./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_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/safe003_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/safe003_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe003_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 00:52:54,193 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:52:54,267 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:52:54,271 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:52:54,272 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:52:54,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:52:54,306 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:52:54,307 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:52:54,308 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:52:54,311 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:52:54,312 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:52:54,312 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:52:54,313 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:52:54,314 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:52:54,314 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:52:54,315 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:52:54,315 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:52:54,315 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:52:54,315 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:52:54,316 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:52:54,316 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:52:54,316 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:52:54,317 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:52:54,317 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:52:54,317 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:52:54,317 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:52:54,318 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:52:54,318 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:52:54,318 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:52:54,319 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:52:54,320 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:52:54,320 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:52:54,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:52:54,320 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:52:54,320 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:52:54,321 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:52:54,321 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:52:54,321 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:52:54,321 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:52:54,321 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:52:54,322 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:52:54,322 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:52:54,322 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:52:54,322 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 00:52:54,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:52:54,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:52:54,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:52:54,645 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:52:54,645 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:52:54,647 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe003_tso.yml/witness.yml [2024-06-28 00:52:54,787 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:52:54,787 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:52:54,788 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_tso.i [2024-06-28 00:52:55,912 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:52:56,202 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:52:56,203 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_tso.i [2024-06-28 00:52:56,217 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a843167fb/8656adffcad74e98ba0bd2ffa72a6d28/FLAG5d9853515 [2024-06-28 00:52:56,229 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a843167fb/8656adffcad74e98ba0bd2ffa72a6d28 [2024-06-28 00:52:56,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:52:56,230 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:52:56,231 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:52:56,232 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:52:56,236 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:52:56,237 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:52:54" (1/2) ... [2024-06-28 00:52:56,238 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3530de4b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:56, skipping insertion in model container [2024-06-28 00:52:56,238 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:52:54" (1/2) ... [2024-06-28 00:52:56,239 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@508c73fd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:52:56, skipping insertion in model container [2024-06-28 00:52:56,239 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:52:56" (2/2) ... [2024-06-28 00:52:56,240 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3530de4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56, skipping insertion in model container [2024-06-28 00:52:56,240 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:52:56" (2/2) ... [2024-06-28 00:52:56,240 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:52:56,282 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:52:56,283 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 00:52:56,283 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 00:52:56,284 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 00:52:56,284 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:52:56,284 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-28 00:52:56,326 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:52:56,473 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/safe003_tso.i[945,958] [2024-06-28 00:52:56,639 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:52:56,655 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 00:52:56,688 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/safe003_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:52:56,742 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:52:56,792 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:52:56,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56 WrapperNode [2024-06-28 00:52:56,793 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:52:56,795 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:52:56,795 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:52:56,795 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:52:56,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56" (1/1) ... [2024-06-28 00:52:56,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56" (1/1) ... [2024-06-28 00:52:56,873 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-06-28 00:52:56,873 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:52:56,874 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:52:56,874 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:52:56,874 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:52:56,886 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56" (1/1) ... [2024-06-28 00:52:56,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56" (1/1) ... [2024-06-28 00:52:56,891 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56" (1/1) ... [2024-06-28 00:52:56,918 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 00:52:56,919 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56" (1/1) ... [2024-06-28 00:52:56,920 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56" (1/1) ... [2024-06-28 00:52:56,934 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56" (1/1) ... [2024-06-28 00:52:56,936 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56" (1/1) ... [2024-06-28 00:52:56,941 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56" (1/1) ... [2024-06-28 00:52:56,942 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56" (1/1) ... [2024-06-28 00:52:56,945 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:52:56,950 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:52:56,950 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:52:56,950 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:52:56,951 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56" (1/1) ... [2024-06-28 00:52:56,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:52:56,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:52:56,981 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 00:52:56,983 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 00:52:57,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:52:57,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:52:57,009 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:52:57,009 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:52:57,010 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:52:57,010 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:52:57,010 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:52:57,010 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:52:57,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:52:57,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:52:57,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:52:57,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:52:57,012 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 00:52:57,120 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:52:57,122 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:52:57,353 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:52:57,353 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:52:57,449 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:52:57,449 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:52:57,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:52:57 BoogieIcfgContainer [2024-06-28 00:52:57,451 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:52:57,454 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:52:57,454 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:52:57,457 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:52:57,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:52:54" (1/4) ... [2024-06-28 00:52:57,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eed29b9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:52:57, skipping insertion in model container [2024-06-28 00:52:57,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:52:56" (2/4) ... [2024-06-28 00:52:57,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eed29b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:52:57, skipping insertion in model container [2024-06-28 00:52:57,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:52:56" (3/4) ... [2024-06-28 00:52:57,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eed29b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:52:57, skipping insertion in model container [2024-06-28 00:52:57,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:52:57" (4/4) ... [2024-06-28 00:52:57,460 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_tso.i [2024-06-28 00:52:57,474 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:52:57,474 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 00:52:57,474 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:52:57,523 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:52:57,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 45 transitions, 102 flow [2024-06-28 00:52:57,596 INFO L124 PetriNetUnfolderBase]: 1/42 cut-off events. [2024-06-28 00:52:57,597 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:52:57,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 42 events. 1/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-06-28 00:52:57,601 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 45 transitions, 102 flow [2024-06-28 00:52:57,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 39 transitions, 87 flow [2024-06-28 00:52:57,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:52:57,628 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;@675e3045, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:52:57,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 00:52:57,634 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:52:57,634 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:52:57,634 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:52:57,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:57,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:52:57,636 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 00:52:57,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:57,641 INFO L85 PathProgramCache]: Analyzing trace with hash 210327718, now seen corresponding path program 1 times [2024-06-28 00:52:57,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:57,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257759637] [2024-06-28 00:52:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:57,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:58,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:58,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257759637] [2024-06-28 00:52:58,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257759637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:58,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:58,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:52:58,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605451639] [2024-06-28 00:52:58,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:58,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:52:58,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:58,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:52:58,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:52:58,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 45 [2024-06-28 00:52:58,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:58,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:58,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 45 [2024-06-28 00:52:58,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:58,475 INFO L124 PetriNetUnfolderBase]: 740/1302 cut-off events. [2024-06-28 00:52:58,476 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-28 00:52:58,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2497 conditions, 1302 events. 740/1302 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7394 event pairs, 524 based on Foata normal form. 1/1242 useless extension candidates. Maximal degree in co-relation 2485. Up to 1128 conditions per place. [2024-06-28 00:52:58,494 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 31 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-06-28 00:52:58,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 187 flow [2024-06-28 00:52:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:52:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:52:58,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-28 00:52:58,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.725925925925926 [2024-06-28 00:52:58,508 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 87 flow. Second operand 3 states and 98 transitions. [2024-06-28 00:52:58,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 187 flow [2024-06-28 00:52:58,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:52:58,551 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 114 flow [2024-06-28 00:52:58,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-28 00:52:58,557 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-06-28 00:52:58,557 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 114 flow [2024-06-28 00:52:58,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:58,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:58,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:58,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:52:58,559 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 00:52:58,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:58,560 INFO L85 PathProgramCache]: Analyzing trace with hash 262436515, now seen corresponding path program 1 times [2024-06-28 00:52:58,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:58,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428461996] [2024-06-28 00:52:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:58,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:58,742 INFO 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 00:52:58,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:58,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428461996] [2024-06-28 00:52:58,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428461996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:58,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:58,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:52:58,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375299619] [2024-06-28 00:52:58,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:58,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:52:58,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:52:58,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:52:58,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:52:58,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:58,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:58,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:52:58,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:59,055 INFO L124 PetriNetUnfolderBase]: 1218/2132 cut-off events. [2024-06-28 00:52:59,055 INFO L125 PetriNetUnfolderBase]: For 374/378 co-relation queries the response was YES. [2024-06-28 00:52:59,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4518 conditions, 2132 events. 1218/2132 cut-off events. For 374/378 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12539 event pairs, 746 based on Foata normal form. 7/2110 useless extension candidates. Maximal degree in co-relation 4506. Up to 1746 conditions per place. [2024-06-28 00:52:59,071 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 48 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-06-28 00:52:59,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 312 flow [2024-06-28 00:52:59,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:52:59,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:52:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-28 00:52:59,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-06-28 00:52:59,078 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 114 flow. Second operand 4 states and 129 transitions. [2024-06-28 00:52:59,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 312 flow [2024-06-28 00:52:59,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 72 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:52:59,082 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 185 flow [2024-06-28 00:52:59,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-06-28 00:52:59,083 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-06-28 00:52:59,083 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 185 flow [2024-06-28 00:52:59,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:59,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:59,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:59,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:52:59,087 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:52:59,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:59,091 INFO L85 PathProgramCache]: Analyzing trace with hash -454402221, now seen corresponding path program 1 times [2024-06-28 00:52:59,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:59,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891688169] [2024-06-28 00:52:59,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:59,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:59,296 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 00:52:59,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:59,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891688169] [2024-06-28 00:52:59,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891688169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:59,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:59,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:52:59,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584775991] [2024-06-28 00:52:59,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:59,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:52:59,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:59,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:52:59,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:52:59,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:59,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 185 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:59,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:59,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:59,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:52:59,576 INFO L124 PetriNetUnfolderBase]: 1532/2446 cut-off events. [2024-06-28 00:52:59,577 INFO L125 PetriNetUnfolderBase]: For 1386/1386 co-relation queries the response was YES. [2024-06-28 00:52:59,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6288 conditions, 2446 events. 1532/2446 cut-off events. For 1386/1386 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13643 event pairs, 528 based on Foata normal form. 3/2445 useless extension candidates. Maximal degree in co-relation 6273. Up to 2222 conditions per place. [2024-06-28 00:52:59,595 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 64 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-06-28 00:52:59,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 434 flow [2024-06-28 00:52:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:52:59,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:52:59,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-28 00:52:59,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:52:59,604 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 185 flow. Second operand 5 states and 150 transitions. [2024-06-28 00:52:59,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 434 flow [2024-06-28 00:52:59,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 87 transitions, 432 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-28 00:52:59,613 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 270 flow [2024-06-28 00:52:59,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-06-28 00:52:59,614 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2024-06-28 00:52:59,614 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 270 flow [2024-06-28 00:52:59,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:59,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:52:59,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:52:59,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:52:59,616 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 00:52:59,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:52:59,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1166911888, now seen corresponding path program 1 times [2024-06-28 00:52:59,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:52:59,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034952858] [2024-06-28 00:52:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:52:59,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:52:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:52:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:52:59,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:52:59,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034952858] [2024-06-28 00:52:59,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034952858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:52:59,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:52:59,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:52:59,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659713368] [2024-06-28 00:52:59,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:52:59,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:52:59,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:52:59,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:52:59,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:52:59,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:52:59,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 270 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:52:59,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:52:59,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:52:59,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:00,169 INFO L124 PetriNetUnfolderBase]: 1523/2543 cut-off events. [2024-06-28 00:53:00,169 INFO L125 PetriNetUnfolderBase]: For 2184/2184 co-relation queries the response was YES. [2024-06-28 00:53:00,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6994 conditions, 2543 events. 1523/2543 cut-off events. For 2184/2184 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14760 event pairs, 565 based on Foata normal form. 6/2523 useless extension candidates. Maximal degree in co-relation 6974. Up to 2169 conditions per place. [2024-06-28 00:53:00,191 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 70 selfloop transitions, 12 changer transitions 0/95 dead transitions. [2024-06-28 00:53:00,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 518 flow [2024-06-28 00:53:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:00,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-28 00:53:00,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-28 00:53:00,194 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 270 flow. Second operand 6 states and 175 transitions. [2024-06-28 00:53:00,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 518 flow [2024-06-28 00:53:00,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 95 transitions, 516 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-28 00:53:00,201 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 305 flow [2024-06-28 00:53:00,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-06-28 00:53:00,203 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2024-06-28 00:53:00,203 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 305 flow [2024-06-28 00:53:00,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:00,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:00,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:00,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:53:00,204 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 00:53:00,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:00,205 INFO L85 PathProgramCache]: Analyzing trace with hash -576324553, now seen corresponding path program 1 times [2024-06-28 00:53:00,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:00,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385168639] [2024-06-28 00:53:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:00,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:00,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:00,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385168639] [2024-06-28 00:53:00,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385168639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:00,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:00,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:53:00,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186170040] [2024-06-28 00:53:00,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:00,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:53:00,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:53:00,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:53:00,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:00,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:00,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:00,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:00,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:00,671 INFO L124 PetriNetUnfolderBase]: 1510/2419 cut-off events. [2024-06-28 00:53:00,672 INFO L125 PetriNetUnfolderBase]: For 3078/3090 co-relation queries the response was YES. [2024-06-28 00:53:00,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7214 conditions, 2419 events. 1510/2419 cut-off events. For 3078/3090 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13589 event pairs, 492 based on Foata normal form. 12/2423 useless extension candidates. Maximal degree in co-relation 7191. Up to 2135 conditions per place. [2024-06-28 00:53:00,693 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 51 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-06-28 00:53:00,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 78 transitions, 482 flow [2024-06-28 00:53:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:53:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:53:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-28 00:53:00,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:53:00,695 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 305 flow. Second operand 4 states and 120 transitions. [2024-06-28 00:53:00,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 78 transitions, 482 flow [2024-06-28 00:53:00,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 455 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:00,707 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 340 flow [2024-06-28 00:53:00,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=340, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-28 00:53:00,711 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 17 predicate places. [2024-06-28 00:53:00,711 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 340 flow [2024-06-28 00:53:00,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:00,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:00,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:00,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:53:00,712 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 00:53:00,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:00,713 INFO L85 PathProgramCache]: Analyzing trace with hash 569170844, now seen corresponding path program 1 times [2024-06-28 00:53:00,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:00,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315397300] [2024-06-28 00:53:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:00,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:00,889 INFO 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 00:53:00,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:00,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315397300] [2024-06-28 00:53:00,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315397300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:00,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:00,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:00,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239608668] [2024-06-28 00:53:00,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:00,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:00,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:00,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:00,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:00,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:00,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:00,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:00,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:01,248 INFO L124 PetriNetUnfolderBase]: 1549/2488 cut-off events. [2024-06-28 00:53:01,248 INFO L125 PetriNetUnfolderBase]: For 3626/3629 co-relation queries the response was YES. [2024-06-28 00:53:01,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7653 conditions, 2488 events. 1549/2488 cut-off events. For 3626/3629 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13942 event pairs, 443 based on Foata normal form. 2/2476 useless extension candidates. Maximal degree in co-relation 7628. Up to 2097 conditions per place. [2024-06-28 00:53:01,272 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 70 selfloop transitions, 27 changer transitions 0/110 dead transitions. [2024-06-28 00:53:01,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 110 transitions, 718 flow [2024-06-28 00:53:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-28 00:53:01,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-06-28 00:53:01,274 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 340 flow. Second operand 6 states and 186 transitions. [2024-06-28 00:53:01,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 110 transitions, 718 flow [2024-06-28 00:53:01,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 110 transitions, 703 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 00:53:01,281 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 451 flow [2024-06-28 00:53:01,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=451, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-28 00:53:01,284 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 22 predicate places. [2024-06-28 00:53:01,285 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 451 flow [2024-06-28 00:53:01,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:01,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:01,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:01,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:53:01,286 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 00:53:01,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:01,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1319713450, now seen corresponding path program 2 times [2024-06-28 00:53:01,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:01,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569225698] [2024-06-28 00:53:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:01,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:01,420 INFO 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 00:53:01,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:01,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569225698] [2024-06-28 00:53:01,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569225698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:01,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:01,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:01,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506567951] [2024-06-28 00:53:01,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:01,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:01,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:01,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:01,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:01,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:01,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 451 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:01,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:01,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:01,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:01,775 INFO L124 PetriNetUnfolderBase]: 1583/2570 cut-off events. [2024-06-28 00:53:01,775 INFO L125 PetriNetUnfolderBase]: For 5626/5629 co-relation queries the response was YES. [2024-06-28 00:53:01,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8609 conditions, 2570 events. 1583/2570 cut-off events. For 5626/5629 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14719 event pairs, 474 based on Foata normal form. 2/2558 useless extension candidates. Maximal degree in co-relation 8582. Up to 2212 conditions per place. [2024-06-28 00:53:01,795 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 74 selfloop transitions, 22 changer transitions 0/109 dead transitions. [2024-06-28 00:53:01,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 773 flow [2024-06-28 00:53:01,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:01,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 00:53:01,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-28 00:53:01,797 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 451 flow. Second operand 6 states and 176 transitions. [2024-06-28 00:53:01,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 773 flow [2024-06-28 00:53:01,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 743 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-28 00:53:01,809 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 537 flow [2024-06-28 00:53:01,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=537, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-28 00:53:01,810 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 27 predicate places. [2024-06-28 00:53:01,810 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 537 flow [2024-06-28 00:53:01,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:01,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:01,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:01,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:53:01,811 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 00:53:01,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:01,812 INFO L85 PathProgramCache]: Analyzing trace with hash -715168292, now seen corresponding path program 3 times [2024-06-28 00:53:01,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:01,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118046660] [2024-06-28 00:53:01,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:01,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:01,938 INFO 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 00:53:01,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:01,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118046660] [2024-06-28 00:53:01,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118046660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:01,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:01,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:01,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101007912] [2024-06-28 00:53:01,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:01,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:01,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:01,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:01,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:01,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:01,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 537 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:01,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:01,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:01,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:02,319 INFO L124 PetriNetUnfolderBase]: 1595/2567 cut-off events. [2024-06-28 00:53:02,319 INFO L125 PetriNetUnfolderBase]: For 6669/6672 co-relation queries the response was YES. [2024-06-28 00:53:02,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8899 conditions, 2567 events. 1595/2567 cut-off events. For 6669/6672 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14501 event pairs, 440 based on Foata normal form. 4/2561 useless extension candidates. Maximal degree in co-relation 8869. Up to 2155 conditions per place. [2024-06-28 00:53:02,341 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 73 selfloop transitions, 31 changer transitions 0/117 dead transitions. [2024-06-28 00:53:02,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 117 transitions, 879 flow [2024-06-28 00:53:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:02,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-28 00:53:02,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-28 00:53:02,343 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 537 flow. Second operand 6 states and 183 transitions. [2024-06-28 00:53:02,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 117 transitions, 879 flow [2024-06-28 00:53:02,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 117 transitions, 821 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:02,356 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 592 flow [2024-06-28 00:53:02,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=592, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2024-06-28 00:53:02,357 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2024-06-28 00:53:02,357 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 592 flow [2024-06-28 00:53:02,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:02,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:02,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:02,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:53:02,358 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 00:53:02,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:02,359 INFO L85 PathProgramCache]: Analyzing trace with hash -714922028, now seen corresponding path program 1 times [2024-06-28 00:53:02,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:02,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817728831] [2024-06-28 00:53:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:02,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:02,491 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 00:53:02,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:02,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817728831] [2024-06-28 00:53:02,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817728831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:02,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:02,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:02,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041540345] [2024-06-28 00:53:02,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:02,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:02,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:02,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:02,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:02,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:02,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 592 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:02,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:02,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:02,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:02,825 INFO L124 PetriNetUnfolderBase]: 1614/2613 cut-off events. [2024-06-28 00:53:02,825 INFO L125 PetriNetUnfolderBase]: For 8333/8348 co-relation queries the response was YES. [2024-06-28 00:53:02,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9252 conditions, 2613 events. 1614/2613 cut-off events. For 8333/8348 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14927 event pairs, 409 based on Foata normal form. 18/2617 useless extension candidates. Maximal degree in co-relation 9220. Up to 2219 conditions per place. [2024-06-28 00:53:02,850 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 74 selfloop transitions, 20 changer transitions 0/107 dead transitions. [2024-06-28 00:53:02,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 107 transitions, 852 flow [2024-06-28 00:53:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:53:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:53:02,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-28 00:53:02,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-28 00:53:02,856 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 592 flow. Second operand 5 states and 147 transitions. [2024-06-28 00:53:02,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 107 transitions, 852 flow [2024-06-28 00:53:02,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 107 transitions, 788 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:02,869 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 602 flow [2024-06-28 00:53:02,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=602, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2024-06-28 00:53:02,870 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2024-06-28 00:53:02,870 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 602 flow [2024-06-28 00:53:02,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:02,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:02,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:02,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:53:02,871 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 00:53:02,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:02,872 INFO L85 PathProgramCache]: Analyzing trace with hash 464428382, now seen corresponding path program 1 times [2024-06-28 00:53:02,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:02,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580802102] [2024-06-28 00:53:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:02,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:02,991 INFO 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 00:53:02,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:02,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580802102] [2024-06-28 00:53:02,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580802102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:02,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:02,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:02,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97198264] [2024-06-28 00:53:02,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:02,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:02,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:02,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:02,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:03,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:03,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 602 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:03,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:03,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:03,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:03,359 INFO L124 PetriNetUnfolderBase]: 1609/2706 cut-off events. [2024-06-28 00:53:03,359 INFO L125 PetriNetUnfolderBase]: For 8583/8598 co-relation queries the response was YES. [2024-06-28 00:53:03,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9551 conditions, 2706 events. 1609/2706 cut-off events. For 8583/8598 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16081 event pairs, 666 based on Foata normal form. 10/2681 useless extension candidates. Maximal degree in co-relation 9518. Up to 2151 conditions per place. [2024-06-28 00:53:03,384 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 74 selfloop transitions, 30 changer transitions 0/117 dead transitions. [2024-06-28 00:53:03,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 918 flow [2024-06-28 00:53:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-28 00:53:03,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-28 00:53:03,386 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 602 flow. Second operand 6 states and 178 transitions. [2024-06-28 00:53:03,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 918 flow [2024-06-28 00:53:03,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 117 transitions, 868 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:03,399 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 620 flow [2024-06-28 00:53:03,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=620, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2024-06-28 00:53:03,400 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 35 predicate places. [2024-06-28 00:53:03,401 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 620 flow [2024-06-28 00:53:03,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:03,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:03,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:03,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:53:03,402 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 00:53:03,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:03,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1269823262, now seen corresponding path program 2 times [2024-06-28 00:53:03,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:03,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087116049] [2024-06-28 00:53:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:03,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:03,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:03,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087116049] [2024-06-28 00:53:03,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087116049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:03,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:03,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:03,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29667690] [2024-06-28 00:53:03,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:03,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:03,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:03,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:03,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 620 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:03,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:03,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:03,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:03,937 INFO L124 PetriNetUnfolderBase]: 1626/2633 cut-off events. [2024-06-28 00:53:03,938 INFO L125 PetriNetUnfolderBase]: For 9476/9491 co-relation queries the response was YES. [2024-06-28 00:53:03,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9670 conditions, 2633 events. 1626/2633 cut-off events. For 9476/9491 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15135 event pairs, 458 based on Foata normal form. 10/2628 useless extension candidates. Maximal degree in co-relation 9636. Up to 2195 conditions per place. [2024-06-28 00:53:03,957 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 72 selfloop transitions, 29 changer transitions 0/114 dead transitions. [2024-06-28 00:53:03,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 114 transitions, 950 flow [2024-06-28 00:53:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:53:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:53:03,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-28 00:53:03,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6755555555555556 [2024-06-28 00:53:03,960 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 620 flow. Second operand 5 states and 152 transitions. [2024-06-28 00:53:03,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 114 transitions, 950 flow [2024-06-28 00:53:03,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 114 transitions, 841 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 00:53:03,975 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 608 flow [2024-06-28 00:53:03,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=608, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-06-28 00:53:03,976 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 34 predicate places. [2024-06-28 00:53:03,976 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 608 flow [2024-06-28 00:53:03,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:03,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:03,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:03,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:53:03,977 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 00:53:03,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:03,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1269828842, now seen corresponding path program 3 times [2024-06-28 00:53:03,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:03,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116223619] [2024-06-28 00:53:03,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:03,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:04,115 INFO 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 00:53:04,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:04,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116223619] [2024-06-28 00:53:04,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116223619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:04,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:04,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:04,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035570682] [2024-06-28 00:53:04,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:04,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:04,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:04,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:04,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:04,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:04,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 608 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:04,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:04,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:04,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:04,497 INFO L124 PetriNetUnfolderBase]: 1621/2629 cut-off events. [2024-06-28 00:53:04,497 INFO L125 PetriNetUnfolderBase]: For 10102/10117 co-relation queries the response was YES. [2024-06-28 00:53:04,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9629 conditions, 2629 events. 1621/2629 cut-off events. For 10102/10117 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15050 event pairs, 446 based on Foata normal form. 12/2635 useless extension candidates. Maximal degree in co-relation 9596. Up to 2190 conditions per place. [2024-06-28 00:53:04,521 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 78 selfloop transitions, 33 changer transitions 0/124 dead transitions. [2024-06-28 00:53:04,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 124 transitions, 916 flow [2024-06-28 00:53:04,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-28 00:53:04,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:53:04,523 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 608 flow. Second operand 7 states and 203 transitions. [2024-06-28 00:53:04,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 124 transitions, 916 flow [2024-06-28 00:53:04,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 124 transitions, 868 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 00:53:04,544 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 634 flow [2024-06-28 00:53:04,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=634, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2024-06-28 00:53:04,545 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 39 predicate places. [2024-06-28 00:53:04,545 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 634 flow [2024-06-28 00:53:04,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:04,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:04,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:04,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:53:04,546 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 00:53:04,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:04,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1509517467, now seen corresponding path program 1 times [2024-06-28 00:53:04,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:04,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117676921] [2024-06-28 00:53:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:04,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:04,706 INFO 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 00:53:04,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:04,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117676921] [2024-06-28 00:53:04,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117676921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:04,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:04,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:04,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834144829] [2024-06-28 00:53:04,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:04,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:04,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:04,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:04,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:04,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:04,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:04,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:04,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:04,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:05,120 INFO L124 PetriNetUnfolderBase]: 1770/2867 cut-off events. [2024-06-28 00:53:05,120 INFO L125 PetriNetUnfolderBase]: For 13186/13189 co-relation queries the response was YES. [2024-06-28 00:53:05,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10841 conditions, 2867 events. 1770/2867 cut-off events. For 13186/13189 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16758 event pairs, 330 based on Foata normal form. 4/2851 useless extension candidates. Maximal degree in co-relation 10807. Up to 2114 conditions per place. [2024-06-28 00:53:05,147 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 81 selfloop transitions, 44 changer transitions 0/138 dead transitions. [2024-06-28 00:53:05,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 1084 flow [2024-06-28 00:53:05,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-28 00:53:05,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6793650793650794 [2024-06-28 00:53:05,149 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 634 flow. Second operand 7 states and 214 transitions. [2024-06-28 00:53:05,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 1084 flow [2024-06-28 00:53:05,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 138 transitions, 996 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 00:53:05,173 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 685 flow [2024-06-28 00:53:05,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=685, PETRI_PLACES=88, PETRI_TRANSITIONS=92} [2024-06-28 00:53:05,174 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 39 predicate places. [2024-06-28 00:53:05,174 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 685 flow [2024-06-28 00:53:05,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:05,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:05,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:05,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:53:05,175 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 00:53:05,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:05,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1344524365, now seen corresponding path program 2 times [2024-06-28 00:53:05,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:05,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341562316] [2024-06-28 00:53:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:05,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:05,327 INFO 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 00:53:05,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:05,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341562316] [2024-06-28 00:53:05,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341562316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:05,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:05,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:05,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76434723] [2024-06-28 00:53:05,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:05,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:05,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:05,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:05,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:05,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:05,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 685 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:05,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:05,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:05,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:05,731 INFO L124 PetriNetUnfolderBase]: 1797/2882 cut-off events. [2024-06-28 00:53:05,731 INFO L125 PetriNetUnfolderBase]: For 15308/15311 co-relation queries the response was YES. [2024-06-28 00:53:05,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11396 conditions, 2882 events. 1797/2882 cut-off events. For 15308/15311 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16539 event pairs, 433 based on Foata normal form. 4/2868 useless extension candidates. Maximal degree in co-relation 11361. Up to 2414 conditions per place. [2024-06-28 00:53:05,758 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 80 selfloop transitions, 41 changer transitions 0/134 dead transitions. [2024-06-28 00:53:05,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 134 transitions, 1047 flow [2024-06-28 00:53:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 00:53:05,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-28 00:53:05,760 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 685 flow. Second operand 7 states and 208 transitions. [2024-06-28 00:53:05,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 134 transitions, 1047 flow [2024-06-28 00:53:05,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 134 transitions, 982 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:05,791 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 737 flow [2024-06-28 00:53:05,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=737, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2024-06-28 00:53:05,792 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 43 predicate places. [2024-06-28 00:53:05,792 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 737 flow [2024-06-28 00:53:05,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:05,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:05,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:05,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:53:05,793 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 00:53:05,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:05,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1229233195, now seen corresponding path program 3 times [2024-06-28 00:53:05,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:05,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858104966] [2024-06-28 00:53:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:05,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:05,969 INFO 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 00:53:05,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:05,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858104966] [2024-06-28 00:53:05,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858104966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:05,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:05,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:05,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851026058] [2024-06-28 00:53:05,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:05,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:05,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:05,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:05,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:06,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:06,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 737 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:06,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:06,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:06,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:06,405 INFO L124 PetriNetUnfolderBase]: 1824/2995 cut-off events. [2024-06-28 00:53:06,405 INFO L125 PetriNetUnfolderBase]: For 18084/18087 co-relation queries the response was YES. [2024-06-28 00:53:06,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12027 conditions, 2995 events. 1824/2995 cut-off events. For 18084/18087 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17643 event pairs, 506 based on Foata normal form. 4/2987 useless extension candidates. Maximal degree in co-relation 11990. Up to 2559 conditions per place. [2024-06-28 00:53:06,430 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 96 selfloop transitions, 24 changer transitions 0/133 dead transitions. [2024-06-28 00:53:06,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 133 transitions, 1093 flow [2024-06-28 00:53:06,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-28 00:53:06,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6412698412698413 [2024-06-28 00:53:06,433 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 737 flow. Second operand 7 states and 202 transitions. [2024-06-28 00:53:06,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 133 transitions, 1093 flow [2024-06-28 00:53:06,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 133 transitions, 998 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:06,462 INFO L231 Difference]: Finished difference. Result has 94 places, 96 transitions, 729 flow [2024-06-28 00:53:06,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=729, PETRI_PLACES=94, PETRI_TRANSITIONS=96} [2024-06-28 00:53:06,464 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 45 predicate places. [2024-06-28 00:53:06,464 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 96 transitions, 729 flow [2024-06-28 00:53:06,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:06,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:06,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:06,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:53:06,465 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:06,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:06,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1865579505, now seen corresponding path program 1 times [2024-06-28 00:53:06,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:06,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637841317] [2024-06-28 00:53:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:06,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:06,618 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 00:53:06,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:06,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637841317] [2024-06-28 00:53:06,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637841317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:06,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:06,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:53:06,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983466905] [2024-06-28 00:53:06,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:06,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:53:06,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:06,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:53:06,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:53:06,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:53:06,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 96 transitions, 729 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:06,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:06,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:53:06,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:06,953 INFO L124 PetriNetUnfolderBase]: 1767/2876 cut-off events. [2024-06-28 00:53:06,954 INFO L125 PetriNetUnfolderBase]: For 19533/19533 co-relation queries the response was YES. [2024-06-28 00:53:06,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11755 conditions, 2876 events. 1767/2876 cut-off events. For 19533/19533 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16945 event pairs, 410 based on Foata normal form. 3/2849 useless extension candidates. Maximal degree in co-relation 11717. Up to 2421 conditions per place. [2024-06-28 00:53:06,981 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 87 selfloop transitions, 28 changer transitions 0/133 dead transitions. [2024-06-28 00:53:06,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 133 transitions, 1151 flow [2024-06-28 00:53:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:53:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:53:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-28 00:53:06,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-28 00:53:06,983 INFO L175 Difference]: Start difference. First operand has 94 places, 96 transitions, 729 flow. Second operand 5 states and 153 transitions. [2024-06-28 00:53:06,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 133 transitions, 1151 flow [2024-06-28 00:53:07,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 133 transitions, 1086 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:07,013 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 832 flow [2024-06-28 00:53:07,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=832, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2024-06-28 00:53:07,014 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 46 predicate places. [2024-06-28 00:53:07,014 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 832 flow [2024-06-28 00:53:07,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:07,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:07,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:07,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:53:07,015 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 00:53:07,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1046871013, now seen corresponding path program 4 times [2024-06-28 00:53:07,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:07,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531655442] [2024-06-28 00:53:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:07,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:07,160 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 00:53:07,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:07,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531655442] [2024-06-28 00:53:07,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531655442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:07,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:07,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:07,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186520122] [2024-06-28 00:53:07,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:07,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:07,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:07,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:07,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:07,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:07,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 832 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:07,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:07,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:07,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:07,667 INFO L124 PetriNetUnfolderBase]: 1835/3017 cut-off events. [2024-06-28 00:53:07,667 INFO L125 PetriNetUnfolderBase]: For 22021/22024 co-relation queries the response was YES. [2024-06-28 00:53:07,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12462 conditions, 3017 events. 1835/3017 cut-off events. For 22021/22024 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17707 event pairs, 337 based on Foata normal form. 20/3026 useless extension candidates. Maximal degree in co-relation 12422. Up to 2293 conditions per place. [2024-06-28 00:53:07,699 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 99 selfloop transitions, 40 changer transitions 0/152 dead transitions. [2024-06-28 00:53:07,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 152 transitions, 1222 flow [2024-06-28 00:53:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-28 00:53:07,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-28 00:53:07,702 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 832 flow. Second operand 7 states and 211 transitions. [2024-06-28 00:53:07,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 152 transitions, 1222 flow [2024-06-28 00:53:07,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 152 transitions, 1196 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-28 00:53:07,739 INFO L231 Difference]: Finished difference. Result has 102 places, 109 transitions, 900 flow [2024-06-28 00:53:07,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=900, PETRI_PLACES=102, PETRI_TRANSITIONS=109} [2024-06-28 00:53:07,740 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 53 predicate places. [2024-06-28 00:53:07,741 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 109 transitions, 900 flow [2024-06-28 00:53:07,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:07,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:07,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:07,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:53:07,742 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 00:53:07,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:07,743 INFO L85 PathProgramCache]: Analyzing trace with hash 146164531, now seen corresponding path program 1 times [2024-06-28 00:53:07,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:07,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073433539] [2024-06-28 00:53:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:07,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:07,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:07,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073433539] [2024-06-28 00:53:07,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073433539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:07,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:07,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:07,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41836552] [2024-06-28 00:53:07,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:07,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:07,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:07,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:07,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:07,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:07,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 109 transitions, 900 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:07,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:07,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:07,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:08,320 INFO L124 PetriNetUnfolderBase]: 1862/3049 cut-off events. [2024-06-28 00:53:08,321 INFO L125 PetriNetUnfolderBase]: For 22720/22723 co-relation queries the response was YES. [2024-06-28 00:53:08,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12986 conditions, 3049 events. 1862/3049 cut-off events. For 22720/22723 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17865 event pairs, 498 based on Foata normal form. 4/3040 useless extension candidates. Maximal degree in co-relation 12943. Up to 2621 conditions per place. [2024-06-28 00:53:08,345 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 103 selfloop transitions, 20 changer transitions 0/136 dead transitions. [2024-06-28 00:53:08,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 136 transitions, 1228 flow [2024-06-28 00:53:08,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:53:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:53:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-28 00:53:08,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:53:08,347 INFO L175 Difference]: Start difference. First operand has 102 places, 109 transitions, 900 flow. Second operand 5 states and 150 transitions. [2024-06-28 00:53:08,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 136 transitions, 1228 flow [2024-06-28 00:53:08,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 136 transitions, 1137 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:53:08,382 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 882 flow [2024-06-28 00:53:08,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=882, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-06-28 00:53:08,382 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 52 predicate places. [2024-06-28 00:53:08,382 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 882 flow [2024-06-28 00:53:08,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:08,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:08,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:08,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:53:08,383 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 00:53:08,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:08,384 INFO L85 PathProgramCache]: Analyzing trace with hash 154735411, now seen corresponding path program 2 times [2024-06-28 00:53:08,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:08,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336251895] [2024-06-28 00:53:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:08,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:08,501 INFO 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 00:53:08,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:08,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336251895] [2024-06-28 00:53:08,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336251895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:08,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:08,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:08,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441280997] [2024-06-28 00:53:08,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:08,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:08,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:08,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:08,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:08,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:08,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 882 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:08,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:08,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:08,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:08,865 INFO L124 PetriNetUnfolderBase]: 1854/2978 cut-off events. [2024-06-28 00:53:08,866 INFO L125 PetriNetUnfolderBase]: For 21903/21918 co-relation queries the response was YES. [2024-06-28 00:53:08,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12739 conditions, 2978 events. 1854/2978 cut-off events. For 21903/21918 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17255 event pairs, 381 based on Foata normal form. 12/2971 useless extension candidates. Maximal degree in co-relation 12695. Up to 2524 conditions per place. [2024-06-28 00:53:08,895 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 103 selfloop transitions, 20 changer transitions 0/136 dead transitions. [2024-06-28 00:53:08,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1208 flow [2024-06-28 00:53:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:53:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:53:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-28 00:53:08,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488888888888888 [2024-06-28 00:53:08,898 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 882 flow. Second operand 5 states and 146 transitions. [2024-06-28 00:53:08,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1208 flow [2024-06-28 00:53:08,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 136 transitions, 1153 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:08,926 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 904 flow [2024-06-28 00:53:08,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=904, PETRI_PLACES=103, PETRI_TRANSITIONS=113} [2024-06-28 00:53:08,928 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 54 predicate places. [2024-06-28 00:53:08,928 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 904 flow [2024-06-28 00:53:08,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:08,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:08,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:08,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:53:08,929 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:08,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:08,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1865193555, now seen corresponding path program 2 times [2024-06-28 00:53:08,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:08,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658982584] [2024-06-28 00:53:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:08,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:09,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:09,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658982584] [2024-06-28 00:53:09,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658982584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:09,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:09,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:53:09,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067963089] [2024-06-28 00:53:09,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:09,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:53:09,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:09,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:53:09,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:53:09,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:53:09,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 113 transitions, 904 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:09,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:09,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:53:09,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:09,400 INFO L124 PetriNetUnfolderBase]: 1844/3018 cut-off events. [2024-06-28 00:53:09,401 INFO L125 PetriNetUnfolderBase]: For 24794/24800 co-relation queries the response was YES. [2024-06-28 00:53:09,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13111 conditions, 3018 events. 1844/3018 cut-off events. For 24794/24800 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17983 event pairs, 388 based on Foata normal form. 12/2998 useless extension candidates. Maximal degree in co-relation 13066. Up to 2514 conditions per place. [2024-06-28 00:53:09,435 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 99 selfloop transitions, 37 changer transitions 0/154 dead transitions. [2024-06-28 00:53:09,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 154 transitions, 1397 flow [2024-06-28 00:53:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:53:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:53:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-28 00:53:09,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6977777777777778 [2024-06-28 00:53:09,438 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 904 flow. Second operand 5 states and 157 transitions. [2024-06-28 00:53:09,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 154 transitions, 1397 flow [2024-06-28 00:53:09,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 154 transitions, 1338 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:09,482 INFO L231 Difference]: Finished difference. Result has 106 places, 128 transitions, 1109 flow [2024-06-28 00:53:09,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1109, PETRI_PLACES=106, PETRI_TRANSITIONS=128} [2024-06-28 00:53:09,482 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 57 predicate places. [2024-06-28 00:53:09,483 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 128 transitions, 1109 flow [2024-06-28 00:53:09,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:09,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:09,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:09,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:53:09,484 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 00:53:09,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:09,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1699267775, now seen corresponding path program 1 times [2024-06-28 00:53:09,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:09,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769285711] [2024-06-28 00:53:09,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:09,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:09,617 INFO 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 00:53:09,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:09,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769285711] [2024-06-28 00:53:09,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769285711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:09,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:09,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:09,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917522108] [2024-06-28 00:53:09,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:09,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:09,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:09,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:09,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:09,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:09,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 128 transitions, 1109 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:09,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:09,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:09,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:10,127 INFO L124 PetriNetUnfolderBase]: 2106/3384 cut-off events. [2024-06-28 00:53:10,128 INFO L125 PetriNetUnfolderBase]: For 33139/33154 co-relation queries the response was YES. [2024-06-28 00:53:10,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15738 conditions, 3384 events. 2106/3384 cut-off events. For 33139/33154 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 20086 event pairs, 289 based on Foata normal form. 20/3387 useless extension candidates. Maximal degree in co-relation 15691. Up to 2284 conditions per place. [2024-06-28 00:53:10,160 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 123 selfloop transitions, 40 changer transitions 0/176 dead transitions. [2024-06-28 00:53:10,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 176 transitions, 1665 flow [2024-06-28 00:53:10,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:10,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-28 00:53:10,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-28 00:53:10,164 INFO L175 Difference]: Start difference. First operand has 106 places, 128 transitions, 1109 flow. Second operand 7 states and 209 transitions. [2024-06-28 00:53:10,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 176 transitions, 1665 flow [2024-06-28 00:53:10,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 176 transitions, 1643 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-28 00:53:10,215 INFO L231 Difference]: Finished difference. Result has 112 places, 130 transitions, 1211 flow [2024-06-28 00:53:10,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1211, PETRI_PLACES=112, PETRI_TRANSITIONS=130} [2024-06-28 00:53:10,216 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 63 predicate places. [2024-06-28 00:53:10,216 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 130 transitions, 1211 flow [2024-06-28 00:53:10,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:10,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:10,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:10,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:53:10,218 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 00:53:10,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:10,219 INFO L85 PathProgramCache]: Analyzing trace with hash -360883747, now seen corresponding path program 2 times [2024-06-28 00:53:10,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:10,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58564991] [2024-06-28 00:53:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:10,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:10,344 INFO 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 00:53:10,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:10,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58564991] [2024-06-28 00:53:10,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58564991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:10,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:10,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:10,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487044676] [2024-06-28 00:53:10,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:10,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:10,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:10,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:10,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:10,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:10,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 130 transitions, 1211 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:10,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:10,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:10,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:10,859 INFO L124 PetriNetUnfolderBase]: 2200/3686 cut-off events. [2024-06-28 00:53:10,860 INFO L125 PetriNetUnfolderBase]: For 39047/39062 co-relation queries the response was YES. [2024-06-28 00:53:10,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17062 conditions, 3686 events. 2200/3686 cut-off events. For 39047/39062 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23226 event pairs, 760 based on Foata normal form. 24/3661 useless extension candidates. Maximal degree in co-relation 17013. Up to 2920 conditions per place. [2024-06-28 00:53:10,884 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 124 selfloop transitions, 34 changer transitions 0/171 dead transitions. [2024-06-28 00:53:10,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 171 transitions, 1653 flow [2024-06-28 00:53:10,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:10,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-28 00:53:10,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-28 00:53:10,885 INFO L175 Difference]: Start difference. First operand has 112 places, 130 transitions, 1211 flow. Second operand 7 states and 204 transitions. [2024-06-28 00:53:10,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 171 transitions, 1653 flow [2024-06-28 00:53:10,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 171 transitions, 1603 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:10,933 INFO L231 Difference]: Finished difference. Result has 116 places, 131 transitions, 1258 flow [2024-06-28 00:53:10,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1258, PETRI_PLACES=116, PETRI_TRANSITIONS=131} [2024-06-28 00:53:10,934 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 67 predicate places. [2024-06-28 00:53:10,934 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 131 transitions, 1258 flow [2024-06-28 00:53:10,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:10,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:10,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:10,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:53:10,934 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 00:53:10,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash -447723427, now seen corresponding path program 3 times [2024-06-28 00:53:10,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:10,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775402310] [2024-06-28 00:53:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:10,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:11,058 INFO 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 00:53:11,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:11,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775402310] [2024-06-28 00:53:11,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775402310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:11,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:11,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:11,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328472354] [2024-06-28 00:53:11,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:11,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:11,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:11,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:11,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:11,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:11,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 131 transitions, 1258 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:11,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:11,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:11,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:11,583 INFO L124 PetriNetUnfolderBase]: 2267/3795 cut-off events. [2024-06-28 00:53:11,583 INFO L125 PetriNetUnfolderBase]: For 42451/42466 co-relation queries the response was YES. [2024-06-28 00:53:11,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17849 conditions, 3795 events. 2267/3795 cut-off events. For 42451/42466 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23989 event pairs, 749 based on Foata normal form. 20/3766 useless extension candidates. Maximal degree in co-relation 17798. Up to 2904 conditions per place. [2024-06-28 00:53:11,611 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 126 selfloop transitions, 36 changer transitions 0/175 dead transitions. [2024-06-28 00:53:11,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 175 transitions, 1724 flow [2024-06-28 00:53:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-28 00:53:11,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-28 00:53:11,613 INFO L175 Difference]: Start difference. First operand has 116 places, 131 transitions, 1258 flow. Second operand 7 states and 207 transitions. [2024-06-28 00:53:11,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 175 transitions, 1724 flow [2024-06-28 00:53:11,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 175 transitions, 1649 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:11,668 INFO L231 Difference]: Finished difference. Result has 118 places, 132 transitions, 1285 flow [2024-06-28 00:53:11,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1285, PETRI_PLACES=118, PETRI_TRANSITIONS=132} [2024-06-28 00:53:11,669 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 69 predicate places. [2024-06-28 00:53:11,669 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 132 transitions, 1285 flow [2024-06-28 00:53:11,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:11,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:11,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:11,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:53:11,670 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:11,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:11,670 INFO L85 PathProgramCache]: Analyzing trace with hash 885244717, now seen corresponding path program 1 times [2024-06-28 00:53:11,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:11,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393769926] [2024-06-28 00:53:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:11,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:11,794 INFO 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 00:53:11,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:11,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393769926] [2024-06-28 00:53:11,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393769926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:11,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:11,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:11,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741999806] [2024-06-28 00:53:11,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:11,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:11,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:11,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:11,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:11,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:11,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 132 transitions, 1285 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:11,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:11,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:11,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:12,192 INFO L124 PetriNetUnfolderBase]: 2278/3781 cut-off events. [2024-06-28 00:53:12,192 INFO L125 PetriNetUnfolderBase]: For 41965/41965 co-relation queries the response was YES. [2024-06-28 00:53:12,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17955 conditions, 3781 events. 2278/3781 cut-off events. For 41965/41965 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23713 event pairs, 809 based on Foata normal form. 1/3751 useless extension candidates. Maximal degree in co-relation 17903. Up to 3319 conditions per place. [2024-06-28 00:53:12,218 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 142 selfloop transitions, 22 changer transitions 0/177 dead transitions. [2024-06-28 00:53:12,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 177 transitions, 1817 flow [2024-06-28 00:53:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-28 00:53:12,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:53:12,219 INFO L175 Difference]: Start difference. First operand has 118 places, 132 transitions, 1285 flow. Second operand 6 states and 174 transitions. [2024-06-28 00:53:12,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 177 transitions, 1817 flow [2024-06-28 00:53:12,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 177 transitions, 1733 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:12,273 INFO L231 Difference]: Finished difference. Result has 121 places, 146 transitions, 1372 flow [2024-06-28 00:53:12,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1372, PETRI_PLACES=121, PETRI_TRANSITIONS=146} [2024-06-28 00:53:12,273 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 72 predicate places. [2024-06-28 00:53:12,273 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 146 transitions, 1372 flow [2024-06-28 00:53:12,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:12,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:12,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:12,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:53:12,274 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 00:53:12,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:12,275 INFO L85 PathProgramCache]: Analyzing trace with hash 553988271, now seen corresponding path program 4 times [2024-06-28 00:53:12,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:12,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587339359] [2024-06-28 00:53:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:12,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:12,414 INFO 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 00:53:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587339359] [2024-06-28 00:53:12,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587339359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:12,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:12,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891016643] [2024-06-28 00:53:12,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:12,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:12,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:12,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:12,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 146 transitions, 1372 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:12,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:12,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:12,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:12,874 INFO L124 PetriNetUnfolderBase]: 2372/3847 cut-off events. [2024-06-28 00:53:12,874 INFO L125 PetriNetUnfolderBase]: For 49114/49129 co-relation queries the response was YES. [2024-06-28 00:53:12,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18893 conditions, 3847 events. 2372/3847 cut-off events. For 49114/49129 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 23733 event pairs, 505 based on Foata normal form. 26/3865 useless extension candidates. Maximal degree in co-relation 18838. Up to 3220 conditions per place. [2024-06-28 00:53:12,903 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 146 selfloop transitions, 34 changer transitions 0/193 dead transitions. [2024-06-28 00:53:12,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 193 transitions, 1878 flow [2024-06-28 00:53:12,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:53:12,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:53:12,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-28 00:53:12,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-28 00:53:12,905 INFO L175 Difference]: Start difference. First operand has 121 places, 146 transitions, 1372 flow. Second operand 8 states and 231 transitions. [2024-06-28 00:53:12,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 193 transitions, 1878 flow [2024-06-28 00:53:12,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 193 transitions, 1858 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-28 00:53:12,968 INFO L231 Difference]: Finished difference. Result has 129 places, 147 transitions, 1453 flow [2024-06-28 00:53:12,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1453, PETRI_PLACES=129, PETRI_TRANSITIONS=147} [2024-06-28 00:53:12,969 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 80 predicate places. [2024-06-28 00:53:12,969 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 147 transitions, 1453 flow [2024-06-28 00:53:12,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:12,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:12,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:12,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:53:12,970 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 00:53:12,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:12,970 INFO L85 PathProgramCache]: Analyzing trace with hash 529482653, now seen corresponding path program 5 times [2024-06-28 00:53:12,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:12,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846676481] [2024-06-28 00:53:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:12,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:13,109 INFO 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 00:53:13,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:13,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846676481] [2024-06-28 00:53:13,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846676481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:13,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:13,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:13,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220812420] [2024-06-28 00:53:13,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:13,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:13,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:13,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:13,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:13,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:13,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 147 transitions, 1453 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:13,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:13,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:13,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:13,629 INFO L124 PetriNetUnfolderBase]: 2431/3955 cut-off events. [2024-06-28 00:53:13,629 INFO L125 PetriNetUnfolderBase]: For 54196/54211 co-relation queries the response was YES. [2024-06-28 00:53:13,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19667 conditions, 3955 events. 2431/3955 cut-off events. For 54196/54211 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24728 event pairs, 536 based on Foata normal form. 24/3964 useless extension candidates. Maximal degree in co-relation 19609. Up to 3317 conditions per place. [2024-06-28 00:53:13,658 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 139 selfloop transitions, 30 changer transitions 0/182 dead transitions. [2024-06-28 00:53:13,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 182 transitions, 1911 flow [2024-06-28 00:53:13,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-28 00:53:13,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6592592592592592 [2024-06-28 00:53:13,660 INFO L175 Difference]: Start difference. First operand has 129 places, 147 transitions, 1453 flow. Second operand 6 states and 178 transitions. [2024-06-28 00:53:13,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 182 transitions, 1911 flow [2024-06-28 00:53:13,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 182 transitions, 1832 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 00:53:13,724 INFO L231 Difference]: Finished difference. Result has 129 places, 148 transitions, 1469 flow [2024-06-28 00:53:13,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1469, PETRI_PLACES=129, PETRI_TRANSITIONS=148} [2024-06-28 00:53:13,725 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 80 predicate places. [2024-06-28 00:53:13,725 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 148 transitions, 1469 flow [2024-06-28 00:53:13,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:13,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:13,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:13,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:53:13,726 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 00:53:13,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:13,726 INFO L85 PathProgramCache]: Analyzing trace with hash 529334783, now seen corresponding path program 6 times [2024-06-28 00:53:13,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:13,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738715236] [2024-06-28 00:53:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:13,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:13,854 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 00:53:13,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:13,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738715236] [2024-06-28 00:53:13,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738715236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:13,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:13,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:13,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219488216] [2024-06-28 00:53:13,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:13,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:13,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:13,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:13,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:13,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 148 transitions, 1469 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:13,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:13,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:13,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:14,415 INFO L124 PetriNetUnfolderBase]: 2411/3923 cut-off events. [2024-06-28 00:53:14,416 INFO L125 PetriNetUnfolderBase]: For 51893/51908 co-relation queries the response was YES. [2024-06-28 00:53:14,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19187 conditions, 3923 events. 2411/3923 cut-off events. For 51893/51908 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24450 event pairs, 373 based on Foata normal form. 20/3926 useless extension candidates. Maximal degree in co-relation 19128. Up to 2818 conditions per place. [2024-06-28 00:53:14,441 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 136 selfloop transitions, 36 changer transitions 0/185 dead transitions. [2024-06-28 00:53:14,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 185 transitions, 1921 flow [2024-06-28 00:53:14,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-28 00:53:14,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6703703703703704 [2024-06-28 00:53:14,442 INFO L175 Difference]: Start difference. First operand has 129 places, 148 transitions, 1469 flow. Second operand 6 states and 181 transitions. [2024-06-28 00:53:14,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 185 transitions, 1921 flow [2024-06-28 00:53:14,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 185 transitions, 1842 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:14,509 INFO L231 Difference]: Finished difference. Result has 131 places, 148 transitions, 1469 flow [2024-06-28 00:53:14,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1469, PETRI_PLACES=131, PETRI_TRANSITIONS=148} [2024-06-28 00:53:14,510 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 82 predicate places. [2024-06-28 00:53:14,510 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 148 transitions, 1469 flow [2024-06-28 00:53:14,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:14,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:14,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:14,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:53:14,510 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:14,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:14,511 INFO L85 PathProgramCache]: Analyzing trace with hash 535060235, now seen corresponding path program 1 times [2024-06-28 00:53:14,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:14,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925725993] [2024-06-28 00:53:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:14,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:14,649 INFO 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 00:53:14,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:14,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925725993] [2024-06-28 00:53:14,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925725993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:14,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:14,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:14,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350524472] [2024-06-28 00:53:14,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:14,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:14,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:14,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:14,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:14,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:14,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 148 transitions, 1469 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:14,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:14,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:14,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:15,178 INFO L124 PetriNetUnfolderBase]: 2478/4049 cut-off events. [2024-06-28 00:53:15,178 INFO L125 PetriNetUnfolderBase]: For 53902/53917 co-relation queries the response was YES. [2024-06-28 00:53:15,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19654 conditions, 4049 events. 2478/4049 cut-off events. For 53902/53917 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25541 event pairs, 463 based on Foata normal form. 22/4061 useless extension candidates. Maximal degree in co-relation 19594. Up to 3111 conditions per place. [2024-06-28 00:53:15,212 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 146 selfloop transitions, 39 changer transitions 0/198 dead transitions. [2024-06-28 00:53:15,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 198 transitions, 1993 flow [2024-06-28 00:53:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:53:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:53:15,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-28 00:53:15,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 00:53:15,213 INFO L175 Difference]: Start difference. First operand has 131 places, 148 transitions, 1469 flow. Second operand 8 states and 234 transitions. [2024-06-28 00:53:15,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 198 transitions, 1993 flow [2024-06-28 00:53:15,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 198 transitions, 1889 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:15,267 INFO L231 Difference]: Finished difference. Result has 134 places, 149 transitions, 1471 flow [2024-06-28 00:53:15,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1471, PETRI_PLACES=134, PETRI_TRANSITIONS=149} [2024-06-28 00:53:15,267 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 85 predicate places. [2024-06-28 00:53:15,268 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 149 transitions, 1471 flow [2024-06-28 00:53:15,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:15,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:15,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:15,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:53:15,268 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:15,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:15,269 INFO L85 PathProgramCache]: Analyzing trace with hash 885543247, now seen corresponding path program 2 times [2024-06-28 00:53:15,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:15,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519557189] [2024-06-28 00:53:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:15,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:15,385 INFO 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 00:53:15,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:15,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519557189] [2024-06-28 00:53:15,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519557189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:15,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:15,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:15,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135611945] [2024-06-28 00:53:15,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:15,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:15,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:15,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:15,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:15,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:15,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 149 transitions, 1471 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:15,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:15,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:15,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:15,912 INFO L124 PetriNetUnfolderBase]: 2489/4040 cut-off events. [2024-06-28 00:53:15,912 INFO L125 PetriNetUnfolderBase]: For 50887/50887 co-relation queries the response was YES. [2024-06-28 00:53:15,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19615 conditions, 4040 events. 2489/4040 cut-off events. For 50887/50887 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 25230 event pairs, 501 based on Foata normal form. 1/4039 useless extension candidates. Maximal degree in co-relation 19554. Up to 3655 conditions per place. [2024-06-28 00:53:15,959 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 140 selfloop transitions, 25 changer transitions 0/178 dead transitions. [2024-06-28 00:53:15,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 178 transitions, 1938 flow [2024-06-28 00:53:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-28 00:53:15,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-28 00:53:15,960 INFO L175 Difference]: Start difference. First operand has 134 places, 149 transitions, 1471 flow. Second operand 6 states and 169 transitions. [2024-06-28 00:53:15,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 178 transitions, 1938 flow [2024-06-28 00:53:16,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 178 transitions, 1848 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 00:53:16,054 INFO L231 Difference]: Finished difference. Result has 134 places, 153 transitions, 1464 flow [2024-06-28 00:53:16,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1464, PETRI_PLACES=134, PETRI_TRANSITIONS=153} [2024-06-28 00:53:16,056 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 85 predicate places. [2024-06-28 00:53:16,057 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 153 transitions, 1464 flow [2024-06-28 00:53:16,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:16,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:16,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:16,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:53:16,057 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 00:53:16,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:16,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1954280037, now seen corresponding path program 1 times [2024-06-28 00:53:16,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:16,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613446071] [2024-06-28 00:53:16,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:16,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:16,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:16,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613446071] [2024-06-28 00:53:16,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613446071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:16,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:16,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:16,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803039174] [2024-06-28 00:53:16,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:16,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:16,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:16,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:16,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:16,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:53:16,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 153 transitions, 1464 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 00:53:16,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:16,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:53:16,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:16,689 INFO L124 PetriNetUnfolderBase]: 2440/4247 cut-off events. [2024-06-28 00:53:16,690 INFO L125 PetriNetUnfolderBase]: For 55154/55167 co-relation queries the response was YES. [2024-06-28 00:53:16,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19435 conditions, 4247 events. 2440/4247 cut-off events. For 55154/55167 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 28161 event pairs, 651 based on Foata normal form. 16/4224 useless extension candidates. Maximal degree in co-relation 19373. Up to 3282 conditions per place. [2024-06-28 00:53:16,722 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 110 selfloop transitions, 57 changer transitions 0/191 dead transitions. [2024-06-28 00:53:16,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 191 transitions, 2094 flow [2024-06-28 00:53:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:16,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-28 00:53:16,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 00:53:16,723 INFO L175 Difference]: Start difference. First operand has 134 places, 153 transitions, 1464 flow. Second operand 6 states and 180 transitions. [2024-06-28 00:53:16,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 191 transitions, 2094 flow [2024-06-28 00:53:16,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 191 transitions, 2058 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-28 00:53:16,793 INFO L231 Difference]: Finished difference. Result has 139 places, 165 transitions, 1719 flow [2024-06-28 00:53:16,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1719, PETRI_PLACES=139, PETRI_TRANSITIONS=165} [2024-06-28 00:53:16,794 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 90 predicate places. [2024-06-28 00:53:16,794 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 165 transitions, 1719 flow [2024-06-28 00:53:16,794 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 00:53:16,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:16,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:16,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:53:16,795 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:16,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:16,796 INFO L85 PathProgramCache]: Analyzing trace with hash 125530225, now seen corresponding path program 2 times [2024-06-28 00:53:16,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:16,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565996648] [2024-06-28 00:53:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:16,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:16,917 INFO 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 00:53:16,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:16,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565996648] [2024-06-28 00:53:16,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565996648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:16,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:16,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:16,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9459490] [2024-06-28 00:53:16,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:16,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:16,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:16,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:16,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:16,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:16,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 165 transitions, 1719 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:16,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:16,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:16,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:17,558 INFO L124 PetriNetUnfolderBase]: 2603/4244 cut-off events. [2024-06-28 00:53:17,559 INFO L125 PetriNetUnfolderBase]: For 63485/63488 co-relation queries the response was YES. [2024-06-28 00:53:17,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21335 conditions, 4244 events. 2603/4244 cut-off events. For 63485/63488 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 26818 event pairs, 366 based on Foata normal form. 12/4246 useless extension candidates. Maximal degree in co-relation 21271. Up to 3367 conditions per place. [2024-06-28 00:53:17,595 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 162 selfloop transitions, 43 changer transitions 0/218 dead transitions. [2024-06-28 00:53:17,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 218 transitions, 2295 flow [2024-06-28 00:53:17,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:53:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:53:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-28 00:53:17,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6638888888888889 [2024-06-28 00:53:17,596 INFO L175 Difference]: Start difference. First operand has 139 places, 165 transitions, 1719 flow. Second operand 8 states and 239 transitions. [2024-06-28 00:53:17,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 218 transitions, 2295 flow [2024-06-28 00:53:17,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 218 transitions, 2238 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-28 00:53:17,704 INFO L231 Difference]: Finished difference. Result has 146 places, 166 transitions, 1780 flow [2024-06-28 00:53:17,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1780, PETRI_PLACES=146, PETRI_TRANSITIONS=166} [2024-06-28 00:53:17,704 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 97 predicate places. [2024-06-28 00:53:17,704 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 166 transitions, 1780 flow [2024-06-28 00:53:17,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:17,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:17,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:17,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:53:17,705 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:17,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:17,705 INFO L85 PathProgramCache]: Analyzing trace with hash 6320705, now seen corresponding path program 3 times [2024-06-28 00:53:17,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:17,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643467564] [2024-06-28 00:53:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:17,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:17,836 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 00:53:17,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:17,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643467564] [2024-06-28 00:53:17,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643467564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:17,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:17,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:17,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903534178] [2024-06-28 00:53:17,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:17,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:17,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:17,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:17,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:17,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:17,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 166 transitions, 1780 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:17,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:17,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:17,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:18,435 INFO L124 PetriNetUnfolderBase]: 2583/4314 cut-off events. [2024-06-28 00:53:18,435 INFO L125 PetriNetUnfolderBase]: For 63634/63649 co-relation queries the response was YES. [2024-06-28 00:53:18,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20895 conditions, 4314 events. 2583/4314 cut-off events. For 63634/63649 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28055 event pairs, 607 based on Foata normal form. 20/4286 useless extension candidates. Maximal degree in co-relation 20828. Up to 2675 conditions per place. [2024-06-28 00:53:18,471 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 154 selfloop transitions, 42 changer transitions 0/209 dead transitions. [2024-06-28 00:53:18,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 209 transitions, 2244 flow [2024-06-28 00:53:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:18,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-28 00:53:18,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6603174603174603 [2024-06-28 00:53:18,472 INFO L175 Difference]: Start difference. First operand has 146 places, 166 transitions, 1780 flow. Second operand 7 states and 208 transitions. [2024-06-28 00:53:18,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 209 transitions, 2244 flow [2024-06-28 00:53:18,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 209 transitions, 2138 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 00:53:18,571 INFO L231 Difference]: Finished difference. Result has 146 places, 165 transitions, 1712 flow [2024-06-28 00:53:18,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1624, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1712, PETRI_PLACES=146, PETRI_TRANSITIONS=165} [2024-06-28 00:53:18,572 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 97 predicate places. [2024-06-28 00:53:18,572 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 165 transitions, 1712 flow [2024-06-28 00:53:18,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:18,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:18,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:18,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:53:18,573 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 00:53:18,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:18,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1986424219, now seen corresponding path program 2 times [2024-06-28 00:53:18,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:18,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300366727] [2024-06-28 00:53:18,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:18,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:18,688 INFO 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 00:53:18,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:18,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300366727] [2024-06-28 00:53:18,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300366727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:18,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:18,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:18,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834119397] [2024-06-28 00:53:18,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:18,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:18,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:18,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:18,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:18,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:53:18,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 165 transitions, 1712 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 00:53:18,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:18,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:53:18,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:19,177 INFO L124 PetriNetUnfolderBase]: 2542/4224 cut-off events. [2024-06-28 00:53:19,178 INFO L125 PetriNetUnfolderBase]: For 59919/59925 co-relation queries the response was YES. [2024-06-28 00:53:19,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20678 conditions, 4224 events. 2542/4224 cut-off events. For 59919/59925 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 27392 event pairs, 512 based on Foata normal form. 9/4200 useless extension candidates. Maximal degree in co-relation 20610. Up to 3521 conditions per place. [2024-06-28 00:53:19,210 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 131 selfloop transitions, 50 changer transitions 0/205 dead transitions. [2024-06-28 00:53:19,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 205 transitions, 2391 flow [2024-06-28 00:53:19,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:19,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-28 00:53:19,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-28 00:53:19,212 INFO L175 Difference]: Start difference. First operand has 146 places, 165 transitions, 1712 flow. Second operand 6 states and 182 transitions. [2024-06-28 00:53:19,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 205 transitions, 2391 flow [2024-06-28 00:53:19,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 205 transitions, 2248 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 00:53:19,308 INFO L231 Difference]: Finished difference. Result has 146 places, 175 transitions, 1837 flow [2024-06-28 00:53:19,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1837, PETRI_PLACES=146, PETRI_TRANSITIONS=175} [2024-06-28 00:53:19,309 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 97 predicate places. [2024-06-28 00:53:19,309 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 175 transitions, 1837 flow [2024-06-28 00:53:19,309 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 00:53:19,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:19,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:19,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:53:19,309 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 00:53:19,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:19,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2144906841, now seen corresponding path program 3 times [2024-06-28 00:53:19,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:19,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498994146] [2024-06-28 00:53:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:19,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:19,420 INFO 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 00:53:19,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:19,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498994146] [2024-06-28 00:53:19,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498994146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:19,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:19,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:19,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088122726] [2024-06-28 00:53:19,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:19,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:19,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:19,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:19,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:19,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:19,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 175 transitions, 1837 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:19,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:19,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:19,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:19,891 INFO L124 PetriNetUnfolderBase]: 2640/4302 cut-off events. [2024-06-28 00:53:19,892 INFO L125 PetriNetUnfolderBase]: For 59127/59127 co-relation queries the response was YES. [2024-06-28 00:53:19,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20705 conditions, 4302 events. 2640/4302 cut-off events. For 59127/59127 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 27325 event pairs, 513 based on Foata normal form. 2/4300 useless extension candidates. Maximal degree in co-relation 20637. Up to 3875 conditions per place. [2024-06-28 00:53:19,933 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 172 selfloop transitions, 26 changer transitions 0/211 dead transitions. [2024-06-28 00:53:19,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 211 transitions, 2376 flow [2024-06-28 00:53:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:53:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:53:19,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-28 00:53:19,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6755555555555556 [2024-06-28 00:53:19,934 INFO L175 Difference]: Start difference. First operand has 146 places, 175 transitions, 1837 flow. Second operand 5 states and 152 transitions. [2024-06-28 00:53:19,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 211 transitions, 2376 flow [2024-06-28 00:53:20,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 211 transitions, 2329 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-28 00:53:20,026 INFO L231 Difference]: Finished difference. Result has 152 places, 184 transitions, 1967 flow [2024-06-28 00:53:20,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1967, PETRI_PLACES=152, PETRI_TRANSITIONS=184} [2024-06-28 00:53:20,027 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 103 predicate places. [2024-06-28 00:53:20,027 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 184 transitions, 1967 flow [2024-06-28 00:53:20,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:20,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:20,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:20,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:53:20,028 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 00:53:20,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:20,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1598067743, now seen corresponding path program 1 times [2024-06-28 00:53:20,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:20,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171384631] [2024-06-28 00:53:20,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:20,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:20,131 INFO 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 00:53:20,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:20,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171384631] [2024-06-28 00:53:20,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171384631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:20,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:20,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:20,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712818713] [2024-06-28 00:53:20,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:20,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:20,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:20,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:20,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:20,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:20,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 184 transitions, 1967 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:20,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:20,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:20,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:20,594 INFO L124 PetriNetUnfolderBase]: 2648/4377 cut-off events. [2024-06-28 00:53:20,594 INFO L125 PetriNetUnfolderBase]: For 64391/64406 co-relation queries the response was YES. [2024-06-28 00:53:20,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21420 conditions, 4377 events. 2648/4377 cut-off events. For 64391/64406 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28320 event pairs, 561 based on Foata normal form. 12/4367 useless extension candidates. Maximal degree in co-relation 21348. Up to 3743 conditions per place. [2024-06-28 00:53:20,631 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 155 selfloop transitions, 41 changer transitions 0/209 dead transitions. [2024-06-28 00:53:20,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 209 transitions, 2585 flow [2024-06-28 00:53:20,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:53:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:53:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-28 00:53:20,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488888888888888 [2024-06-28 00:53:20,632 INFO L175 Difference]: Start difference. First operand has 152 places, 184 transitions, 1967 flow. Second operand 5 states and 146 transitions. [2024-06-28 00:53:20,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 209 transitions, 2585 flow [2024-06-28 00:53:20,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 209 transitions, 2575 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-28 00:53:20,734 INFO L231 Difference]: Finished difference. Result has 158 places, 189 transitions, 2133 flow [2024-06-28 00:53:20,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2133, PETRI_PLACES=158, PETRI_TRANSITIONS=189} [2024-06-28 00:53:20,735 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 109 predicate places. [2024-06-28 00:53:20,735 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 189 transitions, 2133 flow [2024-06-28 00:53:20,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:20,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:20,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:20,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:53:20,735 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:20,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:20,736 INFO L85 PathProgramCache]: Analyzing trace with hash 651956617, now seen corresponding path program 2 times [2024-06-28 00:53:20,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:20,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930502014] [2024-06-28 00:53:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:20,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:20,851 INFO 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 00:53:20,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:20,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930502014] [2024-06-28 00:53:20,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930502014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:20,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:20,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:20,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626898511] [2024-06-28 00:53:20,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:20,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:20,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:20,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:20,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:20,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:20,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 189 transitions, 2133 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:20,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:20,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:20,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:21,453 INFO L124 PetriNetUnfolderBase]: 2630/4309 cut-off events. [2024-06-28 00:53:21,453 INFO L125 PetriNetUnfolderBase]: For 65016/65019 co-relation queries the response was YES. [2024-06-28 00:53:21,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21561 conditions, 4309 events. 2630/4309 cut-off events. For 65016/65019 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27545 event pairs, 520 based on Foata normal form. 6/4307 useless extension candidates. Maximal degree in co-relation 21485. Up to 3723 conditions per place. [2024-06-28 00:53:21,484 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 155 selfloop transitions, 45 changer transitions 0/213 dead transitions. [2024-06-28 00:53:21,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 213 transitions, 2591 flow [2024-06-28 00:53:21,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:53:21,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:53:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-28 00:53:21,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-28 00:53:21,485 INFO L175 Difference]: Start difference. First operand has 158 places, 189 transitions, 2133 flow. Second operand 5 states and 153 transitions. [2024-06-28 00:53:21,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 213 transitions, 2591 flow [2024-06-28 00:53:21,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 213 transitions, 2512 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-28 00:53:21,619 INFO L231 Difference]: Finished difference. Result has 162 places, 189 transitions, 2165 flow [2024-06-28 00:53:21,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2165, PETRI_PLACES=162, PETRI_TRANSITIONS=189} [2024-06-28 00:53:21,620 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 113 predicate places. [2024-06-28 00:53:21,620 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 189 transitions, 2165 flow [2024-06-28 00:53:21,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:21,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:21,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:53:21,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:53:21,621 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:21,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:21,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2139766657, now seen corresponding path program 1 times [2024-06-28 00:53:21,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:21,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927858776] [2024-06-28 00:53:21,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:21,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:21,745 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 00:53:21,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:21,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927858776] [2024-06-28 00:53:21,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927858776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:21,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:21,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:53:21,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865826822] [2024-06-28 00:53:21,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:21,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:53:21,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:21,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:53:21,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:53:21,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:53:21,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 189 transitions, 2165 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 00:53:21,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:21,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:53:21,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:22,265 INFO L124 PetriNetUnfolderBase]: 2536/4265 cut-off events. [2024-06-28 00:53:22,265 INFO L125 PetriNetUnfolderBase]: For 69145/69151 co-relation queries the response was YES. [2024-06-28 00:53:22,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21059 conditions, 4265 events. 2536/4265 cut-off events. For 69145/69151 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27898 event pairs, 911 based on Foata normal form. 10/4217 useless extension candidates. Maximal degree in co-relation 20981. Up to 3682 conditions per place. [2024-06-28 00:53:22,306 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 163 selfloop transitions, 14 changer transitions 0/204 dead transitions. [2024-06-28 00:53:22,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 204 transitions, 2571 flow [2024-06-28 00:53:22,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:53:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:53:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-06-28 00:53:22,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:53:22,308 INFO L175 Difference]: Start difference. First operand has 162 places, 189 transitions, 2165 flow. Second operand 4 states and 116 transitions. [2024-06-28 00:53:22,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 204 transitions, 2571 flow [2024-06-28 00:53:22,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 204 transitions, 2502 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:22,430 INFO L231 Difference]: Finished difference. Result has 162 places, 191 transitions, 2156 flow [2024-06-28 00:53:22,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2156, PETRI_PLACES=162, PETRI_TRANSITIONS=191} [2024-06-28 00:53:22,431 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 113 predicate places. [2024-06-28 00:53:22,431 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 191 transitions, 2156 flow [2024-06-28 00:53:22,431 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 00:53:22,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:22,432 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 00:53:22,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:53:22,432 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:22,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:22,432 INFO L85 PathProgramCache]: Analyzing trace with hash 443874179, now seen corresponding path program 1 times [2024-06-28 00:53:22,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:22,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743502594] [2024-06-28 00:53:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:22,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:22,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:22,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743502594] [2024-06-28 00:53:22,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743502594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:22,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:22,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:22,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023575466] [2024-06-28 00:53:22,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:22,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:22,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:22,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:22,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:22,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:22,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 191 transitions, 2156 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:22,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:22,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:22,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:23,167 INFO L124 PetriNetUnfolderBase]: 2631/4421 cut-off events. [2024-06-28 00:53:23,167 INFO L125 PetriNetUnfolderBase]: For 66259/66259 co-relation queries the response was YES. [2024-06-28 00:53:23,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21655 conditions, 4421 events. 2631/4421 cut-off events. For 66259/66259 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 28904 event pairs, 920 based on Foata normal form. 1/4384 useless extension candidates. Maximal degree in co-relation 21577. Up to 3800 conditions per place. [2024-06-28 00:53:23,205 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 182 selfloop transitions, 41 changer transitions 0/236 dead transitions. [2024-06-28 00:53:23,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 236 transitions, 2832 flow [2024-06-28 00:53:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:23,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-28 00:53:23,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317460317460317 [2024-06-28 00:53:23,207 INFO L175 Difference]: Start difference. First operand has 162 places, 191 transitions, 2156 flow. Second operand 7 states and 199 transitions. [2024-06-28 00:53:23,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 236 transitions, 2832 flow [2024-06-28 00:53:23,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 236 transitions, 2790 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-28 00:53:23,328 INFO L231 Difference]: Finished difference. Result has 168 places, 202 transitions, 2317 flow [2024-06-28 00:53:23,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2317, PETRI_PLACES=168, PETRI_TRANSITIONS=202} [2024-06-28 00:53:23,328 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 119 predicate places. [2024-06-28 00:53:23,328 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 202 transitions, 2317 flow [2024-06-28 00:53:23,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:23,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:23,329 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 00:53:23,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:53:23,329 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:23,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:23,329 INFO L85 PathProgramCache]: Analyzing trace with hash 453128609, now seen corresponding path program 2 times [2024-06-28 00:53:23,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:23,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733542956] [2024-06-28 00:53:23,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:23,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:23,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:23,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733542956] [2024-06-28 00:53:23,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733542956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:23,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:23,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:23,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986645339] [2024-06-28 00:53:23,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:23,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:23,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:23,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:23,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:23,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:23,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 202 transitions, 2317 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:23,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:23,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:23,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:23,965 INFO L124 PetriNetUnfolderBase]: 2656/4401 cut-off events. [2024-06-28 00:53:23,965 INFO L125 PetriNetUnfolderBase]: For 71147/71147 co-relation queries the response was YES. [2024-06-28 00:53:24,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22398 conditions, 4401 events. 2656/4401 cut-off events. For 71147/71147 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28269 event pairs, 652 based on Foata normal form. 1/4393 useless extension candidates. Maximal degree in co-relation 22318. Up to 3827 conditions per place. [2024-06-28 00:53:24,024 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 180 selfloop transitions, 45 changer transitions 0/238 dead transitions. [2024-06-28 00:53:24,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 238 transitions, 3044 flow [2024-06-28 00:53:24,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:24,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-28 00:53:24,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 00:53:24,025 INFO L175 Difference]: Start difference. First operand has 168 places, 202 transitions, 2317 flow. Second operand 7 states and 196 transitions. [2024-06-28 00:53:24,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 238 transitions, 3044 flow [2024-06-28 00:53:24,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 238 transitions, 3000 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-28 00:53:24,260 INFO L231 Difference]: Finished difference. Result has 173 places, 209 transitions, 2444 flow [2024-06-28 00:53:24,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2444, PETRI_PLACES=173, PETRI_TRANSITIONS=209} [2024-06-28 00:53:24,261 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 124 predicate places. [2024-06-28 00:53:24,262 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 209 transitions, 2444 flow [2024-06-28 00:53:24,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:24,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:24,262 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 00:53:24,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:53:24,263 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:24,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:24,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1687178957, now seen corresponding path program 3 times [2024-06-28 00:53:24,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:24,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61300565] [2024-06-28 00:53:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:24,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:24,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:24,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61300565] [2024-06-28 00:53:24,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61300565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:24,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:24,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:24,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592578543] [2024-06-28 00:53:24,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:24,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:24,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:24,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:24,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 209 transitions, 2444 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:24,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:24,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:24,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:24,981 INFO L124 PetriNetUnfolderBase]: 2653/4442 cut-off events. [2024-06-28 00:53:24,981 INFO L125 PetriNetUnfolderBase]: For 73408/73408 co-relation queries the response was YES. [2024-06-28 00:53:25,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22560 conditions, 4442 events. 2653/4442 cut-off events. For 73408/73408 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 29031 event pairs, 913 based on Foata normal form. 1/4407 useless extension candidates. Maximal degree in co-relation 22478. Up to 3824 conditions per place. [2024-06-28 00:53:25,026 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 178 selfloop transitions, 46 changer transitions 0/237 dead transitions. [2024-06-28 00:53:25,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 237 transitions, 3026 flow [2024-06-28 00:53:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:25,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-28 00:53:25,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158730158730159 [2024-06-28 00:53:25,028 INFO L175 Difference]: Start difference. First operand has 173 places, 209 transitions, 2444 flow. Second operand 7 states and 194 transitions. [2024-06-28 00:53:25,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 237 transitions, 3026 flow [2024-06-28 00:53:25,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 237 transitions, 2947 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-28 00:53:25,184 INFO L231 Difference]: Finished difference. Result has 178 places, 209 transitions, 2463 flow [2024-06-28 00:53:25,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2463, PETRI_PLACES=178, PETRI_TRANSITIONS=209} [2024-06-28 00:53:25,184 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 129 predicate places. [2024-06-28 00:53:25,184 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 209 transitions, 2463 flow [2024-06-28 00:53:25,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:25,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:25,185 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 00:53:25,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:53:25,185 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:25,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:25,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1894898243, now seen corresponding path program 4 times [2024-06-28 00:53:25,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:25,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157966599] [2024-06-28 00:53:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:25,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:25,303 INFO 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 00:53:25,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:25,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157966599] [2024-06-28 00:53:25,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157966599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:25,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:25,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:25,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025138113] [2024-06-28 00:53:25,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:25,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:25,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:25,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:25,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:25,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:25,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 209 transitions, 2463 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:25,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:25,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:25,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:25,860 INFO L124 PetriNetUnfolderBase]: 2664/4421 cut-off events. [2024-06-28 00:53:25,860 INFO L125 PetriNetUnfolderBase]: For 77891/77891 co-relation queries the response was YES. [2024-06-28 00:53:25,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22692 conditions, 4421 events. 2664/4421 cut-off events. For 77891/77891 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28515 event pairs, 651 based on Foata normal form. 1/4415 useless extension candidates. Maximal degree in co-relation 22609. Up to 3885 conditions per place. [2024-06-28 00:53:25,901 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 196 selfloop transitions, 34 changer transitions 0/243 dead transitions. [2024-06-28 00:53:25,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 243 transitions, 3108 flow [2024-06-28 00:53:25,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:25,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 00:53:25,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-28 00:53:25,902 INFO L175 Difference]: Start difference. First operand has 178 places, 209 transitions, 2463 flow. Second operand 6 states and 176 transitions. [2024-06-28 00:53:25,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 243 transitions, 3108 flow [2024-06-28 00:53:26,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 243 transitions, 3012 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:26,137 INFO L231 Difference]: Finished difference. Result has 179 places, 212 transitions, 2480 flow [2024-06-28 00:53:26,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2480, PETRI_PLACES=179, PETRI_TRANSITIONS=212} [2024-06-28 00:53:26,137 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 130 predicate places. [2024-06-28 00:53:26,138 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 212 transitions, 2480 flow [2024-06-28 00:53:26,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:26,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:26,138 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 00:53:26,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:53:26,138 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:26,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:26,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2067590333, now seen corresponding path program 5 times [2024-06-28 00:53:26,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:26,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070407360] [2024-06-28 00:53:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:26,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:26,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:26,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070407360] [2024-06-28 00:53:26,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070407360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:26,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:26,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:26,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302882613] [2024-06-28 00:53:26,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:26,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:26,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:26,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:26,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:26,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:26,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 212 transitions, 2480 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:26,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:26,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:26,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:26,776 INFO L124 PetriNetUnfolderBase]: 2661/4413 cut-off events. [2024-06-28 00:53:26,776 INFO L125 PetriNetUnfolderBase]: For 80239/80239 co-relation queries the response was YES. [2024-06-28 00:53:26,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22674 conditions, 4413 events. 2661/4413 cut-off events. For 80239/80239 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28471 event pairs, 655 based on Foata normal form. 1/4405 useless extension candidates. Maximal degree in co-relation 22590. Up to 3882 conditions per place. [2024-06-28 00:53:26,814 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 191 selfloop transitions, 32 changer transitions 0/236 dead transitions. [2024-06-28 00:53:26,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 236 transitions, 2982 flow [2024-06-28 00:53:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-28 00:53:26,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6259259259259259 [2024-06-28 00:53:26,815 INFO L175 Difference]: Start difference. First operand has 179 places, 212 transitions, 2480 flow. Second operand 6 states and 169 transitions. [2024-06-28 00:53:26,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 236 transitions, 2982 flow [2024-06-28 00:53:26,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 236 transitions, 2874 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:26,953 INFO L231 Difference]: Finished difference. Result has 181 places, 212 transitions, 2442 flow [2024-06-28 00:53:26,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2442, PETRI_PLACES=181, PETRI_TRANSITIONS=212} [2024-06-28 00:53:26,954 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 132 predicate places. [2024-06-28 00:53:26,954 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 212 transitions, 2442 flow [2024-06-28 00:53:26,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:26,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:26,955 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 00:53:26,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:53:26,955 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:26,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:26,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1999508657, now seen corresponding path program 1 times [2024-06-28 00:53:26,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:26,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10614714] [2024-06-28 00:53:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:26,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:27,063 INFO 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 00:53:27,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:27,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10614714] [2024-06-28 00:53:27,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10614714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:27,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:27,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:27,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768641526] [2024-06-28 00:53:27,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:27,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:27,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:27,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:27,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:27,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:27,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 212 transitions, 2442 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:27,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:27,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:27,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:27,575 INFO L124 PetriNetUnfolderBase]: 2669/4410 cut-off events. [2024-06-28 00:53:27,576 INFO L125 PetriNetUnfolderBase]: For 85736/85751 co-relation queries the response was YES. [2024-06-28 00:53:27,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22750 conditions, 4410 events. 2669/4410 cut-off events. For 85736/85751 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28590 event pairs, 594 based on Foata normal form. 12/4392 useless extension candidates. Maximal degree in co-relation 22665. Up to 3598 conditions per place. [2024-06-28 00:53:27,614 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 151 selfloop transitions, 74 changer transitions 0/238 dead transitions. [2024-06-28 00:53:27,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 238 transitions, 3141 flow [2024-06-28 00:53:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:27,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-28 00:53:27,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-28 00:53:27,615 INFO L175 Difference]: Start difference. First operand has 181 places, 212 transitions, 2442 flow. Second operand 6 states and 172 transitions. [2024-06-28 00:53:27,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 238 transitions, 3141 flow [2024-06-28 00:53:27,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 238 transitions, 3035 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:27,866 INFO L231 Difference]: Finished difference. Result has 182 places, 215 transitions, 2536 flow [2024-06-28 00:53:27,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2536, PETRI_PLACES=182, PETRI_TRANSITIONS=215} [2024-06-28 00:53:27,867 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 133 predicate places. [2024-06-28 00:53:27,867 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 215 transitions, 2536 flow [2024-06-28 00:53:27,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:27,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:27,867 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 00:53:27,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:53:27,868 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:27,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:27,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1264180215, now seen corresponding path program 2 times [2024-06-28 00:53:27,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:27,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997133032] [2024-06-28 00:53:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:27,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:27,984 INFO 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 00:53:27,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:27,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997133032] [2024-06-28 00:53:27,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997133032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:27,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:27,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:27,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462317221] [2024-06-28 00:53:27,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:27,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:27,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:27,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:27,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:28,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:28,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 215 transitions, 2536 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:28,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:28,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:28,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:28,501 INFO L124 PetriNetUnfolderBase]: 2677/4414 cut-off events. [2024-06-28 00:53:28,501 INFO L125 PetriNetUnfolderBase]: For 88502/88505 co-relation queries the response was YES. [2024-06-28 00:53:28,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23070 conditions, 4414 events. 2677/4414 cut-off events. For 88502/88505 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28468 event pairs, 521 based on Foata normal form. 4/4401 useless extension candidates. Maximal degree in co-relation 22985. Up to 3732 conditions per place. [2024-06-28 00:53:28,543 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 175 selfloop transitions, 59 changer transitions 0/247 dead transitions. [2024-06-28 00:53:28,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 247 transitions, 3282 flow [2024-06-28 00:53:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:28,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-28 00:53:28,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-06-28 00:53:28,544 INFO L175 Difference]: Start difference. First operand has 182 places, 215 transitions, 2536 flow. Second operand 6 states and 179 transitions. [2024-06-28 00:53:28,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 247 transitions, 3282 flow [2024-06-28 00:53:28,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 247 transitions, 3081 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:28,739 INFO L231 Difference]: Finished difference. Result has 184 places, 218 transitions, 2514 flow [2024-06-28 00:53:28,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2341, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2514, PETRI_PLACES=184, PETRI_TRANSITIONS=218} [2024-06-28 00:53:28,740 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 135 predicate places. [2024-06-28 00:53:28,740 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 218 transitions, 2514 flow [2024-06-28 00:53:28,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:28,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:28,741 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 00:53:28,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:53:28,741 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:28,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:28,741 INFO L85 PathProgramCache]: Analyzing trace with hash 866617038, now seen corresponding path program 1 times [2024-06-28 00:53:28,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:28,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257753893] [2024-06-28 00:53:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:28,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:28,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:28,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257753893] [2024-06-28 00:53:28,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257753893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:28,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:28,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:28,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935703727] [2024-06-28 00:53:28,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:28,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:28,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:28,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:28,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:28,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:28,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 218 transitions, 2514 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:28,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:28,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:28,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:29,521 INFO L124 PetriNetUnfolderBase]: 2695/4475 cut-off events. [2024-06-28 00:53:29,521 INFO L125 PetriNetUnfolderBase]: For 89457/89457 co-relation queries the response was YES. [2024-06-28 00:53:29,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23127 conditions, 4475 events. 2695/4475 cut-off events. For 89457/89457 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28825 event pairs, 507 based on Foata normal form. 2/4472 useless extension candidates. Maximal degree in co-relation 23042. Up to 3870 conditions per place. [2024-06-28 00:53:29,564 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 217 selfloop transitions, 31 changer transitions 0/261 dead transitions. [2024-06-28 00:53:29,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 261 transitions, 3210 flow [2024-06-28 00:53:29,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:29,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-28 00:53:29,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-28 00:53:29,566 INFO L175 Difference]: Start difference. First operand has 184 places, 218 transitions, 2514 flow. Second operand 7 states and 200 transitions. [2024-06-28 00:53:29,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 261 transitions, 3210 flow [2024-06-28 00:53:29,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 261 transitions, 3062 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:29,812 INFO L231 Difference]: Finished difference. Result has 187 places, 222 transitions, 2465 flow [2024-06-28 00:53:29,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2366, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2465, PETRI_PLACES=187, PETRI_TRANSITIONS=222} [2024-06-28 00:53:29,813 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 138 predicate places. [2024-06-28 00:53:29,813 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 222 transitions, 2465 flow [2024-06-28 00:53:29,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:29,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:29,813 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 00:53:29,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:53:29,814 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:29,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:29,814 INFO L85 PathProgramCache]: Analyzing trace with hash 475697082, now seen corresponding path program 2 times [2024-06-28 00:53:29,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:29,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368421079] [2024-06-28 00:53:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:29,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:29,948 INFO 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 00:53:29,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:29,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368421079] [2024-06-28 00:53:29,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368421079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:29,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:29,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:29,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211497878] [2024-06-28 00:53:29,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:29,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:29,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:29,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:29,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:29,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:29,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 222 transitions, 2465 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:29,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:29,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:29,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:30,486 INFO L124 PetriNetUnfolderBase]: 2713/4413 cut-off events. [2024-06-28 00:53:30,486 INFO L125 PetriNetUnfolderBase]: For 91721/91721 co-relation queries the response was YES. [2024-06-28 00:53:30,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23145 conditions, 4413 events. 2713/4413 cut-off events. For 91721/91721 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28086 event pairs, 496 based on Foata normal form. 2/4413 useless extension candidates. Maximal degree in co-relation 23059. Up to 3963 conditions per place. [2024-06-28 00:53:30,527 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 217 selfloop transitions, 28 changer transitions 0/258 dead transitions. [2024-06-28 00:53:30,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 258 transitions, 3053 flow [2024-06-28 00:53:30,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-28 00:53:30,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-28 00:53:30,528 INFO L175 Difference]: Start difference. First operand has 187 places, 222 transitions, 2465 flow. Second operand 7 states and 195 transitions. [2024-06-28 00:53:30,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 258 transitions, 3053 flow [2024-06-28 00:53:30,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 258 transitions, 3007 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-28 00:53:30,725 INFO L231 Difference]: Finished difference. Result has 192 places, 224 transitions, 2502 flow [2024-06-28 00:53:30,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2502, PETRI_PLACES=192, PETRI_TRANSITIONS=224} [2024-06-28 00:53:30,725 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 143 predicate places. [2024-06-28 00:53:30,726 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 224 transitions, 2502 flow [2024-06-28 00:53:30,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:30,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:30,726 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 00:53:30,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:53:30,726 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:30,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:30,727 INFO L85 PathProgramCache]: Analyzing trace with hash -611496998, now seen corresponding path program 1 times [2024-06-28 00:53:30,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:30,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578112529] [2024-06-28 00:53:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:30,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:30,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:30,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578112529] [2024-06-28 00:53:30,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578112529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:30,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:30,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:30,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528060502] [2024-06-28 00:53:30,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:30,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:30,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:30,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:30,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:30,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:30,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 224 transitions, 2502 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:30,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:30,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:30,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:31,470 INFO L124 PetriNetUnfolderBase]: 2752/4522 cut-off events. [2024-06-28 00:53:31,470 INFO L125 PetriNetUnfolderBase]: For 99397/99400 co-relation queries the response was YES. [2024-06-28 00:53:31,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23725 conditions, 4522 events. 2752/4522 cut-off events. For 99397/99400 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 29259 event pairs, 546 based on Foata normal form. 1/4498 useless extension candidates. Maximal degree in co-relation 23637. Up to 3645 conditions per place. [2024-06-28 00:53:31,509 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 188 selfloop transitions, 76 changer transitions 0/277 dead transitions. [2024-06-28 00:53:31,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 277 transitions, 3608 flow [2024-06-28 00:53:31,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:31,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-28 00:53:31,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-28 00:53:31,510 INFO L175 Difference]: Start difference. First operand has 192 places, 224 transitions, 2502 flow. Second operand 7 states and 211 transitions. [2024-06-28 00:53:31,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 277 transitions, 3608 flow [2024-06-28 00:53:31,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 277 transitions, 3553 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:31,731 INFO L231 Difference]: Finished difference. Result has 194 places, 237 transitions, 2761 flow [2024-06-28 00:53:31,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2761, PETRI_PLACES=194, PETRI_TRANSITIONS=237} [2024-06-28 00:53:31,732 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 145 predicate places. [2024-06-28 00:53:31,732 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 237 transitions, 2761 flow [2024-06-28 00:53:31,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:31,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:31,732 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 00:53:31,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:53:31,732 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:31,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:31,733 INFO L85 PathProgramCache]: Analyzing trace with hash 875190894, now seen corresponding path program 2 times [2024-06-28 00:53:31,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:31,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771988485] [2024-06-28 00:53:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:31,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:31,846 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 00:53:31,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:31,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771988485] [2024-06-28 00:53:31,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771988485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:31,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:31,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:31,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309873080] [2024-06-28 00:53:31,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:31,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:31,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:31,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:31,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:31,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:31,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 237 transitions, 2761 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:31,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:31,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:31,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:32,489 INFO L124 PetriNetUnfolderBase]: 2791/4583 cut-off events. [2024-06-28 00:53:32,489 INFO L125 PetriNetUnfolderBase]: For 108636/108639 co-relation queries the response was YES. [2024-06-28 00:53:32,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25066 conditions, 4583 events. 2791/4583 cut-off events. For 108636/108639 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 29678 event pairs, 546 based on Foata normal form. 1/4559 useless extension candidates. Maximal degree in co-relation 24977. Up to 3678 conditions per place. [2024-06-28 00:53:32,536 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 185 selfloop transitions, 83 changer transitions 0/281 dead transitions. [2024-06-28 00:53:32,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 281 transitions, 3823 flow [2024-06-28 00:53:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-28 00:53:32,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-28 00:53:32,537 INFO L175 Difference]: Start difference. First operand has 194 places, 237 transitions, 2761 flow. Second operand 7 states and 209 transitions. [2024-06-28 00:53:32,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 281 transitions, 3823 flow [2024-06-28 00:53:32,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 281 transitions, 3713 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-28 00:53:32,767 INFO L231 Difference]: Finished difference. Result has 200 places, 244 transitions, 2919 flow [2024-06-28 00:53:32,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2677, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2919, PETRI_PLACES=200, PETRI_TRANSITIONS=244} [2024-06-28 00:53:32,767 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 151 predicate places. [2024-06-28 00:53:32,767 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 244 transitions, 2919 flow [2024-06-28 00:53:32,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:32,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:32,768 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 00:53:32,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:53:32,768 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:53:32,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:32,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1162075248, now seen corresponding path program 3 times [2024-06-28 00:53:32,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:32,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226031635] [2024-06-28 00:53:32,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:32,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:32,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:32,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226031635] [2024-06-28 00:53:32,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226031635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:32,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:32,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:32,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680274893] [2024-06-28 00:53:32,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:32,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:32,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:32,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:32,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:32,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:32,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 244 transitions, 2919 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:32,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:32,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:32,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:33,599 INFO L124 PetriNetUnfolderBase]: 2809/4557 cut-off events. [2024-06-28 00:53:33,599 INFO L125 PetriNetUnfolderBase]: For 111488/111488 co-relation queries the response was YES. [2024-06-28 00:53:33,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25485 conditions, 4557 events. 2809/4557 cut-off events. For 111488/111488 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 29062 event pairs, 497 based on Foata normal form. 2/4557 useless extension candidates. Maximal degree in co-relation 25393. Up to 4095 conditions per place. [2024-06-28 00:53:33,647 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 234 selfloop transitions, 27 changer transitions 0/274 dead transitions. [2024-06-28 00:53:33,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 274 transitions, 3519 flow [2024-06-28 00:53:33,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:33,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-28 00:53:33,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-28 00:53:33,648 INFO L175 Difference]: Start difference. First operand has 200 places, 244 transitions, 2919 flow. Second operand 7 states and 190 transitions. [2024-06-28 00:53:33,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 274 transitions, 3519 flow [2024-06-28 00:53:33,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 274 transitions, 3378 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:33,870 INFO L231 Difference]: Finished difference. Result has 204 places, 246 transitions, 2855 flow [2024-06-28 00:53:33,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2855, PETRI_PLACES=204, PETRI_TRANSITIONS=246} [2024-06-28 00:53:33,871 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 155 predicate places. [2024-06-28 00:53:33,871 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 246 transitions, 2855 flow [2024-06-28 00:53:33,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:33,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:33,871 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 00:53:33,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:53:33,872 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 00:53:33,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:33,872 INFO L85 PathProgramCache]: Analyzing trace with hash 984768144, now seen corresponding path program 3 times [2024-06-28 00:53:33,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:33,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243638079] [2024-06-28 00:53:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:33,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:33,999 INFO 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 00:53:33,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:33,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243638079] [2024-06-28 00:53:33,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243638079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:33,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:33,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:33,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877637112] [2024-06-28 00:53:33,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:33,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:33,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:34,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:34,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:34,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:34,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 246 transitions, 2855 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:34,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:34,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:34,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:34,596 INFO L124 PetriNetUnfolderBase]: 2856/4647 cut-off events. [2024-06-28 00:53:34,596 INFO L125 PetriNetUnfolderBase]: For 116495/116498 co-relation queries the response was YES. [2024-06-28 00:53:34,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25775 conditions, 4647 events. 2856/4647 cut-off events. For 116495/116498 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29890 event pairs, 531 based on Foata normal form. 1/4633 useless extension candidates. Maximal degree in co-relation 25682. Up to 3987 conditions per place. [2024-06-28 00:53:34,642 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 221 selfloop transitions, 60 changer transitions 0/294 dead transitions. [2024-06-28 00:53:34,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 294 transitions, 3940 flow [2024-06-28 00:53:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-28 00:53:34,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-28 00:53:34,643 INFO L175 Difference]: Start difference. First operand has 204 places, 246 transitions, 2855 flow. Second operand 7 states and 204 transitions. [2024-06-28 00:53:34,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 294 transitions, 3940 flow [2024-06-28 00:53:34,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 294 transitions, 3883 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:34,935 INFO L231 Difference]: Finished difference. Result has 207 places, 258 transitions, 3114 flow [2024-06-28 00:53:34,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2798, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3114, PETRI_PLACES=207, PETRI_TRANSITIONS=258} [2024-06-28 00:53:34,935 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 158 predicate places. [2024-06-28 00:53:34,936 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 258 transitions, 3114 flow [2024-06-28 00:53:34,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:34,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:34,936 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 00:53:34,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:53:34,936 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 00:53:34,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash 985066674, now seen corresponding path program 4 times [2024-06-28 00:53:34,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:34,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666559569] [2024-06-28 00:53:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:34,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:35,051 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 00:53:35,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:35,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666559569] [2024-06-28 00:53:35,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666559569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:35,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:35,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:35,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284172027] [2024-06-28 00:53:35,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:35,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:35,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:35,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:35,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:35,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 258 transitions, 3114 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:35,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:35,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:35,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:35,771 INFO L124 PetriNetUnfolderBase]: 2878/4717 cut-off events. [2024-06-28 00:53:35,771 INFO L125 PetriNetUnfolderBase]: For 124503/124506 co-relation queries the response was YES. [2024-06-28 00:53:35,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26423 conditions, 4717 events. 2878/4717 cut-off events. For 124503/124506 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30631 event pairs, 530 based on Foata normal form. 1/4697 useless extension candidates. Maximal degree in co-relation 26328. Up to 4003 conditions per place. [2024-06-28 00:53:35,821 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 226 selfloop transitions, 67 changer transitions 0/306 dead transitions. [2024-06-28 00:53:35,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 306 transitions, 4163 flow [2024-06-28 00:53:35,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:53:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:53:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-06-28 00:53:35,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6172839506172839 [2024-06-28 00:53:35,823 INFO L175 Difference]: Start difference. First operand has 207 places, 258 transitions, 3114 flow. Second operand 9 states and 250 transitions. [2024-06-28 00:53:35,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 306 transitions, 4163 flow [2024-06-28 00:53:36,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 306 transitions, 4045 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-28 00:53:36,073 INFO L231 Difference]: Finished difference. Result has 214 places, 264 transitions, 3227 flow [2024-06-28 00:53:36,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3013, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3227, PETRI_PLACES=214, PETRI_TRANSITIONS=264} [2024-06-28 00:53:36,074 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 165 predicate places. [2024-06-28 00:53:36,074 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 264 transitions, 3227 flow [2024-06-28 00:53:36,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:36,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:36,074 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 00:53:36,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:53:36,074 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 00:53:36,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:36,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1605884946, now seen corresponding path program 1 times [2024-06-28 00:53:36,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:36,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411393453] [2024-06-28 00:53:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:36,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:36,201 INFO 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 00:53:36,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:36,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411393453] [2024-06-28 00:53:36,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411393453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:36,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:36,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:36,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33136222] [2024-06-28 00:53:36,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:36,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:36,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:36,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:36,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:36,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:36,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 264 transitions, 3227 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:36,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:36,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:36,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:36,839 INFO L124 PetriNetUnfolderBase]: 2889/4704 cut-off events. [2024-06-28 00:53:36,839 INFO L125 PetriNetUnfolderBase]: For 126548/126551 co-relation queries the response was YES. [2024-06-28 00:53:36,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26605 conditions, 4704 events. 2889/4704 cut-off events. For 126548/126551 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30293 event pairs, 531 based on Foata normal form. 1/4690 useless extension candidates. Maximal degree in co-relation 26509. Up to 4054 conditions per place. [2024-06-28 00:53:36,886 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 228 selfloop transitions, 58 changer transitions 0/299 dead transitions. [2024-06-28 00:53:36,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 299 transitions, 4109 flow [2024-06-28 00:53:36,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-28 00:53:36,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6317460317460317 [2024-06-28 00:53:36,888 INFO L175 Difference]: Start difference. First operand has 214 places, 264 transitions, 3227 flow. Second operand 7 states and 199 transitions. [2024-06-28 00:53:36,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 299 transitions, 4109 flow [2024-06-28 00:53:37,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 299 transitions, 3984 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:37,155 INFO L231 Difference]: Finished difference. Result has 216 places, 267 transitions, 3272 flow [2024-06-28 00:53:37,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3108, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3272, PETRI_PLACES=216, PETRI_TRANSITIONS=267} [2024-06-28 00:53:37,156 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 167 predicate places. [2024-06-28 00:53:37,156 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 267 transitions, 3272 flow [2024-06-28 00:53:37,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:37,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:37,156 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 00:53:37,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:53:37,157 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 00:53:37,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:37,157 INFO L85 PathProgramCache]: Analyzing trace with hash 762587388, now seen corresponding path program 5 times [2024-06-28 00:53:37,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:37,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890543792] [2024-06-28 00:53:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:37,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:37,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:37,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890543792] [2024-06-28 00:53:37,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890543792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:37,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:37,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:37,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392990449] [2024-06-28 00:53:37,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:37,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:37,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:37,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:37,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:37,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:37,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 267 transitions, 3272 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:37,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:37,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:37,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:37,955 INFO L124 PetriNetUnfolderBase]: 2942/4796 cut-off events. [2024-06-28 00:53:37,955 INFO L125 PetriNetUnfolderBase]: For 135177/135180 co-relation queries the response was YES. [2024-06-28 00:53:37,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27243 conditions, 4796 events. 2942/4796 cut-off events. For 135177/135180 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31030 event pairs, 553 based on Foata normal form. 1/4773 useless extension candidates. Maximal degree in co-relation 27146. Up to 3793 conditions per place. [2024-06-28 00:53:37,998 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 186 selfloop transitions, 109 changer transitions 0/308 dead transitions. [2024-06-28 00:53:37,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 308 transitions, 4436 flow [2024-06-28 00:53:37,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-28 00:53:37,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-28 00:53:37,999 INFO L175 Difference]: Start difference. First operand has 216 places, 267 transitions, 3272 flow. Second operand 7 states and 204 transitions. [2024-06-28 00:53:37,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 308 transitions, 4436 flow [2024-06-28 00:53:38,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 308 transitions, 4318 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:38,343 INFO L231 Difference]: Finished difference. Result has 219 places, 277 transitions, 3498 flow [2024-06-28 00:53:38,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3154, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3498, PETRI_PLACES=219, PETRI_TRANSITIONS=277} [2024-06-28 00:53:38,344 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 170 predicate places. [2024-06-28 00:53:38,344 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 277 transitions, 3498 flow [2024-06-28 00:53:38,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:38,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:38,345 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 00:53:38,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:53:38,345 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 00:53:38,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:38,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1155761342, now seen corresponding path program 2 times [2024-06-28 00:53:38,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:38,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503374759] [2024-06-28 00:53:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:38,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:38,459 INFO 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 00:53:38,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:38,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503374759] [2024-06-28 00:53:38,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503374759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:38,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:38,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:38,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200374678] [2024-06-28 00:53:38,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:38,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:38,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:38,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:38,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:38,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:38,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 277 transitions, 3498 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:38,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:38,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:38,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:39,104 INFO L124 PetriNetUnfolderBase]: 2953/4830 cut-off events. [2024-06-28 00:53:39,104 INFO L125 PetriNetUnfolderBase]: For 143745/143748 co-relation queries the response was YES. [2024-06-28 00:53:39,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27759 conditions, 4830 events. 2953/4830 cut-off events. For 143745/143748 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31430 event pairs, 527 based on Foata normal form. 1/4810 useless extension candidates. Maximal degree in co-relation 27661. Up to 4138 conditions per place. [2024-06-28 00:53:39,157 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 238 selfloop transitions, 61 changer transitions 0/312 dead transitions. [2024-06-28 00:53:39,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 312 transitions, 4410 flow [2024-06-28 00:53:39,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:53:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:53:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-28 00:53:39,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-28 00:53:39,158 INFO L175 Difference]: Start difference. First operand has 219 places, 277 transitions, 3498 flow. Second operand 8 states and 220 transitions. [2024-06-28 00:53:39,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 312 transitions, 4410 flow [2024-06-28 00:53:39,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 312 transitions, 4224 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 00:53:39,509 INFO L231 Difference]: Finished difference. Result has 224 places, 280 transitions, 3486 flow [2024-06-28 00:53:39,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3316, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3486, PETRI_PLACES=224, PETRI_TRANSITIONS=280} [2024-06-28 00:53:39,509 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 175 predicate places. [2024-06-28 00:53:39,510 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 280 transitions, 3486 flow [2024-06-28 00:53:39,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:39,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:39,510 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 00:53:39,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:53:39,510 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 00:53:39,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:39,511 INFO L85 PathProgramCache]: Analyzing trace with hash 762707358, now seen corresponding path program 6 times [2024-06-28 00:53:39,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:39,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717446783] [2024-06-28 00:53:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:39,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:39,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:39,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717446783] [2024-06-28 00:53:39,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717446783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:39,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:39,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:39,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748529301] [2024-06-28 00:53:39,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:39,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:39,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:39,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:39,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:39,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:39,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 280 transitions, 3486 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:39,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:39,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:39,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:40,279 INFO L124 PetriNetUnfolderBase]: 2950/4832 cut-off events. [2024-06-28 00:53:40,279 INFO L125 PetriNetUnfolderBase]: For 147771/147774 co-relation queries the response was YES. [2024-06-28 00:53:40,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27515 conditions, 4832 events. 2950/4832 cut-off events. For 147771/147774 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31492 event pairs, 530 based on Foata normal form. 1/4809 useless extension candidates. Maximal degree in co-relation 27416. Up to 4127 conditions per place. [2024-06-28 00:53:40,329 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 232 selfloop transitions, 64 changer transitions 0/309 dead transitions. [2024-06-28 00:53:40,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 309 transitions, 4344 flow [2024-06-28 00:53:40,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-28 00:53:40,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6253968253968254 [2024-06-28 00:53:40,330 INFO L175 Difference]: Start difference. First operand has 224 places, 280 transitions, 3486 flow. Second operand 7 states and 197 transitions. [2024-06-28 00:53:40,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 309 transitions, 4344 flow [2024-06-28 00:53:40,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 309 transitions, 4212 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:40,787 INFO L231 Difference]: Finished difference. Result has 227 places, 280 transitions, 3488 flow [2024-06-28 00:53:40,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3354, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3488, PETRI_PLACES=227, PETRI_TRANSITIONS=280} [2024-06-28 00:53:40,788 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 178 predicate places. [2024-06-28 00:53:40,788 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 280 transitions, 3488 flow [2024-06-28 00:53:40,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:40,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:40,789 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 00:53:40,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:53:40,789 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 00:53:40,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:40,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1765643866, now seen corresponding path program 1 times [2024-06-28 00:53:40,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:40,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740384612] [2024-06-28 00:53:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:40,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:40,909 INFO 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 00:53:40,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:40,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740384612] [2024-06-28 00:53:40,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740384612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:40,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:40,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:40,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157211333] [2024-06-28 00:53:40,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:40,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:40,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:40,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:40,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:40,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:53:40,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 280 transitions, 3488 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 00:53:40,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:40,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:53:40,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:41,588 INFO L124 PetriNetUnfolderBase]: 2959/4846 cut-off events. [2024-06-28 00:53:41,588 INFO L125 PetriNetUnfolderBase]: For 165885/165885 co-relation queries the response was YES. [2024-06-28 00:53:41,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27672 conditions, 4846 events. 2959/4846 cut-off events. For 165885/165885 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31805 event pairs, 563 based on Foata normal form. 12/4812 useless extension candidates. Maximal degree in co-relation 27572. Up to 3794 conditions per place. [2024-06-28 00:53:41,634 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 180 selfloop transitions, 97 changer transitions 0/315 dead transitions. [2024-06-28 00:53:41,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 315 transitions, 4370 flow [2024-06-28 00:53:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-28 00:53:41,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2024-06-28 00:53:41,635 INFO L175 Difference]: Start difference. First operand has 227 places, 280 transitions, 3488 flow. Second operand 7 states and 206 transitions. [2024-06-28 00:53:41,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 315 transitions, 4370 flow [2024-06-28 00:53:42,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 315 transitions, 4236 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:42,023 INFO L231 Difference]: Finished difference. Result has 229 places, 282 transitions, 3591 flow [2024-06-28 00:53:42,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3354, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3591, PETRI_PLACES=229, PETRI_TRANSITIONS=282} [2024-06-28 00:53:42,024 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 180 predicate places. [2024-06-28 00:53:42,024 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 282 transitions, 3591 flow [2024-06-28 00:53:42,024 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 00:53:42,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:42,024 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 00:53:42,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:53:42,024 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 00:53:42,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:42,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1387706354, now seen corresponding path program 4 times [2024-06-28 00:53:42,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:42,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125196102] [2024-06-28 00:53:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:42,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:42,134 INFO 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 00:53:42,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:42,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125196102] [2024-06-28 00:53:42,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125196102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:42,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:42,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:42,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473597504] [2024-06-28 00:53:42,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:42,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:42,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:42,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:42,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:42,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 282 transitions, 3591 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:42,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:42,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:42,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:42,821 INFO L124 PetriNetUnfolderBase]: 3109/5014 cut-off events. [2024-06-28 00:53:42,821 INFO L125 PetriNetUnfolderBase]: For 165843/165843 co-relation queries the response was YES. [2024-06-28 00:53:42,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28993 conditions, 5014 events. 3109/5014 cut-off events. For 165843/165843 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 32397 event pairs, 388 based on Foata normal form. 10/5020 useless extension candidates. Maximal degree in co-relation 28892. Up to 4414 conditions per place. [2024-06-28 00:53:42,873 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 276 selfloop transitions, 31 changer transitions 0/320 dead transitions. [2024-06-28 00:53:42,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 320 transitions, 4323 flow [2024-06-28 00:53:42,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-28 00:53:42,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674074074074074 [2024-06-28 00:53:42,875 INFO L175 Difference]: Start difference. First operand has 229 places, 282 transitions, 3591 flow. Second operand 6 states and 182 transitions. [2024-06-28 00:53:42,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 320 transitions, 4323 flow [2024-06-28 00:53:43,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 320 transitions, 4122 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:43,449 INFO L231 Difference]: Finished difference. Result has 230 places, 283 transitions, 3475 flow [2024-06-28 00:53:43,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3475, PETRI_PLACES=230, PETRI_TRANSITIONS=283} [2024-06-28 00:53:43,449 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 181 predicate places. [2024-06-28 00:53:43,450 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 283 transitions, 3475 flow [2024-06-28 00:53:43,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:43,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:43,450 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 00:53:43,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:53:43,450 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 00:53:43,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:43,450 INFO L85 PathProgramCache]: Analyzing trace with hash -351025240, now seen corresponding path program 3 times [2024-06-28 00:53:43,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:43,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461001063] [2024-06-28 00:53:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:43,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:43,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:43,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461001063] [2024-06-28 00:53:43,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461001063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:43,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:43,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:43,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837130330] [2024-06-28 00:53:43,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:43,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:43,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:43,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:43,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:43,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:43,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 283 transitions, 3475 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:43,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:43,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:43,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:44,198 INFO L124 PetriNetUnfolderBase]: 3106/5062 cut-off events. [2024-06-28 00:53:44,199 INFO L125 PetriNetUnfolderBase]: For 161059/161074 co-relation queries the response was YES. [2024-06-28 00:53:44,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28667 conditions, 5062 events. 3106/5062 cut-off events. For 161059/161074 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33244 event pairs, 573 based on Foata normal form. 11/5043 useless extension candidates. Maximal degree in co-relation 28565. Up to 4368 conditions per place. [2024-06-28 00:53:44,256 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 236 selfloop transitions, 56 changer transitions 0/305 dead transitions. [2024-06-28 00:53:44,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 305 transitions, 4215 flow [2024-06-28 00:53:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-28 00:53:44,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 00:53:44,257 INFO L175 Difference]: Start difference. First operand has 230 places, 283 transitions, 3475 flow. Second operand 6 states and 168 transitions. [2024-06-28 00:53:44,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 305 transitions, 4215 flow [2024-06-28 00:53:44,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 305 transitions, 4152 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:44,652 INFO L231 Difference]: Finished difference. Result has 232 places, 283 transitions, 3530 flow [2024-06-28 00:53:44,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3530, PETRI_PLACES=232, PETRI_TRANSITIONS=283} [2024-06-28 00:53:44,653 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 183 predicate places. [2024-06-28 00:53:44,653 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 283 transitions, 3530 flow [2024-06-28 00:53:44,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:44,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:44,653 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 00:53:44,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:53:44,654 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 00:53:44,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:44,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1356247342, now seen corresponding path program 7 times [2024-06-28 00:53:44,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:44,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098032902] [2024-06-28 00:53:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:44,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:44,758 INFO 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 00:53:44,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:44,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098032902] [2024-06-28 00:53:44,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098032902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:44,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:44,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:44,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437043104] [2024-06-28 00:53:44,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:44,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:44,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:44,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:44,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:44,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:44,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 283 transitions, 3530 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:44,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:44,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:44,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:45,541 INFO L124 PetriNetUnfolderBase]: 3114/5074 cut-off events. [2024-06-28 00:53:45,541 INFO L125 PetriNetUnfolderBase]: For 165963/165966 co-relation queries the response was YES. [2024-06-28 00:53:45,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28885 conditions, 5074 events. 3114/5074 cut-off events. For 165963/165966 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33279 event pairs, 555 based on Foata normal form. 2/5054 useless extension candidates. Maximal degree in co-relation 28782. Up to 4124 conditions per place. [2024-06-28 00:53:45,600 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 205 selfloop transitions, 107 changer transitions 0/325 dead transitions. [2024-06-28 00:53:45,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 325 transitions, 4606 flow [2024-06-28 00:53:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-28 00:53:45,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6698412698412698 [2024-06-28 00:53:45,602 INFO L175 Difference]: Start difference. First operand has 232 places, 283 transitions, 3530 flow. Second operand 7 states and 211 transitions. [2024-06-28 00:53:45,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 325 transitions, 4606 flow [2024-06-28 00:53:46,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 325 transitions, 4472 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:46,182 INFO L231 Difference]: Finished difference. Result has 236 places, 286 transitions, 3689 flow [2024-06-28 00:53:46,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3396, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3689, PETRI_PLACES=236, PETRI_TRANSITIONS=286} [2024-06-28 00:53:46,183 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 187 predicate places. [2024-06-28 00:53:46,183 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 286 transitions, 3689 flow [2024-06-28 00:53:46,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:46,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:46,184 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 00:53:46,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:53:46,184 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 00:53:46,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:46,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1578454736, now seen corresponding path program 4 times [2024-06-28 00:53:46,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:46,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392952689] [2024-06-28 00:53:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:46,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:46,294 INFO 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 00:53:46,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:46,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392952689] [2024-06-28 00:53:46,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392952689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:46,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:46,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:46,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360887472] [2024-06-28 00:53:46,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:46,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:46,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:46,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:46,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:46,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 286 transitions, 3689 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:46,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:46,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:46,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:47,059 INFO L124 PetriNetUnfolderBase]: 3111/5040 cut-off events. [2024-06-28 00:53:47,060 INFO L125 PetriNetUnfolderBase]: For 165888/165891 co-relation queries the response was YES. [2024-06-28 00:53:47,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29218 conditions, 5040 events. 3111/5040 cut-off events. For 165888/165891 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32784 event pairs, 543 based on Foata normal form. 1/5027 useless extension candidates. Maximal degree in co-relation 29113. Up to 4376 conditions per place. [2024-06-28 00:53:47,117 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 237 selfloop transitions, 60 changer transitions 0/310 dead transitions. [2024-06-28 00:53:47,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 310 transitions, 4339 flow [2024-06-28 00:53:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-28 00:53:47,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-06-28 00:53:47,118 INFO L175 Difference]: Start difference. First operand has 236 places, 286 transitions, 3689 flow. Second operand 6 states and 172 transitions. [2024-06-28 00:53:47,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 310 transitions, 4339 flow [2024-06-28 00:53:47,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 310 transitions, 4110 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 00:53:47,501 INFO L231 Difference]: Finished difference. Result has 236 places, 286 transitions, 3594 flow [2024-06-28 00:53:47,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3594, PETRI_PLACES=236, PETRI_TRANSITIONS=286} [2024-06-28 00:53:47,501 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 187 predicate places. [2024-06-28 00:53:47,501 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 286 transitions, 3594 flow [2024-06-28 00:53:47,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:47,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:47,502 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 00:53:47,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:53:47,502 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 00:53:47,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:47,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1239736256, now seen corresponding path program 8 times [2024-06-28 00:53:47,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:47,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2887647] [2024-06-28 00:53:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:47,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:47,603 INFO 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 00:53:47,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:47,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2887647] [2024-06-28 00:53:47,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2887647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:47,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:47,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:47,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833714425] [2024-06-28 00:53:47,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:47,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:47,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:47,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:47,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:47,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:47,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 286 transitions, 3594 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:47,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:47,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:47,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:48,276 INFO L124 PetriNetUnfolderBase]: 3105/5041 cut-off events. [2024-06-28 00:53:48,276 INFO L125 PetriNetUnfolderBase]: For 158611/158614 co-relation queries the response was YES. [2024-06-28 00:53:48,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28761 conditions, 5041 events. 3105/5041 cut-off events. For 158611/158614 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 32878 event pairs, 552 based on Foata normal form. 2/5028 useless extension candidates. Maximal degree in co-relation 28656. Up to 4117 conditions per place. [2024-06-28 00:53:48,327 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 207 selfloop transitions, 110 changer transitions 0/330 dead transitions. [2024-06-28 00:53:48,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 330 transitions, 4546 flow [2024-06-28 00:53:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:53:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:53:48,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-06-28 00:53:48,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-06-28 00:53:48,329 INFO L175 Difference]: Start difference. First operand has 236 places, 286 transitions, 3594 flow. Second operand 9 states and 260 transitions. [2024-06-28 00:53:48,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 330 transitions, 4546 flow [2024-06-28 00:53:48,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 330 transitions, 4396 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 00:53:48,795 INFO L231 Difference]: Finished difference. Result has 238 places, 286 transitions, 3691 flow [2024-06-28 00:53:48,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3452, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3691, PETRI_PLACES=238, PETRI_TRANSITIONS=286} [2024-06-28 00:53:48,795 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 189 predicate places. [2024-06-28 00:53:48,796 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 286 transitions, 3691 flow [2024-06-28 00:53:48,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:48,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:48,796 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 00:53:48,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:53:48,796 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 00:53:48,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:48,796 INFO L85 PathProgramCache]: Analyzing trace with hash -535131056, now seen corresponding path program 9 times [2024-06-28 00:53:48,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:48,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416397297] [2024-06-28 00:53:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:48,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:48,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:48,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416397297] [2024-06-28 00:53:48,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416397297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:48,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:48,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:48,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269647604] [2024-06-28 00:53:48,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:48,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:48,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:48,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:48,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:48,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:48,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 286 transitions, 3691 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:48,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:48,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:48,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:49,712 INFO L124 PetriNetUnfolderBase]: 3247/5303 cut-off events. [2024-06-28 00:53:49,712 INFO L125 PetriNetUnfolderBase]: For 163324/163327 co-relation queries the response was YES. [2024-06-28 00:53:49,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30538 conditions, 5303 events. 3247/5303 cut-off events. For 163324/163327 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 35159 event pairs, 525 based on Foata normal form. 6/5294 useless extension candidates. Maximal degree in co-relation 30434. Up to 4482 conditions per place. [2024-06-28 00:53:49,760 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 263 selfloop transitions, 75 changer transitions 0/351 dead transitions. [2024-06-28 00:53:49,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 351 transitions, 5016 flow [2024-06-28 00:53:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:49,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-28 00:53:49,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6962962962962963 [2024-06-28 00:53:49,762 INFO L175 Difference]: Start difference. First operand has 238 places, 286 transitions, 3691 flow. Second operand 6 states and 188 transitions. [2024-06-28 00:53:49,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 351 transitions, 5016 flow [2024-06-28 00:53:50,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 351 transitions, 4725 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-28 00:53:50,185 INFO L231 Difference]: Finished difference. Result has 235 places, 314 transitions, 4097 flow [2024-06-28 00:53:50,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4097, PETRI_PLACES=235, PETRI_TRANSITIONS=314} [2024-06-28 00:53:50,186 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 186 predicate places. [2024-06-28 00:53:50,186 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 314 transitions, 4097 flow [2024-06-28 00:53:50,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:50,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:50,186 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 00:53:50,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:53:50,186 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 00:53:50,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1387583408, now seen corresponding path program 10 times [2024-06-28 00:53:50,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:50,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634256304] [2024-06-28 00:53:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:50,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:50,313 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 00:53:50,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:50,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634256304] [2024-06-28 00:53:50,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634256304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:50,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:50,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:50,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696830217] [2024-06-28 00:53:50,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:50,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:50,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:50,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:50,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:50,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:50,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 314 transitions, 4097 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:50,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:50,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:50,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:51,062 INFO L124 PetriNetUnfolderBase]: 3255/5314 cut-off events. [2024-06-28 00:53:51,063 INFO L125 PetriNetUnfolderBase]: For 153428/153434 co-relation queries the response was YES. [2024-06-28 00:53:51,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31147 conditions, 5314 events. 3255/5314 cut-off events. For 153428/153434 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 35148 event pairs, 525 based on Foata normal form. 6/5300 useless extension candidates. Maximal degree in co-relation 31043. Up to 4549 conditions per place. [2024-06-28 00:53:51,125 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 271 selfloop transitions, 69 changer transitions 0/353 dead transitions. [2024-06-28 00:53:51,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 353 transitions, 4913 flow [2024-06-28 00:53:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-28 00:53:51,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-28 00:53:51,126 INFO L175 Difference]: Start difference. First operand has 235 places, 314 transitions, 4097 flow. Second operand 7 states and 209 transitions. [2024-06-28 00:53:51,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 353 transitions, 4913 flow [2024-06-28 00:53:51,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 353 transitions, 4837 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-28 00:53:51,563 INFO L231 Difference]: Finished difference. Result has 240 places, 317 transitions, 4229 flow [2024-06-28 00:53:51,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4021, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4229, PETRI_PLACES=240, PETRI_TRANSITIONS=317} [2024-06-28 00:53:51,563 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 191 predicate places. [2024-06-28 00:53:51,563 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 317 transitions, 4229 flow [2024-06-28 00:53:51,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:51,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:51,564 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 00:53:51,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:53:51,564 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 00:53:51,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:51,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1387703378, now seen corresponding path program 11 times [2024-06-28 00:53:51,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:51,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685778060] [2024-06-28 00:53:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:51,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:51,657 INFO 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 00:53:51,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:51,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685778060] [2024-06-28 00:53:51,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685778060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:51,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:51,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:51,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364722236] [2024-06-28 00:53:51,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:51,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:51,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:51,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:51,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:51,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:51,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 317 transitions, 4229 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:51,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:51,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:51,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:52,431 INFO L124 PetriNetUnfolderBase]: 3305/5723 cut-off events. [2024-06-28 00:53:52,432 INFO L125 PetriNetUnfolderBase]: For 164853/164859 co-relation queries the response was YES. [2024-06-28 00:53:52,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32781 conditions, 5723 events. 3305/5723 cut-off events. For 164853/164859 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 39592 event pairs, 706 based on Foata normal form. 6/5713 useless extension candidates. Maximal degree in co-relation 32676. Up to 4378 conditions per place. [2024-06-28 00:53:52,496 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 233 selfloop transitions, 123 changer transitions 0/369 dead transitions. [2024-06-28 00:53:52,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 369 transitions, 5317 flow [2024-06-28 00:53:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-28 00:53:52,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-06-28 00:53:52,497 INFO L175 Difference]: Start difference. First operand has 240 places, 317 transitions, 4229 flow. Second operand 7 states and 216 transitions. [2024-06-28 00:53:52,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 369 transitions, 5317 flow [2024-06-28 00:53:52,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 369 transitions, 5078 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 00:53:52,946 INFO L231 Difference]: Finished difference. Result has 242 places, 329 transitions, 4509 flow [2024-06-28 00:53:52,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=3990, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4509, PETRI_PLACES=242, PETRI_TRANSITIONS=329} [2024-06-28 00:53:52,947 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 193 predicate places. [2024-06-28 00:53:52,947 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 329 transitions, 4509 flow [2024-06-28 00:53:52,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:52,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:52,948 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 00:53:52,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:53:52,948 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 00:53:52,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:52,948 INFO L85 PathProgramCache]: Analyzing trace with hash 329222810, now seen corresponding path program 2 times [2024-06-28 00:53:52,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:52,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457113392] [2024-06-28 00:53:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:52,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:53,054 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 00:53:53,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:53,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457113392] [2024-06-28 00:53:53,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457113392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:53,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:53,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:53,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982788252] [2024-06-28 00:53:53,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:53,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:53,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:53,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:53,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:53,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:53:53,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 329 transitions, 4509 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 00:53:53,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:53,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:53:53,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:53,824 INFO L124 PetriNetUnfolderBase]: 3284/5399 cut-off events. [2024-06-28 00:53:53,824 INFO L125 PetriNetUnfolderBase]: For 188550/188568 co-relation queries the response was YES. [2024-06-28 00:53:53,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33464 conditions, 5399 events. 3284/5399 cut-off events. For 188550/188568 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36308 event pairs, 521 based on Foata normal form. 30/5389 useless extension candidates. Maximal degree in co-relation 33358. Up to 4386 conditions per place. [2024-06-28 00:53:53,887 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 255 selfloop transitions, 73 changer transitions 0/367 dead transitions. [2024-06-28 00:53:53,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 367 transitions, 5529 flow [2024-06-28 00:53:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:53:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:53:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-28 00:53:53,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6634920634920635 [2024-06-28 00:53:53,888 INFO L175 Difference]: Start difference. First operand has 242 places, 329 transitions, 4509 flow. Second operand 7 states and 209 transitions. [2024-06-28 00:53:53,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 367 transitions, 5529 flow [2024-06-28 00:53:54,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 367 transitions, 5372 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:54,455 INFO L231 Difference]: Finished difference. Result has 245 places, 331 transitions, 4555 flow [2024-06-28 00:53:54,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4356, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4555, PETRI_PLACES=245, PETRI_TRANSITIONS=331} [2024-06-28 00:53:54,455 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 196 predicate places. [2024-06-28 00:53:54,455 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 331 transitions, 4555 flow [2024-06-28 00:53:54,455 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 00:53:54,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:54,456 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 00:53:54,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:53:54,456 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 00:53:54,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:54,456 INFO L85 PathProgramCache]: Analyzing trace with hash -987839648, now seen corresponding path program 3 times [2024-06-28 00:53:54,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:54,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260882125] [2024-06-28 00:53:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:54,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:54,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:54,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260882125] [2024-06-28 00:53:54,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260882125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:54,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:54,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:54,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820378279] [2024-06-28 00:53:54,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:54,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:54,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:54,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:54,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:54,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:53:54,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 331 transitions, 4555 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 00:53:54,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:54,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:53:54,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:55,393 INFO L124 PetriNetUnfolderBase]: 3394/5517 cut-off events. [2024-06-28 00:53:55,393 INFO L125 PetriNetUnfolderBase]: For 190535/190535 co-relation queries the response was YES. [2024-06-28 00:53:55,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34905 conditions, 5517 events. 3394/5517 cut-off events. For 190535/190535 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 36940 event pairs, 529 based on Foata normal form. 14/5502 useless extension candidates. Maximal degree in co-relation 34798. Up to 4567 conditions per place. [2024-06-28 00:53:55,461 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 267 selfloop transitions, 62 changer transitions 0/368 dead transitions. [2024-06-28 00:53:55,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 368 transitions, 5377 flow [2024-06-28 00:53:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-28 00:53:55,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6925925925925925 [2024-06-28 00:53:55,462 INFO L175 Difference]: Start difference. First operand has 245 places, 331 transitions, 4555 flow. Second operand 6 states and 187 transitions. [2024-06-28 00:53:55,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 368 transitions, 5377 flow [2024-06-28 00:53:55,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 368 transitions, 5216 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 00:53:55,904 INFO L231 Difference]: Finished difference. Result has 246 places, 334 transitions, 4593 flow [2024-06-28 00:53:55,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4593, PETRI_PLACES=246, PETRI_TRANSITIONS=334} [2024-06-28 00:53:55,904 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 197 predicate places. [2024-06-28 00:53:55,904 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 334 transitions, 4593 flow [2024-06-28 00:53:55,904 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 00:53:55,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:55,905 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 00:53:55,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:53:55,905 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 00:53:55,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:55,905 INFO L85 PathProgramCache]: Analyzing trace with hash -973554848, now seen corresponding path program 4 times [2024-06-28 00:53:55,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:55,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110423166] [2024-06-28 00:53:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:55,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:53:56,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:56,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110423166] [2024-06-28 00:53:56,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110423166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:56,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:56,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:56,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216386988] [2024-06-28 00:53:56,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:56,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:56,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:56,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:56,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:56,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 45 [2024-06-28 00:53:56,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 334 transitions, 4593 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 00:53:56,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:56,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 45 [2024-06-28 00:53:56,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:56,891 INFO L124 PetriNetUnfolderBase]: 3689/5965 cut-off events. [2024-06-28 00:53:56,891 INFO L125 PetriNetUnfolderBase]: For 222320/222320 co-relation queries the response was YES. [2024-06-28 00:53:56,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38386 conditions, 5965 events. 3689/5965 cut-off events. For 222320/222320 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 40182 event pairs, 450 based on Foata normal form. 14/5948 useless extension candidates. Maximal degree in co-relation 38278. Up to 4469 conditions per place. [2024-06-28 00:53:56,960 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 276 selfloop transitions, 64 changer transitions 0/379 dead transitions. [2024-06-28 00:53:56,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 379 transitions, 5631 flow [2024-06-28 00:53:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-28 00:53:56,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-06-28 00:53:56,962 INFO L175 Difference]: Start difference. First operand has 246 places, 334 transitions, 4593 flow. Second operand 6 states and 192 transitions. [2024-06-28 00:53:56,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 379 transitions, 5631 flow [2024-06-28 00:53:57,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 379 transitions, 5496 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 00:53:57,598 INFO L231 Difference]: Finished difference. Result has 249 places, 340 transitions, 4736 flow [2024-06-28 00:53:57,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4736, PETRI_PLACES=249, PETRI_TRANSITIONS=340} [2024-06-28 00:53:57,598 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 200 predicate places. [2024-06-28 00:53:57,598 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 340 transitions, 4736 flow [2024-06-28 00:53:57,599 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 00:53:57,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:57,599 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 00:53:57,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:53:57,599 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 00:53:57,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:57,599 INFO L85 PathProgramCache]: Analyzing trace with hash -353873272, now seen corresponding path program 1 times [2024-06-28 00:53:57,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:57,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418332659] [2024-06-28 00:53:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:57,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:57,709 INFO 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 00:53:57,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:57,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418332659] [2024-06-28 00:53:57,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418332659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:57,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:57,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:57,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984351173] [2024-06-28 00:53:57,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:57,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:57,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:57,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:57,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:57,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 340 transitions, 4736 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:57,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:57,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:57,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:53:58,728 INFO L124 PetriNetUnfolderBase]: 3877/6251 cut-off events. [2024-06-28 00:53:58,729 INFO L125 PetriNetUnfolderBase]: For 226083/226101 co-relation queries the response was YES. [2024-06-28 00:53:58,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40646 conditions, 6251 events. 3877/6251 cut-off events. For 226083/226101 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 42109 event pairs, 586 based on Foata normal form. 16/6233 useless extension candidates. Maximal degree in co-relation 40536. Up to 5299 conditions per place. [2024-06-28 00:53:58,793 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 292 selfloop transitions, 70 changer transitions 0/375 dead transitions. [2024-06-28 00:53:58,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 375 transitions, 5765 flow [2024-06-28 00:53:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:53:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:53:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-28 00:53:58,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6407407407407407 [2024-06-28 00:53:58,794 INFO L175 Difference]: Start difference. First operand has 249 places, 340 transitions, 4736 flow. Second operand 6 states and 173 transitions. [2024-06-28 00:53:58,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 375 transitions, 5765 flow [2024-06-28 00:53:59,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 375 transitions, 5676 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-28 00:53:59,387 INFO L231 Difference]: Finished difference. Result has 254 places, 348 transitions, 4953 flow [2024-06-28 00:53:59,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4953, PETRI_PLACES=254, PETRI_TRANSITIONS=348} [2024-06-28 00:53:59,387 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 205 predicate places. [2024-06-28 00:53:59,387 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 348 transitions, 4953 flow [2024-06-28 00:53:59,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:59,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:53:59,388 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 00:53:59,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:53:59,388 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 00:53:59,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:53:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash -480968952, now seen corresponding path program 2 times [2024-06-28 00:53:59,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:53:59,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466419944] [2024-06-28 00:53:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:53:59,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:53:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:53:59,496 INFO 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 00:53:59,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:53:59,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466419944] [2024-06-28 00:53:59,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466419944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:53:59,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:53:59,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:53:59,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012275925] [2024-06-28 00:53:59,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:53:59,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:53:59,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:53:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:53:59,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:53:59,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:53:59,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 348 transitions, 4953 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:53:59,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:53:59,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:53:59,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:00,390 INFO L124 PetriNetUnfolderBase]: 3890/6284 cut-off events. [2024-06-28 00:54:00,390 INFO L125 PetriNetUnfolderBase]: For 230357/230375 co-relation queries the response was YES. [2024-06-28 00:54:00,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41188 conditions, 6284 events. 3890/6284 cut-off events. For 230357/230375 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 42609 event pairs, 677 based on Foata normal form. 16/6264 useless extension candidates. Maximal degree in co-relation 41075. Up to 5469 conditions per place. [2024-06-28 00:54:00,471 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 296 selfloop transitions, 63 changer transitions 0/372 dead transitions. [2024-06-28 00:54:00,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 372 transitions, 5763 flow [2024-06-28 00:54:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:54:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:54:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-28 00:54:00,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 00:54:00,472 INFO L175 Difference]: Start difference. First operand has 254 places, 348 transitions, 4953 flow. Second operand 6 states and 168 transitions. [2024-06-28 00:54:00,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 372 transitions, 5763 flow [2024-06-28 00:54:01,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 372 transitions, 5607 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-28 00:54:01,215 INFO L231 Difference]: Finished difference. Result has 258 places, 350 transitions, 4975 flow [2024-06-28 00:54:01,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4975, PETRI_PLACES=258, PETRI_TRANSITIONS=350} [2024-06-28 00:54:01,215 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 209 predicate places. [2024-06-28 00:54:01,215 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 350 transitions, 4975 flow [2024-06-28 00:54:01,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:01,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:01,216 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 00:54:01,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 00:54:01,216 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 00:54:01,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:01,216 INFO L85 PathProgramCache]: Analyzing trace with hash -534884792, now seen corresponding path program 3 times [2024-06-28 00:54:01,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:01,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741084895] [2024-06-28 00:54:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:01,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:54:01,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:01,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741084895] [2024-06-28 00:54:01,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741084895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:01,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:01,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:54:01,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109541714] [2024-06-28 00:54:01,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:01,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:54:01,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:01,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:54:01,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:54:01,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:01,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 350 transitions, 4975 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:01,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:01,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:01,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:02,346 INFO L124 PetriNetUnfolderBase]: 3956/6597 cut-off events. [2024-06-28 00:54:02,346 INFO L125 PetriNetUnfolderBase]: For 249230/249236 co-relation queries the response was YES. [2024-06-28 00:54:02,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41496 conditions, 6597 events. 3956/6597 cut-off events. For 249230/249236 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 45921 event pairs, 763 based on Foata normal form. 24/6594 useless extension candidates. Maximal degree in co-relation 41381. Up to 5370 conditions per place. [2024-06-28 00:54:02,424 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 308 selfloop transitions, 65 changer transitions 0/386 dead transitions. [2024-06-28 00:54:02,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 386 transitions, 5868 flow [2024-06-28 00:54:02,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:54:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:54:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-28 00:54:02,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6814814814814815 [2024-06-28 00:54:02,425 INFO L175 Difference]: Start difference. First operand has 258 places, 350 transitions, 4975 flow. Second operand 6 states and 184 transitions. [2024-06-28 00:54:02,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 386 transitions, 5868 flow [2024-06-28 00:54:02,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 386 transitions, 5720 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 00:54:02,987 INFO L231 Difference]: Finished difference. Result has 260 places, 352 transitions, 5018 flow [2024-06-28 00:54:02,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4827, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5018, PETRI_PLACES=260, PETRI_TRANSITIONS=352} [2024-06-28 00:54:02,988 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 211 predicate places. [2024-06-28 00:54:02,988 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 352 transitions, 5018 flow [2024-06-28 00:54:02,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:02,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:02,988 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 00:54:02,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 00:54:02,989 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:54:02,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:02,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1220229186, now seen corresponding path program 1 times [2024-06-28 00:54:02,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:02,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694573838] [2024-06-28 00:54:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:02,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:03,163 INFO 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 00:54:03,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:03,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694573838] [2024-06-28 00:54:03,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694573838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:03,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:03,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:54:03,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564431249] [2024-06-28 00:54:03,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:03,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:54:03,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:03,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:54:03,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:54:03,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 45 [2024-06-28 00:54:03,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 352 transitions, 5018 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 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 00:54:03,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:03,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 45 [2024-06-28 00:54:03,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:04,701 INFO L124 PetriNetUnfolderBase]: 5742/10092 cut-off events. [2024-06-28 00:54:04,701 INFO L125 PetriNetUnfolderBase]: For 286433/287287 co-relation queries the response was YES. [2024-06-28 00:54:04,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59975 conditions, 10092 events. 5742/10092 cut-off events. For 286433/287287 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 81422 event pairs, 1176 based on Foata normal form. 468/10022 useless extension candidates. Maximal degree in co-relation 59859. Up to 3436 conditions per place. [2024-06-28 00:54:04,830 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 233 selfloop transitions, 271 changer transitions 83/756 dead transitions. [2024-06-28 00:54:04,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 756 transitions, 11561 flow [2024-06-28 00:54:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:54:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:54:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-28 00:54:04,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.707936507936508 [2024-06-28 00:54:04,831 INFO L175 Difference]: Start difference. First operand has 260 places, 352 transitions, 5018 flow. Second operand 7 states and 223 transitions. [2024-06-28 00:54:04,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 756 transitions, 11561 flow [2024-06-28 00:54:05,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 756 transitions, 11263 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 00:54:05,896 INFO L231 Difference]: Finished difference. Result has 268 places, 532 transitions, 8811 flow [2024-06-28 00:54:05,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4878, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8811, PETRI_PLACES=268, PETRI_TRANSITIONS=532} [2024-06-28 00:54:05,897 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 219 predicate places. [2024-06-28 00:54:05,897 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 532 transitions, 8811 flow [2024-06-28 00:54:05,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 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 00:54:05,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:05,898 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 00:54:05,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 00:54:05,898 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 00:54:05,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:05,898 INFO L85 PathProgramCache]: Analyzing trace with hash -403953882, now seen corresponding path program 1 times [2024-06-28 00:54:05,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:05,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113652958] [2024-06-28 00:54:05,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:05,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:06,052 INFO 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 00:54:06,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:06,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113652958] [2024-06-28 00:54:06,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113652958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:06,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:06,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:06,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774238461] [2024-06-28 00:54:06,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:06,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:06,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:06,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:06,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:06,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:06,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 532 transitions, 8811 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:06,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:06,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:06,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:08,488 INFO L124 PetriNetUnfolderBase]: 6977/11833 cut-off events. [2024-06-28 00:54:08,488 INFO L125 PetriNetUnfolderBase]: For 430533/430896 co-relation queries the response was YES. [2024-06-28 00:54:08,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80795 conditions, 11833 events. 6977/11833 cut-off events. For 430533/430896 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 90839 event pairs, 2229 based on Foata normal form. 191/11912 useless extension candidates. Maximal degree in co-relation 80673. Up to 9653 conditions per place. [2024-06-28 00:54:08,619 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 349 selfloop transitions, 62 changer transitions 169/594 dead transitions. [2024-06-28 00:54:08,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 594 transitions, 10411 flow [2024-06-28 00:54:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-28 00:54:08,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-28 00:54:08,621 INFO L175 Difference]: Start difference. First operand has 268 places, 532 transitions, 8811 flow. Second operand 8 states and 230 transitions. [2024-06-28 00:54:08,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 594 transitions, 10411 flow [2024-06-28 00:54:09,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 594 transitions, 10387 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-06-28 00:54:09,992 INFO L231 Difference]: Finished difference. Result has 276 places, 378 transitions, 6010 flow [2024-06-28 00:54:09,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8803, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6010, PETRI_PLACES=276, PETRI_TRANSITIONS=378} [2024-06-28 00:54:09,993 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 227 predicate places. [2024-06-28 00:54:09,993 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 378 transitions, 6010 flow [2024-06-28 00:54:09,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:09,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:09,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:54:09,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 00:54:09,993 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 00:54:09,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:09,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1361022820, now seen corresponding path program 2 times [2024-06-28 00:54:09,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:09,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084653458] [2024-06-28 00:54:09,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:09,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:10,131 INFO 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 00:54:10,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:10,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084653458] [2024-06-28 00:54:10,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084653458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:10,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:10,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:10,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587119988] [2024-06-28 00:54:10,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:10,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:10,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:10,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:10,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:10,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:10,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 378 transitions, 6010 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:10,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:10,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:10,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:11,676 INFO L124 PetriNetUnfolderBase]: 5552/9407 cut-off events. [2024-06-28 00:54:11,676 INFO L125 PetriNetUnfolderBase]: For 419792/420170 co-relation queries the response was YES. [2024-06-28 00:54:11,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66871 conditions, 9407 events. 5552/9407 cut-off events. For 419792/420170 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 69369 event pairs, 1446 based on Foata normal form. 269/9553 useless extension candidates. Maximal degree in co-relation 66746. Up to 7941 conditions per place. [2024-06-28 00:54:11,802 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 351 selfloop transitions, 58 changer transitions 0/423 dead transitions. [2024-06-28 00:54:11,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 423 transitions, 7146 flow [2024-06-28 00:54:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-06-28 00:54:11,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277777777777778 [2024-06-28 00:54:11,803 INFO L175 Difference]: Start difference. First operand has 276 places, 378 transitions, 6010 flow. Second operand 8 states and 226 transitions. [2024-06-28 00:54:11,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 423 transitions, 7146 flow [2024-06-28 00:54:12,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 423 transitions, 7072 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 00:54:12,860 INFO L231 Difference]: Finished difference. Result has 278 places, 380 transitions, 6094 flow [2024-06-28 00:54:12,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5936, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6094, PETRI_PLACES=278, PETRI_TRANSITIONS=380} [2024-06-28 00:54:12,861 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 229 predicate places. [2024-06-28 00:54:12,861 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 380 transitions, 6094 flow [2024-06-28 00:54:12,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:12,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:12,861 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 00:54:12,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 00:54:12,861 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 00:54:12,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:12,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1862035222, now seen corresponding path program 3 times [2024-06-28 00:54:12,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:12,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581860141] [2024-06-28 00:54:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:12,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:54:13,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:13,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581860141] [2024-06-28 00:54:13,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581860141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:13,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:13,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:13,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634572581] [2024-06-28 00:54:13,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:13,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:13,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:13,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:13,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:13,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 380 transitions, 6094 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:13,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:13,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:13,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:14,677 INFO L124 PetriNetUnfolderBase]: 5546/9246 cut-off events. [2024-06-28 00:54:14,677 INFO L125 PetriNetUnfolderBase]: For 419746/420124 co-relation queries the response was YES. [2024-06-28 00:54:14,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66503 conditions, 9246 events. 5546/9246 cut-off events. For 419746/420124 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 66821 event pairs, 1368 based on Foata normal form. 271/9391 useless extension candidates. Maximal degree in co-relation 66376. Up to 8033 conditions per place. [2024-06-28 00:54:14,802 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 349 selfloop transitions, 56 changer transitions 0/419 dead transitions. [2024-06-28 00:54:14,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 419 transitions, 7046 flow [2024-06-28 00:54:14,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:14,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-28 00:54:14,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-28 00:54:14,803 INFO L175 Difference]: Start difference. First operand has 278 places, 380 transitions, 6094 flow. Second operand 8 states and 222 transitions. [2024-06-28 00:54:14,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 419 transitions, 7046 flow [2024-06-28 00:54:16,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 419 transitions, 6967 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 00:54:16,023 INFO L231 Difference]: Finished difference. Result has 282 places, 380 transitions, 6132 flow [2024-06-28 00:54:16,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6015, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6132, PETRI_PLACES=282, PETRI_TRANSITIONS=380} [2024-06-28 00:54:16,023 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 233 predicate places. [2024-06-28 00:54:16,024 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 380 transitions, 6132 flow [2024-06-28 00:54:16,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:16,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:16,024 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 00:54:16,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 00:54:16,024 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 00:54:16,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:16,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1183863400, now seen corresponding path program 1 times [2024-06-28 00:54:16,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:16,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969474107] [2024-06-28 00:54:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:16,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:16,133 INFO 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 00:54:16,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:16,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969474107] [2024-06-28 00:54:16,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969474107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:16,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:16,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:54:16,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563403516] [2024-06-28 00:54:16,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:16,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:54:16,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:16,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:54:16,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:54:16,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:16,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 380 transitions, 6132 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:16,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:16,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:16,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:17,810 INFO L124 PetriNetUnfolderBase]: 5600/9250 cut-off events. [2024-06-28 00:54:17,810 INFO L125 PetriNetUnfolderBase]: For 423933/424346 co-relation queries the response was YES. [2024-06-28 00:54:17,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67359 conditions, 9250 events. 5600/9250 cut-off events. For 423933/424346 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 66332 event pairs, 1299 based on Foata normal form. 305/9416 useless extension candidates. Maximal degree in co-relation 67230. Up to 7649 conditions per place. [2024-06-28 00:54:17,942 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 276 selfloop transitions, 126 changer transitions 2/418 dead transitions. [2024-06-28 00:54:17,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 418 transitions, 7334 flow [2024-06-28 00:54:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:54:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:54:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-28 00:54:17,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:54:17,943 INFO L175 Difference]: Start difference. First operand has 282 places, 380 transitions, 6132 flow. Second operand 7 states and 203 transitions. [2024-06-28 00:54:17,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 418 transitions, 7334 flow [2024-06-28 00:54:19,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 418 transitions, 7217 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 00:54:19,215 INFO L231 Difference]: Finished difference. Result has 282 places, 383 transitions, 6321 flow [2024-06-28 00:54:19,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6015, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6321, PETRI_PLACES=282, PETRI_TRANSITIONS=383} [2024-06-28 00:54:19,216 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 233 predicate places. [2024-06-28 00:54:19,216 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 383 transitions, 6321 flow [2024-06-28 00:54:19,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:19,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:19,217 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 00:54:19,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 00:54:19,217 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 00:54:19,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:19,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1049920166, now seen corresponding path program 1 times [2024-06-28 00:54:19,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:19,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786383163] [2024-06-28 00:54:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:19,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:19,339 INFO 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 00:54:19,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:19,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786383163] [2024-06-28 00:54:19,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786383163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:19,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:19,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:19,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733152049] [2024-06-28 00:54:19,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:19,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:19,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:19,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:19,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:19,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:19,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 383 transitions, 6321 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:19,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:19,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:19,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:20,816 INFO L124 PetriNetUnfolderBase]: 5635/9289 cut-off events. [2024-06-28 00:54:20,816 INFO L125 PetriNetUnfolderBase]: For 441977/442360 co-relation queries the response was YES. [2024-06-28 00:54:20,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68665 conditions, 9289 events. 5635/9289 cut-off events. For 441977/442360 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 66575 event pairs, 1251 based on Foata normal form. 290/9443 useless extension candidates. Maximal degree in co-relation 68535. Up to 7035 conditions per place. [2024-06-28 00:54:20,945 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 220 selfloop transitions, 205 changer transitions 2/441 dead transitions. [2024-06-28 00:54:20,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 441 transitions, 8157 flow [2024-06-28 00:54:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-28 00:54:20,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-06-28 00:54:20,946 INFO L175 Difference]: Start difference. First operand has 282 places, 383 transitions, 6321 flow. Second operand 8 states and 238 transitions. [2024-06-28 00:54:20,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 441 transitions, 8157 flow [2024-06-28 00:54:22,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 441 transitions, 7742 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 00:54:22,418 INFO L231 Difference]: Finished difference. Result has 284 places, 398 transitions, 6694 flow [2024-06-28 00:54:22,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=5906, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6694, PETRI_PLACES=284, PETRI_TRANSITIONS=398} [2024-06-28 00:54:22,419 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 235 predicate places. [2024-06-28 00:54:22,419 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 398 transitions, 6694 flow [2024-06-28 00:54:22,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:22,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:22,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:54:22,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 00:54:22,419 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 00:54:22,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash 693726688, now seen corresponding path program 2 times [2024-06-28 00:54:22,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:22,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891250748] [2024-06-28 00:54:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:22,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:22,548 INFO 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 00:54:22,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:22,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891250748] [2024-06-28 00:54:22,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891250748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:22,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:22,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:22,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110830622] [2024-06-28 00:54:22,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:22,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:22,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:22,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:22,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 398 transitions, 6694 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:22,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:22,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:22,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:24,123 INFO L124 PetriNetUnfolderBase]: 5674/9331 cut-off events. [2024-06-28 00:54:24,124 INFO L125 PetriNetUnfolderBase]: For 460073/460537 co-relation queries the response was YES. [2024-06-28 00:54:24,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70489 conditions, 9331 events. 5674/9331 cut-off events. For 460073/460537 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 66787 event pairs, 1240 based on Foata normal form. 297/9485 useless extension candidates. Maximal degree in co-relation 70360. Up to 7748 conditions per place. [2024-06-28 00:54:24,251 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 277 selfloop transitions, 149 changer transitions 2/442 dead transitions. [2024-06-28 00:54:24,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 442 transitions, 7952 flow [2024-06-28 00:54:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-28 00:54:24,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:54:24,252 INFO L175 Difference]: Start difference. First operand has 284 places, 398 transitions, 6694 flow. Second operand 8 states and 232 transitions. [2024-06-28 00:54:24,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 442 transitions, 7952 flow [2024-06-28 00:54:25,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 442 transitions, 7767 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-06-28 00:54:25,788 INFO L231 Difference]: Finished difference. Result has 290 places, 401 transitions, 6843 flow [2024-06-28 00:54:25,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6509, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6843, PETRI_PLACES=290, PETRI_TRANSITIONS=401} [2024-06-28 00:54:25,789 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 241 predicate places. [2024-06-28 00:54:25,789 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 401 transitions, 6843 flow [2024-06-28 00:54:25,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:25,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:25,789 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 00:54:25,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 00:54:25,790 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 00:54:25,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:25,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1861801048, now seen corresponding path program 2 times [2024-06-28 00:54:25,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:25,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175630792] [2024-06-28 00:54:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:25,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:54:25,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:25,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175630792] [2024-06-28 00:54:25,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175630792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:25,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:25,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:25,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647697713] [2024-06-28 00:54:25,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:25,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:25,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:25,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:25,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:25,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:25,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 401 transitions, 6843 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:25,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:25,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:25,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:27,600 INFO L124 PetriNetUnfolderBase]: 5711/9450 cut-off events. [2024-06-28 00:54:27,600 INFO L125 PetriNetUnfolderBase]: For 469122/469540 co-relation queries the response was YES. [2024-06-28 00:54:27,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70114 conditions, 9450 events. 5711/9450 cut-off events. For 469122/469540 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 68278 event pairs, 1283 based on Foata normal form. 315/9624 useless extension candidates. Maximal degree in co-relation 69982. Up to 7097 conditions per place. [2024-06-28 00:54:27,723 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 224 selfloop transitions, 213 changer transitions 1/452 dead transitions. [2024-06-28 00:54:27,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 452 transitions, 8687 flow [2024-06-28 00:54:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-28 00:54:27,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-06-28 00:54:27,724 INFO L175 Difference]: Start difference. First operand has 290 places, 401 transitions, 6843 flow. Second operand 8 states and 238 transitions. [2024-06-28 00:54:27,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 452 transitions, 8687 flow [2024-06-28 00:54:29,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 452 transitions, 8455 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 00:54:29,133 INFO L231 Difference]: Finished difference. Result has 293 places, 411 transitions, 7253 flow [2024-06-28 00:54:29,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6611, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7253, PETRI_PLACES=293, PETRI_TRANSITIONS=411} [2024-06-28 00:54:29,134 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 244 predicate places. [2024-06-28 00:54:29,134 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 411 transitions, 7253 flow [2024-06-28 00:54:29,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:29,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:29,135 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 00:54:29,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 00:54:29,135 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 00:54:29,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:29,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1889836512, now seen corresponding path program 3 times [2024-06-28 00:54:29,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:29,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195855847] [2024-06-28 00:54:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:29,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:54:29,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:29,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195855847] [2024-06-28 00:54:29,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195855847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:29,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:29,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:29,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266659327] [2024-06-28 00:54:29,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:29,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:29,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:29,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:29,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:29,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:29,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 411 transitions, 7253 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:29,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:29,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:29,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:31,150 INFO L124 PetriNetUnfolderBase]: 5767/9488 cut-off events. [2024-06-28 00:54:31,150 INFO L125 PetriNetUnfolderBase]: For 487444/487901 co-relation queries the response was YES. [2024-06-28 00:54:31,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71461 conditions, 9488 events. 5767/9488 cut-off events. For 487444/487901 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 68093 event pairs, 1242 based on Foata normal form. 299/9642 useless extension candidates. Maximal degree in co-relation 71327. Up to 7867 conditions per place. [2024-06-28 00:54:31,263 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 287 selfloop transitions, 156 changer transitions 2/459 dead transitions. [2024-06-28 00:54:31,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 459 transitions, 8731 flow [2024-06-28 00:54:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:54:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:54:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-06-28 00:54:31,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6271604938271605 [2024-06-28 00:54:31,265 INFO L175 Difference]: Start difference. First operand has 293 places, 411 transitions, 7253 flow. Second operand 9 states and 254 transitions. [2024-06-28 00:54:31,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 459 transitions, 8731 flow [2024-06-28 00:54:32,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 459 transitions, 8337 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-28 00:54:32,645 INFO L231 Difference]: Finished difference. Result has 299 places, 417 transitions, 7251 flow [2024-06-28 00:54:32,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6867, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7251, PETRI_PLACES=299, PETRI_TRANSITIONS=417} [2024-06-28 00:54:32,645 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 250 predicate places. [2024-06-28 00:54:32,645 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 417 transitions, 7251 flow [2024-06-28 00:54:32,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:32,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:32,646 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 00:54:32,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 00:54:32,646 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 00:54:32,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:32,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1862038198, now seen corresponding path program 3 times [2024-06-28 00:54:32,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:32,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131229843] [2024-06-28 00:54:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:32,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:32,768 INFO 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 00:54:32,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:32,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131229843] [2024-06-28 00:54:32,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131229843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:32,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:32,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:32,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733692601] [2024-06-28 00:54:32,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:32,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:32,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:32,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:32,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:32,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:32,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 417 transitions, 7251 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:32,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:32,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:32,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:34,486 INFO L124 PetriNetUnfolderBase]: 5738/9466 cut-off events. [2024-06-28 00:54:34,487 INFO L125 PetriNetUnfolderBase]: For 494577/494978 co-relation queries the response was YES. [2024-06-28 00:54:34,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70673 conditions, 9466 events. 5738/9466 cut-off events. For 494577/494978 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 68122 event pairs, 1257 based on Foata normal form. 300/9625 useless extension candidates. Maximal degree in co-relation 70538. Up to 7117 conditions per place. [2024-06-28 00:54:34,602 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 223 selfloop transitions, 220 changer transitions 0/457 dead transitions. [2024-06-28 00:54:34,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 457 transitions, 8781 flow [2024-06-28 00:54:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:34,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-28 00:54:34,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-28 00:54:34,603 INFO L175 Difference]: Start difference. First operand has 299 places, 417 transitions, 7251 flow. Second operand 8 states and 237 transitions. [2024-06-28 00:54:34,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 457 transitions, 8781 flow [2024-06-28 00:54:36,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 457 transitions, 8417 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 00:54:36,177 INFO L231 Difference]: Finished difference. Result has 301 places, 417 transitions, 7333 flow [2024-06-28 00:54:36,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6887, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7333, PETRI_PLACES=301, PETRI_TRANSITIONS=417} [2024-06-28 00:54:36,178 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 252 predicate places. [2024-06-28 00:54:36,178 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 417 transitions, 7333 flow [2024-06-28 00:54:36,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:36,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:36,178 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 00:54:36,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 00:54:36,178 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 00:54:36,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:36,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1664921888, now seen corresponding path program 4 times [2024-06-28 00:54:36,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:36,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154288372] [2024-06-28 00:54:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:36,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:54:36,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:36,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154288372] [2024-06-28 00:54:36,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154288372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:36,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:36,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:36,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684485981] [2024-06-28 00:54:36,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:36,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:36,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:36,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:36,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:36,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:36,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 417 transitions, 7333 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:36,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:36,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:36,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:38,112 INFO L124 PetriNetUnfolderBase]: 5796/9656 cut-off events. [2024-06-28 00:54:38,112 INFO L125 PetriNetUnfolderBase]: For 521944/522347 co-relation queries the response was YES. [2024-06-28 00:54:38,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71879 conditions, 9656 events. 5796/9656 cut-off events. For 521944/522347 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 70293 event pairs, 1373 based on Foata normal form. 261/9784 useless extension candidates. Maximal degree in co-relation 71743. Up to 8387 conditions per place. [2024-06-28 00:54:38,245 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 383 selfloop transitions, 54 changer transitions 0/451 dead transitions. [2024-06-28 00:54:38,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 451 transitions, 8349 flow [2024-06-28 00:54:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:38,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-28 00:54:38,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-28 00:54:38,246 INFO L175 Difference]: Start difference. First operand has 301 places, 417 transitions, 7333 flow. Second operand 8 states and 218 transitions. [2024-06-28 00:54:38,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 451 transitions, 8349 flow [2024-06-28 00:54:39,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 451 transitions, 7911 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 00:54:39,705 INFO L231 Difference]: Finished difference. Result has 303 places, 418 transitions, 7030 flow [2024-06-28 00:54:39,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6895, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7030, PETRI_PLACES=303, PETRI_TRANSITIONS=418} [2024-06-28 00:54:39,706 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 254 predicate places. [2024-06-28 00:54:39,706 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 418 transitions, 7030 flow [2024-06-28 00:54:39,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:39,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:39,706 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 00:54:39,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 00:54:39,706 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 00:54:39,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:39,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1664595458, now seen corresponding path program 5 times [2024-06-28 00:54:39,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:39,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059468513] [2024-06-28 00:54:39,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:39,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:39,839 INFO 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 00:54:39,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:39,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059468513] [2024-06-28 00:54:39,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059468513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:39,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:39,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:39,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106018422] [2024-06-28 00:54:39,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:39,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:39,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:39,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:39,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:39,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:39,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 418 transitions, 7030 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:39,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:39,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:39,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:41,549 INFO L124 PetriNetUnfolderBase]: 6020/10096 cut-off events. [2024-06-28 00:54:41,549 INFO L125 PetriNetUnfolderBase]: For 547679/547998 co-relation queries the response was YES. [2024-06-28 00:54:41,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74212 conditions, 10096 events. 6020/10096 cut-off events. For 547679/547998 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 74225 event pairs, 1641 based on Foata normal form. 259/10282 useless extension candidates. Maximal degree in co-relation 74075. Up to 8567 conditions per place. [2024-06-28 00:54:41,707 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 386 selfloop transitions, 57 changer transitions 0/457 dead transitions. [2024-06-28 00:54:41,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 457 transitions, 8238 flow [2024-06-28 00:54:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-28 00:54:41,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2024-06-28 00:54:41,709 INFO L175 Difference]: Start difference. First operand has 303 places, 418 transitions, 7030 flow. Second operand 8 states and 221 transitions. [2024-06-28 00:54:41,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 457 transitions, 8238 flow [2024-06-28 00:54:43,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 457 transitions, 8125 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:54:43,370 INFO L231 Difference]: Finished difference. Result has 305 places, 420 transitions, 7081 flow [2024-06-28 00:54:43,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6917, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7081, PETRI_PLACES=305, PETRI_TRANSITIONS=420} [2024-06-28 00:54:43,370 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 256 predicate places. [2024-06-28 00:54:43,370 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 420 transitions, 7081 flow [2024-06-28 00:54:43,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:43,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:43,371 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 00:54:43,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 00:54:43,371 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 00:54:43,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:43,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2118634676, now seen corresponding path program 6 times [2024-06-28 00:54:43,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:43,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080555286] [2024-06-28 00:54:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:43,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:43,511 INFO 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 00:54:43,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:43,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080555286] [2024-06-28 00:54:43,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080555286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:43,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:43,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:43,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845108240] [2024-06-28 00:54:43,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:43,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:43,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:43,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:43,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:43,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:43,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 420 transitions, 7081 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:43,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:43,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:43,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:45,383 INFO L124 PetriNetUnfolderBase]: 6002/10070 cut-off events. [2024-06-28 00:54:45,383 INFO L125 PetriNetUnfolderBase]: For 546199/546518 co-relation queries the response was YES. [2024-06-28 00:54:45,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73695 conditions, 10070 events. 6002/10070 cut-off events. For 546199/546518 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 74169 event pairs, 1648 based on Foata normal form. 261/10258 useless extension candidates. Maximal degree in co-relation 73557. Up to 8722 conditions per place. [2024-06-28 00:54:45,542 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 384 selfloop transitions, 55 changer transitions 0/453 dead transitions. [2024-06-28 00:54:45,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 453 transitions, 8081 flow [2024-06-28 00:54:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-28 00:54:45,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-28 00:54:45,543 INFO L175 Difference]: Start difference. First operand has 305 places, 420 transitions, 7081 flow. Second operand 8 states and 217 transitions. [2024-06-28 00:54:45,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 453 transitions, 8081 flow [2024-06-28 00:54:47,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 453 transitions, 8000 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 00:54:47,385 INFO L231 Difference]: Finished difference. Result has 309 places, 420 transitions, 7115 flow [2024-06-28 00:54:47,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7000, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7115, PETRI_PLACES=309, PETRI_TRANSITIONS=420} [2024-06-28 00:54:47,385 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 260 predicate places. [2024-06-28 00:54:47,386 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 420 transitions, 7115 flow [2024-06-28 00:54:47,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:47,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:47,386 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 00:54:47,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 00:54:47,386 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 00:54:47,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:47,387 INFO L85 PathProgramCache]: Analyzing trace with hash 963608346, now seen corresponding path program 4 times [2024-06-28 00:54:47,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:47,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219790945] [2024-06-28 00:54:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:47,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:47,489 INFO 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 00:54:47,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:47,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219790945] [2024-06-28 00:54:47,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219790945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:47,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:47,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:54:47,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823580234] [2024-06-28 00:54:47,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:47,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:54:47,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:47,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:54:47,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:54:47,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:47,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 420 transitions, 7115 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:47,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:47,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:47,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:49,450 INFO L124 PetriNetUnfolderBase]: 6025/9915 cut-off events. [2024-06-28 00:54:49,450 INFO L125 PetriNetUnfolderBase]: For 553204/553685 co-relation queries the response was YES. [2024-06-28 00:54:49,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73840 conditions, 9915 events. 6025/9915 cut-off events. For 553204/553685 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 71687 event pairs, 1313 based on Foata normal form. 341/10115 useless extension candidates. Maximal degree in co-relation 73700. Up to 8343 conditions per place. [2024-06-28 00:54:49,563 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 319 selfloop transitions, 126 changer transitions 2/461 dead transitions. [2024-06-28 00:54:49,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 461 transitions, 8526 flow [2024-06-28 00:54:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:54:49,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:54:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-28 00:54:49,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-06-28 00:54:49,564 INFO L175 Difference]: Start difference. First operand has 309 places, 420 transitions, 7115 flow. Second operand 6 states and 176 transitions. [2024-06-28 00:54:49,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 461 transitions, 8526 flow [2024-06-28 00:54:51,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 461 transitions, 8406 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 00:54:51,385 INFO L231 Difference]: Finished difference. Result has 308 places, 432 transitions, 7407 flow [2024-06-28 00:54:51,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=6995, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7407, PETRI_PLACES=308, PETRI_TRANSITIONS=432} [2024-06-28 00:54:51,385 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 259 predicate places. [2024-06-28 00:54:51,386 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 432 transitions, 7407 flow [2024-06-28 00:54:51,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:51,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:51,386 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 00:54:51,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 00:54:51,386 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 00:54:51,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:51,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1017523594, now seen corresponding path program 5 times [2024-06-28 00:54:51,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:51,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378074412] [2024-06-28 00:54:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:51,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:54:51,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:51,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378074412] [2024-06-28 00:54:51,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378074412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:51,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:51,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:51,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859339143] [2024-06-28 00:54:51,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:51,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:51,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:51,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:51,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:51,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:51,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 432 transitions, 7407 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:51,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:51,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:51,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:53,539 INFO L124 PetriNetUnfolderBase]: 5997/9968 cut-off events. [2024-06-28 00:54:53,539 INFO L125 PetriNetUnfolderBase]: For 562781/563276 co-relation queries the response was YES. [2024-06-28 00:54:53,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74093 conditions, 9968 events. 5997/9968 cut-off events. For 562781/563276 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 73041 event pairs, 1370 based on Foata normal form. 339/10167 useless extension candidates. Maximal degree in co-relation 73952. Up to 8580 conditions per place. [2024-06-28 00:54:53,683 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 369 selfloop transitions, 86 changer transitions 2/471 dead transitions. [2024-06-28 00:54:53,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 471 transitions, 8458 flow [2024-06-28 00:54:53,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:53,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-28 00:54:53,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 00:54:53,685 INFO L175 Difference]: Start difference. First operand has 308 places, 432 transitions, 7407 flow. Second operand 8 states and 224 transitions. [2024-06-28 00:54:53,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 471 transitions, 8458 flow [2024-06-28 00:54:55,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 471 transitions, 8295 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-28 00:54:55,619 INFO L231 Difference]: Finished difference. Result has 314 places, 435 transitions, 7457 flow [2024-06-28 00:54:55,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7247, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7457, PETRI_PLACES=314, PETRI_TRANSITIONS=435} [2024-06-28 00:54:55,619 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 265 predicate places. [2024-06-28 00:54:55,620 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 435 transitions, 7457 flow [2024-06-28 00:54:55,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:55,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:55,620 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 00:54:55,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 00:54:55,620 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 00:54:55,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:55,621 INFO L85 PathProgramCache]: Analyzing trace with hash 963728502, now seen corresponding path program 4 times [2024-06-28 00:54:55,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:55,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107617895] [2024-06-28 00:54:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:55,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:55,739 INFO 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 00:54:55,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:55,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107617895] [2024-06-28 00:54:55,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107617895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:55,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:55,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:54:55,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285774398] [2024-06-28 00:54:55,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:55,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:54:55,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:55,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:54:55,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:54:55,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:54:55,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 435 transitions, 7457 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:55,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:54:55,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:54:55,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:54:57,546 INFO L124 PetriNetUnfolderBase]: 6044/10492 cut-off events. [2024-06-28 00:54:57,547 INFO L125 PetriNetUnfolderBase]: For 585362/585799 co-relation queries the response was YES. [2024-06-28 00:54:57,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75737 conditions, 10492 events. 6044/10492 cut-off events. For 585362/585799 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 80941 event pairs, 1591 based on Foata normal form. 348/10730 useless extension candidates. Maximal degree in co-relation 75595. Up to 8294 conditions per place. [2024-06-28 00:54:57,693 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 335 selfloop transitions, 135 changer transitions 2/486 dead transitions. [2024-06-28 00:54:57,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 486 transitions, 9153 flow [2024-06-28 00:54:57,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:54:57,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:54:57,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-28 00:54:57,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-28 00:54:57,695 INFO L175 Difference]: Start difference. First operand has 314 places, 435 transitions, 7457 flow. Second operand 8 states and 231 transitions. [2024-06-28 00:54:57,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 486 transitions, 9153 flow [2024-06-28 00:54:59,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 486 transitions, 8981 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 00:54:59,848 INFO L231 Difference]: Finished difference. Result has 317 places, 447 transitions, 7802 flow [2024-06-28 00:54:59,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7285, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7802, PETRI_PLACES=317, PETRI_TRANSITIONS=447} [2024-06-28 00:54:59,849 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 268 predicate places. [2024-06-28 00:54:59,849 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 447 transitions, 7802 flow [2024-06-28 00:54:59,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:54:59,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:54:59,849 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 00:54:59,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 00:54:59,849 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 00:54:59,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:54:59,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1854289350, now seen corresponding path program 6 times [2024-06-28 00:54:59,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:54:59,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465096865] [2024-06-28 00:54:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:54:59,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:54:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:54:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:54:59,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:54:59,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465096865] [2024-06-28 00:54:59,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465096865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:54:59,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:54:59,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:54:59,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160045212] [2024-06-28 00:54:59,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:54:59,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:54:59,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:54:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:54:59,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:55:00,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:00,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 447 transitions, 7802 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:00,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:00,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:00,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:01,812 INFO L124 PetriNetUnfolderBase]: 6126/10123 cut-off events. [2024-06-28 00:55:01,812 INFO L125 PetriNetUnfolderBase]: For 603921/604408 co-relation queries the response was YES. [2024-06-28 00:55:01,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76562 conditions, 10123 events. 6126/10123 cut-off events. For 603921/604408 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 73771 event pairs, 1295 based on Foata normal form. 372/10385 useless extension candidates. Maximal degree in co-relation 76418. Up to 8490 conditions per place. [2024-06-28 00:55:01,968 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 329 selfloop transitions, 146 changer transitions 3/492 dead transitions. [2024-06-28 00:55:01,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 492 transitions, 9354 flow [2024-06-28 00:55:01,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:55:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:55:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-28 00:55:01,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-28 00:55:01,970 INFO L175 Difference]: Start difference. First operand has 317 places, 447 transitions, 7802 flow. Second operand 8 states and 232 transitions. [2024-06-28 00:55:01,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 492 transitions, 9354 flow [2024-06-28 00:55:03,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 492 transitions, 9142 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-28 00:55:03,964 INFO L231 Difference]: Finished difference. Result has 322 places, 450 transitions, 7925 flow [2024-06-28 00:55:03,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7590, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7925, PETRI_PLACES=322, PETRI_TRANSITIONS=450} [2024-06-28 00:55:03,964 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 273 predicate places. [2024-06-28 00:55:03,964 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 450 transitions, 7925 flow [2024-06-28 00:55:03,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:03,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:03,965 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 00:55:03,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 00:55:03,965 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 00:55:03,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:03,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1023064534, now seen corresponding path program 7 times [2024-06-28 00:55:03,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:03,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522496904] [2024-06-28 00:55:03,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:03,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:04,077 INFO 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 00:55:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522496904] [2024-06-28 00:55:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522496904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:04,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:55:04,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644617898] [2024-06-28 00:55:04,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:04,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:55:04,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:04,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:55:04,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:55:04,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:04,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 450 transitions, 7925 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:04,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:04,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:04,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:05,789 INFO L124 PetriNetUnfolderBase]: 6139/10136 cut-off events. [2024-06-28 00:55:05,789 INFO L125 PetriNetUnfolderBase]: For 615407/615895 co-relation queries the response was YES. [2024-06-28 00:55:05,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76833 conditions, 10136 events. 6139/10136 cut-off events. For 615407/615895 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 73786 event pairs, 1297 based on Foata normal form. 365/10385 useless extension candidates. Maximal degree in co-relation 76688. Up to 8505 conditions per place. [2024-06-28 00:55:05,945 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 324 selfloop transitions, 153 changer transitions 3/494 dead transitions. [2024-06-28 00:55:05,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 494 transitions, 9345 flow [2024-06-28 00:55:05,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:55:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:55:05,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-06-28 00:55:05,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6197530864197531 [2024-06-28 00:55:05,946 INFO L175 Difference]: Start difference. First operand has 322 places, 450 transitions, 7925 flow. Second operand 9 states and 251 transitions. [2024-06-28 00:55:05,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 494 transitions, 9345 flow [2024-06-28 00:55:08,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 494 transitions, 8926 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 00:55:08,271 INFO L231 Difference]: Finished difference. Result has 324 places, 453 transitions, 7860 flow [2024-06-28 00:55:08,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7515, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7860, PETRI_PLACES=324, PETRI_TRANSITIONS=453} [2024-06-28 00:55:08,272 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 275 predicate places. [2024-06-28 00:55:08,273 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 453 transitions, 7860 flow [2024-06-28 00:55:08,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:08,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:08,273 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 00:55:08,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 00:55:08,273 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 00:55:08,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1714062346, now seen corresponding path program 1 times [2024-06-28 00:55:08,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:08,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045502856] [2024-06-28 00:55:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:08,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:08,380 INFO 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 00:55:08,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:08,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045502856] [2024-06-28 00:55:08,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045502856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:08,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:08,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:55:08,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808891399] [2024-06-28 00:55:08,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:08,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:55:08,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:08,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:55:08,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:55:08,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:08,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 453 transitions, 7860 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:08,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:08,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:08,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:10,136 INFO L124 PetriNetUnfolderBase]: 6123/10178 cut-off events. [2024-06-28 00:55:10,137 INFO L125 PetriNetUnfolderBase]: For 623993/624420 co-relation queries the response was YES. [2024-06-28 00:55:10,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76614 conditions, 10178 events. 6123/10178 cut-off events. For 623993/624420 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 74787 event pairs, 1334 based on Foata normal form. 342/10384 useless extension candidates. Maximal degree in co-relation 76468. Up to 8492 conditions per place. [2024-06-28 00:55:10,282 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 357 selfloop transitions, 124 changer transitions 3/498 dead transitions. [2024-06-28 00:55:10,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 498 transitions, 9515 flow [2024-06-28 00:55:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:55:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:55:10,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-28 00:55:10,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-28 00:55:10,283 INFO L175 Difference]: Start difference. First operand has 324 places, 453 transitions, 7860 flow. Second operand 8 states and 228 transitions. [2024-06-28 00:55:10,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 498 transitions, 9515 flow [2024-06-28 00:55:12,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 498 transitions, 9249 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 00:55:12,770 INFO L231 Difference]: Finished difference. Result has 326 places, 462 transitions, 7979 flow [2024-06-28 00:55:12,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7594, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7979, PETRI_PLACES=326, PETRI_TRANSITIONS=462} [2024-06-28 00:55:12,771 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 277 predicate places. [2024-06-28 00:55:12,771 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 462 transitions, 7979 flow [2024-06-28 00:55:12,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:12,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:12,771 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 00:55:12,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 00:55:12,771 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 00:55:12,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:12,772 INFO L85 PathProgramCache]: Analyzing trace with hash 472302354, now seen corresponding path program 8 times [2024-06-28 00:55:12,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:12,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46291083] [2024-06-28 00:55:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:12,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:12,888 INFO 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 00:55:12,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:12,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46291083] [2024-06-28 00:55:12,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46291083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:12,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:12,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:55:12,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689322798] [2024-06-28 00:55:12,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:12,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:55:12,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:12,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:55:12,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:55:12,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:12,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 462 transitions, 7979 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:12,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:12,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:12,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:15,355 INFO L124 PetriNetUnfolderBase]: 6142/10594 cut-off events. [2024-06-28 00:55:15,355 INFO L125 PetriNetUnfolderBase]: For 644813/645296 co-relation queries the response was YES. [2024-06-28 00:55:15,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77688 conditions, 10594 events. 6142/10594 cut-off events. For 644813/645296 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 81483 event pairs, 1602 based on Foata normal form. 345/10819 useless extension candidates. Maximal degree in co-relation 77541. Up to 8757 conditions per place. [2024-06-28 00:55:15,498 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 402 selfloop transitions, 93 changer transitions 5/514 dead transitions. [2024-06-28 00:55:15,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 514 transitions, 9343 flow [2024-06-28 00:55:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:55:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:55:15,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 294 transitions. [2024-06-28 00:55:15,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593939393939394 [2024-06-28 00:55:15,500 INFO L175 Difference]: Start difference. First operand has 326 places, 462 transitions, 7979 flow. Second operand 11 states and 294 transitions. [2024-06-28 00:55:15,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 514 transitions, 9343 flow [2024-06-28 00:55:17,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 514 transitions, 9121 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 00:55:17,809 INFO L231 Difference]: Finished difference. Result has 335 places, 468 transitions, 8041 flow [2024-06-28 00:55:17,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7757, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8041, PETRI_PLACES=335, PETRI_TRANSITIONS=468} [2024-06-28 00:55:17,809 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 286 predicate places. [2024-06-28 00:55:17,810 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 468 transitions, 8041 flow [2024-06-28 00:55:17,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:17,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:17,810 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 00:55:17,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 00:55:17,810 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 00:55:17,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash 472296774, now seen corresponding path program 9 times [2024-06-28 00:55:17,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:17,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29466054] [2024-06-28 00:55:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:17,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:17,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:17,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29466054] [2024-06-28 00:55:17,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29466054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:17,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:17,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:55:17,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699731071] [2024-06-28 00:55:17,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:17,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:55:17,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:17,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:55:17,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:55:17,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:17,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 468 transitions, 8041 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:17,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:17,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:17,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:20,459 INFO L124 PetriNetUnfolderBase]: 6152/10247 cut-off events. [2024-06-28 00:55:20,460 INFO L125 PetriNetUnfolderBase]: For 654543/655074 co-relation queries the response was YES. [2024-06-28 00:55:20,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76990 conditions, 10247 events. 6152/10247 cut-off events. For 654543/655074 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 75570 event pairs, 1359 based on Foata normal form. 363/10475 useless extension candidates. Maximal degree in co-relation 76840. Up to 8777 conditions per place. [2024-06-28 00:55:20,596 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 405 selfloop transitions, 93 changer transitions 7/519 dead transitions. [2024-06-28 00:55:20,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 519 transitions, 9209 flow [2024-06-28 00:55:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:55:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:55:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 339 transitions. [2024-06-28 00:55:20,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5794871794871795 [2024-06-28 00:55:20,597 INFO L175 Difference]: Start difference. First operand has 335 places, 468 transitions, 8041 flow. Second operand 13 states and 339 transitions. [2024-06-28 00:55:20,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 519 transitions, 9209 flow [2024-06-28 00:55:22,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 519 transitions, 8974 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-28 00:55:22,641 INFO L231 Difference]: Finished difference. Result has 339 places, 468 transitions, 7998 flow [2024-06-28 00:55:22,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7998, PETRI_PLACES=339, PETRI_TRANSITIONS=468} [2024-06-28 00:55:22,642 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 290 predicate places. [2024-06-28 00:55:22,642 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 468 transitions, 7998 flow [2024-06-28 00:55:22,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:22,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:22,642 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 00:55:22,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 00:55:22,642 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 00:55:22,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:22,643 INFO L85 PathProgramCache]: Analyzing trace with hash 472308120, now seen corresponding path program 5 times [2024-06-28 00:55:22,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:22,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433786850] [2024-06-28 00:55:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:22,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:22,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:22,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433786850] [2024-06-28 00:55:22,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433786850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:22,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:22,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:55:22,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645453277] [2024-06-28 00:55:22,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:22,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:55:22,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:22,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:55:22,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:55:22,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:22,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 468 transitions, 7998 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:22,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:22,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:22,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:25,230 INFO L124 PetriNetUnfolderBase]: 6166/10716 cut-off events. [2024-06-28 00:55:25,230 INFO L125 PetriNetUnfolderBase]: For 676044/676464 co-relation queries the response was YES. [2024-06-28 00:55:25,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78348 conditions, 10716 events. 6166/10716 cut-off events. For 676044/676464 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 83228 event pairs, 1625 based on Foata normal form. 341/10941 useless extension candidates. Maximal degree in co-relation 78197. Up to 8429 conditions per place. [2024-06-28 00:55:25,361 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 351 selfloop transitions, 153 changer transitions 5/523 dead transitions. [2024-06-28 00:55:25,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 523 transitions, 9932 flow [2024-06-28 00:55:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:55:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:55:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 301 transitions. [2024-06-28 00:55:25,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6080808080808081 [2024-06-28 00:55:25,362 INFO L175 Difference]: Start difference. First operand has 339 places, 468 transitions, 7998 flow. Second operand 11 states and 301 transitions. [2024-06-28 00:55:25,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 523 transitions, 9932 flow [2024-06-28 00:55:27,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 523 transitions, 9742 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-28 00:55:27,712 INFO L231 Difference]: Finished difference. Result has 338 places, 474 transitions, 8266 flow [2024-06-28 00:55:27,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7808, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8266, PETRI_PLACES=338, PETRI_TRANSITIONS=474} [2024-06-28 00:55:27,712 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 289 predicate places. [2024-06-28 00:55:27,712 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 474 transitions, 8266 flow [2024-06-28 00:55:27,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:27,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:27,713 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 00:55:27,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 00:55:27,713 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 00:55:27,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:27,713 INFO L85 PathProgramCache]: Analyzing trace with hash 472296960, now seen corresponding path program 6 times [2024-06-28 00:55:27,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:27,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770454479] [2024-06-28 00:55:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:27,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:27,838 INFO 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 00:55:27,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:27,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770454479] [2024-06-28 00:55:27,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770454479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:27,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:27,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:55:27,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319391364] [2024-06-28 00:55:27,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:27,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:55:27,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:27,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:55:27,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:55:27,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:27,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 474 transitions, 8266 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:27,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:27,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:27,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:30,289 INFO L124 PetriNetUnfolderBase]: 6163/10694 cut-off events. [2024-06-28 00:55:30,289 INFO L125 PetriNetUnfolderBase]: For 687635/688034 co-relation queries the response was YES. [2024-06-28 00:55:30,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78794 conditions, 10694 events. 6163/10694 cut-off events. For 687635/688034 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 82910 event pairs, 1625 based on Foata normal form. 324/10900 useless extension candidates. Maximal degree in co-relation 78642. Up to 8426 conditions per place. [2024-06-28 00:55:30,437 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 350 selfloop transitions, 151 changer transitions 4/519 dead transitions. [2024-06-28 00:55:30,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 519 transitions, 9884 flow [2024-06-28 00:55:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:55:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:55:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 280 transitions. [2024-06-28 00:55:30,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-28 00:55:30,438 INFO L175 Difference]: Start difference. First operand has 338 places, 474 transitions, 8266 flow. Second operand 10 states and 280 transitions. [2024-06-28 00:55:30,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 519 transitions, 9884 flow [2024-06-28 00:55:33,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 519 transitions, 9512 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-28 00:55:33,028 INFO L231 Difference]: Finished difference. Result has 341 places, 474 transitions, 8202 flow [2024-06-28 00:55:33,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7894, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8202, PETRI_PLACES=341, PETRI_TRANSITIONS=474} [2024-06-28 00:55:33,029 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 292 predicate places. [2024-06-28 00:55:33,029 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 474 transitions, 8202 flow [2024-06-28 00:55:33,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:33,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:33,029 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 00:55:33,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 00:55:33,030 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 00:55:33,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:33,030 INFO L85 PathProgramCache]: Analyzing trace with hash 51898408, now seen corresponding path program 2 times [2024-06-28 00:55:33,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:33,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523816379] [2024-06-28 00:55:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:33,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:33,158 INFO 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 00:55:33,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:33,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523816379] [2024-06-28 00:55:33,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523816379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:33,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:33,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:55:33,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174284645] [2024-06-28 00:55:33,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:33,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:55:33,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:33,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:55:33,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:55:33,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:33,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 474 transitions, 8202 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:33,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:33,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:33,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:35,319 INFO L124 PetriNetUnfolderBase]: 6176/10271 cut-off events. [2024-06-28 00:55:35,319 INFO L125 PetriNetUnfolderBase]: For 692355/692778 co-relation queries the response was YES. [2024-06-28 00:55:35,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77938 conditions, 10271 events. 6176/10271 cut-off events. For 692355/692778 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 75651 event pairs, 1336 based on Foata normal form. 338/10468 useless extension candidates. Maximal degree in co-relation 77785. Up to 8566 conditions per place. [2024-06-28 00:55:35,722 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 368 selfloop transitions, 124 changer transitions 3/509 dead transitions. [2024-06-28 00:55:35,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 509 transitions, 9616 flow [2024-06-28 00:55:35,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:55:35,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:55:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-28 00:55:35,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 00:55:35,724 INFO L175 Difference]: Start difference. First operand has 341 places, 474 transitions, 8202 flow. Second operand 8 states and 225 transitions. [2024-06-28 00:55:35,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 509 transitions, 9616 flow [2024-06-28 00:55:37,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 509 transitions, 9272 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-28 00:55:37,609 INFO L231 Difference]: Finished difference. Result has 339 places, 474 transitions, 8112 flow [2024-06-28 00:55:37,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7858, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8112, PETRI_PLACES=339, PETRI_TRANSITIONS=474} [2024-06-28 00:55:37,609 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 290 predicate places. [2024-06-28 00:55:37,610 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 474 transitions, 8112 flow [2024-06-28 00:55:37,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:37,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:37,610 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 00:55:37,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 00:55:37,610 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 00:55:37,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:37,610 INFO L85 PathProgramCache]: Analyzing trace with hash 181874244, now seen corresponding path program 3 times [2024-06-28 00:55:37,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:37,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031387330] [2024-06-28 00:55:37,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:37,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:37,726 INFO 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 00:55:37,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:37,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031387330] [2024-06-28 00:55:37,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031387330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:37,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:37,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:55:37,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426492655] [2024-06-28 00:55:37,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:37,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:55:37,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:37,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:55:37,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:55:37,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:37,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 474 transitions, 8112 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:37,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:37,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:37,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:40,063 INFO L124 PetriNetUnfolderBase]: 6181/10828 cut-off events. [2024-06-28 00:55:40,063 INFO L125 PetriNetUnfolderBase]: For 714948/715373 co-relation queries the response was YES. [2024-06-28 00:55:40,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79215 conditions, 10828 events. 6181/10828 cut-off events. For 714948/715373 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 84790 event pairs, 1629 based on Foata normal form. 314/11031 useless extension candidates. Maximal degree in co-relation 79061. Up to 8555 conditions per place. [2024-06-28 00:55:40,532 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 371 selfloop transitions, 129 changer transitions 3/517 dead transitions. [2024-06-28 00:55:40,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 517 transitions, 9992 flow [2024-06-28 00:55:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:55:40,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:55:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-06-28 00:55:40,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6197530864197531 [2024-06-28 00:55:40,533 INFO L175 Difference]: Start difference. First operand has 339 places, 474 transitions, 8112 flow. Second operand 9 states and 251 transitions. [2024-06-28 00:55:40,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 517 transitions, 9992 flow [2024-06-28 00:55:42,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 517 transitions, 9724 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 00:55:42,971 INFO L231 Difference]: Finished difference. Result has 341 places, 480 transitions, 8224 flow [2024-06-28 00:55:42,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7856, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8224, PETRI_PLACES=341, PETRI_TRANSITIONS=480} [2024-06-28 00:55:42,972 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 292 predicate places. [2024-06-28 00:55:42,972 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 480 transitions, 8224 flow [2024-06-28 00:55:42,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:42,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:42,972 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 00:55:42,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 00:55:42,973 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 00:55:42,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:42,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1664694224, now seen corresponding path program 7 times [2024-06-28 00:55:42,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:42,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356041181] [2024-06-28 00:55:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:42,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:43,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:43,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356041181] [2024-06-28 00:55:43,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356041181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:43,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:43,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:55:43,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905858848] [2024-06-28 00:55:43,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:43,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:55:43,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:43,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:55:43,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:55:43,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:43,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 480 transitions, 8224 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:43,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:43,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:43,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:45,445 INFO L124 PetriNetUnfolderBase]: 6389/10546 cut-off events. [2024-06-28 00:55:45,446 INFO L125 PetriNetUnfolderBase]: For 766758/767165 co-relation queries the response was YES. [2024-06-28 00:55:45,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81833 conditions, 10546 events. 6389/10546 cut-off events. For 766758/767165 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 77308 event pairs, 1341 based on Foata normal form. 275/10648 useless extension candidates. Maximal degree in co-relation 81678. Up to 7757 conditions per place. [2024-06-28 00:55:45,613 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 245 selfloop transitions, 280 changer transitions 0/539 dead transitions. [2024-06-28 00:55:45,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 539 transitions, 10764 flow [2024-06-28 00:55:45,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:55:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:55:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-28 00:55:45,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 00:55:45,614 INFO L175 Difference]: Start difference. First operand has 341 places, 480 transitions, 8224 flow. Second operand 8 states and 234 transitions. [2024-06-28 00:55:45,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 539 transitions, 10764 flow [2024-06-28 00:55:48,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 539 transitions, 10393 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-28 00:55:48,396 INFO L231 Difference]: Finished difference. Result has 344 places, 504 transitions, 8987 flow [2024-06-28 00:55:48,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7853, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8987, PETRI_PLACES=344, PETRI_TRANSITIONS=504} [2024-06-28 00:55:48,396 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 295 predicate places. [2024-06-28 00:55:48,396 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 504 transitions, 8987 flow [2024-06-28 00:55:48,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:48,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:48,397 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 00:55:48,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 00:55:48,397 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 00:55:48,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:48,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1664687714, now seen corresponding path program 8 times [2024-06-28 00:55:48,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:48,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092245132] [2024-06-28 00:55:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:48,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:48,496 INFO 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 00:55:48,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:48,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092245132] [2024-06-28 00:55:48,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092245132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:48,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:48,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:55:48,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63932142] [2024-06-28 00:55:48,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:48,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:55:48,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:48,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:55:48,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:55:48,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:48,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 504 transitions, 8987 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:48,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:48,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:48,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:50,781 INFO L124 PetriNetUnfolderBase]: 6384/10537 cut-off events. [2024-06-28 00:55:50,781 INFO L125 PetriNetUnfolderBase]: For 781122/781527 co-relation queries the response was YES. [2024-06-28 00:55:50,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82394 conditions, 10537 events. 6384/10537 cut-off events. For 781122/781527 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 77383 event pairs, 1341 based on Foata normal form. 273/10637 useless extension candidates. Maximal degree in co-relation 82239. Up to 7753 conditions per place. [2024-06-28 00:55:50,932 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 246 selfloop transitions, 278 changer transitions 1/539 dead transitions. [2024-06-28 00:55:50,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 539 transitions, 10969 flow [2024-06-28 00:55:50,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:55:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:55:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-28 00:55:50,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-06-28 00:55:50,933 INFO L175 Difference]: Start difference. First operand has 344 places, 504 transitions, 8987 flow. Second operand 8 states and 233 transitions. [2024-06-28 00:55:50,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 539 transitions, 10969 flow [2024-06-28 00:55:53,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 539 transitions, 10414 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-28 00:55:53,804 INFO L231 Difference]: Finished difference. Result has 349 places, 504 transitions, 8994 flow [2024-06-28 00:55:53,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8432, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8994, PETRI_PLACES=349, PETRI_TRANSITIONS=504} [2024-06-28 00:55:53,804 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 300 predicate places. [2024-06-28 00:55:53,804 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 504 transitions, 8994 flow [2024-06-28 00:55:53,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:53,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:53,805 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 00:55:53,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 00:55:53,805 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 00:55:53,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:53,805 INFO L85 PathProgramCache]: Analyzing trace with hash 66422742, now seen corresponding path program 10 times [2024-06-28 00:55:53,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:53,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723615294] [2024-06-28 00:55:53,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:53,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:55:53,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:53,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723615294] [2024-06-28 00:55:53,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723615294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:53,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:53,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:55:53,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425499292] [2024-06-28 00:55:53,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:53,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:55:53,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:53,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:55:53,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:55:53,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:53,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 504 transitions, 8994 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:53,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:53,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:53,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:55:56,335 INFO L124 PetriNetUnfolderBase]: 6405/10543 cut-off events. [2024-06-28 00:55:56,335 INFO L125 PetriNetUnfolderBase]: For 793816/794264 co-relation queries the response was YES. [2024-06-28 00:55:56,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82415 conditions, 10543 events. 6405/10543 cut-off events. For 793816/794264 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 77056 event pairs, 1292 based on Foata normal form. 275/10658 useless extension candidates. Maximal degree in co-relation 82259. Up to 8746 conditions per place. [2024-06-28 00:55:56,472 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 344 selfloop transitions, 183 changer transitions 3/544 dead transitions. [2024-06-28 00:55:56,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 544 transitions, 10846 flow [2024-06-28 00:55:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:55:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:55:56,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-06-28 00:55:56,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6088888888888889 [2024-06-28 00:55:56,473 INFO L175 Difference]: Start difference. First operand has 349 places, 504 transitions, 8994 flow. Second operand 10 states and 274 transitions. [2024-06-28 00:55:56,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 544 transitions, 10846 flow [2024-06-28 00:55:59,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 544 transitions, 10318 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 00:55:59,565 INFO L231 Difference]: Finished difference. Result has 355 places, 504 transitions, 8838 flow [2024-06-28 00:55:59,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8466, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8838, PETRI_PLACES=355, PETRI_TRANSITIONS=504} [2024-06-28 00:55:59,565 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 306 predicate places. [2024-06-28 00:55:59,565 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 504 transitions, 8838 flow [2024-06-28 00:55:59,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:59,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:55:59,565 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 00:55:59,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 00:55:59,566 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 00:55:59,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:55:59,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1675649624, now seen corresponding path program 9 times [2024-06-28 00:55:59,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:55:59,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169287285] [2024-06-28 00:55:59,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:55:59,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:55:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:55:59,656 INFO 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 00:55:59,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:55:59,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169287285] [2024-06-28 00:55:59,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169287285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:55:59,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:55:59,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:55:59,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788900444] [2024-06-28 00:55:59,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:55:59,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:55:59,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:55:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:55:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:55:59,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-06-28 00:55:59,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 504 transitions, 8838 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:55:59,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:55:59,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-06-28 00:55:59,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand