50,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780912808] [2024-06-28 00:59:50,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:50,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:50,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:50,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:50,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:50,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:50,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 274 transitions, 3081 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:50,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:50,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:50,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:51,200 INFO L124 PetriNetUnfolderBase]: 3233/5309 cut-off events. [2024-06-28 00:59:51,202 INFO L125 PetriNetUnfolderBase]: For 162359/162359 co-relation queries the response was YES. [2024-06-28 00:59:51,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29011 conditions, 5309 events. 3233/5309 cut-off events. For 162359/162359 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 35443 event pairs, 604 based on Foata normal form. 1/5303 useless extension candidates. Maximal degree in co-relation 28907. Up to 4580 conditions per place. [2024-06-28 00:59:51,266 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 215 selfloop transitions, 78 changer transitions 0/307 dead transitions. [2024-06-28 00:59:51,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 307 transitions, 4079 flow [2024-06-28 00:59:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:51,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-28 00:59:51,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-28 00:59:51,277 INFO L175 Difference]: Start difference. First operand has 236 places, 274 transitions, 3081 flow. Second operand 7 states and 207 transitions. [2024-06-28 00:59:51,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 307 transitions, 4079 flow [2024-06-28 00:59:51,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 307 transitions, 3919 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-28 00:59:51,881 INFO L231 Difference]: Finished difference. Result has 240 places, 274 transitions, 3083 flow [2024-06-28 00:59:51,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3083, PETRI_PLACES=240, PETRI_TRANSITIONS=274} [2024-06-28 00:59:51,882 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 190 predicate places. [2024-06-28 00:59:51,882 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 274 transitions, 3083 flow [2024-06-28 00:59:51,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:51,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:51,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:51,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:59:51,882 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:51,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:51,883 INFO L85 PathProgramCache]: Analyzing trace with hash -182705601, now seen corresponding path program 4 times [2024-06-28 00:59:51,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:51,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126834377] [2024-06-28 00:59:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:51,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:51,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:51,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126834377] [2024-06-28 00:59:51,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126834377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:51,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:51,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:51,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988595880] [2024-06-28 00:59:51,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:51,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:51,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:51,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:51,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:52,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:52,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 274 transitions, 3083 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:52,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:52,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:52,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:52,695 INFO L124 PetriNetUnfolderBase]: 3230/5507 cut-off events. [2024-06-28 00:59:52,696 INFO L125 PetriNetUnfolderBase]: For 167653/167653 co-relation queries the response was YES. [2024-06-28 00:59:52,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29168 conditions, 5507 events. 3230/5507 cut-off events. For 167653/167653 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 37946 event pairs, 758 based on Foata normal form. 1/5493 useless extension candidates. Maximal degree in co-relation 29063. Up to 4621 conditions per place. [2024-06-28 00:59:52,746 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 226 selfloop transitions, 65 changer transitions 0/305 dead transitions. [2024-06-28 00:59:52,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 305 transitions, 3994 flow [2024-06-28 00:59:52,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-28 00:59:52,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-28 00:59:52,747 INFO L175 Difference]: Start difference. First operand has 240 places, 274 transitions, 3083 flow. Second operand 7 states and 203 transitions. [2024-06-28 00:59:52,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 305 transitions, 3994 flow [2024-06-28 00:59:53,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 305 transitions, 3822 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 00:59:53,270 INFO L231 Difference]: Finished difference. Result has 243 places, 276 transitions, 3082 flow [2024-06-28 00:59:53,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3082, PETRI_PLACES=243, PETRI_TRANSITIONS=276} [2024-06-28 00:59:53,271 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 193 predicate places. [2024-06-28 00:59:53,271 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 276 transitions, 3082 flow [2024-06-28 00:59:53,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:53,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:53,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:53,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:59:53,272 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:53,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:53,272 INFO L85 PathProgramCache]: Analyzing trace with hash 614618165, now seen corresponding path program 7 times [2024-06-28 00:59:53,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:53,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740964644] [2024-06-28 00:59:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:53,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:53,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:53,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740964644] [2024-06-28 00:59:53,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740964644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:53,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:53,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:53,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846020152] [2024-06-28 00:59:53,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:53,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:53,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:53,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:53,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:53,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:53,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 276 transitions, 3082 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:53,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:53,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:53,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:54,077 INFO L124 PetriNetUnfolderBase]: 3227/5496 cut-off events. [2024-06-28 00:59:54,078 INFO L125 PetriNetUnfolderBase]: For 170159/170159 co-relation queries the response was YES. [2024-06-28 00:59:54,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29039 conditions, 5496 events. 3227/5496 cut-off events. For 170159/170159 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 37782 event pairs, 744 based on Foata normal form. 1/5484 useless extension candidates. Maximal degree in co-relation 28933. Up to 4716 conditions per place. [2024-06-28 00:59:54,128 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 247 selfloop transitions, 42 changer transitions 0/303 dead transitions. [2024-06-28 00:59:54,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 303 transitions, 3722 flow [2024-06-28 00:59:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:54,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-28 00:59:54,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149068322981367 [2024-06-28 00:59:54,129 INFO L175 Difference]: Start difference. First operand has 243 places, 276 transitions, 3082 flow. Second operand 7 states and 198 transitions. [2024-06-28 00:59:54,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 303 transitions, 3722 flow [2024-06-28 00:59:54,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 303 transitions, 3598 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-28 00:59:54,674 INFO L231 Difference]: Finished difference. Result has 248 places, 276 transitions, 3048 flow [2024-06-28 00:59:54,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3048, PETRI_PLACES=248, PETRI_TRANSITIONS=276} [2024-06-28 00:59:54,674 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 198 predicate places. [2024-06-28 00:59:54,675 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 276 transitions, 3048 flow [2024-06-28 00:59:54,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:54,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:54,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:54,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:59:54,675 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:54,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:54,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1343885987, now seen corresponding path program 8 times [2024-06-28 00:59:54,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:54,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358363901] [2024-06-28 00:59:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:54,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:54,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:54,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358363901] [2024-06-28 00:59:54,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358363901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:54,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:54,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:54,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823671946] [2024-06-28 00:59:54,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:54,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:54,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:54,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:54,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:54,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:54,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 276 transitions, 3048 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:54,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:54,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:54,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:55,490 INFO L124 PetriNetUnfolderBase]: 3263/5549 cut-off events. [2024-06-28 00:59:55,491 INFO L125 PetriNetUnfolderBase]: For 177330/177330 co-relation queries the response was YES. [2024-06-28 00:59:55,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29397 conditions, 5549 events. 3263/5549 cut-off events. For 177330/177330 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 38138 event pairs, 742 based on Foata normal form. 1/5539 useless extension candidates. Maximal degree in co-relation 29289. Up to 4733 conditions per place. [2024-06-28 00:59:55,539 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 241 selfloop transitions, 57 changer transitions 0/312 dead transitions. [2024-06-28 00:59:55,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 312 transitions, 3977 flow [2024-06-28 00:59:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-28 00:59:55,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2024-06-28 00:59:55,540 INFO L175 Difference]: Start difference. First operand has 248 places, 276 transitions, 3048 flow. Second operand 7 states and 197 transitions. [2024-06-28 00:59:55,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 312 transitions, 3977 flow [2024-06-28 00:59:56,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 312 transitions, 3879 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:59:56,113 INFO L231 Difference]: Finished difference. Result has 250 places, 287 transitions, 3259 flow [2024-06-28 00:59:56,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3259, PETRI_PLACES=250, PETRI_TRANSITIONS=287} [2024-06-28 00:59:56,113 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 200 predicate places. [2024-06-28 00:59:56,114 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 287 transitions, 3259 flow [2024-06-28 00:59:56,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:56,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:56,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:56,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:59:56,114 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:56,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:56,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1343619077, now seen corresponding path program 9 times [2024-06-28 00:59:56,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:56,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392222333] [2024-06-28 00:59:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:56,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:56,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:56,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392222333] [2024-06-28 00:59:56,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392222333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:56,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:56,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:56,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061117212] [2024-06-28 00:59:56,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:56,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:56,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:56,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:56,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:56,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:56,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 287 transitions, 3259 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:56,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:56,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:56,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:56,944 INFO L124 PetriNetUnfolderBase]: 3260/5358 cut-off events. [2024-06-28 00:59:56,944 INFO L125 PetriNetUnfolderBase]: For 179219/179219 co-relation queries the response was YES. [2024-06-28 00:59:56,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29342 conditions, 5358 events. 3260/5358 cut-off events. For 179219/179219 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 35868 event pairs, 604 based on Foata normal form. 1/5352 useless extension candidates. Maximal degree in co-relation 29232. Up to 4730 conditions per place. [2024-06-28 00:59:56,995 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 245 selfloop transitions, 58 changer transitions 0/317 dead transitions. [2024-06-28 00:59:56,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 317 transitions, 3931 flow [2024-06-28 00:59:56,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:59:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:59:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-28 00:59:56,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5893719806763285 [2024-06-28 00:59:56,997 INFO L175 Difference]: Start difference. First operand has 250 places, 287 transitions, 3259 flow. Second operand 9 states and 244 transitions. [2024-06-28 00:59:56,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 317 transitions, 3931 flow [2024-06-28 00:59:57,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 317 transitions, 3813 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-28 00:59:57,649 INFO L231 Difference]: Finished difference. Result has 257 places, 287 transitions, 3263 flow [2024-06-28 00:59:57,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3141, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3263, PETRI_PLACES=257, PETRI_TRANSITIONS=287} [2024-06-28 00:59:57,650 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 207 predicate places. [2024-06-28 00:59:57,650 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 287 transitions, 3263 flow [2024-06-28 00:59:57,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:57,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:57,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:57,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:59:57,651 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:57,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:57,651 INFO L85 PathProgramCache]: Analyzing trace with hash 201524829, now seen corresponding path program 5 times [2024-06-28 00:59:57,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:57,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241646131] [2024-06-28 00:59:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:57,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:57,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:57,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241646131] [2024-06-28 00:59:57,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241646131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:57,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:57,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:57,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182785438] [2024-06-28 00:59:57,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:57,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:57,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:57,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:57,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:57,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:57,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 287 transitions, 3263 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:57,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:57,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:57,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:58,492 INFO L124 PetriNetUnfolderBase]: 3271/5517 cut-off events. [2024-06-28 00:59:58,493 INFO L125 PetriNetUnfolderBase]: For 185323/185323 co-relation queries the response was YES. [2024-06-28 00:59:58,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29633 conditions, 5517 events. 3271/5517 cut-off events. For 185323/185323 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 37796 event pairs, 1033 based on Foata normal form. 1/5486 useless extension candidates. Maximal degree in co-relation 29522. Up to 4849 conditions per place. [2024-06-28 00:59:58,546 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 275 selfloop transitions, 25 changer transitions 0/314 dead transitions. [2024-06-28 00:59:58,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 314 transitions, 3968 flow [2024-06-28 00:59:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:59:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:59:58,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-28 00:59:58,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-06-28 00:59:58,548 INFO L175 Difference]: Start difference. First operand has 257 places, 287 transitions, 3263 flow. Second operand 7 states and 194 transitions. [2024-06-28 00:59:58,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 314 transitions, 3968 flow [2024-06-28 00:59:59,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 314 transitions, 3840 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 00:59:59,202 INFO L231 Difference]: Finished difference. Result has 257 places, 290 transitions, 3248 flow [2024-06-28 00:59:59,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3135, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3248, PETRI_PLACES=257, PETRI_TRANSITIONS=290} [2024-06-28 00:59:59,202 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 207 predicate places. [2024-06-28 00:59:59,202 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 290 transitions, 3248 flow [2024-06-28 00:59:59,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:59,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:59:59,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:59:59,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:59:59,203 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:59:59,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:59:59,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1343619263, now seen corresponding path program 6 times [2024-06-28 00:59:59,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:59:59,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436925129] [2024-06-28 00:59:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:59:59,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:59:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:59:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:59:59,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:59:59,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436925129] [2024-06-28 00:59:59,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436925129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:59:59,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:59:59,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:59:59,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797781706] [2024-06-28 00:59:59,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:59:59,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:59:59,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:59:59,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:59:59,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:59:59,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 00:59:59,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 290 transitions, 3248 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:59:59,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:59:59,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 00:59:59,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:59:59,983 INFO L124 PetriNetUnfolderBase]: 3282/5400 cut-off events. [2024-06-28 00:59:59,983 INFO L125 PetriNetUnfolderBase]: For 189638/189638 co-relation queries the response was YES. [2024-06-28 01:00:00,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29563 conditions, 5400 events. 3282/5400 cut-off events. For 189638/189638 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 36304 event pairs, 616 based on Foata normal form. 1/5390 useless extension candidates. Maximal degree in co-relation 29452. Up to 4679 conditions per place. [2024-06-28 01:00:00,037 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 232 selfloop transitions, 72 changer transitions 0/318 dead transitions. [2024-06-28 01:00:00,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 318 transitions, 4093 flow [2024-06-28 01:00:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:00:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:00:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-28 01:00:00,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-06-28 01:00:00,039 INFO L175 Difference]: Start difference. First operand has 257 places, 290 transitions, 3248 flow. Second operand 7 states and 200 transitions. [2024-06-28 01:00:00,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 318 transitions, 4093 flow [2024-06-28 01:00:00,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 318 transitions, 4003 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 01:00:00,581 INFO L231 Difference]: Finished difference. Result has 259 places, 293 transitions, 3365 flow [2024-06-28 01:00:00,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3158, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3365, PETRI_PLACES=259, PETRI_TRANSITIONS=293} [2024-06-28 01:00:00,582 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 209 predicate places. [2024-06-28 01:00:00,582 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 293 transitions, 3365 flow [2024-06-28 01:00:00,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:00,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:00,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:00,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 01:00:00,583 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:00,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:00,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1921206627, now seen corresponding path program 10 times [2024-06-28 01:00:00,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:00,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131523094] [2024-06-28 01:00:00,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:00,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:00,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:00,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131523094] [2024-06-28 01:00:00,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131523094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:00,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:00,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:00,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092000437] [2024-06-28 01:00:00,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:00,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:00,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:00,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:00,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:00,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:00,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 293 transitions, 3365 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:00,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:00,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:00,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:01,474 INFO L124 PetriNetUnfolderBase]: 3279/5638 cut-off events. [2024-06-28 01:00:01,474 INFO L125 PetriNetUnfolderBase]: For 195211/195211 co-relation queries the response was YES. [2024-06-28 01:00:01,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29951 conditions, 5638 events. 3279/5638 cut-off events. For 195211/195211 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 39234 event pairs, 738 based on Foata normal form. 1/5628 useless extension candidates. Maximal degree in co-relation 29839. Up to 4667 conditions per place. [2024-06-28 01:00:01,526 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 226 selfloop transitions, 81 changer transitions 0/321 dead transitions. [2024-06-28 01:00:01,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 321 transitions, 4171 flow [2024-06-28 01:00:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:00:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:00:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 01:00:01,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-28 01:00:01,527 INFO L175 Difference]: Start difference. First operand has 259 places, 293 transitions, 3365 flow. Second operand 6 states and 180 transitions. [2024-06-28 01:00:01,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 321 transitions, 4171 flow [2024-06-28 01:00:02,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 321 transitions, 4013 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-28 01:00:02,214 INFO L231 Difference]: Finished difference. Result has 261 places, 293 transitions, 3383 flow [2024-06-28 01:00:02,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3207, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3383, PETRI_PLACES=261, PETRI_TRANSITIONS=293} [2024-06-28 01:00:02,215 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 211 predicate places. [2024-06-28 01:00:02,215 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 293 transitions, 3383 flow [2024-06-28 01:00:02,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:02,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:02,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:02,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 01:00:02,216 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:02,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:02,216 INFO L85 PathProgramCache]: Analyzing trace with hash -911732981, now seen corresponding path program 7 times [2024-06-28 01:00:02,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:02,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184950452] [2024-06-28 01:00:02,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:02,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:02,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:02,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184950452] [2024-06-28 01:00:02,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184950452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:02,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:02,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:02,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733440671] [2024-06-28 01:00:02,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:02,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:02,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:02,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:02,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:02,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:02,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 293 transitions, 3383 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:02,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:02,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:02,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:03,078 INFO L124 PetriNetUnfolderBase]: 3304/5458 cut-off events. [2024-06-28 01:00:03,079 INFO L125 PetriNetUnfolderBase]: For 202706/202709 co-relation queries the response was YES. [2024-06-28 01:00:03,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30178 conditions, 5458 events. 3304/5458 cut-off events. For 202706/202709 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 36893 event pairs, 614 based on Foata normal form. 3/5444 useless extension candidates. Maximal degree in co-relation 30065. Up to 4771 conditions per place. [2024-06-28 01:00:03,133 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 252 selfloop transitions, 59 changer transitions 0/325 dead transitions. [2024-06-28 01:00:03,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 325 transitions, 4314 flow [2024-06-28 01:00:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:00:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:00:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-28 01:00:03,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6826086956521739 [2024-06-28 01:00:03,135 INFO L175 Difference]: Start difference. First operand has 261 places, 293 transitions, 3383 flow. Second operand 5 states and 157 transitions. [2024-06-28 01:00:03,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 325 transitions, 4314 flow [2024-06-28 01:00:03,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 325 transitions, 4130 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 01:00:03,822 INFO L231 Difference]: Finished difference. Result has 261 places, 300 transitions, 3512 flow [2024-06-28 01:00:03,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3203, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3512, PETRI_PLACES=261, PETRI_TRANSITIONS=300} [2024-06-28 01:00:03,822 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 211 predicate places. [2024-06-28 01:00:03,822 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 300 transitions, 3512 flow [2024-06-28 01:00:03,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:03,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:03,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:03,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 01:00:03,823 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:03,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:03,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1876393691, now seen corresponding path program 8 times [2024-06-28 01:00:03,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:03,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549210901] [2024-06-28 01:00:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:03,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:03,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:03,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549210901] [2024-06-28 01:00:03,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549210901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:03,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:03,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:03,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947330017] [2024-06-28 01:00:03,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:03,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:03,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:03,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:03,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:03,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:03,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 300 transitions, 3512 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:03,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:03,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:03,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:04,765 INFO L124 PetriNetUnfolderBase]: 3326/5467 cut-off events. [2024-06-28 01:00:04,766 INFO L125 PetriNetUnfolderBase]: For 196386/196386 co-relation queries the response was YES. [2024-06-28 01:00:04,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30412 conditions, 5467 events. 3326/5467 cut-off events. For 196386/196386 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 36816 event pairs, 592 based on Foata normal form. 1/5464 useless extension candidates. Maximal degree in co-relation 30298. Up to 4914 conditions per place. [2024-06-28 01:00:04,817 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 282 selfloop transitions, 31 changer transitions 0/327 dead transitions. [2024-06-28 01:00:04,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 327 transitions, 4290 flow [2024-06-28 01:00:04,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:00:04,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:00:04,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-28 01:00:04,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159420289855072 [2024-06-28 01:00:04,822 INFO L175 Difference]: Start difference. First operand has 261 places, 300 transitions, 3512 flow. Second operand 6 states and 170 transitions. [2024-06-28 01:00:04,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 327 transitions, 4290 flow [2024-06-28 01:00:05,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 327 transitions, 4182 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 01:00:05,713 INFO L231 Difference]: Finished difference. Result has 264 places, 306 transitions, 3586 flow [2024-06-28 01:00:05,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3586, PETRI_PLACES=264, PETRI_TRANSITIONS=306} [2024-06-28 01:00:05,713 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 214 predicate places. [2024-06-28 01:00:05,713 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 306 transitions, 3586 flow [2024-06-28 01:00:05,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:05,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:05,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:05,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 01:00:05,714 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:05,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:05,714 INFO L85 PathProgramCache]: Analyzing trace with hash 704541411, now seen corresponding path program 11 times [2024-06-28 01:00:05,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:05,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470670433] [2024-06-28 01:00:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:05,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:05,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:05,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470670433] [2024-06-28 01:00:05,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470670433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:05,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:05,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:05,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7328554] [2024-06-28 01:00:05,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:05,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:05,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:05,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:05,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:05,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 306 transitions, 3586 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:05,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:05,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:05,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:06,638 INFO L124 PetriNetUnfolderBase]: 3323/5717 cut-off events. [2024-06-28 01:00:06,638 INFO L125 PetriNetUnfolderBase]: For 197143/197143 co-relation queries the response was YES. [2024-06-28 01:00:06,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30432 conditions, 5717 events. 3323/5717 cut-off events. For 197143/197143 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 39864 event pairs, 731 based on Foata normal form. 1/5709 useless extension candidates. Maximal degree in co-relation 30318. Up to 4728 conditions per place. [2024-06-28 01:00:06,699 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 248 selfloop transitions, 84 changer transitions 0/346 dead transitions. [2024-06-28 01:00:06,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 346 transitions, 4470 flow [2024-06-28 01:00:06,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-28 01:00:06,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-28 01:00:06,701 INFO L175 Difference]: Start difference. First operand has 264 places, 306 transitions, 3586 flow. Second operand 8 states and 236 transitions. [2024-06-28 01:00:06,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 346 transitions, 4470 flow [2024-06-28 01:00:07,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 346 transitions, 4384 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-28 01:00:07,437 INFO L231 Difference]: Finished difference. Result has 270 places, 306 transitions, 3686 flow [2024-06-28 01:00:07,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3686, PETRI_PLACES=270, PETRI_TRANSITIONS=306} [2024-06-28 01:00:07,438 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 220 predicate places. [2024-06-28 01:00:07,438 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 306 transitions, 3686 flow [2024-06-28 01:00:07,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:07,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:07,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:07,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 01:00:07,438 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:07,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:07,439 INFO L85 PathProgramCache]: Analyzing trace with hash -911553491, now seen corresponding path program 9 times [2024-06-28 01:00:07,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:07,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590345368] [2024-06-28 01:00:07,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:07,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:07,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:07,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590345368] [2024-06-28 01:00:07,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590345368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:07,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:07,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:07,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45948294] [2024-06-28 01:00:07,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:07,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:07,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:07,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:07,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:07,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:07,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 306 transitions, 3686 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:07,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:07,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:07,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:08,504 INFO L124 PetriNetUnfolderBase]: 3320/5451 cut-off events. [2024-06-28 01:00:08,505 INFO L125 PetriNetUnfolderBase]: For 198299/198299 co-relation queries the response was YES. [2024-06-28 01:00:08,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30384 conditions, 5451 events. 3320/5451 cut-off events. For 198299/198299 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 36622 event pairs, 586 based on Foata normal form. 1/5448 useless extension candidates. Maximal degree in co-relation 30269. Up to 4784 conditions per place. [2024-06-28 01:00:08,565 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 260 selfloop transitions, 68 changer transitions 0/342 dead transitions. [2024-06-28 01:00:08,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 342 transitions, 4428 flow [2024-06-28 01:00:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:00:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:00:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-28 01:00:08,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583850931677019 [2024-06-28 01:00:08,567 INFO L175 Difference]: Start difference. First operand has 270 places, 306 transitions, 3686 flow. Second operand 7 states and 212 transitions. [2024-06-28 01:00:08,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 342 transitions, 4428 flow [2024-06-28 01:00:09,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 342 transitions, 4206 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-28 01:00:09,367 INFO L231 Difference]: Finished difference. Result has 267 places, 306 transitions, 3628 flow [2024-06-28 01:00:09,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3464, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3628, PETRI_PLACES=267, PETRI_TRANSITIONS=306} [2024-06-28 01:00:09,368 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-06-28 01:00:09,368 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 306 transitions, 3628 flow [2024-06-28 01:00:09,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:09,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:09,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:09,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 01:00:09,369 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:09,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:09,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1920939903, now seen corresponding path program 10 times [2024-06-28 01:00:09,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:09,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419449291] [2024-06-28 01:00:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:09,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:09,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:09,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419449291] [2024-06-28 01:00:09,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419449291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:09,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:09,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:09,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311532325] [2024-06-28 01:00:09,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:09,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:09,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:09,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:09,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:09,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:09,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 306 transitions, 3628 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:09,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:09,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:09,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:10,284 INFO L124 PetriNetUnfolderBase]: 3317/5658 cut-off events. [2024-06-28 01:00:10,284 INFO L125 PetriNetUnfolderBase]: For 189227/189227 co-relation queries the response was YES. [2024-06-28 01:00:10,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30230 conditions, 5658 events. 3317/5658 cut-off events. For 189227/189227 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 39219 event pairs, 759 based on Foata normal form. 1/5642 useless extension candidates. Maximal degree in co-relation 30117. Up to 4712 conditions per place. [2024-06-28 01:00:10,339 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 230 selfloop transitions, 87 changer transitions 0/331 dead transitions. [2024-06-28 01:00:10,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 331 transitions, 4444 flow [2024-06-28 01:00:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:00:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:00:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-28 01:00:10,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-06-28 01:00:10,340 INFO L175 Difference]: Start difference. First operand has 267 places, 306 transitions, 3628 flow. Second operand 6 states and 178 transitions. [2024-06-28 01:00:10,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 331 transitions, 4444 flow [2024-06-28 01:00:10,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 331 transitions, 4266 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 01:00:10,888 INFO L231 Difference]: Finished difference. Result has 267 places, 306 transitions, 3642 flow [2024-06-28 01:00:10,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3642, PETRI_PLACES=267, PETRI_TRANSITIONS=306} [2024-06-28 01:00:10,890 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-06-28 01:00:10,890 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 306 transitions, 3642 flow [2024-06-28 01:00:10,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:10,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:10,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:10,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 01:00:10,891 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:10,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:10,891 INFO L85 PathProgramCache]: Analyzing trace with hash 494320095, now seen corresponding path program 12 times [2024-06-28 01:00:10,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:10,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720660126] [2024-06-28 01:00:10,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:10,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:10,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:10,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720660126] [2024-06-28 01:00:10,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720660126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:10,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:10,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:10,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591905385] [2024-06-28 01:00:10,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:10,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:10,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:10,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:10,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:11,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:11,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 306 transitions, 3642 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:11,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:11,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:11,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:11,785 INFO L124 PetriNetUnfolderBase]: 3314/5464 cut-off events. [2024-06-28 01:00:11,786 INFO L125 PetriNetUnfolderBase]: For 179082/179085 co-relation queries the response was YES. [2024-06-28 01:00:11,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29886 conditions, 5464 events. 3314/5464 cut-off events. For 179082/179085 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 36901 event pairs, 601 based on Foata normal form. 3/5461 useless extension candidates. Maximal degree in co-relation 29773. Up to 4717 conditions per place. [2024-06-28 01:00:11,838 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 250 selfloop transitions, 84 changer transitions 0/348 dead transitions. [2024-06-28 01:00:11,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 348 transitions, 4410 flow [2024-06-28 01:00:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-28 01:00:11,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-28 01:00:11,839 INFO L175 Difference]: Start difference. First operand has 267 places, 306 transitions, 3642 flow. Second operand 8 states and 237 transitions. [2024-06-28 01:00:11,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 348 transitions, 4410 flow [2024-06-28 01:00:12,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 348 transitions, 4194 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 01:00:12,568 INFO L231 Difference]: Finished difference. Result has 269 places, 306 transitions, 3612 flow [2024-06-28 01:00:12,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3426, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3612, PETRI_PLACES=269, PETRI_TRANSITIONS=306} [2024-06-28 01:00:12,569 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 219 predicate places. [2024-06-28 01:00:12,569 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 306 transitions, 3612 flow [2024-06-28 01:00:12,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:12,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:12,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:12,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 01:00:12,570 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:12,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:12,570 INFO L85 PathProgramCache]: Analyzing trace with hash -924482351, now seen corresponding path program 11 times [2024-06-28 01:00:12,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:12,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631536062] [2024-06-28 01:00:12,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:12,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:12,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:12,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631536062] [2024-06-28 01:00:12,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631536062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:12,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:12,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:12,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337279721] [2024-06-28 01:00:12,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:12,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:12,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:12,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:12,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:12,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:12,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 306 transitions, 3612 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:12,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:12,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:12,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:13,421 INFO L124 PetriNetUnfolderBase]: 3325/5501 cut-off events. [2024-06-28 01:00:13,421 INFO L125 PetriNetUnfolderBase]: For 176413/176416 co-relation queries the response was YES. [2024-06-28 01:00:13,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29910 conditions, 5501 events. 3325/5501 cut-off events. For 176413/176416 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 37320 event pairs, 622 based on Foata normal form. 3/5488 useless extension candidates. Maximal degree in co-relation 29798. Up to 4720 conditions per place. [2024-06-28 01:00:13,474 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 233 selfloop transitions, 90 changer transitions 0/337 dead transitions. [2024-06-28 01:00:13,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 337 transitions, 4498 flow [2024-06-28 01:00:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:00:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:00:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-28 01:00:13,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-06-28 01:00:13,476 INFO L175 Difference]: Start difference. First operand has 269 places, 306 transitions, 3612 flow. Second operand 6 states and 181 transitions. [2024-06-28 01:00:13,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 337 transitions, 4498 flow [2024-06-28 01:00:13,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 337 transitions, 4294 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 01:00:13,930 INFO L231 Difference]: Finished difference. Result has 267 places, 309 transitions, 3664 flow [2024-06-28 01:00:13,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3416, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3664, PETRI_PLACES=267, PETRI_TRANSITIONS=309} [2024-06-28 01:00:13,931 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-06-28 01:00:13,931 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 309 transitions, 3664 flow [2024-06-28 01:00:13,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:13,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:13,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:13,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 01:00:13,932 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:13,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:13,932 INFO L85 PathProgramCache]: Analyzing trace with hash -924245201, now seen corresponding path program 12 times [2024-06-28 01:00:13,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:13,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891546858] [2024-06-28 01:00:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:13,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:14,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:14,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891546858] [2024-06-28 01:00:14,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891546858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:14,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:14,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:14,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779876039] [2024-06-28 01:00:14,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:14,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:14,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:14,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:14,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:14,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:14,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 309 transitions, 3664 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:14,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:14,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:14,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:14,782 INFO L124 PetriNetUnfolderBase]: 3322/5467 cut-off events. [2024-06-28 01:00:14,782 INFO L125 PetriNetUnfolderBase]: For 158710/158713 co-relation queries the response was YES. [2024-06-28 01:00:14,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29550 conditions, 5467 events. 3322/5467 cut-off events. For 158710/158713 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 36908 event pairs, 607 based on Foata normal form. 3/5460 useless extension candidates. Maximal degree in co-relation 29438. Up to 4717 conditions per place. [2024-06-28 01:00:14,836 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 228 selfloop transitions, 91 changer transitions 0/333 dead transitions. [2024-06-28 01:00:14,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 333 transitions, 4358 flow [2024-06-28 01:00:14,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:00:14,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:00:14,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 01:00:14,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-06-28 01:00:14,837 INFO L175 Difference]: Start difference. First operand has 267 places, 309 transitions, 3664 flow. Second operand 6 states and 176 transitions. [2024-06-28 01:00:14,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 333 transitions, 4358 flow [2024-06-28 01:00:15,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 333 transitions, 4132 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 01:00:15,180 INFO L231 Difference]: Finished difference. Result has 267 places, 309 transitions, 3630 flow [2024-06-28 01:00:15,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3630, PETRI_PLACES=267, PETRI_TRANSITIONS=309} [2024-06-28 01:00:15,181 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-06-28 01:00:15,182 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 309 transitions, 3630 flow [2024-06-28 01:00:15,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:15,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:15,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:15,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 01:00:15,182 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:15,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:15,183 INFO L85 PathProgramCache]: Analyzing trace with hash 494566359, now seen corresponding path program 2 times [2024-06-28 01:00:15,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:15,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982299353] [2024-06-28 01:00:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:15,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:15,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:15,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982299353] [2024-06-28 01:00:15,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982299353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:15,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:15,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:15,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302534217] [2024-06-28 01:00:15,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:15,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:15,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:15,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:15,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 01:00:15,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 309 transitions, 3630 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:15,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:15,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 01:00:15,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:16,053 INFO L124 PetriNetUnfolderBase]: 3237/5361 cut-off events. [2024-06-28 01:00:16,053 INFO L125 PetriNetUnfolderBase]: For 166356/166356 co-relation queries the response was YES. [2024-06-28 01:00:16,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28929 conditions, 5361 events. 3237/5361 cut-off events. For 166356/166356 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 36334 event pairs, 568 based on Foata normal form. 10/5318 useless extension candidates. Maximal degree in co-relation 28819. Up to 4374 conditions per place. [2024-06-28 01:00:16,106 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 240 selfloop transitions, 38 changer transitions 0/338 dead transitions. [2024-06-28 01:00:16,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 338 transitions, 4286 flow [2024-06-28 01:00:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:00:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:00:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 01:00:16,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-28 01:00:16,107 INFO L175 Difference]: Start difference. First operand has 267 places, 309 transitions, 3630 flow. Second operand 6 states and 180 transitions. [2024-06-28 01:00:16,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 338 transitions, 4286 flow [2024-06-28 01:00:16,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 338 transitions, 4048 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 01:00:16,606 INFO L231 Difference]: Finished difference. Result has 267 places, 310 transitions, 3494 flow [2024-06-28 01:00:16,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3494, PETRI_PLACES=267, PETRI_TRANSITIONS=310} [2024-06-28 01:00:16,607 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-06-28 01:00:16,607 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 310 transitions, 3494 flow [2024-06-28 01:00:16,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:16,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:16,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:16,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 01:00:16,607 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:16,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:16,608 INFO L85 PathProgramCache]: Analyzing trace with hash 926230905, now seen corresponding path program 3 times [2024-06-28 01:00:16,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:16,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507390598] [2024-06-28 01:00:16,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:16,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:16,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:16,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507390598] [2024-06-28 01:00:16,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507390598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:16,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:16,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:16,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715492579] [2024-06-28 01:00:16,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:16,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:16,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:16,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:16,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:16,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 01:00:16,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 310 transitions, 3494 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:16,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:16,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 01:00:16,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:17,469 INFO L124 PetriNetUnfolderBase]: 3302/5469 cut-off events. [2024-06-28 01:00:17,469 INFO L125 PetriNetUnfolderBase]: For 167043/167043 co-relation queries the response was YES. [2024-06-28 01:00:17,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29270 conditions, 5469 events. 3302/5469 cut-off events. For 167043/167043 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 37177 event pairs, 458 based on Foata normal form. 9/5421 useless extension candidates. Maximal degree in co-relation 29161. Up to 4528 conditions per place. [2024-06-28 01:00:17,523 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 249 selfloop transitions, 30 changer transitions 0/339 dead transitions. [2024-06-28 01:00:17,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 339 transitions, 4156 flow [2024-06-28 01:00:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:00:17,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:00:17,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-28 01:00:17,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-06-28 01:00:17,525 INFO L175 Difference]: Start difference. First operand has 267 places, 310 transitions, 3494 flow. Second operand 5 states and 160 transitions. [2024-06-28 01:00:17,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 339 transitions, 4156 flow [2024-06-28 01:00:17,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 339 transitions, 4078 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 01:00:17,971 INFO L231 Difference]: Finished difference. Result has 268 places, 311 transitions, 3506 flow [2024-06-28 01:00:17,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3418, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3506, PETRI_PLACES=268, PETRI_TRANSITIONS=311} [2024-06-28 01:00:17,972 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 218 predicate places. [2024-06-28 01:00:17,972 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 311 transitions, 3506 flow [2024-06-28 01:00:17,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:17,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:17,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:17,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 01:00:17,972 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:17,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:17,973 INFO L85 PathProgramCache]: Analyzing trace with hash 941468025, now seen corresponding path program 4 times [2024-06-28 01:00:17,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:17,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544660374] [2024-06-28 01:00:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:17,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:18,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:18,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544660374] [2024-06-28 01:00:18,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544660374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:18,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:18,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:18,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566192963] [2024-06-28 01:00:18,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:18,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:18,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:18,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:18,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:18,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 01:00:18,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 311 transitions, 3506 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:18,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:18,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 01:00:18,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:18,881 INFO L124 PetriNetUnfolderBase]: 3313/5632 cut-off events. [2024-06-28 01:00:18,882 INFO L125 PetriNetUnfolderBase]: For 159278/159284 co-relation queries the response was YES. [2024-06-28 01:00:18,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29169 conditions, 5632 events. 3313/5632 cut-off events. For 159278/159284 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 39443 event pairs, 956 based on Foata normal form. 14/5549 useless extension candidates. Maximal degree in co-relation 29059. Up to 4499 conditions per place. [2024-06-28 01:00:18,934 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 253 selfloop transitions, 33 changer transitions 0/346 dead transitions. [2024-06-28 01:00:18,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 346 transitions, 4206 flow [2024-06-28 01:00:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:00:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:00:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-28 01:00:18,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.677536231884058 [2024-06-28 01:00:18,935 INFO L175 Difference]: Start difference. First operand has 268 places, 311 transitions, 3506 flow. Second operand 6 states and 187 transitions. [2024-06-28 01:00:18,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 346 transitions, 4206 flow [2024-06-28 01:00:19,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 346 transitions, 4152 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 01:00:19,485 INFO L231 Difference]: Finished difference. Result has 271 places, 312 transitions, 3540 flow [2024-06-28 01:00:19,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3452, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3540, PETRI_PLACES=271, PETRI_TRANSITIONS=312} [2024-06-28 01:00:19,486 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 221 predicate places. [2024-06-28 01:00:19,486 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 312 transitions, 3540 flow [2024-06-28 01:00:19,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:19,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:19,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:19,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 01:00:19,486 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:19,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash 85946723, now seen corresponding path program 1 times [2024-06-28 01:00:19,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:19,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522102378] [2024-06-28 01:00:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:19,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:19,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:19,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522102378] [2024-06-28 01:00:19,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522102378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:19,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:19,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:19,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475555741] [2024-06-28 01:00:19,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:19,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:19,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:19,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:19,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:19,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 01:00:19,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 312 transitions, 3540 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:19,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:19,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 01:00:19,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:20,398 INFO L124 PetriNetUnfolderBase]: 3467/5918 cut-off events. [2024-06-28 01:00:20,398 INFO L125 PetriNetUnfolderBase]: For 178661/178673 co-relation queries the response was YES. [2024-06-28 01:00:20,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31112 conditions, 5918 events. 3467/5918 cut-off events. For 178661/178673 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41846 event pairs, 1068 based on Foata normal form. 20/5887 useless extension candidates. Maximal degree in co-relation 31001. Up to 4759 conditions per place. [2024-06-28 01:00:20,454 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 257 selfloop transitions, 44 changer transitions 0/352 dead transitions. [2024-06-28 01:00:20,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 352 transitions, 4402 flow [2024-06-28 01:00:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:00:20,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:00:20,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-28 01:00:20,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-06-28 01:00:20,456 INFO L175 Difference]: Start difference. First operand has 271 places, 312 transitions, 3540 flow. Second operand 7 states and 210 transitions. [2024-06-28 01:00:20,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 352 transitions, 4402 flow [2024-06-28 01:00:20,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 352 transitions, 4328 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 01:00:20,949 INFO L231 Difference]: Finished difference. Result has 274 places, 314 transitions, 3588 flow [2024-06-28 01:00:20,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3588, PETRI_PLACES=274, PETRI_TRANSITIONS=314} [2024-06-28 01:00:20,949 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 224 predicate places. [2024-06-28 01:00:20,950 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 314 transitions, 3588 flow [2024-06-28 01:00:20,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:20,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:20,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:20,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 01:00:20,950 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:20,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:20,951 INFO L85 PathProgramCache]: Analyzing trace with hash 86064833, now seen corresponding path program 2 times [2024-06-28 01:00:20,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:20,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953846374] [2024-06-28 01:00:20,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:20,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:21,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:21,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953846374] [2024-06-28 01:00:21,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953846374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:21,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:21,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:21,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540479951] [2024-06-28 01:00:21,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:21,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:21,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:21,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:21,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:21,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 01:00:21,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 314 transitions, 3588 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:21,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:21,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 01:00:21,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:21,858 INFO L124 PetriNetUnfolderBase]: 3537/5881 cut-off events. [2024-06-28 01:00:21,858 INFO L125 PetriNetUnfolderBase]: For 186089/186095 co-relation queries the response was YES. [2024-06-28 01:00:21,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31604 conditions, 5881 events. 3537/5881 cut-off events. For 186089/186095 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 40699 event pairs, 612 based on Foata normal form. 9/5881 useless extension candidates. Maximal degree in co-relation 31492. Up to 4990 conditions per place. [2024-06-28 01:00:21,915 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 253 selfloop transitions, 42 changer transitions 0/346 dead transitions. [2024-06-28 01:00:21,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 346 transitions, 4286 flow [2024-06-28 01:00:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:00:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:00:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-28 01:00:21,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-06-28 01:00:21,916 INFO L175 Difference]: Start difference. First operand has 274 places, 314 transitions, 3588 flow. Second operand 7 states and 204 transitions. [2024-06-28 01:00:21,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 346 transitions, 4286 flow [2024-06-28 01:00:22,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 346 transitions, 4231 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 01:00:22,423 INFO L231 Difference]: Finished difference. Result has 278 places, 315 transitions, 3641 flow [2024-06-28 01:00:22,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3641, PETRI_PLACES=278, PETRI_TRANSITIONS=315} [2024-06-28 01:00:22,423 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 228 predicate places. [2024-06-28 01:00:22,424 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 315 transitions, 3641 flow [2024-06-28 01:00:22,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:22,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:22,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:22,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 01:00:22,424 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:22,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:22,425 INFO L85 PathProgramCache]: Analyzing trace with hash 201356003, now seen corresponding path program 3 times [2024-06-28 01:00:22,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:22,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632484649] [2024-06-28 01:00:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:22,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:22,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:22,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632484649] [2024-06-28 01:00:22,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632484649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:22,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:22,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:22,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885530226] [2024-06-28 01:00:22,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:22,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:22,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:22,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:22,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:22,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 01:00:22,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 315 transitions, 3641 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:22,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:22,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 01:00:22,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:23,419 INFO L124 PetriNetUnfolderBase]: 3615/5999 cut-off events. [2024-06-28 01:00:23,419 INFO L125 PetriNetUnfolderBase]: For 192970/192970 co-relation queries the response was YES. [2024-06-28 01:00:23,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32541 conditions, 5999 events. 3615/5999 cut-off events. For 192970/192970 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 41723 event pairs, 620 based on Foata normal form. 10/6000 useless extension candidates. Maximal degree in co-relation 32427. Up to 5129 conditions per place. [2024-06-28 01:00:23,482 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 263 selfloop transitions, 30 changer transitions 0/344 dead transitions. [2024-06-28 01:00:23,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 344 transitions, 4329 flow [2024-06-28 01:00:23,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:00:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:00:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-28 01:00:23,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-06-28 01:00:23,483 INFO L175 Difference]: Start difference. First operand has 278 places, 315 transitions, 3641 flow. Second operand 7 states and 200 transitions. [2024-06-28 01:00:23,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 344 transitions, 4329 flow [2024-06-28 01:00:23,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 344 transitions, 4245 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 01:00:23,988 INFO L231 Difference]: Finished difference. Result has 280 places, 316 transitions, 3643 flow [2024-06-28 01:00:23,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3557, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3643, PETRI_PLACES=280, PETRI_TRANSITIONS=316} [2024-06-28 01:00:23,989 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 230 predicate places. [2024-06-28 01:00:23,989 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 316 transitions, 3643 flow [2024-06-28 01:00:23,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:23,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:23,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:23,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 01:00:23,989 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:23,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:23,990 INFO L85 PathProgramCache]: Analyzing trace with hash 201540701, now seen corresponding path program 1 times [2024-06-28 01:00:23,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:23,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310558795] [2024-06-28 01:00:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:23,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:24,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:24,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310558795] [2024-06-28 01:00:24,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310558795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:24,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:24,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:24,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700565633] [2024-06-28 01:00:24,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:24,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:24,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:24,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:24,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:24,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:24,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 316 transitions, 3643 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:24,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:24,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:24,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:24,947 INFO L124 PetriNetUnfolderBase]: 3809/6211 cut-off events. [2024-06-28 01:00:24,947 INFO L125 PetriNetUnfolderBase]: For 183684/183684 co-relation queries the response was YES. [2024-06-28 01:00:24,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33600 conditions, 6211 events. 3809/6211 cut-off events. For 183684/183684 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 42572 event pairs, 661 based on Foata normal form. 2/6209 useless extension candidates. Maximal degree in co-relation 33485. Up to 5638 conditions per place. [2024-06-28 01:00:25,012 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 302 selfloop transitions, 27 changer transitions 0/343 dead transitions. [2024-06-28 01:00:25,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 343 transitions, 4391 flow [2024-06-28 01:00:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:00:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:00:25,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-28 01:00:25,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-06-28 01:00:25,014 INFO L175 Difference]: Start difference. First operand has 280 places, 316 transitions, 3643 flow. Second operand 7 states and 194 transitions. [2024-06-28 01:00:25,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 343 transitions, 4391 flow [2024-06-28 01:00:25,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 343 transitions, 4329 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 01:00:25,550 INFO L231 Difference]: Finished difference. Result has 282 places, 318 transitions, 3678 flow [2024-06-28 01:00:25,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3581, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3678, PETRI_PLACES=282, PETRI_TRANSITIONS=318} [2024-06-28 01:00:25,551 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 232 predicate places. [2024-06-28 01:00:25,551 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 318 transitions, 3678 flow [2024-06-28 01:00:25,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:25,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:25,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:25,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 01:00:25,552 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:25,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:25,552 INFO L85 PathProgramCache]: Analyzing trace with hash 704818241, now seen corresponding path program 4 times [2024-06-28 01:00:25,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:25,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773501142] [2024-06-28 01:00:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:25,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:25,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:25,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773501142] [2024-06-28 01:00:25,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773501142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:25,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:25,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:25,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682673043] [2024-06-28 01:00:25,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:25,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:25,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:25,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:25,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:25,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-06-28 01:00:25,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 318 transitions, 3678 flow. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:25,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:25,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-06-28 01:00:25,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:26,565 INFO L124 PetriNetUnfolderBase]: 3616/6005 cut-off events. [2024-06-28 01:00:26,565 INFO L125 PetriNetUnfolderBase]: For 185494/185494 co-relation queries the response was YES. [2024-06-28 01:00:26,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32061 conditions, 6005 events. 3616/6005 cut-off events. For 185494/185494 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 41791 event pairs, 569 based on Foata normal form. 10/6006 useless extension candidates. Maximal degree in co-relation 31945. Up to 4984 conditions per place. [2024-06-28 01:00:26,619 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 258 selfloop transitions, 40 changer transitions 0/349 dead transitions. [2024-06-28 01:00:26,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 349 transitions, 4368 flow [2024-06-28 01:00:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:00:26,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:00:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-28 01:00:26,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-06-28 01:00:26,620 INFO L175 Difference]: Start difference. First operand has 282 places, 318 transitions, 3678 flow. Second operand 6 states and 183 transitions. [2024-06-28 01:00:26,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 349 transitions, 4368 flow [2024-06-28 01:00:27,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 349 transitions, 4285 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 01:00:27,193 INFO L231 Difference]: Finished difference. Result has 283 places, 318 transitions, 3688 flow [2024-06-28 01:00:27,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3688, PETRI_PLACES=283, PETRI_TRANSITIONS=318} [2024-06-28 01:00:27,194 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 233 predicate places. [2024-06-28 01:00:27,194 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 318 transitions, 3688 flow [2024-06-28 01:00:27,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:27,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:27,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:27,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 01:00:27,195 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:27,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:27,195 INFO L85 PathProgramCache]: Analyzing trace with hash 711259049, now seen corresponding path program 2 times [2024-06-28 01:00:27,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:27,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638936128] [2024-06-28 01:00:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:27,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:27,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:27,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638936128] [2024-06-28 01:00:27,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638936128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:27,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:27,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:27,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308615422] [2024-06-28 01:00:27,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:27,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:27,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:27,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:27,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:27,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:27,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 318 transitions, 3688 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:27,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:27,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:27,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:28,134 INFO L124 PetriNetUnfolderBase]: 3804/6430 cut-off events. [2024-06-28 01:00:28,134 INFO L125 PetriNetUnfolderBase]: For 178505/178505 co-relation queries the response was YES. [2024-06-28 01:00:28,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33421 conditions, 6430 events. 3804/6430 cut-off events. For 178505/178505 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 45617 event pairs, 1316 based on Foata normal form. 2/6369 useless extension candidates. Maximal degree in co-relation 33304. Up to 5613 conditions per place. [2024-06-28 01:00:28,197 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 298 selfloop transitions, 27 changer transitions 0/339 dead transitions. [2024-06-28 01:00:28,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 339 transitions, 4420 flow [2024-06-28 01:00:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:00:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:00:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-28 01:00:28,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347826086956522 [2024-06-28 01:00:28,199 INFO L175 Difference]: Start difference. First operand has 283 places, 318 transitions, 3688 flow. Second operand 5 states and 146 transitions. [2024-06-28 01:00:28,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 339 transitions, 4420 flow [2024-06-28 01:00:28,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 339 transitions, 4332 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 01:00:28,741 INFO L231 Difference]: Finished difference. Result has 283 places, 320 transitions, 3705 flow [2024-06-28 01:00:28,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3600, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3705, PETRI_PLACES=283, PETRI_TRANSITIONS=320} [2024-06-28 01:00:28,741 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 233 predicate places. [2024-06-28 01:00:28,742 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 320 transitions, 3705 flow [2024-06-28 01:00:28,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:28,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:28,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:28,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 01:00:28,742 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:28,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:28,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1927896365, now seen corresponding path program 3 times [2024-06-28 01:00:28,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:28,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512543106] [2024-06-28 01:00:28,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:28,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:28,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:28,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512543106] [2024-06-28 01:00:28,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512543106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:28,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:28,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:00:28,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805165681] [2024-06-28 01:00:28,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:28,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:00:28,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:28,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:00:28,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:00:28,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:28,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 320 transitions, 3705 flow. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:28,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:28,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:28,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:29,768 INFO L124 PetriNetUnfolderBase]: 3799/6222 cut-off events. [2024-06-28 01:00:29,768 INFO L125 PetriNetUnfolderBase]: For 171898/171901 co-relation queries the response was YES. [2024-06-28 01:00:29,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33002 conditions, 6222 events. 3799/6222 cut-off events. For 171898/171901 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 42946 event pairs, 645 based on Foata normal form. 4/6212 useless extension candidates. Maximal degree in co-relation 32884. Up to 5574 conditions per place. [2024-06-28 01:00:29,818 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 297 selfloop transitions, 28 changer transitions 0/339 dead transitions. [2024-06-28 01:00:29,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 339 transitions, 4435 flow [2024-06-28 01:00:29,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:00:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:00:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-28 01:00:29,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217391304347826 [2024-06-28 01:00:29,819 INFO L175 Difference]: Start difference. First operand has 283 places, 320 transitions, 3705 flow. Second operand 5 states and 143 transitions. [2024-06-28 01:00:29,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 339 transitions, 4435 flow [2024-06-28 01:00:30,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 339 transitions, 4348 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 01:00:30,563 INFO L231 Difference]: Finished difference. Result has 285 places, 322 transitions, 3725 flow [2024-06-28 01:00:30,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3725, PETRI_PLACES=285, PETRI_TRANSITIONS=322} [2024-06-28 01:00:30,564 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 235 predicate places. [2024-06-28 01:00:30,564 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 322 transitions, 3725 flow [2024-06-28 01:00:30,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:30,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:30,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:30,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 01:00:30,565 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:30,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:30,565 INFO L85 PathProgramCache]: Analyzing trace with hash 829148931, now seen corresponding path program 1 times [2024-06-28 01:00:30,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:30,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109792644] [2024-06-28 01:00:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:30,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:30,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:30,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109792644] [2024-06-28 01:00:30,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109792644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:30,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:30,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:00:30,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239693053] [2024-06-28 01:00:30,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:30,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:00:30,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:30,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:00:30,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:00:30,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 46 [2024-06-28 01:00:30,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 322 transitions, 3725 flow. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:30,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:30,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 46 [2024-06-28 01:00:30,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:31,365 INFO L124 PetriNetUnfolderBase]: 2521/4778 cut-off events. [2024-06-28 01:00:31,365 INFO L125 PetriNetUnfolderBase]: For 116336/120839 co-relation queries the response was YES. [2024-06-28 01:00:31,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20411 conditions, 4778 events. 2521/4778 cut-off events. For 116336/120839 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 40268 event pairs, 719 based on Foata normal form. 161/4255 useless extension candidates. Maximal degree in co-relation 20292. Up to 1442 conditions per place. [2024-06-28 01:00:31,411 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 23 selfloop transitions, 46 changer transitions 93/425 dead transitions. [2024-06-28 01:00:31,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 425 transitions, 4883 flow [2024-06-28 01:00:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:00:31,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:00:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2024-06-28 01:00:31,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6832298136645962 [2024-06-28 01:00:31,412 INFO L175 Difference]: Start difference. First operand has 285 places, 322 transitions, 3725 flow. Second operand 7 states and 220 transitions. [2024-06-28 01:00:31,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 425 transitions, 4883 flow [2024-06-28 01:00:31,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 425 transitions, 4796 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 01:00:31,751 INFO L231 Difference]: Finished difference. Result has 293 places, 324 transitions, 3792 flow [2024-06-28 01:00:31,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3638, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3792, PETRI_PLACES=293, PETRI_TRANSITIONS=324} [2024-06-28 01:00:31,752 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 243 predicate places. [2024-06-28 01:00:31,752 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 324 transitions, 3792 flow [2024-06-28 01:00:31,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:31,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:31,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:31,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 01:00:31,752 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:31,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:31,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1291684946, now seen corresponding path program 1 times [2024-06-28 01:00:31,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:31,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975672778] [2024-06-28 01:00:31,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:31,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:31,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:31,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975672778] [2024-06-28 01:00:31,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975672778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:31,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:31,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:31,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205458763] [2024-06-28 01:00:31,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:31,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:31,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:31,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:31,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:31,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 324 transitions, 3792 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:31,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:31,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:31,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:32,785 INFO L124 PetriNetUnfolderBase]: 3689/6282 cut-off events. [2024-06-28 01:00:32,785 INFO L125 PetriNetUnfolderBase]: For 174934/175059 co-relation queries the response was YES. [2024-06-28 01:00:32,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34067 conditions, 6282 events. 3689/6282 cut-off events. For 174934/175059 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 44976 event pairs, 886 based on Foata normal form. 123/6358 useless extension candidates. Maximal degree in co-relation 33943. Up to 5031 conditions per place. [2024-06-28 01:00:32,855 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 226 selfloop transitions, 129 changer transitions 5/375 dead transitions. [2024-06-28 01:00:32,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 375 transitions, 5028 flow [2024-06-28 01:00:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-28 01:00:32,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-28 01:00:32,857 INFO L175 Difference]: Start difference. First operand has 293 places, 324 transitions, 3792 flow. Second operand 8 states and 237 transitions. [2024-06-28 01:00:32,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 375 transitions, 5028 flow [2024-06-28 01:00:33,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 375 transitions, 4968 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 01:00:33,493 INFO L231 Difference]: Finished difference. Result has 296 places, 332 transitions, 4140 flow [2024-06-28 01:00:33,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4140, PETRI_PLACES=296, PETRI_TRANSITIONS=332} [2024-06-28 01:00:33,494 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 246 predicate places. [2024-06-28 01:00:33,494 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 332 transitions, 4140 flow [2024-06-28 01:00:33,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:33,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:33,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:33,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 01:00:33,494 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:33,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:33,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2034408534, now seen corresponding path program 2 times [2024-06-28 01:00:33,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:33,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944045596] [2024-06-28 01:00:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:33,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:33,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:33,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944045596] [2024-06-28 01:00:33,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944045596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:33,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:33,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:33,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57686242] [2024-06-28 01:00:33,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:33,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:33,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:33,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:33,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:33,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:33,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 332 transitions, 4140 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:33,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:33,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:33,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:34,611 INFO L124 PetriNetUnfolderBase]: 3530/5907 cut-off events. [2024-06-28 01:00:34,612 INFO L125 PetriNetUnfolderBase]: For 182295/182428 co-relation queries the response was YES. [2024-06-28 01:00:34,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33140 conditions, 5907 events. 3530/5907 cut-off events. For 182295/182428 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 40920 event pairs, 717 based on Foata normal form. 133/6003 useless extension candidates. Maximal degree in co-relation 33016. Up to 5038 conditions per place. [2024-06-28 01:00:34,676 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 260 selfloop transitions, 97 changer transitions 0/372 dead transitions. [2024-06-28 01:00:34,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 372 transitions, 5170 flow [2024-06-28 01:00:34,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-28 01:00:34,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277173913043478 [2024-06-28 01:00:34,678 INFO L175 Difference]: Start difference. First operand has 296 places, 332 transitions, 4140 flow. Second operand 8 states and 231 transitions. [2024-06-28 01:00:34,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 372 transitions, 5170 flow [2024-06-28 01:00:35,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 372 transitions, 5023 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-28 01:00:35,423 INFO L231 Difference]: Finished difference. Result has 299 places, 338 transitions, 4299 flow [2024-06-28 01:00:35,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4017, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4299, PETRI_PLACES=299, PETRI_TRANSITIONS=338} [2024-06-28 01:00:35,423 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 249 predicate places. [2024-06-28 01:00:35,424 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 338 transitions, 4299 flow [2024-06-28 01:00:35,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:35,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:35,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:35,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 01:00:35,424 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:35,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:35,424 INFO L85 PathProgramCache]: Analyzing trace with hash -279580136, now seen corresponding path program 3 times [2024-06-28 01:00:35,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:35,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223866543] [2024-06-28 01:00:35,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:35,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:35,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:35,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223866543] [2024-06-28 01:00:35,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223866543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:35,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:35,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:35,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045759971] [2024-06-28 01:00:35,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:35,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:35,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:35,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:35,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:35,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:35,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 338 transitions, 4299 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:35,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:35,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:35,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:36,432 INFO L124 PetriNetUnfolderBase]: 3527/5913 cut-off events. [2024-06-28 01:00:36,432 INFO L125 PetriNetUnfolderBase]: For 185185/185318 co-relation queries the response was YES. [2024-06-28 01:00:36,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33332 conditions, 5913 events. 3527/5913 cut-off events. For 185185/185318 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 41012 event pairs, 720 based on Foata normal form. 133/6010 useless extension candidates. Maximal degree in co-relation 33207. Up to 5035 conditions per place. [2024-06-28 01:00:36,494 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 264 selfloop transitions, 98 changer transitions 0/377 dead transitions. [2024-06-28 01:00:36,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 377 transitions, 5127 flow [2024-06-28 01:00:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:00:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:00:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 276 transitions. [2024-06-28 01:00:36,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 01:00:36,496 INFO L175 Difference]: Start difference. First operand has 299 places, 338 transitions, 4299 flow. Second operand 10 states and 276 transitions. [2024-06-28 01:00:36,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 377 transitions, 5127 flow [2024-06-28 01:00:37,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 377 transitions, 4975 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 01:00:37,238 INFO L231 Difference]: Finished difference. Result has 305 places, 338 transitions, 4349 flow [2024-06-28 01:00:37,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4147, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4349, PETRI_PLACES=305, PETRI_TRANSITIONS=338} [2024-06-28 01:00:37,238 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 255 predicate places. [2024-06-28 01:00:37,238 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 338 transitions, 4349 flow [2024-06-28 01:00:37,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:37,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:37,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:37,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 01:00:37,239 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:37,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:37,239 INFO L85 PathProgramCache]: Analyzing trace with hash -838298710, now seen corresponding path program 4 times [2024-06-28 01:00:37,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:37,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704743896] [2024-06-28 01:00:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:37,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:37,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:37,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704743896] [2024-06-28 01:00:37,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704743896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:37,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:37,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:37,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289196807] [2024-06-28 01:00:37,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:37,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:37,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:37,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:37,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:37,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:37,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 338 transitions, 4349 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:37,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:37,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:37,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:38,420 INFO L124 PetriNetUnfolderBase]: 3566/6029 cut-off events. [2024-06-28 01:00:38,421 INFO L125 PetriNetUnfolderBase]: For 195744/195873 co-relation queries the response was YES. [2024-06-28 01:00:38,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34244 conditions, 6029 events. 3566/6029 cut-off events. For 195744/195873 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 42172 event pairs, 756 based on Foata normal form. 129/6115 useless extension candidates. Maximal degree in co-relation 34117. Up to 5043 conditions per place. [2024-06-28 01:00:38,474 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 259 selfloop transitions, 108 changer transitions 0/382 dead transitions. [2024-06-28 01:00:38,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 382 transitions, 5569 flow [2024-06-28 01:00:38,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:00:38,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:00:38,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-06-28 01:00:38,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6135265700483091 [2024-06-28 01:00:38,475 INFO L175 Difference]: Start difference. First operand has 305 places, 338 transitions, 4349 flow. Second operand 9 states and 254 transitions. [2024-06-28 01:00:38,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 382 transitions, 5569 flow [2024-06-28 01:00:39,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 382 transitions, 5365 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-28 01:00:39,244 INFO L231 Difference]: Finished difference. Result has 306 places, 347 transitions, 4530 flow [2024-06-28 01:00:39,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4145, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4530, PETRI_PLACES=306, PETRI_TRANSITIONS=347} [2024-06-28 01:00:39,245 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 256 predicate places. [2024-06-28 01:00:39,245 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 347 transitions, 4530 flow [2024-06-28 01:00:39,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:39,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:39,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:39,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 01:00:39,246 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:39,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:39,246 INFO L85 PathProgramCache]: Analyzing trace with hash -838293130, now seen corresponding path program 5 times [2024-06-28 01:00:39,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:39,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171930471] [2024-06-28 01:00:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:39,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:39,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:39,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171930471] [2024-06-28 01:00:39,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171930471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:39,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:39,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:39,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666210121] [2024-06-28 01:00:39,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:39,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:39,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:39,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:39,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:39,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:39,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 347 transitions, 4530 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:39,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:39,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:39,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:40,332 INFO L124 PetriNetUnfolderBase]: 3577/6052 cut-off events. [2024-06-28 01:00:40,332 INFO L125 PetriNetUnfolderBase]: For 201334/201463 co-relation queries the response was YES. [2024-06-28 01:00:40,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34573 conditions, 6052 events. 3577/6052 cut-off events. For 201334/201463 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 42437 event pairs, 755 based on Foata normal form. 129/6138 useless extension candidates. Maximal degree in co-relation 34444. Up to 5055 conditions per place. [2024-06-28 01:00:40,400 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 264 selfloop transitions, 112 changer transitions 0/391 dead transitions. [2024-06-28 01:00:40,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 391 transitions, 5704 flow [2024-06-28 01:00:40,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:00:40,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:00:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 302 transitions. [2024-06-28 01:00:40,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968379446640316 [2024-06-28 01:00:40,401 INFO L175 Difference]: Start difference. First operand has 306 places, 347 transitions, 4530 flow. Second operand 11 states and 302 transitions. [2024-06-28 01:00:40,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 391 transitions, 5704 flow [2024-06-28 01:00:41,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 391 transitions, 5450 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 01:00:41,223 INFO L231 Difference]: Finished difference. Result has 312 places, 350 transitions, 4556 flow [2024-06-28 01:00:41,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4556, PETRI_PLACES=312, PETRI_TRANSITIONS=350} [2024-06-28 01:00:41,223 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 262 predicate places. [2024-06-28 01:00:41,224 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 350 transitions, 4556 flow [2024-06-28 01:00:41,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:41,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:41,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:41,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 01:00:41,224 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:41,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:41,225 INFO L85 PathProgramCache]: Analyzing trace with hash 522734726, now seen corresponding path program 6 times [2024-06-28 01:00:41,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:41,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751932840] [2024-06-28 01:00:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:41,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:41,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:41,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751932840] [2024-06-28 01:00:41,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751932840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:41,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:41,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:41,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79193477] [2024-06-28 01:00:41,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:41,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:41,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:41,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:41,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:41,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:41,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 350 transitions, 4556 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:41,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:41,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:41,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:42,256 INFO L124 PetriNetUnfolderBase]: 3574/5999 cut-off events. [2024-06-28 01:00:42,256 INFO L125 PetriNetUnfolderBase]: For 202121/202254 co-relation queries the response was YES. [2024-06-28 01:00:42,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34423 conditions, 5999 events. 3574/5999 cut-off events. For 202121/202254 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 41806 event pairs, 720 based on Foata normal form. 133/6097 useless extension candidates. Maximal degree in co-relation 34293. Up to 5052 conditions per place. [2024-06-28 01:00:42,323 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 256 selfloop transitions, 116 changer transitions 0/387 dead transitions. [2024-06-28 01:00:42,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 387 transitions, 5532 flow [2024-06-28 01:00:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:00:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:00:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-06-28 01:00:42,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5956521739130435 [2024-06-28 01:00:42,324 INFO L175 Difference]: Start difference. First operand has 312 places, 350 transitions, 4556 flow. Second operand 10 states and 274 transitions. [2024-06-28 01:00:42,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 387 transitions, 5532 flow [2024-06-28 01:00:43,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 387 transitions, 5272 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-28 01:00:43,143 INFO L231 Difference]: Finished difference. Result has 313 places, 350 transitions, 4534 flow [2024-06-28 01:00:43,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4296, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4534, PETRI_PLACES=313, PETRI_TRANSITIONS=350} [2024-06-28 01:00:43,143 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 263 predicate places. [2024-06-28 01:00:43,144 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 350 transitions, 4534 flow [2024-06-28 01:00:43,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:43,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:43,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:43,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 01:00:43,144 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:43,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:43,145 INFO L85 PathProgramCache]: Analyzing trace with hash -472349394, now seen corresponding path program 7 times [2024-06-28 01:00:43,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:43,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491057494] [2024-06-28 01:00:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:43,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:43,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:43,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491057494] [2024-06-28 01:00:43,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491057494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:43,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:43,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:43,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348251669] [2024-06-28 01:00:43,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:43,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:43,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:43,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:43,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:43,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:43,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 350 transitions, 4534 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:43,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:43,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:43,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:44,579 INFO L124 PetriNetUnfolderBase]: 3599/6139 cut-off events. [2024-06-28 01:00:44,580 INFO L125 PetriNetUnfolderBase]: For 211174/211300 co-relation queries the response was YES. [2024-06-28 01:00:44,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34914 conditions, 6139 events. 3599/6139 cut-off events. For 211174/211300 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 43328 event pairs, 769 based on Foata normal form. 127/6222 useless extension candidates. Maximal degree in co-relation 34783. Up to 4831 conditions per place. [2024-06-28 01:00:44,670 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 213 selfloop transitions, 163 changer transitions 0/391 dead transitions. [2024-06-28 01:00:44,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 391 transitions, 5754 flow [2024-06-28 01:00:44,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-28 01:00:44,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331521739130435 [2024-06-28 01:00:44,671 INFO L175 Difference]: Start difference. First operand has 313 places, 350 transitions, 4534 flow. Second operand 8 states and 233 transitions. [2024-06-28 01:00:44,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 391 transitions, 5754 flow [2024-06-28 01:00:45,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 391 transitions, 5531 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 01:00:45,659 INFO L231 Difference]: Finished difference. Result has 313 places, 356 transitions, 4747 flow [2024-06-28 01:00:45,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4747, PETRI_PLACES=313, PETRI_TRANSITIONS=356} [2024-06-28 01:00:45,661 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 263 predicate places. [2024-06-28 01:00:45,662 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 356 transitions, 4747 flow [2024-06-28 01:00:45,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:45,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:45,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:45,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 01:00:45,662 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:45,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1372630388, now seen corresponding path program 8 times [2024-06-28 01:00:45,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:45,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102480711] [2024-06-28 01:00:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:45,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:45,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:45,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102480711] [2024-06-28 01:00:45,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102480711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:45,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:45,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:45,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283916548] [2024-06-28 01:00:45,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:45,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:45,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:45,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:45,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:45,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:45,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 356 transitions, 4747 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:45,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:45,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:45,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:47,123 INFO L124 PetriNetUnfolderBase]: 3610/6150 cut-off events. [2024-06-28 01:00:47,123 INFO L125 PetriNetUnfolderBase]: For 217581/217707 co-relation queries the response was YES. [2024-06-28 01:00:47,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35345 conditions, 6150 events. 3610/6150 cut-off events. For 217581/217707 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 43392 event pairs, 779 based on Foata normal form. 127/6229 useless extension candidates. Maximal degree in co-relation 35213. Up to 4843 conditions per place. [2024-06-28 01:00:47,220 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 224 selfloop transitions, 156 changer transitions 0/395 dead transitions. [2024-06-28 01:00:47,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 395 transitions, 6073 flow [2024-06-28 01:00:47,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:47,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:47,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-28 01:00:47,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6385869565217391 [2024-06-28 01:00:47,221 INFO L175 Difference]: Start difference. First operand has 313 places, 356 transitions, 4747 flow. Second operand 8 states and 235 transitions. [2024-06-28 01:00:47,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 395 transitions, 6073 flow [2024-06-28 01:00:48,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 395 transitions, 5787 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-28 01:00:48,095 INFO L231 Difference]: Finished difference. Result has 317 places, 359 transitions, 4837 flow [2024-06-28 01:00:48,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4837, PETRI_PLACES=317, PETRI_TRANSITIONS=359} [2024-06-28 01:00:48,096 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 267 predicate places. [2024-06-28 01:00:48,096 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 359 transitions, 4837 flow [2024-06-28 01:00:48,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:48,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:48,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:48,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 01:00:48,097 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:48,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:48,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1627264210, now seen corresponding path program 9 times [2024-06-28 01:00:48,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:48,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91597282] [2024-06-28 01:00:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:48,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:48,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:48,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91597282] [2024-06-28 01:00:48,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91597282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:48,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:48,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:48,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496619362] [2024-06-28 01:00:48,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:48,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:48,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:48,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:48,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:48,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:48,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 359 transitions, 4837 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:48,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:48,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:48,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:49,509 INFO L124 PetriNetUnfolderBase]: 3635/6105 cut-off events. [2024-06-28 01:00:49,509 INFO L125 PetriNetUnfolderBase]: For 224317/224447 co-relation queries the response was YES. [2024-06-28 01:00:49,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35603 conditions, 6105 events. 3635/6105 cut-off events. For 224317/224447 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 42672 event pairs, 723 based on Foata normal form. 131/6197 useless extension candidates. Maximal degree in co-relation 35470. Up to 4870 conditions per place. [2024-06-28 01:00:49,569 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 212 selfloop transitions, 170 changer transitions 0/397 dead transitions. [2024-06-28 01:00:49,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 397 transitions, 6059 flow [2024-06-28 01:00:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:49,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-28 01:00:49,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277173913043478 [2024-06-28 01:00:49,571 INFO L175 Difference]: Start difference. First operand has 317 places, 359 transitions, 4837 flow. Second operand 8 states and 231 transitions. [2024-06-28 01:00:49,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 397 transitions, 6059 flow [2024-06-28 01:00:50,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 397 transitions, 5551 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 01:00:50,326 INFO L231 Difference]: Finished difference. Result has 318 places, 365 transitions, 4769 flow [2024-06-28 01:00:50,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4347, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4769, PETRI_PLACES=318, PETRI_TRANSITIONS=365} [2024-06-28 01:00:50,326 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 268 predicate places. [2024-06-28 01:00:50,326 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 365 transitions, 4769 flow [2024-06-28 01:00:50,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:50,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:50,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:50,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 01:00:50,327 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:50,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:50,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1368905738, now seen corresponding path program 10 times [2024-06-28 01:00:50,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:50,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138891273] [2024-06-28 01:00:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:50,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:50,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:50,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138891273] [2024-06-28 01:00:50,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138891273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:50,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:50,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:50,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906978987] [2024-06-28 01:00:50,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:50,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:50,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:50,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:50,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:50,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:50,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 365 transitions, 4769 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:50,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:50,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:50,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:51,489 INFO L124 PetriNetUnfolderBase]: 3646/6095 cut-off events. [2024-06-28 01:00:51,489 INFO L125 PetriNetUnfolderBase]: For 226836/226966 co-relation queries the response was YES. [2024-06-28 01:00:51,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35604 conditions, 6095 events. 3646/6095 cut-off events. For 226836/226966 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 42384 event pairs, 721 based on Foata normal form. 131/6187 useless extension candidates. Maximal degree in co-relation 35470. Up to 5196 conditions per place. [2024-06-28 01:00:51,559 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 292 selfloop transitions, 98 changer transitions 0/405 dead transitions. [2024-06-28 01:00:51,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 405 transitions, 5835 flow [2024-06-28 01:00:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:00:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:00:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-06-28 01:00:51,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5956521739130435 [2024-06-28 01:00:51,561 INFO L175 Difference]: Start difference. First operand has 318 places, 365 transitions, 4769 flow. Second operand 10 states and 274 transitions. [2024-06-28 01:00:51,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 405 transitions, 5835 flow [2024-06-28 01:00:52,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 405 transitions, 5558 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 01:00:52,577 INFO L231 Difference]: Finished difference. Result has 324 places, 368 transitions, 4740 flow [2024-06-28 01:00:52,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4740, PETRI_PLACES=324, PETRI_TRANSITIONS=368} [2024-06-28 01:00:52,578 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 274 predicate places. [2024-06-28 01:00:52,578 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 368 transitions, 4740 flow [2024-06-28 01:00:52,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:52,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:52,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:52,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 01:00:52,578 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:52,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:52,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1368911318, now seen corresponding path program 11 times [2024-06-28 01:00:52,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:52,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529272052] [2024-06-28 01:00:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:52,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:52,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:52,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529272052] [2024-06-28 01:00:52,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529272052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:52,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:52,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:52,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809537168] [2024-06-28 01:00:52,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:52,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:52,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:52,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:52,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:52,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 368 transitions, 4740 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:52,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:52,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:52,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:53,645 INFO L124 PetriNetUnfolderBase]: 3643/6100 cut-off events. [2024-06-28 01:00:53,646 INFO L125 PetriNetUnfolderBase]: For 229326/229456 co-relation queries the response was YES. [2024-06-28 01:00:53,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35334 conditions, 6100 events. 3643/6100 cut-off events. For 229326/229456 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 42563 event pairs, 726 based on Foata normal form. 131/6191 useless extension candidates. Maximal degree in co-relation 35199. Up to 5193 conditions per place. [2024-06-28 01:00:53,714 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 286 selfloop transitions, 97 changer transitions 0/398 dead transitions. [2024-06-28 01:00:53,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 398 transitions, 5586 flow [2024-06-28 01:00:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-28 01:00:53,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-06-28 01:00:53,715 INFO L175 Difference]: Start difference. First operand has 324 places, 368 transitions, 4740 flow. Second operand 8 states and 227 transitions. [2024-06-28 01:00:53,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 398 transitions, 5586 flow [2024-06-28 01:00:54,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 398 transitions, 5322 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-28 01:00:54,624 INFO L231 Difference]: Finished difference. Result has 323 places, 368 transitions, 4676 flow [2024-06-28 01:00:54,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4476, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4676, PETRI_PLACES=323, PETRI_TRANSITIONS=368} [2024-06-28 01:00:54,624 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 273 predicate places. [2024-06-28 01:00:54,624 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 368 transitions, 4676 flow [2024-06-28 01:00:54,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:54,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:54,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:54,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 01:00:54,625 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:54,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:54,625 INFO L85 PathProgramCache]: Analyzing trace with hash -567820084, now seen corresponding path program 12 times [2024-06-28 01:00:54,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:54,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162425871] [2024-06-28 01:00:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:54,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:54,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:54,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162425871] [2024-06-28 01:00:54,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162425871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:54,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:54,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:54,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320450243] [2024-06-28 01:00:54,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:54,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:54,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:54,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:54,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:54,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:54,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 368 transitions, 4676 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:54,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:54,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:54,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:55,710 INFO L124 PetriNetUnfolderBase]: 3640/6230 cut-off events. [2024-06-28 01:00:55,710 INFO L125 PetriNetUnfolderBase]: For 232577/232690 co-relation queries the response was YES. [2024-06-28 01:00:55,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35392 conditions, 6230 events. 3640/6230 cut-off events. For 232577/232690 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 44238 event pairs, 998 based on Foata normal form. 114/6299 useless extension candidates. Maximal degree in co-relation 35256. Up to 5336 conditions per place. [2024-06-28 01:00:55,787 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 338 selfloop transitions, 45 changer transitions 0/398 dead transitions. [2024-06-28 01:00:55,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 398 transitions, 5522 flow [2024-06-28 01:00:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:55,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-28 01:00:55,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059782608695652 [2024-06-28 01:00:55,789 INFO L175 Difference]: Start difference. First operand has 323 places, 368 transitions, 4676 flow. Second operand 8 states and 223 transitions. [2024-06-28 01:00:55,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 398 transitions, 5522 flow [2024-06-28 01:00:56,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 398 transitions, 5312 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 01:00:56,549 INFO L231 Difference]: Finished difference. Result has 324 places, 368 transitions, 4562 flow [2024-06-28 01:00:56,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4562, PETRI_PLACES=324, PETRI_TRANSITIONS=368} [2024-06-28 01:00:56,550 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 274 predicate places. [2024-06-28 01:00:56,550 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 368 transitions, 4562 flow [2024-06-28 01:00:56,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:56,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:56,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:56,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 01:00:56,551 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:56,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:56,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1946762060, now seen corresponding path program 13 times [2024-06-28 01:00:56,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:56,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860481227] [2024-06-28 01:00:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:56,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:56,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:56,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860481227] [2024-06-28 01:00:56,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860481227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:56,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:56,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:56,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470967309] [2024-06-28 01:00:56,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:56,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:56,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:56,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:56,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:56,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:56,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 368 transitions, 4562 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:56,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:56,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:56,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:57,631 INFO L124 PetriNetUnfolderBase]: 3679/6248 cut-off events. [2024-06-28 01:00:57,631 INFO L125 PetriNetUnfolderBase]: For 243736/243862 co-relation queries the response was YES. [2024-06-28 01:00:57,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35671 conditions, 6248 events. 3679/6248 cut-off events. For 243736/243862 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 44245 event pairs, 773 based on Foata normal form. 127/6328 useless extension candidates. Maximal degree in co-relation 35534. Up to 5158 conditions per place. [2024-06-28 01:00:57,705 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 272 selfloop transitions, 119 changer transitions 0/406 dead transitions. [2024-06-28 01:00:57,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 406 transitions, 5845 flow [2024-06-28 01:00:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:00:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:00:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-28 01:00:57,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-06-28 01:00:57,706 INFO L175 Difference]: Start difference. First operand has 324 places, 368 transitions, 4562 flow. Second operand 8 states and 227 transitions. [2024-06-28 01:00:57,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 406 transitions, 5845 flow [2024-06-28 01:00:58,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 406 transitions, 5617 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-28 01:00:58,561 INFO L231 Difference]: Finished difference. Result has 323 places, 377 transitions, 4754 flow [2024-06-28 01:00:58,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4334, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4754, PETRI_PLACES=323, PETRI_TRANSITIONS=377} [2024-06-28 01:00:58,562 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 273 predicate places. [2024-06-28 01:00:58,562 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 377 transitions, 4754 flow [2024-06-28 01:00:58,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:58,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:00:58,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:00:58,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 01:00:58,562 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:00:58,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:00:58,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1283665640, now seen corresponding path program 14 times [2024-06-28 01:00:58,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:00:58,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14155161] [2024-06-28 01:00:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:00:58,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:00:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:00:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:00:58,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:00:58,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14155161] [2024-06-28 01:00:58,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14155161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:00:58,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:00:58,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:00:58,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582002362] [2024-06-28 01:00:58,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:00:58,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:00:58,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:00:58,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:00:58,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:00:58,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:00:58,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 377 transitions, 4754 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:00:58,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:00:58,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:00:58,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:00:59,691 INFO L124 PetriNetUnfolderBase]: 3690/6218 cut-off events. [2024-06-28 01:00:59,691 INFO L125 PetriNetUnfolderBase]: For 247598/247730 co-relation queries the response was YES. [2024-06-28 01:00:59,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36170 conditions, 6218 events. 3690/6218 cut-off events. For 247598/247730 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 43584 event pairs, 739 based on Foata normal form. 133/6316 useless extension candidates. Maximal degree in co-relation 36032. Up to 5435 conditions per place. [2024-06-28 01:00:59,764 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 359 selfloop transitions, 40 changer transitions 0/414 dead transitions. [2024-06-28 01:00:59,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 414 transitions, 5848 flow [2024-06-28 01:00:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:00:59,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:00:59,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-06-28 01:00:59,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826086956521739 [2024-06-28 01:00:59,765 INFO L175 Difference]: Start difference. First operand has 323 places, 377 transitions, 4754 flow. Second operand 10 states and 268 transitions. [2024-06-28 01:00:59,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 414 transitions, 5848 flow [2024-06-28 01:01:00,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 414 transitions, 5702 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 01:01:00,727 INFO L231 Difference]: Finished difference. Result has 330 places, 380 transitions, 4756 flow [2024-06-28 01:01:00,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4614, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4756, PETRI_PLACES=330, PETRI_TRANSITIONS=380} [2024-06-28 01:01:00,728 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 280 predicate places. [2024-06-28 01:01:00,728 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 380 transitions, 4756 flow [2024-06-28 01:01:00,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:00,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:00,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:00,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 01:01:00,728 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:00,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:00,729 INFO L85 PathProgramCache]: Analyzing trace with hash 864121198, now seen corresponding path program 15 times [2024-06-28 01:01:00,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:00,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745116424] [2024-06-28 01:01:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:00,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:00,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:00,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745116424] [2024-06-28 01:01:00,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745116424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:00,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:00,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:00,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660290923] [2024-06-28 01:01:00,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:00,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:00,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:00,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:00,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:00,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:00,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 380 transitions, 4756 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:00,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:00,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:00,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:01,864 INFO L124 PetriNetUnfolderBase]: 3712/6258 cut-off events. [2024-06-28 01:01:01,864 INFO L125 PetriNetUnfolderBase]: For 252276/252408 co-relation queries the response was YES. [2024-06-28 01:01:01,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36544 conditions, 6258 events. 3712/6258 cut-off events. For 252276/252408 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 44005 event pairs, 739 based on Foata normal form. 133/6356 useless extension candidates. Maximal degree in co-relation 36404. Up to 5455 conditions per place. [2024-06-28 01:01:01,938 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 365 selfloop transitions, 46 changer transitions 0/426 dead transitions. [2024-06-28 01:01:01,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 426 transitions, 5937 flow [2024-06-28 01:01:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 01:01:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 01:01:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 316 transitions. [2024-06-28 01:01:01,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2024-06-28 01:01:01,940 INFO L175 Difference]: Start difference. First operand has 330 places, 380 transitions, 4756 flow. Second operand 12 states and 316 transitions. [2024-06-28 01:01:01,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 426 transitions, 5937 flow [2024-06-28 01:01:02,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 426 transitions, 5809 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-28 01:01:02,915 INFO L231 Difference]: Finished difference. Result has 335 places, 386 transitions, 4827 flow [2024-06-28 01:01:02,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4644, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4827, PETRI_PLACES=335, PETRI_TRANSITIONS=386} [2024-06-28 01:01:02,916 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 285 predicate places. [2024-06-28 01:01:02,916 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 386 transitions, 4827 flow [2024-06-28 01:01:02,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:02,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:02,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:02,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 01:01:02,916 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:02,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:02,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1938493430, now seen corresponding path program 16 times [2024-06-28 01:01:02,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:02,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122475069] [2024-06-28 01:01:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:02,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:03,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:03,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122475069] [2024-06-28 01:01:03,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122475069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:03,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:03,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:03,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600088889] [2024-06-28 01:01:03,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:03,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:03,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:03,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:03,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 386 transitions, 4827 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:03,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:03,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:03,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:04,132 INFO L124 PetriNetUnfolderBase]: 3723/6273 cut-off events. [2024-06-28 01:01:04,132 INFO L125 PetriNetUnfolderBase]: For 258215/258345 co-relation queries the response was YES. [2024-06-28 01:01:04,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36686 conditions, 6273 events. 3723/6273 cut-off events. For 258215/258345 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 44110 event pairs, 741 based on Foata normal form. 131/6363 useless extension candidates. Maximal degree in co-relation 36545. Up to 5202 conditions per place. [2024-06-28 01:01:04,199 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 277 selfloop transitions, 135 changer transitions 0/427 dead transitions. [2024-06-28 01:01:04,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 427 transitions, 6115 flow [2024-06-28 01:01:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:01:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:01:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 300 transitions. [2024-06-28 01:01:04,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928853754940712 [2024-06-28 01:01:04,201 INFO L175 Difference]: Start difference. First operand has 335 places, 386 transitions, 4827 flow. Second operand 11 states and 300 transitions. [2024-06-28 01:01:04,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 427 transitions, 6115 flow [2024-06-28 01:01:05,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 427 transitions, 6007 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-28 01:01:05,103 INFO L231 Difference]: Finished difference. Result has 337 places, 389 transitions, 5051 flow [2024-06-28 01:01:05,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4719, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5051, PETRI_PLACES=337, PETRI_TRANSITIONS=389} [2024-06-28 01:01:05,104 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 287 predicate places. [2024-06-28 01:01:05,104 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 389 transitions, 5051 flow [2024-06-28 01:01:05,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:05,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:05,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:05,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 01:01:05,105 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:05,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:05,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1288761110, now seen corresponding path program 17 times [2024-06-28 01:01:05,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:05,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696698720] [2024-06-28 01:01:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:05,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:05,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:05,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696698720] [2024-06-28 01:01:05,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696698720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:05,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:05,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:05,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577700905] [2024-06-28 01:01:05,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:05,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:05,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:05,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:05,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:05,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:05,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 389 transitions, 5051 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:05,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:05,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:05,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:06,280 INFO L124 PetriNetUnfolderBase]: 3720/6340 cut-off events. [2024-06-28 01:01:06,280 INFO L125 PetriNetUnfolderBase]: For 263301/263414 co-relation queries the response was YES. [2024-06-28 01:01:06,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37106 conditions, 6340 events. 3720/6340 cut-off events. For 263301/263414 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 45060 event pairs, 1009 based on Foata normal form. 114/6405 useless extension candidates. Maximal degree in co-relation 36964. Up to 5488 conditions per place. [2024-06-28 01:01:06,358 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 365 selfloop transitions, 36 changer transitions 0/416 dead transitions. [2024-06-28 01:01:06,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 416 transitions, 5925 flow [2024-06-28 01:01:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:01:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:01:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-28 01:01:06,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-06-28 01:01:06,359 INFO L175 Difference]: Start difference. First operand has 337 places, 389 transitions, 5051 flow. Second operand 8 states and 220 transitions. [2024-06-28 01:01:06,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 416 transitions, 5925 flow [2024-06-28 01:01:07,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 416 transitions, 5589 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-28 01:01:07,569 INFO L231 Difference]: Finished difference. Result has 336 places, 389 transitions, 4793 flow [2024-06-28 01:01:07,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4793, PETRI_PLACES=336, PETRI_TRANSITIONS=389} [2024-06-28 01:01:07,570 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 286 predicate places. [2024-06-28 01:01:07,570 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 389 transitions, 4793 flow [2024-06-28 01:01:07,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:07,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:07,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:07,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 01:01:07,571 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:07,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:07,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1297480790, now seen corresponding path program 18 times [2024-06-28 01:01:07,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:07,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722158044] [2024-06-28 01:01:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:07,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:07,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:07,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722158044] [2024-06-28 01:01:07,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722158044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:07,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:07,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:07,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169816568] [2024-06-28 01:01:07,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:07,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:07,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:07,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:07,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:07,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:07,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 389 transitions, 4793 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:07,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:07,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:07,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:08,740 INFO L124 PetriNetUnfolderBase]: 3717/6277 cut-off events. [2024-06-28 01:01:08,740 INFO L125 PetriNetUnfolderBase]: For 263187/263317 co-relation queries the response was YES. [2024-06-28 01:01:08,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36415 conditions, 6277 events. 3717/6277 cut-off events. For 263187/263317 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 44300 event pairs, 745 based on Foata normal form. 131/6367 useless extension candidates. Maximal degree in co-relation 36273. Up to 5196 conditions per place. [2024-06-28 01:01:08,804 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 274 selfloop transitions, 133 changer transitions 0/422 dead transitions. [2024-06-28 01:01:08,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 422 transitions, 5695 flow [2024-06-28 01:01:08,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:01:08,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:01:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 275 transitions. [2024-06-28 01:01:08,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-06-28 01:01:08,805 INFO L175 Difference]: Start difference. First operand has 336 places, 389 transitions, 4793 flow. Second operand 10 states and 275 transitions. [2024-06-28 01:01:08,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 422 transitions, 5695 flow [2024-06-28 01:01:09,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 422 transitions, 5585 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-28 01:01:09,746 INFO L231 Difference]: Finished difference. Result has 338 places, 389 transitions, 4955 flow [2024-06-28 01:01:09,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4683, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4955, PETRI_PLACES=338, PETRI_TRANSITIONS=389} [2024-06-28 01:01:09,747 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 288 predicate places. [2024-06-28 01:01:09,747 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 389 transitions, 4955 flow [2024-06-28 01:01:09,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:09,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:09,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:09,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 01:01:09,747 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:09,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:09,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1737984070, now seen corresponding path program 19 times [2024-06-28 01:01:09,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:09,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446907752] [2024-06-28 01:01:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:09,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:09,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:09,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446907752] [2024-06-28 01:01:09,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446907752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:09,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:09,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:09,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126728968] [2024-06-28 01:01:09,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:09,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:09,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:09,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:09,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:09,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:09,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 389 transitions, 4955 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:09,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:09,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:09,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:10,890 INFO L124 PetriNetUnfolderBase]: 3770/6383 cut-off events. [2024-06-28 01:01:10,891 INFO L125 PetriNetUnfolderBase]: For 282028/282157 co-relation queries the response was YES. [2024-06-28 01:01:10,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37628 conditions, 6383 events. 3770/6383 cut-off events. For 282028/282157 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 45160 event pairs, 750 based on Foata normal form. 129/6472 useless extension candidates. Maximal degree in co-relation 37485. Up to 5086 conditions per place. [2024-06-28 01:01:10,978 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 230 selfloop transitions, 200 changer transitions 0/445 dead transitions. [2024-06-28 01:01:10,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 445 transitions, 6439 flow [2024-06-28 01:01:10,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:01:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:01:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 284 transitions. [2024-06-28 01:01:10,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6173913043478261 [2024-06-28 01:01:10,979 INFO L175 Difference]: Start difference. First operand has 338 places, 389 transitions, 4955 flow. Second operand 10 states and 284 transitions. [2024-06-28 01:01:10,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 445 transitions, 6439 flow [2024-06-28 01:01:12,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 445 transitions, 6125 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-28 01:01:12,317 INFO L231 Difference]: Finished difference. Result has 338 places, 401 transitions, 5239 flow [2024-06-28 01:01:12,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4641, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5239, PETRI_PLACES=338, PETRI_TRANSITIONS=401} [2024-06-28 01:01:12,317 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 288 predicate places. [2024-06-28 01:01:12,317 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 401 transitions, 5239 flow [2024-06-28 01:01:12,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:12,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:12,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:12,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 01:01:12,318 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:12,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:12,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1351889188, now seen corresponding path program 20 times [2024-06-28 01:01:12,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:12,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363561799] [2024-06-28 01:01:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:12,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:12,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:12,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363561799] [2024-06-28 01:01:12,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363561799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:12,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:12,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:12,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619017146] [2024-06-28 01:01:12,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:12,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:12,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:12,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:12,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:12,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:12,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 401 transitions, 5239 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:12,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:12,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:12,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:13,561 INFO L124 PetriNetUnfolderBase]: 3767/6333 cut-off events. [2024-06-28 01:01:13,562 INFO L125 PetriNetUnfolderBase]: For 284024/284157 co-relation queries the response was YES. [2024-06-28 01:01:13,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37824 conditions, 6333 events. 3767/6333 cut-off events. For 284024/284157 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 44597 event pairs, 744 based on Foata normal form. 133/6424 useless extension candidates. Maximal degree in co-relation 37680. Up to 5308 conditions per place. [2024-06-28 01:01:13,624 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 315 selfloop transitions, 108 changer transitions 0/438 dead transitions. [2024-06-28 01:01:13,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 438 transitions, 6345 flow [2024-06-28 01:01:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-28 01:01:13,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708074534161491 [2024-06-28 01:01:13,625 INFO L175 Difference]: Start difference. First operand has 338 places, 401 transitions, 5239 flow. Second operand 7 states and 216 transitions. [2024-06-28 01:01:13,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 438 transitions, 6345 flow [2024-06-28 01:01:14,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 438 transitions, 5887 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-28 01:01:14,897 INFO L231 Difference]: Finished difference. Result has 337 places, 401 transitions, 5013 flow [2024-06-28 01:01:14,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5013, PETRI_PLACES=337, PETRI_TRANSITIONS=401} [2024-06-28 01:01:14,898 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 287 predicate places. [2024-06-28 01:01:14,898 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 401 transitions, 5013 flow [2024-06-28 01:01:14,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:14,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:14,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:14,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 01:01:14,899 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:14,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:14,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1405813208, now seen corresponding path program 21 times [2024-06-28 01:01:14,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:14,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040798583] [2024-06-28 01:01:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:14,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:15,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:15,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040798583] [2024-06-28 01:01:15,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040798583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:15,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:15,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:15,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927905445] [2024-06-28 01:01:15,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:15,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:15,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:15,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:15,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:15,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 401 transitions, 5013 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:15,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:15,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:15,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:16,051 INFO L124 PetriNetUnfolderBase]: 3778/6390 cut-off events. [2024-06-28 01:01:16,051 INFO L125 PetriNetUnfolderBase]: For 282804/282933 co-relation queries the response was YES. [2024-06-28 01:01:16,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37516 conditions, 6390 events. 3778/6390 cut-off events. For 282804/282933 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 45290 event pairs, 753 based on Foata normal form. 129/6476 useless extension candidates. Maximal degree in co-relation 37372. Up to 5095 conditions per place. [2024-06-28 01:01:16,128 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 242 selfloop transitions, 194 changer transitions 0/451 dead transitions. [2024-06-28 01:01:16,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 451 transitions, 6370 flow [2024-06-28 01:01:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:01:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:01:16,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 269 transitions. [2024-06-28 01:01:16,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6497584541062802 [2024-06-28 01:01:16,130 INFO L175 Difference]: Start difference. First operand has 337 places, 401 transitions, 5013 flow. Second operand 9 states and 269 transitions. [2024-06-28 01:01:16,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 451 transitions, 6370 flow [2024-06-28 01:01:17,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 451 transitions, 6187 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 01:01:17,629 INFO L231 Difference]: Finished difference. Result has 340 places, 404 transitions, 5269 flow [2024-06-28 01:01:17,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5269, PETRI_PLACES=340, PETRI_TRANSITIONS=404} [2024-06-28 01:01:17,630 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 290 predicate places. [2024-06-28 01:01:17,630 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 404 transitions, 5269 flow [2024-06-28 01:01:17,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:17,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:17,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:17,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 01:01:17,630 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:17,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:17,631 INFO L85 PathProgramCache]: Analyzing trace with hash -372388664, now seen corresponding path program 22 times [2024-06-28 01:01:17,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:17,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899975782] [2024-06-28 01:01:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:17,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:17,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:17,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899975782] [2024-06-28 01:01:17,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899975782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:17,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:17,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:17,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343982009] [2024-06-28 01:01:17,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:17,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:17,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:17,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:17,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:17,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:17,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 404 transitions, 5269 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:17,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:17,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:17,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:18,900 INFO L124 PetriNetUnfolderBase]: 3775/6433 cut-off events. [2024-06-28 01:01:18,901 INFO L125 PetriNetUnfolderBase]: For 287286/287414 co-relation queries the response was YES. [2024-06-28 01:01:18,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37900 conditions, 6433 events. 3775/6433 cut-off events. For 287286/287414 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 45899 event pairs, 774 based on Foata normal form. 129/6521 useless extension candidates. Maximal degree in co-relation 37757. Up to 5320 conditions per place. [2024-06-28 01:01:18,961 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 321 selfloop transitions, 117 changer transitions 0/453 dead transitions. [2024-06-28 01:01:18,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 453 transitions, 6439 flow [2024-06-28 01:01:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:01:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:01:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 271 transitions. [2024-06-28 01:01:18,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6545893719806763 [2024-06-28 01:01:18,962 INFO L175 Difference]: Start difference. First operand has 340 places, 404 transitions, 5269 flow. Second operand 9 states and 271 transitions. [2024-06-28 01:01:18,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 453 transitions, 6439 flow [2024-06-28 01:01:20,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 453 transitions, 6093 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 01:01:20,338 INFO L231 Difference]: Finished difference. Result has 341 places, 404 transitions, 5187 flow [2024-06-28 01:01:20,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5187, PETRI_PLACES=341, PETRI_TRANSITIONS=404} [2024-06-28 01:01:20,339 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 291 predicate places. [2024-06-28 01:01:20,339 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 404 transitions, 5187 flow [2024-06-28 01:01:20,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:20,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:20,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:20,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 01:01:20,339 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:20,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:20,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1745335720, now seen corresponding path program 23 times [2024-06-28 01:01:20,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:20,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129952700] [2024-06-28 01:01:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:20,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:20,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:20,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129952700] [2024-06-28 01:01:20,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129952700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:20,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:20,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:20,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370440472] [2024-06-28 01:01:20,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:20,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:20,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:20,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:20,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:20,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:20,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 404 transitions, 5187 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:20,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:20,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:20,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:21,475 INFO L124 PetriNetUnfolderBase]: 3772/6333 cut-off events. [2024-06-28 01:01:21,475 INFO L125 PetriNetUnfolderBase]: For 276234/276367 co-relation queries the response was YES. [2024-06-28 01:01:21,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37402 conditions, 6333 events. 3772/6333 cut-off events. For 276234/276367 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 44577 event pairs, 723 based on Foata normal form. 133/6428 useless extension candidates. Maximal degree in co-relation 37260. Up to 5089 conditions per place. [2024-06-28 01:01:21,548 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 244 selfloop transitions, 197 changer transitions 0/456 dead transitions. [2024-06-28 01:01:21,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 456 transitions, 6369 flow [2024-06-28 01:01:21,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:01:21,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:01:21,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 316 transitions. [2024-06-28 01:01:21,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6245059288537549 [2024-06-28 01:01:21,549 INFO L175 Difference]: Start difference. First operand has 341 places, 404 transitions, 5187 flow. Second operand 11 states and 316 transitions. [2024-06-28 01:01:21,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 456 transitions, 6369 flow [2024-06-28 01:01:23,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 456 transitions, 6093 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-28 01:01:23,093 INFO L231 Difference]: Finished difference. Result has 343 places, 404 transitions, 5325 flow [2024-06-28 01:01:23,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4917, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5325, PETRI_PLACES=343, PETRI_TRANSITIONS=404} [2024-06-28 01:01:23,093 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 293 predicate places. [2024-06-28 01:01:23,094 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 404 transitions, 5325 flow [2024-06-28 01:01:23,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:23,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:23,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:23,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 01:01:23,094 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:23,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:23,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1961338320, now seen corresponding path program 24 times [2024-06-28 01:01:23,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:23,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338593303] [2024-06-28 01:01:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:23,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:23,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:23,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338593303] [2024-06-28 01:01:23,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338593303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:23,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:23,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:23,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122038046] [2024-06-28 01:01:23,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:23,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:23,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:23,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:23,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:23,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:23,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 404 transitions, 5325 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:23,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:23,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:23,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:24,379 INFO L124 PetriNetUnfolderBase]: 3805/6540 cut-off events. [2024-06-28 01:01:24,379 INFO L125 PetriNetUnfolderBase]: For 268579/268655 co-relation queries the response was YES. [2024-06-28 01:01:24,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38147 conditions, 6540 events. 3805/6540 cut-off events. For 268579/268655 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 47194 event pairs, 1137 based on Foata normal form. 77/6559 useless extension candidates. Maximal degree in co-relation 38007. Up to 5526 conditions per place. [2024-06-28 01:01:24,441 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 364 selfloop transitions, 67 changer transitions 0/446 dead transitions. [2024-06-28 01:01:24,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 446 transitions, 6431 flow [2024-06-28 01:01:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:01:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:01:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-06-28 01:01:24,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990338164251208 [2024-06-28 01:01:24,442 INFO L175 Difference]: Start difference. First operand has 343 places, 404 transitions, 5325 flow. Second operand 9 states and 248 transitions. [2024-06-28 01:01:24,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 446 transitions, 6431 flow [2024-06-28 01:01:25,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 446 transitions, 5979 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-28 01:01:25,880 INFO L231 Difference]: Finished difference. Result has 341 places, 413 transitions, 5205 flow [2024-06-28 01:01:25,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4891, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5205, PETRI_PLACES=341, PETRI_TRANSITIONS=413} [2024-06-28 01:01:25,882 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 291 predicate places. [2024-06-28 01:01:25,882 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 413 transitions, 5205 flow [2024-06-28 01:01:25,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:25,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:25,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:25,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 01:01:25,883 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:25,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:25,883 INFO L85 PathProgramCache]: Analyzing trace with hash -372655574, now seen corresponding path program 25 times [2024-06-28 01:01:25,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:25,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735885882] [2024-06-28 01:01:25,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:25,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:25,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:25,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735885882] [2024-06-28 01:01:25,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735885882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:25,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:25,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:25,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618100865] [2024-06-28 01:01:25,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:25,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:25,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:26,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:26,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:26,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 413 transitions, 5205 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:26,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:26,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:26,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:27,055 INFO L124 PetriNetUnfolderBase]: 3802/6395 cut-off events. [2024-06-28 01:01:27,055 INFO L125 PetriNetUnfolderBase]: For 255631/255761 co-relation queries the response was YES. [2024-06-28 01:01:27,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37190 conditions, 6395 events. 3802/6395 cut-off events. For 255631/255761 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 45159 event pairs, 745 based on Foata normal form. 131/6486 useless extension candidates. Maximal degree in co-relation 37050. Up to 5345 conditions per place. [2024-06-28 01:01:27,135 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 323 selfloop transitions, 123 changer transitions 0/461 dead transitions. [2024-06-28 01:01:27,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 461 transitions, 6225 flow [2024-06-28 01:01:27,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:01:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:01:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 272 transitions. [2024-06-28 01:01:27,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6570048309178744 [2024-06-28 01:01:27,137 INFO L175 Difference]: Start difference. First operand has 341 places, 413 transitions, 5205 flow. Second operand 9 states and 272 transitions. [2024-06-28 01:01:27,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 461 transitions, 6225 flow [2024-06-28 01:01:28,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 461 transitions, 6053 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-28 01:01:28,351 INFO L231 Difference]: Finished difference. Result has 344 places, 413 transitions, 5305 flow [2024-06-28 01:01:28,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5033, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5305, PETRI_PLACES=344, PETRI_TRANSITIONS=413} [2024-06-28 01:01:28,352 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 294 predicate places. [2024-06-28 01:01:28,352 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 413 transitions, 5305 flow [2024-06-28 01:01:28,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:28,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:28,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:28,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 01:01:28,353 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:28,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:28,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1947528750, now seen corresponding path program 26 times [2024-06-28 01:01:28,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:28,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328479000] [2024-06-28 01:01:28,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:28,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:28,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:28,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328479000] [2024-06-28 01:01:28,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328479000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:28,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:28,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:28,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479120691] [2024-06-28 01:01:28,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:28,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:28,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:28,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:28,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:28,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 413 transitions, 5305 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:28,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:28,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:28,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:29,692 INFO L124 PetriNetUnfolderBase]: 3813/6491 cut-off events. [2024-06-28 01:01:29,693 INFO L125 PetriNetUnfolderBase]: For 258768/258894 co-relation queries the response was YES. [2024-06-28 01:01:29,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37581 conditions, 6491 events. 3813/6491 cut-off events. For 258768/258894 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 46393 event pairs, 758 based on Foata normal form. 127/6574 useless extension candidates. Maximal degree in co-relation 37441. Up to 5130 conditions per place. [2024-06-28 01:01:29,755 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 233 selfloop transitions, 211 changer transitions 0/459 dead transitions. [2024-06-28 01:01:29,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 459 transitions, 6503 flow [2024-06-28 01:01:29,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:01:29,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:01:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-06-28 01:01:29,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-28 01:01:29,757 INFO L175 Difference]: Start difference. First operand has 344 places, 413 transitions, 5305 flow. Second operand 10 states and 285 transitions. [2024-06-28 01:01:29,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 459 transitions, 6503 flow [2024-06-28 01:01:31,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 459 transitions, 6217 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 01:01:31,058 INFO L231 Difference]: Finished difference. Result has 346 places, 416 transitions, 5497 flow [2024-06-28 01:01:31,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5021, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5497, PETRI_PLACES=346, PETRI_TRANSITIONS=416} [2024-06-28 01:01:31,059 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 296 predicate places. [2024-06-28 01:01:31,059 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 416 transitions, 5497 flow [2024-06-28 01:01:31,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:31,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:31,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:31,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 01:01:31,060 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:31,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:31,060 INFO L85 PathProgramCache]: Analyzing trace with hash 374222254, now seen corresponding path program 27 times [2024-06-28 01:01:31,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:31,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832602650] [2024-06-28 01:01:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:31,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:31,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:31,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832602650] [2024-06-28 01:01:31,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832602650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:31,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:31,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:31,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226074453] [2024-06-28 01:01:31,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:31,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:31,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:31,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:31,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:31,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:31,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 416 transitions, 5497 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:31,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:31,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:31,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:32,210 INFO L124 PetriNetUnfolderBase]: 3810/6390 cut-off events. [2024-06-28 01:01:32,211 INFO L125 PetriNetUnfolderBase]: For 253554/253684 co-relation queries the response was YES. [2024-06-28 01:01:32,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37734 conditions, 6390 events. 3810/6390 cut-off events. For 253554/253684 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 45030 event pairs, 729 based on Foata normal form. 131/6479 useless extension candidates. Maximal degree in co-relation 37593. Up to 5127 conditions per place. [2024-06-28 01:01:32,287 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 233 selfloop transitions, 199 changer transitions 0/447 dead transitions. [2024-06-28 01:01:32,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 447 transitions, 6599 flow [2024-06-28 01:01:32,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 01:01:32,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-28 01:01:32,288 INFO L175 Difference]: Start difference. First operand has 346 places, 416 transitions, 5497 flow. Second operand 7 states and 208 transitions. [2024-06-28 01:01:32,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 447 transitions, 6599 flow [2024-06-28 01:01:33,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 447 transitions, 6027 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-28 01:01:33,543 INFO L231 Difference]: Finished difference. Result has 342 places, 416 transitions, 5337 flow [2024-06-28 01:01:33,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4929, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5337, PETRI_PLACES=342, PETRI_TRANSITIONS=416} [2024-06-28 01:01:33,544 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 292 predicate places. [2024-06-28 01:01:33,544 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 416 transitions, 5337 flow [2024-06-28 01:01:33,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:33,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:33,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:33,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 01:01:33,545 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:33,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:33,545 INFO L85 PathProgramCache]: Analyzing trace with hash 365948044, now seen corresponding path program 28 times [2024-06-28 01:01:33,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:33,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253035092] [2024-06-28 01:01:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:33,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:33,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:33,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253035092] [2024-06-28 01:01:33,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253035092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:33,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:33,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:33,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22929913] [2024-06-28 01:01:33,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:33,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:33,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:33,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:33,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:33,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:33,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 416 transitions, 5337 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:33,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:33,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:33,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:34,690 INFO L124 PetriNetUnfolderBase]: 3807/6478 cut-off events. [2024-06-28 01:01:34,690 INFO L125 PetriNetUnfolderBase]: For 246147/246273 co-relation queries the response was YES. [2024-06-28 01:01:34,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37454 conditions, 6478 events. 3807/6478 cut-off events. For 246147/246273 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 46306 event pairs, 759 based on Foata normal form. 127/6560 useless extension candidates. Maximal degree in co-relation 37314. Up to 5124 conditions per place. [2024-06-28 01:01:34,900 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 237 selfloop transitions, 206 changer transitions 0/458 dead transitions. [2024-06-28 01:01:34,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 458 transitions, 6335 flow [2024-06-28 01:01:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:01:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:01:34,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2024-06-28 01:01:34,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6400966183574879 [2024-06-28 01:01:34,902 INFO L175 Difference]: Start difference. First operand has 342 places, 416 transitions, 5337 flow. Second operand 9 states and 265 transitions. [2024-06-28 01:01:34,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 458 transitions, 6335 flow [2024-06-28 01:01:35,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 458 transitions, 5881 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 01:01:35,986 INFO L231 Difference]: Finished difference. Result has 344 places, 416 transitions, 5309 flow [2024-06-28 01:01:35,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4883, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5309, PETRI_PLACES=344, PETRI_TRANSITIONS=416} [2024-06-28 01:01:35,987 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 294 predicate places. [2024-06-28 01:01:35,987 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 416 transitions, 5309 flow [2024-06-28 01:01:35,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:35,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:35,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:35,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 01:01:35,988 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:35,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:35,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1283173608, now seen corresponding path program 1 times [2024-06-28 01:01:35,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:35,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446869130] [2024-06-28 01:01:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:35,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:36,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:36,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446869130] [2024-06-28 01:01:36,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446869130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:36,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:36,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:36,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40972602] [2024-06-28 01:01:36,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:36,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:36,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:36,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:36,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:36,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 416 transitions, 5309 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:36,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:36,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:36,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:37,193 INFO L124 PetriNetUnfolderBase]: 3899/6683 cut-off events. [2024-06-28 01:01:37,193 INFO L125 PetriNetUnfolderBase]: For 262409/262485 co-relation queries the response was YES. [2024-06-28 01:01:37,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38386 conditions, 6683 events. 3899/6683 cut-off events. For 262409/262485 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 48282 event pairs, 1167 based on Foata normal form. 82/6705 useless extension candidates. Maximal degree in co-relation 38246. Up to 5606 conditions per place. [2024-06-28 01:01:37,274 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 405 selfloop transitions, 38 changer transitions 0/458 dead transitions. [2024-06-28 01:01:37,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 458 transitions, 6372 flow [2024-06-28 01:01:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:01:37,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:01:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2024-06-28 01:01:37,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-06-28 01:01:37,276 INFO L175 Difference]: Start difference. First operand has 344 places, 416 transitions, 5309 flow. Second operand 10 states and 270 transitions. [2024-06-28 01:01:37,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 458 transitions, 6372 flow [2024-06-28 01:01:38,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 458 transitions, 5894 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-28 01:01:38,372 INFO L231 Difference]: Finished difference. Result has 344 places, 418 transitions, 4958 flow [2024-06-28 01:01:38,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4831, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4958, PETRI_PLACES=344, PETRI_TRANSITIONS=418} [2024-06-28 01:01:38,373 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 294 predicate places. [2024-06-28 01:01:38,373 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 418 transitions, 4958 flow [2024-06-28 01:01:38,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:38,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:38,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:38,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 01:01:38,373 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:38,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:38,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1144743716, now seen corresponding path program 2 times [2024-06-28 01:01:38,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:38,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939632693] [2024-06-28 01:01:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:38,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:38,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:38,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939632693] [2024-06-28 01:01:38,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939632693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:38,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:38,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:38,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011286244] [2024-06-28 01:01:38,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:38,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:38,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:38,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:38,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:38,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:38,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 418 transitions, 4958 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:38,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:38,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:38,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:39,581 INFO L124 PetriNetUnfolderBase]: 3945/6654 cut-off events. [2024-06-28 01:01:39,581 INFO L125 PetriNetUnfolderBase]: For 254969/255099 co-relation queries the response was YES. [2024-06-28 01:01:39,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37977 conditions, 6654 events. 3945/6654 cut-off events. For 254969/255099 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 47426 event pairs, 711 based on Foata normal form. 136/6750 useless extension candidates. Maximal degree in co-relation 37837. Up to 5376 conditions per place. [2024-06-28 01:01:39,804 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 389 selfloop transitions, 53 changer transitions 0/457 dead transitions. [2024-06-28 01:01:39,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 457 transitions, 6016 flow [2024-06-28 01:01:39,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 01:01:39,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-06-28 01:01:39,805 INFO L175 Difference]: Start difference. First operand has 344 places, 418 transitions, 4958 flow. Second operand 7 states and 208 transitions. [2024-06-28 01:01:39,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 457 transitions, 6016 flow [2024-06-28 01:01:40,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 457 transitions, 5936 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 01:01:40,810 INFO L231 Difference]: Finished difference. Result has 344 places, 419 transitions, 5014 flow [2024-06-28 01:01:40,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4878, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5014, PETRI_PLACES=344, PETRI_TRANSITIONS=419} [2024-06-28 01:01:40,811 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 294 predicate places. [2024-06-28 01:01:40,811 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 419 transitions, 5014 flow [2024-06-28 01:01:40,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:40,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:40,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:40,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 01:01:40,812 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:40,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:40,813 INFO L85 PathProgramCache]: Analyzing trace with hash -364754232, now seen corresponding path program 3 times [2024-06-28 01:01:40,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:40,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91327031] [2024-06-28 01:01:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:40,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:40,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:40,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91327031] [2024-06-28 01:01:40,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91327031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:40,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:40,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:40,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260167840] [2024-06-28 01:01:40,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:40,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:40,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:40,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:40,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:40,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:40,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 419 transitions, 5014 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:40,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:40,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:40,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:42,000 INFO L124 PetriNetUnfolderBase]: 3932/6622 cut-off events. [2024-06-28 01:01:42,000 INFO L125 PetriNetUnfolderBase]: For 243118/243251 co-relation queries the response was YES. [2024-06-28 01:01:42,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37556 conditions, 6622 events. 3932/6622 cut-off events. For 243118/243251 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 47212 event pairs, 697 based on Foata normal form. 138/6718 useless extension candidates. Maximal degree in co-relation 37415. Up to 5271 conditions per place. [2024-06-28 01:01:42,079 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 387 selfloop transitions, 53 changer transitions 0/455 dead transitions. [2024-06-28 01:01:42,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 455 transitions, 6040 flow [2024-06-28 01:01:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:01:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:01:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-28 01:01:42,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-06-28 01:01:42,080 INFO L175 Difference]: Start difference. First operand has 344 places, 419 transitions, 5014 flow. Second operand 7 states and 205 transitions. [2024-06-28 01:01:42,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 455 transitions, 6040 flow [2024-06-28 01:01:43,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 455 transitions, 5920 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 01:01:43,373 INFO L231 Difference]: Finished difference. Result has 346 places, 419 transitions, 5004 flow [2024-06-28 01:01:43,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4894, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5004, PETRI_PLACES=346, PETRI_TRANSITIONS=419} [2024-06-28 01:01:43,374 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 296 predicate places. [2024-06-28 01:01:43,374 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 419 transitions, 5004 flow [2024-06-28 01:01:43,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:43,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:43,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:43,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 01:01:43,375 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:43,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:43,375 INFO L85 PathProgramCache]: Analyzing trace with hash 913859492, now seen corresponding path program 1 times [2024-06-28 01:01:43,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:43,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955657530] [2024-06-28 01:01:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:43,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:43,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:43,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955657530] [2024-06-28 01:01:43,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955657530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:43,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:43,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:43,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186465591] [2024-06-28 01:01:43,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:43,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:43,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:43,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:43,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:43,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:43,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 419 transitions, 5004 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:43,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:43,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:43,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:44,540 INFO L124 PetriNetUnfolderBase]: 3957/6713 cut-off events. [2024-06-28 01:01:44,540 INFO L125 PetriNetUnfolderBase]: For 230991/231121 co-relation queries the response was YES. [2024-06-28 01:01:44,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37826 conditions, 6713 events. 3957/6713 cut-off events. For 230991/231121 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 48072 event pairs, 798 based on Foata normal form. 131/6807 useless extension candidates. Maximal degree in co-relation 37684. Up to 5798 conditions per place. [2024-06-28 01:01:44,757 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 417 selfloop transitions, 36 changer transitions 0/468 dead transitions. [2024-06-28 01:01:44,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 468 transitions, 6274 flow [2024-06-28 01:01:44,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:01:44,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:01:44,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-28 01:01:44,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6385869565217391 [2024-06-28 01:01:44,759 INFO L175 Difference]: Start difference. First operand has 346 places, 419 transitions, 5004 flow. Second operand 8 states and 235 transitions. [2024-06-28 01:01:44,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 468 transitions, 6274 flow [2024-06-28 01:01:45,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 468 transitions, 6125 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 01:01:45,803 INFO L231 Difference]: Finished difference. Result has 348 places, 425 transitions, 5035 flow [2024-06-28 01:01:45,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4855, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5035, PETRI_PLACES=348, PETRI_TRANSITIONS=425} [2024-06-28 01:01:45,804 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 298 predicate places. [2024-06-28 01:01:45,804 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 425 transitions, 5035 flow [2024-06-28 01:01:45,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:45,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:45,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:45,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 01:01:45,805 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:45,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:45,805 INFO L85 PathProgramCache]: Analyzing trace with hash -949634128, now seen corresponding path program 1 times [2024-06-28 01:01:45,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:45,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568588528] [2024-06-28 01:01:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:45,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:45,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:45,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568588528] [2024-06-28 01:01:45,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568588528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:45,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:45,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:45,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004237035] [2024-06-28 01:01:45,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:45,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:45,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:45,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:45,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:45,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:45,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 425 transitions, 5035 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:45,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:45,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:45,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:47,007 INFO L124 PetriNetUnfolderBase]: 3993/6766 cut-off events. [2024-06-28 01:01:47,007 INFO L125 PetriNetUnfolderBase]: For 241445/241575 co-relation queries the response was YES. [2024-06-28 01:01:47,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38197 conditions, 6766 events. 3993/6766 cut-off events. For 241445/241575 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 48457 event pairs, 806 based on Foata normal form. 131/6856 useless extension candidates. Maximal degree in co-relation 38055. Up to 5785 conditions per place. [2024-06-28 01:01:47,092 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 407 selfloop transitions, 52 changer transitions 0/474 dead transitions. [2024-06-28 01:01:47,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 474 transitions, 6348 flow [2024-06-28 01:01:47,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:01:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:01:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-28 01:01:47,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6385869565217391 [2024-06-28 01:01:47,093 INFO L175 Difference]: Start difference. First operand has 348 places, 425 transitions, 5035 flow. Second operand 8 states and 235 transitions. [2024-06-28 01:01:47,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 474 transitions, 6348 flow [2024-06-28 01:01:48,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 474 transitions, 6244 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-28 01:01:48,310 INFO L231 Difference]: Finished difference. Result has 353 places, 434 transitions, 5188 flow [2024-06-28 01:01:48,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4936, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5188, PETRI_PLACES=353, PETRI_TRANSITIONS=434} [2024-06-28 01:01:48,311 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 303 predicate places. [2024-06-28 01:01:48,311 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 434 transitions, 5188 flow [2024-06-28 01:01:48,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:48,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:48,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:48,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 01:01:48,312 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:48,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:48,312 INFO L85 PathProgramCache]: Analyzing trace with hash -949634314, now seen corresponding path program 2 times [2024-06-28 01:01:48,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:48,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196561546] [2024-06-28 01:01:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:48,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:48,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:48,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196561546] [2024-06-28 01:01:48,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196561546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:48,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:48,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:48,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717862072] [2024-06-28 01:01:48,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:48,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:48,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:48,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:48,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:48,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:48,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 434 transitions, 5188 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:48,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:48,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:48,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:49,667 INFO L124 PetriNetUnfolderBase]: 4004/6762 cut-off events. [2024-06-28 01:01:49,667 INFO L125 PetriNetUnfolderBase]: For 244327/244457 co-relation queries the response was YES. [2024-06-28 01:01:49,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38774 conditions, 6762 events. 4004/6762 cut-off events. For 244327/244457 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 48312 event pairs, 800 based on Foata normal form. 131/6854 useless extension candidates. Maximal degree in co-relation 38629. Up to 5877 conditions per place. [2024-06-28 01:01:49,730 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 427 selfloop transitions, 34 changer transitions 0/476 dead transitions. [2024-06-28 01:01:49,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 476 transitions, 6248 flow [2024-06-28 01:01:49,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:01:49,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:01:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-28 01:01:49,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 01:01:49,731 INFO L175 Difference]: Start difference. First operand has 353 places, 434 transitions, 5188 flow. Second operand 8 states and 230 transitions. [2024-06-28 01:01:49,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 476 transitions, 6248 flow [2024-06-28 01:01:51,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 476 transitions, 6044 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-28 01:01:51,190 INFO L231 Difference]: Finished difference. Result has 357 places, 437 transitions, 5098 flow [2024-06-28 01:01:51,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4984, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5098, PETRI_PLACES=357, PETRI_TRANSITIONS=437} [2024-06-28 01:01:51,191 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 307 predicate places. [2024-06-28 01:01:51,191 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 437 transitions, 5098 flow [2024-06-28 01:01:51,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:51,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:51,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:51,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 01:01:51,191 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:51,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:51,192 INFO L85 PathProgramCache]: Analyzing trace with hash -67082786, now seen corresponding path program 2 times [2024-06-28 01:01:51,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:51,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460017601] [2024-06-28 01:01:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:51,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:51,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:51,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460017601] [2024-06-28 01:01:51,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460017601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:51,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:51,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:51,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131340403] [2024-06-28 01:01:51,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:51,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:51,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:51,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:51,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:51,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:51,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 437 transitions, 5098 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:51,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:51,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:51,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:52,423 INFO L124 PetriNetUnfolderBase]: 4062/6846 cut-off events. [2024-06-28 01:01:52,424 INFO L125 PetriNetUnfolderBase]: For 251698/251826 co-relation queries the response was YES. [2024-06-28 01:01:52,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39305 conditions, 6846 events. 4062/6846 cut-off events. For 251698/251826 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 48915 event pairs, 1023 based on Foata normal form. 129/6926 useless extension candidates. Maximal degree in co-relation 39160. Up to 5847 conditions per place. [2024-06-28 01:01:52,505 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 419 selfloop transitions, 68 changer transitions 0/502 dead transitions. [2024-06-28 01:01:52,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 502 transitions, 6728 flow [2024-06-28 01:01:52,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:01:52,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:01:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 308 transitions. [2024-06-28 01:01:52,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-06-28 01:01:52,507 INFO L175 Difference]: Start difference. First operand has 357 places, 437 transitions, 5098 flow. Second operand 11 states and 308 transitions. [2024-06-28 01:01:52,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 502 transitions, 6728 flow [2024-06-28 01:01:53,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 502 transitions, 6620 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 01:01:53,864 INFO L231 Difference]: Finished difference. Result has 363 places, 452 transitions, 5356 flow [2024-06-28 01:01:53,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5004, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5356, PETRI_PLACES=363, PETRI_TRANSITIONS=452} [2024-06-28 01:01:53,865 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 313 predicate places. [2024-06-28 01:01:53,865 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 452 transitions, 5356 flow [2024-06-28 01:01:53,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:53,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:53,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:53,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 01:01:53,866 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:53,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:53,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1588478148, now seen corresponding path program 3 times [2024-06-28 01:01:53,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:53,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619660676] [2024-06-28 01:01:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:53,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:54,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:54,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619660676] [2024-06-28 01:01:54,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619660676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:54,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:54,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:54,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781806332] [2024-06-28 01:01:54,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:54,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:54,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:54,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:54,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:54,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:54,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 452 transitions, 5356 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:54,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:54,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:54,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:55,260 INFO L124 PetriNetUnfolderBase]: 4073/6878 cut-off events. [2024-06-28 01:01:55,261 INFO L125 PetriNetUnfolderBase]: For 257547/257677 co-relation queries the response was YES. [2024-06-28 01:01:55,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39596 conditions, 6878 events. 4073/6878 cut-off events. For 257547/257677 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 49181 event pairs, 802 based on Foata normal form. 131/6970 useless extension candidates. Maximal degree in co-relation 39449. Up to 5954 conditions per place. [2024-06-28 01:01:55,328 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 444 selfloop transitions, 44 changer transitions 0/503 dead transitions. [2024-06-28 01:01:55,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 503 transitions, 6500 flow [2024-06-28 01:01:55,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:01:55,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:01:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 302 transitions. [2024-06-28 01:01:55,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968379446640316 [2024-06-28 01:01:55,329 INFO L175 Difference]: Start difference. First operand has 363 places, 452 transitions, 5356 flow. Second operand 11 states and 302 transitions. [2024-06-28 01:01:55,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 503 transitions, 6500 flow [2024-06-28 01:01:56,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 503 transitions, 6356 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 01:01:56,715 INFO L231 Difference]: Finished difference. Result has 370 places, 455 transitions, 5352 flow [2024-06-28 01:01:56,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5212, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5352, PETRI_PLACES=370, PETRI_TRANSITIONS=455} [2024-06-28 01:01:56,716 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 320 predicate places. [2024-06-28 01:01:56,716 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 455 transitions, 5352 flow [2024-06-28 01:01:56,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:56,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:56,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:56,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 01:01:56,717 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:56,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:56,717 INFO L85 PathProgramCache]: Analyzing trace with hash 105400594, now seen corresponding path program 3 times [2024-06-28 01:01:56,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:56,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232573508] [2024-06-28 01:01:56,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:56,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:56,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:56,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232573508] [2024-06-28 01:01:56,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232573508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:56,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:56,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:56,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982345527] [2024-06-28 01:01:56,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:56,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:56,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:56,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:56,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:56,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:56,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 455 transitions, 5352 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:56,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:56,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:56,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:01:57,969 INFO L124 PetriNetUnfolderBase]: 4070/6906 cut-off events. [2024-06-28 01:01:57,969 INFO L125 PetriNetUnfolderBase]: For 259353/259483 co-relation queries the response was YES. [2024-06-28 01:01:58,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39473 conditions, 6906 events. 4070/6906 cut-off events. For 259353/259483 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 49644 event pairs, 808 based on Foata normal form. 131/6995 useless extension candidates. Maximal degree in co-relation 39325. Up to 5859 conditions per place. [2024-06-28 01:01:58,058 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 420 selfloop transitions, 66 changer transitions 0/501 dead transitions. [2024-06-28 01:01:58,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 501 transitions, 6608 flow [2024-06-28 01:01:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:01:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:01:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 286 transitions. [2024-06-28 01:01:58,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217391304347826 [2024-06-28 01:01:58,059 INFO L175 Difference]: Start difference. First operand has 370 places, 455 transitions, 5352 flow. Second operand 10 states and 286 transitions. [2024-06-28 01:01:58,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 501 transitions, 6608 flow [2024-06-28 01:01:59,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 501 transitions, 6448 flow, removed 27 selfloop flow, removed 11 redundant places. [2024-06-28 01:01:59,672 INFO L231 Difference]: Finished difference. Result has 369 places, 455 transitions, 5330 flow [2024-06-28 01:01:59,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5192, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5330, PETRI_PLACES=369, PETRI_TRANSITIONS=455} [2024-06-28 01:01:59,672 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 319 predicate places. [2024-06-28 01:01:59,673 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 455 transitions, 5330 flow [2024-06-28 01:01:59,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:59,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:01:59,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:01:59,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 01:01:59,673 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:01:59,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:01:59,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1597766988, now seen corresponding path program 1 times [2024-06-28 01:01:59,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:01:59,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137738947] [2024-06-28 01:01:59,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:01:59,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:01:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:01:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:01:59,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:01:59,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137738947] [2024-06-28 01:01:59,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137738947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:01:59,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:01:59,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:01:59,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653070261] [2024-06-28 01:01:59,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:01:59,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:01:59,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:01:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:01:59,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:01:59,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:01:59,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 455 transitions, 5330 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:01:59,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:01:59,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:01:59,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:01,115 INFO L124 PetriNetUnfolderBase]: 4272/7155 cut-off events. [2024-06-28 01:02:01,116 INFO L125 PetriNetUnfolderBase]: For 282618/282750 co-relation queries the response was YES. [2024-06-28 01:02:01,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40926 conditions, 7155 events. 4272/7155 cut-off events. For 282618/282750 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51298 event pairs, 693 based on Foata normal form. 138/7254 useless extension candidates. Maximal degree in co-relation 40779. Up to 5824 conditions per place. [2024-06-28 01:02:01,194 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 441 selfloop transitions, 53 changer transitions 0/509 dead transitions. [2024-06-28 01:02:01,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 509 transitions, 6719 flow [2024-06-28 01:02:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:01,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-28 01:02:01,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-06-28 01:02:01,195 INFO L175 Difference]: Start difference. First operand has 369 places, 455 transitions, 5330 flow. Second operand 8 states and 238 transitions. [2024-06-28 01:02:01,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 509 transitions, 6719 flow [2024-06-28 01:02:02,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 509 transitions, 6559 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-28 01:02:02,992 INFO L231 Difference]: Finished difference. Result has 369 places, 461 transitions, 5381 flow [2024-06-28 01:02:02,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5170, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5381, PETRI_PLACES=369, PETRI_TRANSITIONS=461} [2024-06-28 01:02:02,992 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 319 predicate places. [2024-06-28 01:02:02,992 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 461 transitions, 5381 flow [2024-06-28 01:02:02,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:02,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:02,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:02,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 01:02:02,993 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:02,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:02,994 INFO L85 PathProgramCache]: Analyzing trace with hash -152979632, now seen corresponding path program 2 times [2024-06-28 01:02:02,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:02,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942727625] [2024-06-28 01:02:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:02,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:03,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:03,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942727625] [2024-06-28 01:02:03,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942727625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:03,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:03,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:03,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919471990] [2024-06-28 01:02:03,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:03,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:03,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:03,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:03,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:03,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:03,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 461 transitions, 5381 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:03,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:03,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:03,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:04,280 INFO L124 PetriNetUnfolderBase]: 4400/7375 cut-off events. [2024-06-28 01:02:04,281 INFO L125 PetriNetUnfolderBase]: For 292059/292191 co-relation queries the response was YES. [2024-06-28 01:02:04,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42495 conditions, 7375 events. 4400/7375 cut-off events. For 292059/292191 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 53153 event pairs, 833 based on Foata normal form. 138/7472 useless extension candidates. Maximal degree in co-relation 42345. Up to 6293 conditions per place. [2024-06-28 01:02:04,367 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 445 selfloop transitions, 48 changer transitions 0/508 dead transitions. [2024-06-28 01:02:04,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 508 transitions, 6579 flow [2024-06-28 01:02:04,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-28 01:02:04,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-06-28 01:02:04,368 INFO L175 Difference]: Start difference. First operand has 369 places, 461 transitions, 5381 flow. Second operand 8 states and 234 transitions. [2024-06-28 01:02:04,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 508 transitions, 6579 flow [2024-06-28 01:02:06,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 508 transitions, 6464 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:06,352 INFO L231 Difference]: Finished difference. Result has 373 places, 465 transitions, 5438 flow [2024-06-28 01:02:06,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5438, PETRI_PLACES=373, PETRI_TRANSITIONS=465} [2024-06-28 01:02:06,353 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 323 predicate places. [2024-06-28 01:02:06,353 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 465 transitions, 5438 flow [2024-06-28 01:02:06,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:06,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:06,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:06,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 01:02:06,354 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:06,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:06,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1897397228, now seen corresponding path program 4 times [2024-06-28 01:02:06,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:06,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069113229] [2024-06-28 01:02:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:06,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:06,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:06,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069113229] [2024-06-28 01:02:06,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069113229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:06,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:06,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:06,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716651503] [2024-06-28 01:02:06,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:06,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:06,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:06,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 465 transitions, 5438 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:06,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:06,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:06,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:07,683 INFO L124 PetriNetUnfolderBase]: 4439/7539 cut-off events. [2024-06-28 01:02:07,684 INFO L125 PetriNetUnfolderBase]: For 290490/290621 co-relation queries the response was YES. [2024-06-28 01:02:07,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43093 conditions, 7539 events. 4439/7539 cut-off events. For 290490/290621 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 55037 event pairs, 835 based on Foata normal form. 129/7635 useless extension candidates. Maximal degree in co-relation 42942. Up to 6046 conditions per place. [2024-06-28 01:02:07,772 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 375 selfloop transitions, 130 changer transitions 0/520 dead transitions. [2024-06-28 01:02:07,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 520 transitions, 7456 flow [2024-06-28 01:02:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:07,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-06-28 01:02:07,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603260869565217 [2024-06-28 01:02:07,773 INFO L175 Difference]: Start difference. First operand has 373 places, 465 transitions, 5438 flow. Second operand 8 states and 243 transitions. [2024-06-28 01:02:07,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 520 transitions, 7456 flow [2024-06-28 01:02:09,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 520 transitions, 7352 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:09,654 INFO L231 Difference]: Finished difference. Result has 376 places, 477 transitions, 5830 flow [2024-06-28 01:02:09,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5334, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5830, PETRI_PLACES=376, PETRI_TRANSITIONS=477} [2024-06-28 01:02:09,654 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 326 predicate places. [2024-06-28 01:02:09,654 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 477 transitions, 5830 flow [2024-06-28 01:02:09,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:09,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:09,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:09,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 01:02:09,655 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:09,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:09,655 INFO L85 PathProgramCache]: Analyzing trace with hash 47173906, now seen corresponding path program 4 times [2024-06-28 01:02:09,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:09,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497674193] [2024-06-28 01:02:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:09,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:09,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:09,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497674193] [2024-06-28 01:02:09,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497674193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:09,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:09,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:09,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866916399] [2024-06-28 01:02:09,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:09,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:09,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:09,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:09,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:09,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 477 transitions, 5830 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:09,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:09,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:09,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:10,948 INFO L124 PetriNetUnfolderBase]: 4475/7494 cut-off events. [2024-06-28 01:02:10,949 INFO L125 PetriNetUnfolderBase]: For 304058/304191 co-relation queries the response was YES. [2024-06-28 01:02:11,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44308 conditions, 7494 events. 4475/7494 cut-off events. For 304058/304191 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 54182 event pairs, 810 based on Foata normal form. 133/7586 useless extension candidates. Maximal degree in co-relation 44156. Up to 6136 conditions per place. [2024-06-28 01:02:11,048 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 381 selfloop transitions, 132 changer transitions 0/528 dead transitions. [2024-06-28 01:02:11,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 528 transitions, 7675 flow [2024-06-28 01:02:11,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:11,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-28 01:02:11,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-06-28 01:02:11,050 INFO L175 Difference]: Start difference. First operand has 376 places, 477 transitions, 5830 flow. Second operand 8 states and 238 transitions. [2024-06-28 01:02:11,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 528 transitions, 7675 flow [2024-06-28 01:02:12,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 528 transitions, 7502 flow, removed 52 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:12,934 INFO L231 Difference]: Finished difference. Result has 383 places, 489 transitions, 6146 flow [2024-06-28 01:02:12,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5657, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6146, PETRI_PLACES=383, PETRI_TRANSITIONS=489} [2024-06-28 01:02:12,934 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 333 predicate places. [2024-06-28 01:02:12,934 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 489 transitions, 6146 flow [2024-06-28 01:02:12,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:12,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:12,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:12,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 01:02:12,936 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:12,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:12,936 INFO L85 PathProgramCache]: Analyzing trace with hash 246355540, now seen corresponding path program 5 times [2024-06-28 01:02:12,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:12,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132357051] [2024-06-28 01:02:12,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:12,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:13,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:13,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132357051] [2024-06-28 01:02:13,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132357051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:13,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:13,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:13,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343207427] [2024-06-28 01:02:13,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:13,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:13,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:13,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:13,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:13,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 489 transitions, 6146 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:13,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:13,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:13,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:14,303 INFO L124 PetriNetUnfolderBase]: 4486/7664 cut-off events. [2024-06-28 01:02:14,304 INFO L125 PetriNetUnfolderBase]: For 315928/316045 co-relation queries the response was YES. [2024-06-28 01:02:14,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45442 conditions, 7664 events. 4486/7664 cut-off events. For 315928/316045 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 56170 event pairs, 878 based on Foata normal form. 115/7744 useless extension candidates. Maximal degree in co-relation 45287. Up to 6100 conditions per place. [2024-06-28 01:02:14,399 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 379 selfloop transitions, 140 changer transitions 0/534 dead transitions. [2024-06-28 01:02:14,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 534 transitions, 7848 flow [2024-06-28 01:02:14,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-28 01:02:14,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654891304347826 [2024-06-28 01:02:14,401 INFO L175 Difference]: Start difference. First operand has 383 places, 489 transitions, 6146 flow. Second operand 8 states and 241 transitions. [2024-06-28 01:02:14,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 534 transitions, 7848 flow [2024-06-28 01:02:16,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 534 transitions, 7684 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:16,522 INFO L231 Difference]: Finished difference. Result has 389 places, 492 transitions, 6306 flow [2024-06-28 01:02:16,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5982, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6306, PETRI_PLACES=389, PETRI_TRANSITIONS=492} [2024-06-28 01:02:16,523 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 339 predicate places. [2024-06-28 01:02:16,523 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 492 transitions, 6306 flow [2024-06-28 01:02:16,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:16,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:16,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:16,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 01:02:16,525 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:16,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:16,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1242541634, now seen corresponding path program 6 times [2024-06-28 01:02:16,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:16,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883884595] [2024-06-28 01:02:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:16,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:16,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:16,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883884595] [2024-06-28 01:02:16,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883884595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:16,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:16,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:16,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981871956] [2024-06-28 01:02:16,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:16,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:16,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:16,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:16,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:16,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:16,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 492 transitions, 6306 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:16,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:16,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:16,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:17,954 INFO L124 PetriNetUnfolderBase]: 4497/7778 cut-off events. [2024-06-28 01:02:17,955 INFO L125 PetriNetUnfolderBase]: For 323182/323299 co-relation queries the response was YES. [2024-06-28 01:02:18,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46120 conditions, 7778 events. 4497/7778 cut-off events. For 323182/323299 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 57596 event pairs, 975 based on Foata normal form. 115/7858 useless extension candidates. Maximal degree in co-relation 45963. Up to 6112 conditions per place. [2024-06-28 01:02:18,056 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 376 selfloop transitions, 142 changer transitions 0/533 dead transitions. [2024-06-28 01:02:18,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 533 transitions, 7834 flow [2024-06-28 01:02:18,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:18,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-28 01:02:18,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440217391304348 [2024-06-28 01:02:18,070 INFO L175 Difference]: Start difference. First operand has 389 places, 492 transitions, 6306 flow. Second operand 8 states and 237 transitions. [2024-06-28 01:02:18,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 533 transitions, 7834 flow [2024-06-28 01:02:20,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 533 transitions, 7504 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 01:02:20,822 INFO L231 Difference]: Finished difference. Result has 391 places, 495 transitions, 6310 flow [2024-06-28 01:02:20,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5986, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6310, PETRI_PLACES=391, PETRI_TRANSITIONS=495} [2024-06-28 01:02:20,823 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 341 predicate places. [2024-06-28 01:02:20,824 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 495 transitions, 6310 flow [2024-06-28 01:02:20,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:20,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:20,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:20,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 01:02:20,826 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:20,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:20,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1032884294, now seen corresponding path program 7 times [2024-06-28 01:02:20,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:20,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12139384] [2024-06-28 01:02:20,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:20,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:20,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:20,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12139384] [2024-06-28 01:02:20,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12139384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:20,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:20,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:20,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487211806] [2024-06-28 01:02:20,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:20,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:20,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:20,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:20,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:20,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:20,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 495 transitions, 6310 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:20,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:20,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:20,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:22,615 INFO L124 PetriNetUnfolderBase]: 4508/7656 cut-off events. [2024-06-28 01:02:22,615 INFO L125 PetriNetUnfolderBase]: For 326647/326780 co-relation queries the response was YES. [2024-06-28 01:02:22,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46047 conditions, 7656 events. 4508/7656 cut-off events. For 326647/326780 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 55892 event pairs, 841 based on Foata normal form. 133/7751 useless extension candidates. Maximal degree in co-relation 45889. Up to 6455 conditions per place. [2024-06-28 01:02:22,717 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 445 selfloop transitions, 74 changer transitions 0/534 dead transitions. [2024-06-28 01:02:22,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 534 transitions, 7484 flow [2024-06-28 01:02:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:22,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-28 01:02:22,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277173913043478 [2024-06-28 01:02:22,718 INFO L175 Difference]: Start difference. First operand has 391 places, 495 transitions, 6310 flow. Second operand 8 states and 231 transitions. [2024-06-28 01:02:22,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 534 transitions, 7484 flow [2024-06-28 01:02:25,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 534 transitions, 7222 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 01:02:25,534 INFO L231 Difference]: Finished difference. Result has 394 places, 498 transitions, 6248 flow [2024-06-28 01:02:25,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6051, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6248, PETRI_PLACES=394, PETRI_TRANSITIONS=498} [2024-06-28 01:02:25,535 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 344 predicate places. [2024-06-28 01:02:25,535 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 498 transitions, 6248 flow [2024-06-28 01:02:25,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:25,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:25,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:25,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 01:02:25,535 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:25,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:25,543 INFO L85 PathProgramCache]: Analyzing trace with hash 202293052, now seen corresponding path program 5 times [2024-06-28 01:02:25,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:25,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066137531] [2024-06-28 01:02:25,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:25,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:25,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:25,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066137531] [2024-06-28 01:02:25,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066137531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:25,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:25,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:25,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058597245] [2024-06-28 01:02:25,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:25,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:25,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:25,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:25,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:25,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:25,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 498 transitions, 6248 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:25,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:25,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:25,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:27,062 INFO L124 PetriNetUnfolderBase]: 4544/7616 cut-off events. [2024-06-28 01:02:27,062 INFO L125 PetriNetUnfolderBase]: For 335793/335926 co-relation queries the response was YES. [2024-06-28 01:02:27,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46173 conditions, 7616 events. 4544/7616 cut-off events. For 335793/335926 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 55188 event pairs, 813 based on Foata normal form. 133/7706 useless extension candidates. Maximal degree in co-relation 46014. Up to 6216 conditions per place. [2024-06-28 01:02:27,159 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 394 selfloop transitions, 134 changer transitions 0/543 dead transitions. [2024-06-28 01:02:27,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 543 transitions, 8053 flow [2024-06-28 01:02:27,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-28 01:02:27,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-28 01:02:27,161 INFO L175 Difference]: Start difference. First operand has 394 places, 498 transitions, 6248 flow. Second operand 8 states and 236 transitions. [2024-06-28 01:02:27,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 543 transitions, 8053 flow [2024-06-28 01:02:30,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 543 transitions, 7871 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 01:02:30,212 INFO L231 Difference]: Finished difference. Result has 396 places, 507 transitions, 6471 flow [2024-06-28 01:02:30,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6074, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6471, PETRI_PLACES=396, PETRI_TRANSITIONS=507} [2024-06-28 01:02:30,212 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 346 predicate places. [2024-06-28 01:02:30,212 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 507 transitions, 6471 flow [2024-06-28 01:02:30,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:30,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:30,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:30,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 01:02:30,213 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:30,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:30,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1357832804, now seen corresponding path program 8 times [2024-06-28 01:02:30,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:30,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716114826] [2024-06-28 01:02:30,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:30,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:30,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:30,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716114826] [2024-06-28 01:02:30,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716114826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:30,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:30,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:30,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046507093] [2024-06-28 01:02:30,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:30,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:30,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:30,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:30,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:30,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:30,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 507 transitions, 6471 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:30,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:30,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:30,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:31,585 INFO L124 PetriNetUnfolderBase]: 4569/7656 cut-off events. [2024-06-28 01:02:31,586 INFO L125 PetriNetUnfolderBase]: For 347306/347439 co-relation queries the response was YES. [2024-06-28 01:02:31,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46769 conditions, 7656 events. 4569/7656 cut-off events. For 347306/347439 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 55598 event pairs, 796 based on Foata normal form. 133/7752 useless extension candidates. Maximal degree in co-relation 46609. Up to 6506 conditions per place. [2024-06-28 01:02:31,684 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 445 selfloop transitions, 87 changer transitions 0/547 dead transitions. [2024-06-28 01:02:31,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 547 transitions, 7885 flow [2024-06-28 01:02:31,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-28 01:02:31,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 01:02:31,685 INFO L175 Difference]: Start difference. First operand has 396 places, 507 transitions, 6471 flow. Second operand 8 states and 230 transitions. [2024-06-28 01:02:31,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 547 transitions, 7885 flow [2024-06-28 01:02:34,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 547 transitions, 7645 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:34,671 INFO L231 Difference]: Finished difference. Result has 401 places, 513 transitions, 6519 flow [2024-06-28 01:02:34,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6231, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6519, PETRI_PLACES=401, PETRI_TRANSITIONS=513} [2024-06-28 01:02:34,672 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 351 predicate places. [2024-06-28 01:02:34,672 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 513 transitions, 6519 flow [2024-06-28 01:02:34,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:34,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:34,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:34,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 01:02:34,672 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:34,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:34,673 INFO L85 PathProgramCache]: Analyzing trace with hash 371914840, now seen corresponding path program 9 times [2024-06-28 01:02:34,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:34,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38391895] [2024-06-28 01:02:34,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:34,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:34,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:34,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38391895] [2024-06-28 01:02:34,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38391895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:34,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:34,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:34,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026504723] [2024-06-28 01:02:34,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:34,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:34,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:34,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:34,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:34,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:34,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 513 transitions, 6519 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:34,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:34,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:34,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:36,670 INFO L124 PetriNetUnfolderBase]: 4566/7751 cut-off events. [2024-06-28 01:02:36,670 INFO L125 PetriNetUnfolderBase]: For 349863/349996 co-relation queries the response was YES. [2024-06-28 01:02:36,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46713 conditions, 7751 events. 4566/7751 cut-off events. For 349863/349996 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 56721 event pairs, 844 based on Foata normal form. 133/7848 useless extension candidates. Maximal degree in co-relation 46551. Up to 6503 conditions per place. [2024-06-28 01:02:36,763 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 449 selfloop transitions, 88 changer transitions 0/552 dead transitions. [2024-06-28 01:02:36,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 552 transitions, 7697 flow [2024-06-28 01:02:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:02:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:02:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-06-28 01:02:36,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6021739130434782 [2024-06-28 01:02:36,765 INFO L175 Difference]: Start difference. First operand has 401 places, 513 transitions, 6519 flow. Second operand 10 states and 277 transitions. [2024-06-28 01:02:36,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 552 transitions, 7697 flow [2024-06-28 01:02:39,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 552 transitions, 7531 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 01:02:39,702 INFO L231 Difference]: Finished difference. Result has 407 places, 513 transitions, 6535 flow [2024-06-28 01:02:39,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6353, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6535, PETRI_PLACES=407, PETRI_TRANSITIONS=513} [2024-06-28 01:02:39,703 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 357 predicate places. [2024-06-28 01:02:39,703 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 513 transitions, 6535 flow [2024-06-28 01:02:39,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:39,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:39,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:39,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 01:02:39,704 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:39,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:39,704 INFO L85 PathProgramCache]: Analyzing trace with hash 213401672, now seen corresponding path program 6 times [2024-06-28 01:02:39,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:39,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635437262] [2024-06-28 01:02:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:39,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:39,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:39,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635437262] [2024-06-28 01:02:39,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635437262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:39,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:39,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:39,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422966090] [2024-06-28 01:02:39,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:39,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:39,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:39,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:39,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:39,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:39,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 513 transitions, 6535 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:39,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:39,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:39,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:41,517 INFO L124 PetriNetUnfolderBase]: 4563/7823 cut-off events. [2024-06-28 01:02:41,517 INFO L125 PetriNetUnfolderBase]: For 354582/354707 co-relation queries the response was YES. [2024-06-28 01:02:41,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46715 conditions, 7823 events. 4563/7823 cut-off events. For 354582/354707 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 57713 event pairs, 905 based on Foata normal form. 125/7902 useless extension candidates. Maximal degree in co-relation 46553. Up to 6243 conditions per place. [2024-06-28 01:02:41,704 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 397 selfloop transitions, 136 changer transitions 0/548 dead transitions. [2024-06-28 01:02:41,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 548 transitions, 8061 flow [2024-06-28 01:02:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-28 01:02:41,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-06-28 01:02:41,706 INFO L175 Difference]: Start difference. First operand has 407 places, 513 transitions, 6535 flow. Second operand 8 states and 234 transitions. [2024-06-28 01:02:41,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 548 transitions, 8061 flow [2024-06-28 01:02:44,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 548 transitions, 7835 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-28 01:02:44,931 INFO L231 Difference]: Finished difference. Result has 406 places, 513 transitions, 6587 flow [2024-06-28 01:02:44,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6309, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6587, PETRI_PLACES=406, PETRI_TRANSITIONS=513} [2024-06-28 01:02:44,932 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 356 predicate places. [2024-06-28 01:02:44,932 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 513 transitions, 6587 flow [2024-06-28 01:02:44,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:44,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:44,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:44,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 01:02:44,933 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:44,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:44,933 INFO L85 PathProgramCache]: Analyzing trace with hash -975098994, now seen corresponding path program 7 times [2024-06-28 01:02:44,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:44,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997260634] [2024-06-28 01:02:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:44,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:45,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:45,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997260634] [2024-06-28 01:02:45,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997260634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:45,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:45,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:45,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448776438] [2024-06-28 01:02:45,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:45,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:45,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:45,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:45,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:45,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:45,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 513 transitions, 6587 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:45,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:45,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:45,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:46,808 INFO L124 PetriNetUnfolderBase]: 4663/7963 cut-off events. [2024-06-28 01:02:46,808 INFO L125 PetriNetUnfolderBase]: For 380530/380653 co-relation queries the response was YES. [2024-06-28 01:02:46,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48401 conditions, 7963 events. 4663/7963 cut-off events. For 380530/380653 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 58749 event pairs, 912 based on Foata normal form. 123/8039 useless extension candidates. Maximal degree in co-relation 48238. Up to 6339 conditions per place. [2024-06-28 01:02:46,915 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 396 selfloop transitions, 159 changer transitions 0/570 dead transitions. [2024-06-28 01:02:46,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 570 transitions, 8740 flow [2024-06-28 01:02:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-28 01:02:46,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-06-28 01:02:46,917 INFO L175 Difference]: Start difference. First operand has 406 places, 513 transitions, 6587 flow. Second operand 8 states and 232 transitions. [2024-06-28 01:02:46,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 570 transitions, 8740 flow [2024-06-28 01:02:50,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 570 transitions, 8416 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 01:02:50,193 INFO L231 Difference]: Finished difference. Result has 408 places, 537 transitions, 7031 flow [2024-06-28 01:02:50,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6305, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7031, PETRI_PLACES=408, PETRI_TRANSITIONS=537} [2024-06-28 01:02:50,193 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 358 predicate places. [2024-06-28 01:02:50,193 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 537 transitions, 7031 flow [2024-06-28 01:02:50,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:50,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:50,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:50,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 01:02:50,194 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:50,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:50,194 INFO L85 PathProgramCache]: Analyzing trace with hash -979860594, now seen corresponding path program 8 times [2024-06-28 01:02:50,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:50,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250782268] [2024-06-28 01:02:50,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:50,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:50,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:50,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250782268] [2024-06-28 01:02:50,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250782268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:50,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:50,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:50,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65896106] [2024-06-28 01:02:50,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:50,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:50,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:50,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:50,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:50,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:50,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 537 transitions, 7031 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:50,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:50,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:50,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:52,006 INFO L124 PetriNetUnfolderBase]: 4685/7974 cut-off events. [2024-06-28 01:02:52,007 INFO L125 PetriNetUnfolderBase]: For 385798/385926 co-relation queries the response was YES. [2024-06-28 01:02:52,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48825 conditions, 7974 events. 4685/7974 cut-off events. For 385798/385926 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 58698 event pairs, 935 based on Foata normal form. 129/8053 useless extension candidates. Maximal degree in co-relation 48660. Up to 6811 conditions per place. [2024-06-28 01:02:52,118 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 509 selfloop transitions, 49 changer transitions 0/573 dead transitions. [2024-06-28 01:02:52,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 573 transitions, 8331 flow [2024-06-28 01:02:52,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:02:52,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:02:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-28 01:02:52,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-06-28 01:02:52,119 INFO L175 Difference]: Start difference. First operand has 408 places, 537 transitions, 7031 flow. Second operand 8 states and 224 transitions. [2024-06-28 01:02:52,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 573 transitions, 8331 flow [2024-06-28 01:02:55,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 573 transitions, 8086 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-28 01:02:55,296 INFO L231 Difference]: Finished difference. Result has 414 places, 543 transitions, 7000 flow [2024-06-28 01:02:55,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6801, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7000, PETRI_PLACES=414, PETRI_TRANSITIONS=543} [2024-06-28 01:02:55,297 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 364 predicate places. [2024-06-28 01:02:55,297 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 543 transitions, 7000 flow [2024-06-28 01:02:55,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:55,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:02:55,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:02:55,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 01:02:55,298 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:02:55,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:02:55,298 INFO L85 PathProgramCache]: Analyzing trace with hash -217675706, now seen corresponding path program 10 times [2024-06-28 01:02:55,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:02:55,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825517625] [2024-06-28 01:02:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:02:55,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:02:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:02:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:02:55,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:02:55,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825517625] [2024-06-28 01:02:55,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825517625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:02:55,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:02:55,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:02:55,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055542269] [2024-06-28 01:02:55,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:02:55,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:02:55,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:02:55,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:02:55,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:02:55,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:02:55,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 543 transitions, 7000 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:02:55,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:02:55,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:02:55,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:02:57,266 INFO L124 PetriNetUnfolderBase]: 4738/8177 cut-off events. [2024-06-28 01:02:57,266 INFO L125 PetriNetUnfolderBase]: For 408880/409003 co-relation queries the response was YES. [2024-06-28 01:02:57,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49345 conditions, 8177 events. 4738/8177 cut-off events. For 408880/409003 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 61004 event pairs, 986 based on Foata normal form. 123/8259 useless extension candidates. Maximal degree in co-relation 49179. Up to 6672 conditions per place. [2024-06-28 01:02:57,373 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 466 selfloop transitions, 116 changer transitions 0/597 dead transitions. [2024-06-28 01:02:57,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 597 transitions, 9048 flow [2024-06-28 01:02:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:02:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:02:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 302 transitions. [2024-06-28 01:02:57,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968379446640316 [2024-06-28 01:02:57,375 INFO L175 Difference]: Start difference. First operand has 414 places, 543 transitions, 7000 flow. Second operand 11 states and 302 transitions. [2024-06-28 01:02:57,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 597 transitions, 9048 flow [2024-06-28 01:03:01,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 597 transitions, 8934 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 01:03:01,240 INFO L231 Difference]: Finished difference. Result has 423 places, 555 transitions, 7393 flow [2024-06-28 01:03:01,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6886, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7393, PETRI_PLACES=423, PETRI_TRANSITIONS=555} [2024-06-28 01:03:01,252 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 373 predicate places. [2024-06-28 01:03:01,253 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 555 transitions, 7393 flow [2024-06-28 01:03:01,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:01,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:01,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:01,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 01:03:01,253 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:01,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:01,254 INFO L85 PathProgramCache]: Analyzing trace with hash 537554160, now seen corresponding path program 9 times [2024-06-28 01:03:01,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:01,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240427377] [2024-06-28 01:03:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:01,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:01,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:01,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240427377] [2024-06-28 01:03:01,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240427377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:01,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:01,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:03:01,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350397198] [2024-06-28 01:03:01,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:01,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:03:01,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:01,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:03:01,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:03:01,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:03:01,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 555 transitions, 7393 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:01,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:01,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:03:01,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:03,144 INFO L124 PetriNetUnfolderBase]: 4749/8125 cut-off events. [2024-06-28 01:03:03,144 INFO L125 PetriNetUnfolderBase]: For 418050/418173 co-relation queries the response was YES. [2024-06-28 01:03:03,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49904 conditions, 8125 events. 4749/8125 cut-off events. For 418050/418173 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 60147 event pairs, 923 based on Foata normal form. 123/8195 useless extension candidates. Maximal degree in co-relation 49734. Up to 6443 conditions per place. [2024-06-28 01:03:03,241 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 416 selfloop transitions, 161 changer transitions 0/592 dead transitions. [2024-06-28 01:03:03,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 592 transitions, 9443 flow [2024-06-28 01:03:03,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:03:03,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:03:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-28 01:03:03,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-06-28 01:03:03,242 INFO L175 Difference]: Start difference. First operand has 423 places, 555 transitions, 7393 flow. Second operand 8 states and 234 transitions. [2024-06-28 01:03:03,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 592 transitions, 9443 flow [2024-06-28 01:03:06,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 592 transitions, 9186 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-28 01:03:06,204 INFO L231 Difference]: Finished difference. Result has 426 places, 558 transitions, 7504 flow [2024-06-28 01:03:06,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7136, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7504, PETRI_PLACES=426, PETRI_TRANSITIONS=558} [2024-06-28 01:03:06,205 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 376 predicate places. [2024-06-28 01:03:06,205 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 558 transitions, 7504 flow [2024-06-28 01:03:06,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:06,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:06,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:06,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 01:03:06,206 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:06,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:06,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1203000144, now seen corresponding path program 10 times [2024-06-28 01:03:06,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:06,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063353427] [2024-06-28 01:03:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:06,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:06,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:06,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063353427] [2024-06-28 01:03:06,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063353427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:06,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:06,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:03:06,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107303572] [2024-06-28 01:03:06,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:06,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:03:06,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:06,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:03:06,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:03:06,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:03:06,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 558 transitions, 7504 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:06,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:06,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:03:06,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:08,136 INFO L124 PetriNetUnfolderBase]: 4746/8120 cut-off events. [2024-06-28 01:03:08,136 INFO L125 PetriNetUnfolderBase]: For 422441/422564 co-relation queries the response was YES. [2024-06-28 01:03:08,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49837 conditions, 8120 events. 4746/8120 cut-off events. For 422441/422564 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 60146 event pairs, 922 based on Foata normal form. 123/8190 useless extension candidates. Maximal degree in co-relation 49668. Up to 6440 conditions per place. [2024-06-28 01:03:08,228 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 415 selfloop transitions, 162 changer transitions 0/592 dead transitions. [2024-06-28 01:03:08,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 592 transitions, 9522 flow [2024-06-28 01:03:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:03:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:03:08,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-28 01:03:08,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-06-28 01:03:08,230 INFO L175 Difference]: Start difference. First operand has 426 places, 558 transitions, 7504 flow. Second operand 8 states and 234 transitions. [2024-06-28 01:03:08,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 592 transitions, 9522 flow [2024-06-28 01:03:11,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 592 transitions, 9258 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-28 01:03:11,017 INFO L231 Difference]: Finished difference. Result has 431 places, 558 transitions, 7570 flow [2024-06-28 01:03:11,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7240, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7570, PETRI_PLACES=431, PETRI_TRANSITIONS=558} [2024-06-28 01:03:11,027 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 381 predicate places. [2024-06-28 01:03:11,027 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 558 transitions, 7570 flow [2024-06-28 01:03:11,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:11,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:11,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:11,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 01:03:11,028 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:11,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:11,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1394920956, now seen corresponding path program 11 times [2024-06-28 01:03:11,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:11,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132951140] [2024-06-28 01:03:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:11,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:11,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:11,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132951140] [2024-06-28 01:03:11,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132951140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:11,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:11,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:03:11,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520291365] [2024-06-28 01:03:11,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:11,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:03:11,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:11,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:03:11,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:03:11,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:03:11,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 558 transitions, 7570 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:11,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:11,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:03:11,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:12,971 INFO L124 PetriNetUnfolderBase]: 4743/8097 cut-off events. [2024-06-28 01:03:12,971 INFO L125 PetriNetUnfolderBase]: For 425543/425638 co-relation queries the response was YES. [2024-06-28 01:03:13,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49824 conditions, 8097 events. 4743/8097 cut-off events. For 425543/425638 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 60286 event pairs, 1425 based on Foata normal form. 96/8103 useless extension candidates. Maximal degree in co-relation 49654. Up to 6868 conditions per place. [2024-06-28 01:03:13,070 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 523 selfloop transitions, 57 changer transitions 0/595 dead transitions. [2024-06-28 01:03:13,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 595 transitions, 9024 flow [2024-06-28 01:03:13,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:03:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:03:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 275 transitions. [2024-06-28 01:03:13,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-06-28 01:03:13,072 INFO L175 Difference]: Start difference. First operand has 431 places, 558 transitions, 7570 flow. Second operand 10 states and 275 transitions. [2024-06-28 01:03:13,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 595 transitions, 9024 flow [2024-06-28 01:03:16,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 595 transitions, 8686 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 01:03:16,556 INFO L231 Difference]: Finished difference. Result has 435 places, 558 transitions, 7352 flow [2024-06-28 01:03:16,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7232, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7352, PETRI_PLACES=435, PETRI_TRANSITIONS=558} [2024-06-28 01:03:16,556 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 385 predicate places. [2024-06-28 01:03:16,556 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 558 transitions, 7352 flow [2024-06-28 01:03:16,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:16,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:16,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:16,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 01:03:16,557 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:16,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:16,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1613470746, now seen corresponding path program 12 times [2024-06-28 01:03:16,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:16,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131945607] [2024-06-28 01:03:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:16,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:16,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:16,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131945607] [2024-06-28 01:03:16,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131945607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:16,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:16,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:03:16,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162099918] [2024-06-28 01:03:16,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:16,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:03:16,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:16,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:03:16,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:03:16,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:03:16,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 558 transitions, 7352 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:16,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:16,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:03:16,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:18,415 INFO L124 PetriNetUnfolderBase]: 4740/8086 cut-off events. [2024-06-28 01:03:18,416 INFO L125 PetriNetUnfolderBase]: For 424935/425031 co-relation queries the response was YES. [2024-06-28 01:03:18,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49292 conditions, 8086 events. 4740/8086 cut-off events. For 424935/425031 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 60142 event pairs, 1417 based on Foata normal form. 97/8095 useless extension candidates. Maximal degree in co-relation 49121. Up to 6865 conditions per place. [2024-06-28 01:03:18,515 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 517 selfloop transitions, 56 changer transitions 0/588 dead transitions. [2024-06-28 01:03:18,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 588 transitions, 8578 flow [2024-06-28 01:03:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:03:18,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:03:18,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-28 01:03:18,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-06-28 01:03:18,516 INFO L175 Difference]: Start difference. First operand has 435 places, 558 transitions, 7352 flow. Second operand 8 states and 226 transitions. [2024-06-28 01:03:18,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 588 transitions, 8578 flow [2024-06-28 01:03:21,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 588 transitions, 8410 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 01:03:21,504 INFO L231 Difference]: Finished difference. Result has 437 places, 558 transitions, 7302 flow [2024-06-28 01:03:21,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7184, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7302, PETRI_PLACES=437, PETRI_TRANSITIONS=558} [2024-06-28 01:03:21,504 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 387 predicate places. [2024-06-28 01:03:21,504 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 558 transitions, 7302 flow [2024-06-28 01:03:21,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:21,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:21,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:21,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 01:03:21,505 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:21,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:21,506 INFO L85 PathProgramCache]: Analyzing trace with hash -217468316, now seen corresponding path program 11 times [2024-06-28 01:03:21,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:21,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206671275] [2024-06-28 01:03:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:21,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:21,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:21,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206671275] [2024-06-28 01:03:21,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206671275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:21,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:21,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:03:21,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294722930] [2024-06-28 01:03:21,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:21,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:03:21,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:21,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:03:21,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:03:21,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:03:21,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 558 transitions, 7302 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:21,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:21,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:03:21,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:23,305 INFO L124 PetriNetUnfolderBase]: 4737/8039 cut-off events. [2024-06-28 01:03:23,306 INFO L125 PetriNetUnfolderBase]: For 425201/425334 co-relation queries the response was YES. [2024-06-28 01:03:23,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49044 conditions, 8039 events. 4737/8039 cut-off events. For 425201/425334 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 59147 event pairs, 845 based on Foata normal form. 133/8136 useless extension candidates. Maximal degree in co-relation 48872. Up to 6672 conditions per place. [2024-06-28 01:03:23,408 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 463 selfloop transitions, 115 changer transitions 0/593 dead transitions. [2024-06-28 01:03:23,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 593 transitions, 8950 flow [2024-06-28 01:03:23,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:03:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:03:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-06-28 01:03:23,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-28 01:03:23,409 INFO L175 Difference]: Start difference. First operand has 437 places, 558 transitions, 7302 flow. Second operand 9 states and 253 transitions. [2024-06-28 01:03:23,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 593 transitions, 8950 flow [2024-06-28 01:03:26,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 593 transitions, 8814 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 01:03:26,619 INFO L231 Difference]: Finished difference. Result has 439 places, 558 transitions, 7402 flow [2024-06-28 01:03:26,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7166, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7402, PETRI_PLACES=439, PETRI_TRANSITIONS=558} [2024-06-28 01:03:26,620 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 389 predicate places. [2024-06-28 01:03:26,620 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 558 transitions, 7402 flow [2024-06-28 01:03:26,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:26,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:26,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:26,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-28 01:03:26,621 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:26,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:26,621 INFO L85 PathProgramCache]: Analyzing trace with hash -223182236, now seen corresponding path program 12 times [2024-06-28 01:03:26,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:26,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594103531] [2024-06-28 01:03:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:26,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:26,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:26,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594103531] [2024-06-28 01:03:26,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594103531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:26,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:26,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:03:26,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693605696] [2024-06-28 01:03:26,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:26,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:03:26,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:26,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:03:26,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:03:26,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:03:26,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 558 transitions, 7402 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:26,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:26,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:03:26,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:28,579 INFO L124 PetriNetUnfolderBase]: 4734/8013 cut-off events. [2024-06-28 01:03:28,580 INFO L125 PetriNetUnfolderBase]: For 429037/429132 co-relation queries the response was YES. [2024-06-28 01:03:28,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49242 conditions, 8013 events. 4734/8013 cut-off events. For 429037/429132 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 59129 event pairs, 1462 based on Foata normal form. 96/8032 useless extension candidates. Maximal degree in co-relation 49069. Up to 6938 conditions per place. [2024-06-28 01:03:28,685 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 542 selfloop transitions, 31 changer transitions 0/588 dead transitions. [2024-06-28 01:03:28,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 588 transitions, 8628 flow [2024-06-28 01:03:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:03:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:03:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-28 01:03:28,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005434782608695 [2024-06-28 01:03:28,686 INFO L175 Difference]: Start difference. First operand has 439 places, 558 transitions, 7402 flow. Second operand 8 states and 221 transitions. [2024-06-28 01:03:28,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 588 transitions, 8628 flow [2024-06-28 01:03:32,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 588 transitions, 8374 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 01:03:32,315 INFO L231 Difference]: Finished difference. Result has 439 places, 558 transitions, 7216 flow [2024-06-28 01:03:32,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7148, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7216, PETRI_PLACES=439, PETRI_TRANSITIONS=558} [2024-06-28 01:03:32,316 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 389 predicate places. [2024-06-28 01:03:32,316 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 558 transitions, 7216 flow [2024-06-28 01:03:32,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:32,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:32,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:32,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-28 01:03:32,317 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:32,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:32,317 INFO L85 PathProgramCache]: Analyzing trace with hash -365377376, now seen corresponding path program 3 times [2024-06-28 01:03:32,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:32,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247695760] [2024-06-28 01:03:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:32,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:32,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:32,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247695760] [2024-06-28 01:03:32,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247695760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:32,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:32,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:03:32,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103639321] [2024-06-28 01:03:32,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:32,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:03:32,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:32,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:03:32,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:03:32,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:03:32,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 558 transitions, 7216 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:32,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:32,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:03:32,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:34,094 INFO L124 PetriNetUnfolderBase]: 4798/8156 cut-off events. [2024-06-28 01:03:34,094 INFO L125 PetriNetUnfolderBase]: For 460976/461104 co-relation queries the response was YES. [2024-06-28 01:03:34,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49504 conditions, 8156 events. 4798/8156 cut-off events. For 460976/461104 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 60218 event pairs, 936 based on Foata normal form. 134/8239 useless extension candidates. Maximal degree in co-relation 49330. Up to 6833 conditions per place. [2024-06-28 01:03:34,192 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 535 selfloop transitions, 48 changer transitions 0/598 dead transitions. [2024-06-28 01:03:34,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 598 transitions, 8575 flow [2024-06-28 01:03:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:03:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:03:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-28 01:03:34,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222826086956522 [2024-06-28 01:03:34,193 INFO L175 Difference]: Start difference. First operand has 439 places, 558 transitions, 7216 flow. Second operand 8 states and 229 transitions. [2024-06-28 01:03:34,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 598 transitions, 8575 flow [2024-06-28 01:03:37,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 598 transitions, 8489 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 01:03:37,356 INFO L231 Difference]: Finished difference. Result has 441 places, 561 transitions, 7291 flow [2024-06-28 01:03:37,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7130, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7291, PETRI_PLACES=441, PETRI_TRANSITIONS=561} [2024-06-28 01:03:37,356 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 391 predicate places. [2024-06-28 01:03:37,356 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 561 transitions, 7291 flow [2024-06-28 01:03:37,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:37,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:37,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:37,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-28 01:03:37,357 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:37,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:37,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1904072334, now seen corresponding path program 1 times [2024-06-28 01:03:37,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:37,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253057085] [2024-06-28 01:03:37,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:37,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:37,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:37,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253057085] [2024-06-28 01:03:37,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253057085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:37,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:37,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:03:37,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802825008] [2024-06-28 01:03:37,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:37,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:03:37,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:37,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:03:37,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:03:37,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:03:37,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 561 transitions, 7291 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:37,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:37,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:03:37,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:39,364 INFO L124 PetriNetUnfolderBase]: 4839/8340 cut-off events. [2024-06-28 01:03:39,365 INFO L125 PetriNetUnfolderBase]: For 462777/462908 co-relation queries the response was YES. [2024-06-28 01:03:39,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50585 conditions, 8340 events. 4839/8340 cut-off events. For 462777/462908 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 62321 event pairs, 995 based on Foata normal form. 130/8426 useless extension candidates. Maximal degree in co-relation 50409. Up to 6846 conditions per place. [2024-06-28 01:03:39,465 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 498 selfloop transitions, 94 changer transitions 0/607 dead transitions. [2024-06-28 01:03:39,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 607 transitions, 8875 flow [2024-06-28 01:03:39,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:03:39,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:03:39,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-06-28 01:03:39,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-06-28 01:03:39,467 INFO L175 Difference]: Start difference. First operand has 441 places, 561 transitions, 7291 flow. Second operand 8 states and 236 transitions. [2024-06-28 01:03:39,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 607 transitions, 8875 flow [2024-06-28 01:03:42,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 607 transitions, 8765 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 01:03:42,489 INFO L231 Difference]: Finished difference. Result has 444 places, 565 transitions, 7462 flow [2024-06-28 01:03:42,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7462, PETRI_PLACES=444, PETRI_TRANSITIONS=565} [2024-06-28 01:03:42,490 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 394 predicate places. [2024-06-28 01:03:42,490 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 565 transitions, 7462 flow [2024-06-28 01:03:42,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:42,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:42,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:42,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-28 01:03:42,491 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:42,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:42,491 INFO L85 PathProgramCache]: Analyzing trace with hash 254042486, now seen corresponding path program 2 times [2024-06-28 01:03:42,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:42,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277950376] [2024-06-28 01:03:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:42,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:42,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:42,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277950376] [2024-06-28 01:03:42,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277950376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:42,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:42,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:03:42,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861925956] [2024-06-28 01:03:42,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:42,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:03:42,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:42,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:03:42,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:03:42,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:03:42,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 565 transitions, 7462 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:42,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:42,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:03:42,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:44,384 INFO L124 PetriNetUnfolderBase]: 4857/8202 cut-off events. [2024-06-28 01:03:44,384 INFO L125 PetriNetUnfolderBase]: For 469275/469406 co-relation queries the response was YES. [2024-06-28 01:03:44,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50882 conditions, 8202 events. 4857/8202 cut-off events. For 469275/469406 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 60381 event pairs, 871 based on Foata normal form. 130/8290 useless extension candidates. Maximal degree in co-relation 50705. Up to 6925 conditions per place. [2024-06-28 01:03:44,479 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 498 selfloop transitions, 91 changer transitions 0/604 dead transitions. [2024-06-28 01:03:44,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 604 transitions, 8784 flow [2024-06-28 01:03:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:03:44,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:03:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-28 01:03:44,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277173913043478 [2024-06-28 01:03:44,480 INFO L175 Difference]: Start difference. First operand has 444 places, 565 transitions, 7462 flow. Second operand 8 states and 231 transitions. [2024-06-28 01:03:44,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 604 transitions, 8784 flow [2024-06-28 01:03:48,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 604 transitions, 8598 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-28 01:03:48,119 INFO L231 Difference]: Finished difference. Result has 448 places, 567 transitions, 7513 flow [2024-06-28 01:03:48,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7298, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7513, PETRI_PLACES=448, PETRI_TRANSITIONS=567} [2024-06-28 01:03:48,120 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 398 predicate places. [2024-06-28 01:03:48,120 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 567 transitions, 7513 flow [2024-06-28 01:03:48,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:48,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:48,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:48,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-28 01:03:48,121 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:48,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:48,121 INFO L85 PathProgramCache]: Analyzing trace with hash 372130166, now seen corresponding path program 3 times [2024-06-28 01:03:48,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:48,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495110223] [2024-06-28 01:03:48,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:48,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:48,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:48,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495110223] [2024-06-28 01:03:48,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495110223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:48,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:48,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:03:48,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841818634] [2024-06-28 01:03:48,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:48,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:03:48,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:48,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:03:48,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:03:48,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:03:48,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 567 transitions, 7513 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:48,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:48,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:03:48,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:50,117 INFO L124 PetriNetUnfolderBase]: 4875/8140 cut-off events. [2024-06-28 01:03:50,117 INFO L125 PetriNetUnfolderBase]: For 475566/475699 co-relation queries the response was YES. [2024-06-28 01:03:50,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51028 conditions, 8140 events. 4875/8140 cut-off events. For 475566/475699 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 59428 event pairs, 836 based on Foata normal form. 134/8228 useless extension candidates. Maximal degree in co-relation 50849. Up to 7089 conditions per place. [2024-06-28 01:03:50,212 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 540 selfloop transitions, 48 changer transitions 0/603 dead transitions. [2024-06-28 01:03:50,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 603 transitions, 8807 flow [2024-06-28 01:03:50,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:03:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:03:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-28 01:03:50,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-06-28 01:03:50,213 INFO L175 Difference]: Start difference. First operand has 448 places, 567 transitions, 7513 flow. Second operand 8 states and 225 transitions. [2024-06-28 01:03:50,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 603 transitions, 8807 flow [2024-06-28 01:03:54,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 603 transitions, 8612 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 01:03:54,414 INFO L231 Difference]: Finished difference. Result has 450 places, 569 transitions, 7451 flow [2024-06-28 01:03:54,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7318, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7451, PETRI_PLACES=450, PETRI_TRANSITIONS=569} [2024-06-28 01:03:54,419 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 400 predicate places. [2024-06-28 01:03:54,419 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 569 transitions, 7451 flow [2024-06-28 01:03:54,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:54,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:03:54,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:03:54,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-28 01:03:54,420 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:03:54,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:03:54,420 INFO L85 PathProgramCache]: Analyzing trace with hash 372314864, now seen corresponding path program 1 times [2024-06-28 01:03:54,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:03:54,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376533690] [2024-06-28 01:03:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:03:54,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:03:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:03:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:03:54,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:03:54,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376533690] [2024-06-28 01:03:54,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376533690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:03:54,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:03:54,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:03:54,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832748605] [2024-06-28 01:03:54,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:03:54,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:03:54,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:03:54,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:03:54,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:03:54,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:03:54,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 569 transitions, 7451 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:03:54,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:03:54,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:03:54,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:03:56,463 INFO L124 PetriNetUnfolderBase]: 4893/8329 cut-off events. [2024-06-28 01:03:56,463 INFO L125 PetriNetUnfolderBase]: For 487023/487152 co-relation queries the response was YES. [2024-06-28 01:03:56,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51297 conditions, 8329 events. 4893/8329 cut-off events. For 487023/487152 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 61755 event pairs, 943 based on Foata normal form. 130/8405 useless extension candidates. Maximal degree in co-relation 51117. Up to 6989 conditions per place. [2024-06-28 01:03:56,563 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 499 selfloop transitions, 91 changer transitions 0/605 dead transitions. [2024-06-28 01:03:56,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 605 transitions, 8769 flow [2024-06-28 01:03:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:03:56,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:03:56,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-28 01:03:56,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-06-28 01:03:56,565 INFO L175 Difference]: Start difference. First operand has 450 places, 569 transitions, 7451 flow. Second operand 8 states and 228 transitions. [2024-06-28 01:03:56,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 605 transitions, 8769 flow [2024-06-28 01:04:00,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 605 transitions, 8672 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 01:04:00,135 INFO L231 Difference]: Finished difference. Result has 454 places, 571 transitions, 7593 flow [2024-06-28 01:04:00,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7354, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7593, PETRI_PLACES=454, PETRI_TRANSITIONS=571} [2024-06-28 01:04:00,135 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 404 predicate places. [2024-06-28 01:04:00,136 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 571 transitions, 7593 flow [2024-06-28 01:04:00,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:00,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:00,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:00,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-28 01:04:00,136 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:00,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:00,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1203170954, now seen corresponding path program 4 times [2024-06-28 01:04:00,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:00,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268734621] [2024-06-28 01:04:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:00,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:00,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:00,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268734621] [2024-06-28 01:04:00,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268734621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:00,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:00,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:04:00,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127595274] [2024-06-28 01:04:00,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:00,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:04:00,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:00,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:04:00,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:04:00,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:04:00,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 571 transitions, 7593 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:00,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:00,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:04:00,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:02,320 INFO L124 PetriNetUnfolderBase]: 4911/8401 cut-off events. [2024-06-28 01:04:02,321 INFO L125 PetriNetUnfolderBase]: For 496870/496999 co-relation queries the response was YES. [2024-06-28 01:04:02,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51849 conditions, 8401 events. 4911/8401 cut-off events. For 496870/496999 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 62500 event pairs, 1022 based on Foata normal form. 130/8481 useless extension candidates. Maximal degree in co-relation 51668. Up to 7127 conditions per place. [2024-06-28 01:04:02,422 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 538 selfloop transitions, 54 changer transitions 0/607 dead transitions. [2024-06-28 01:04:02,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 607 transitions, 8899 flow [2024-06-28 01:04:02,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 01:04:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 01:04:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-28 01:04:02,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-06-28 01:04:02,423 INFO L175 Difference]: Start difference. First operand has 454 places, 571 transitions, 7593 flow. Second operand 9 states and 246 transitions. [2024-06-28 01:04:02,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 607 transitions, 8899 flow [2024-06-28 01:04:06,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 607 transitions, 8676 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 01:04:06,615 INFO L231 Difference]: Finished difference. Result has 457 places, 573 transitions, 7519 flow [2024-06-28 01:04:06,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7370, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7519, PETRI_PLACES=457, PETRI_TRANSITIONS=573} [2024-06-28 01:04:06,621 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 407 predicate places. [2024-06-28 01:04:06,621 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 573 transitions, 7519 flow [2024-06-28 01:04:06,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:06,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:06,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:06,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-28 01:04:06,621 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:06,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:06,622 INFO L85 PathProgramCache]: Analyzing trace with hash -975085106, now seen corresponding path program 2 times [2024-06-28 01:04:06,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:06,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878263397] [2024-06-28 01:04:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:06,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:06,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:06,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878263397] [2024-06-28 01:04:06,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878263397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:06,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:06,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:04:06,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776137806] [2024-06-28 01:04:06,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:06,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:04:06,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:06,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:04:06,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:04:06,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:04:06,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 573 transitions, 7519 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:06,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:06,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:04:06,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:08,550 INFO L124 PetriNetUnfolderBase]: 4929/8388 cut-off events. [2024-06-28 01:04:08,550 INFO L125 PetriNetUnfolderBase]: For 504516/504645 co-relation queries the response was YES. [2024-06-28 01:04:08,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51845 conditions, 8388 events. 4929/8388 cut-off events. For 504516/504645 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 62162 event pairs, 950 based on Foata normal form. 130/8464 useless extension candidates. Maximal degree in co-relation 51663. Up to 7041 conditions per place. [2024-06-28 01:04:08,661 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 500 selfloop transitions, 91 changer transitions 0/606 dead transitions. [2024-06-28 01:04:08,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 606 transitions, 8835 flow [2024-06-28 01:04:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:04:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:04:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-28 01:04:08,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114130434782609 [2024-06-28 01:04:08,662 INFO L175 Difference]: Start difference. First operand has 457 places, 573 transitions, 7519 flow. Second operand 8 states and 225 transitions. [2024-06-28 01:04:08,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 606 transitions, 8835 flow [2024-06-28 01:04:13,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 606 transitions, 8706 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 01:04:13,209 INFO L231 Difference]: Finished difference. Result has 458 places, 575 transitions, 7633 flow [2024-06-28 01:04:13,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7390, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7633, PETRI_PLACES=458, PETRI_TRANSITIONS=575} [2024-06-28 01:04:13,209 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 408 predicate places. [2024-06-28 01:04:13,209 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 575 transitions, 7633 flow [2024-06-28 01:04:13,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:13,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:13,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:13,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-28 01:04:13,210 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:13,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:13,211 INFO L85 PathProgramCache]: Analyzing trace with hash -217275682, now seen corresponding path program 3 times [2024-06-28 01:04:13,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:13,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762671011] [2024-06-28 01:04:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:13,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:13,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:13,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762671011] [2024-06-28 01:04:13,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762671011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:13,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:13,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:04:13,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17658704] [2024-06-28 01:04:13,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:13,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:04:13,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:13,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:04:13,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:04:13,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:04:13,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 575 transitions, 7633 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:13,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:13,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:04:13,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:15,215 INFO L124 PetriNetUnfolderBase]: 4947/8331 cut-off events. [2024-06-28 01:04:15,216 INFO L125 PetriNetUnfolderBase]: For 512510/512643 co-relation queries the response was YES. [2024-06-28 01:04:15,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52300 conditions, 8331 events. 4947/8331 cut-off events. For 512510/512643 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61298 event pairs, 895 based on Foata normal form. 134/8416 useless extension candidates. Maximal degree in co-relation 52117. Up to 7067 conditions per place. [2024-06-28 01:04:15,320 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 504 selfloop transitions, 89 changer transitions 0/608 dead transitions. [2024-06-28 01:04:15,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 608 transitions, 8957 flow [2024-06-28 01:04:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:04:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:04:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-28 01:04:15,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-06-28 01:04:15,321 INFO L175 Difference]: Start difference. First operand has 458 places, 575 transitions, 7633 flow. Second operand 8 states and 226 transitions. [2024-06-28 01:04:15,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 608 transitions, 8957 flow [2024-06-28 01:04:19,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 608 transitions, 8730 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 01:04:19,646 INFO L231 Difference]: Finished difference. Result has 460 places, 577 transitions, 7649 flow [2024-06-28 01:04:19,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7406, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7649, PETRI_PLACES=460, PETRI_TRANSITIONS=577} [2024-06-28 01:04:19,646 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 410 predicate places. [2024-06-28 01:04:19,646 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 577 transitions, 7649 flow [2024-06-28 01:04:19,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:19,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:19,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:19,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-28 01:04:19,647 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:19,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:19,647 INFO L85 PathProgramCache]: Analyzing trace with hash 817325204, now seen corresponding path program 4 times [2024-06-28 01:04:19,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:19,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917594281] [2024-06-28 01:04:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:19,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:19,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:19,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917594281] [2024-06-28 01:04:19,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917594281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:19,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:19,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:04:19,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426828037] [2024-06-28 01:04:19,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:19,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:04:19,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:19,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:04:19,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:04:19,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:04:19,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 577 transitions, 7649 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:19,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:19,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:04:19,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:04:21,696 INFO L124 PetriNetUnfolderBase]: 4988/8468 cut-off events. [2024-06-28 01:04:21,696 INFO L125 PetriNetUnfolderBase]: For 539250/539379 co-relation queries the response was YES. [2024-06-28 01:04:21,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53270 conditions, 8468 events. 4988/8468 cut-off events. For 539250/539379 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 62793 event pairs, 945 based on Foata normal form. 130/8544 useless extension candidates. Maximal degree in co-relation 53086. Up to 7049 conditions per place. [2024-06-28 01:04:21,805 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 501 selfloop transitions, 99 changer transitions 0/615 dead transitions. [2024-06-28 01:04:21,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 615 transitions, 9289 flow [2024-06-28 01:04:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:04:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:04:21,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-28 01:04:21,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-06-28 01:04:21,807 INFO L175 Difference]: Start difference. First operand has 460 places, 577 transitions, 7649 flow. Second operand 8 states and 227 transitions. [2024-06-28 01:04:21,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 615 transitions, 9289 flow [2024-06-28 01:04:26,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 615 transitions, 9062 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 01:04:26,092 INFO L231 Difference]: Finished difference. Result has 463 places, 582 transitions, 7779 flow [2024-06-28 01:04:26,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7422, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7779, PETRI_PLACES=463, PETRI_TRANSITIONS=582} [2024-06-28 01:04:26,109 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 413 predicate places. [2024-06-28 01:04:26,109 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 582 transitions, 7779 flow [2024-06-28 01:04:26,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:26,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:04:26,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:04:26,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-28 01:04:26,109 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 01:04:26,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:04:26,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1758297598, now seen corresponding path program 13 times [2024-06-28 01:04:26,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:04:26,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602239608] [2024-06-28 01:04:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:04:26,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:04:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:04:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:04:26,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:04:26,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602239608] [2024-06-28 01:04:26,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602239608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:04:26,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:04:26,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 01:04:26,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172650302] [2024-06-28 01:04:26,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:04:26,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:04:26,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:04:26,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:04:26,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:04:26,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-06-28 01:04:26,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 582 transitions, 7779 flow. Second operand has 8 states, 8 states have (on average 19.875) internal successors, (159), 8 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:04:26,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:04:26,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-06-28 01:04:26,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand