./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe023_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe023_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe023_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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:17:19,194 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:17:19,225 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:17:19,228 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:17:19,229 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:17:19,241 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:17:19,242 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:17:19,242 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:17:19,242 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:17:19,243 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:17:19,243 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:17:19,243 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:17:19,244 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:17:19,244 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:17:19,244 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:17:19,245 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:17:19,245 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:17:19,245 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:17:19,246 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:17:19,246 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:17:19,246 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:17:19,247 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:17:19,247 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:17:19,247 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:17:19,248 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:17:19,248 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:17:19,248 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:17:19,248 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:17:19,249 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:17:19,249 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:17:19,249 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:17:19,250 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:17:19,250 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:17:19,250 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:17:19,250 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:17:19,251 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:17:19,251 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:17:19,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:17:19,252 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:17:19,252 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:17:19,252 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:17:19,252 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:17:19,253 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:17:19,253 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:17:19,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:17:19,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:17:19,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:17:19,427 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:17:19,428 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:17:19,429 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe023_tso.yml/witness.yml [2024-06-04 14:17:19,542 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:17:19,542 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:17:19,543 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-04 14:17:20,612 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:17:20,794 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:17:20,795 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-04 14:17:20,804 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8ebaa9e8/bb449e2f30734213ab91188542672e32/FLAGaab05f9c4 [2024-06-04 14:17:20,814 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8ebaa9e8/bb449e2f30734213ab91188542672e32 [2024-06-04 14:17:20,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:17:20,816 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:17:20,817 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:17:20,817 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:17:20,820 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:17:20,821 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:17:19" (1/2) ... [2024-06-04 14:17:20,821 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b25b1f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:17:20, skipping insertion in model container [2024-06-04 14:17:20,822 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:17:19" (1/2) ... [2024-06-04 14:17:20,822 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1453d491 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:17:20, skipping insertion in model container [2024-06-04 14:17:20,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:17:20" (2/2) ... [2024-06-04 14:17:20,823 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b25b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:20, skipping insertion in model container [2024-06-04 14:17:20,823 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:17:20" (2/2) ... [2024-06-04 14:17:20,823 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:17:20,852 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:17:20,853 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-04 14:17:20,854 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-04 14:17:20,854 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-04 14:17:20,854 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:17:20,854 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-04 14:17:20,884 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:17:21,108 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:17:21,115 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:17:21,233 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:17:21,268 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:17:21,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:21 WrapperNode [2024-06-04 14:17:21,271 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:17:21,272 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:17:21,273 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:17:21,273 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:17:21,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:21" (1/1) ... [2024-06-04 14:17:21,291 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:21" (1/1) ... [2024-06-04 14:17:21,310 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-04 14:17:21,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:17:21,311 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:17:21,311 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:17:21,311 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:17:21,323 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:21" (1/1) ... [2024-06-04 14:17:21,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:21" (1/1) ... [2024-06-04 14:17:21,325 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:21" (1/1) ... [2024-06-04 14:17:21,340 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]. [2024-06-04 14:17:21,343 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:21" (1/1) ... [2024-06-04 14:17:21,343 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:21" (1/1) ... [2024-06-04 14:17:21,347 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:21" (1/1) ... [2024-06-04 14:17:21,349 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:21" (1/1) ... [2024-06-04 14:17:21,350 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:21" (1/1) ... [2024-06-04 14:17:21,350 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:21" (1/1) ... [2024-06-04 14:17:21,352 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:17:21,353 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:17:21,353 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:17:21,353 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:17:21,354 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:21" (1/1) ... [2024-06-04 14:17:21,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:17:21,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:17:21,419 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) [2024-06-04 14:17:21,464 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 [2024-06-04 14:17:21,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:17:21,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:17:21,489 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:17:21,489 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:17:21,489 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:17:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:17:21,490 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:17:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:17:21,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:17:21,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:17:21,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:17:21,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:17:21,491 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:17:21,571 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:17:21,572 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:17:21,735 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:17:21,736 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:17:21,828 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:17:21,833 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:17:21,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:17:21 BoogieIcfgContainer [2024-06-04 14:17:21,833 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:17:21,837 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:17:21,837 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:17:21,839 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:17:21,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:17:19" (1/4) ... [2024-06-04 14:17:21,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff70940 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:17:21, skipping insertion in model container [2024-06-04 14:17:21,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:17:20" (2/4) ... [2024-06-04 14:17:21,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff70940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:17:21, skipping insertion in model container [2024-06-04 14:17:21,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:17:21" (3/4) ... [2024-06-04 14:17:21,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff70940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:17:21, skipping insertion in model container [2024-06-04 14:17:21,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:17:21" (4/4) ... [2024-06-04 14:17:21,842 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_tso.i [2024-06-04 14:17:21,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:17:21,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 14:17:21,855 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:17:21,900 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:17:21,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 14:17:21,966 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-04 14:17:21,966 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:17:21,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:17:21,969 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 14:17:21,971 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-04 14:17:21,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:17:21,983 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;@680ffad7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:17:21,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 14:17:21,986 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:17:21,986 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:17:21,986 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:17:21,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:21,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:17:21,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:21,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:21,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1787024188, now seen corresponding path program 1 times [2024-06-04 14:17:21,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:21,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820589886] [2024-06-04 14:17:21,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:21,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:22,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:22,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820589886] [2024-06-04 14:17:22,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820589886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:22,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:22,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:17:22,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356446224] [2024-06-04 14:17:22,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:22,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:17:22,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:22,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:17:22,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:17:22,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-04 14:17:22,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:22,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:22,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-04 14:17:22,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:22,638 INFO L124 PetriNetUnfolderBase]: 470/795 cut-off events. [2024-06-04 14:17:22,638 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-04 14:17:22,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 795 events. 470/795 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3833 event pairs, 281 based on Foata normal form. 1/752 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-04 14:17:22,650 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 29 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 14:17:22,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 167 flow [2024-06-04 14:17:22,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:17:22,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:17:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-06-04 14:17:22,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-06-04 14:17:22,662 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 87 transitions. [2024-06-04 14:17:22,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 167 flow [2024-06-04 14:17:22,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:17:22,667 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-04 14:17:22,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-04 14:17:22,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-04 14:17:22,671 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-04 14:17:22,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:22,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:22,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:22,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:17:22,672 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:22,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:22,674 INFO L85 PathProgramCache]: Analyzing trace with hash 656708195, now seen corresponding path program 1 times [2024-06-04 14:17:22,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:22,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923111653] [2024-06-04 14:17:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:22,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:22,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:22,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923111653] [2024-06-04 14:17:22,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923111653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:22,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:22,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:17:22,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641126439] [2024-06-04 14:17:22,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:22,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:17:22,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:22,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:17:22,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:17:22,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 14:17:22,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:22,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:22,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 14:17:22,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:23,073 INFO L124 PetriNetUnfolderBase]: 781/1325 cut-off events. [2024-06-04 14:17:23,073 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2024-06-04 14:17:23,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2969 conditions, 1325 events. 781/1325 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6749 event pairs, 376 based on Foata normal form. 5/1321 useless extension candidates. Maximal degree in co-relation 2954. Up to 1146 conditions per place. [2024-06-04 14:17:23,081 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 44 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-04 14:17:23,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 62 transitions, 284 flow [2024-06-04 14:17:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:17:23,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:17:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-04 14:17:23,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6726190476190477 [2024-06-04 14:17:23,084 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 113 transitions. [2024-06-04 14:17:23,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 62 transitions, 284 flow [2024-06-04 14:17:23,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:17:23,087 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 173 flow [2024-06-04 14:17:23,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-06-04 14:17:23,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-04 14:17:23,088 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 173 flow [2024-06-04 14:17:23,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:23,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:23,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:23,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:17:23,091 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:23,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:23,094 INFO L85 PathProgramCache]: Analyzing trace with hash -263580670, now seen corresponding path program 1 times [2024-06-04 14:17:23,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:23,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193506442] [2024-06-04 14:17:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:23,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:23,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:23,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193506442] [2024-06-04 14:17:23,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193506442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:23,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:23,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:17:23,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772577803] [2024-06-04 14:17:23,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:23,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:17:23,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:23,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:17:23,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:17:23,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 14:17:23,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:23,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:23,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 14:17:23,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:23,479 INFO L124 PetriNetUnfolderBase]: 789/1357 cut-off events. [2024-06-04 14:17:23,479 INFO L125 PetriNetUnfolderBase]: For 893/934 co-relation queries the response was YES. [2024-06-04 14:17:23,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3596 conditions, 1357 events. 789/1357 cut-off events. For 893/934 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7079 event pairs, 265 based on Foata normal form. 15/1360 useless extension candidates. Maximal degree in co-relation 3578. Up to 1114 conditions per place. [2024-06-04 14:17:23,485 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-04 14:17:23,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 405 flow [2024-06-04 14:17:23,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:17:23,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:17:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-04 14:17:23,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-04 14:17:23,487 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 173 flow. Second operand 5 states and 140 transitions. [2024-06-04 14:17:23,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 405 flow [2024-06-04 14:17:23,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 403 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-04 14:17:23,489 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 248 flow [2024-06-04 14:17:23,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-06-04 14:17:23,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-04 14:17:23,490 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 248 flow [2024-06-04 14:17:23,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:23,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:23,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:23,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:17:23,491 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:23,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash -364981210, now seen corresponding path program 1 times [2024-06-04 14:17:23,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:23,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769500226] [2024-06-04 14:17:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:23,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:23,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:23,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769500226] [2024-06-04 14:17:23,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769500226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:23,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:23,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:17:23,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921665116] [2024-06-04 14:17:23,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:23,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:17:23,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:23,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:17:23,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:17:23,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 14:17:23,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:23,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:23,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 14:17:23,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:23,776 INFO L124 PetriNetUnfolderBase]: 773/1297 cut-off events. [2024-06-04 14:17:23,777 INFO L125 PetriNetUnfolderBase]: For 1645/1660 co-relation queries the response was YES. [2024-06-04 14:17:23,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3948 conditions, 1297 events. 773/1297 cut-off events. For 1645/1660 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6615 event pairs, 312 based on Foata normal form. 15/1305 useless extension candidates. Maximal degree in co-relation 3927. Up to 1140 conditions per place. [2024-06-04 14:17:23,784 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-04 14:17:23,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 401 flow [2024-06-04 14:17:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:17:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:17:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-04 14:17:23,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-04 14:17:23,786 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 248 flow. Second operand 4 states and 107 transitions. [2024-06-04 14:17:23,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 401 flow [2024-06-04 14:17:23,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 387 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-04 14:17:23,789 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 287 flow [2024-06-04 14:17:23,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-04 14:17:23,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-04 14:17:23,790 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 287 flow [2024-06-04 14:17:23,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:23,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:23,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:23,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:17:23,791 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:23,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:23,791 INFO L85 PathProgramCache]: Analyzing trace with hash -848364989, now seen corresponding path program 1 times [2024-06-04 14:17:23,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:23,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837987515] [2024-06-04 14:17:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:23,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:23,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:23,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837987515] [2024-06-04 14:17:23,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837987515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:23,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:23,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:23,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469608312] [2024-06-04 14:17:23,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:23,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:23,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:23,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:23,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:23,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 14:17:23,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:23,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:23,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 14:17:23,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:24,124 INFO L124 PetriNetUnfolderBase]: 781/1330 cut-off events. [2024-06-04 14:17:24,124 INFO L125 PetriNetUnfolderBase]: For 2266/2340 co-relation queries the response was YES. [2024-06-04 14:17:24,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4191 conditions, 1330 events. 781/1330 cut-off events. For 2266/2340 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6821 event pairs, 210 based on Foata normal form. 30/1350 useless extension candidates. Maximal degree in co-relation 4166. Up to 1064 conditions per place. [2024-06-04 14:17:24,131 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 56 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-04 14:17:24,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 537 flow [2024-06-04 14:17:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:24,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:24,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-04 14:17:24,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-04 14:17:24,133 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 287 flow. Second operand 6 states and 162 transitions. [2024-06-04 14:17:24,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 537 flow [2024-06-04 14:17:24,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 84 transitions, 527 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-04 14:17:24,136 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 343 flow [2024-06-04 14:17:24,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-04 14:17:24,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-04 14:17:24,137 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 343 flow [2024-06-04 14:17:24,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:24,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:24,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:24,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:17:24,138 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:24,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:24,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1570485163, now seen corresponding path program 1 times [2024-06-04 14:17:24,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:24,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6362875] [2024-06-04 14:17:24,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:24,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:24,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:24,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6362875] [2024-06-04 14:17:24,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6362875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:24,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:24,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:17:24,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109864170] [2024-06-04 14:17:24,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:24,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:17:24,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:24,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:17:24,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:17:24,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:24,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:24,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:24,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:24,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:24,423 INFO L124 PetriNetUnfolderBase]: 955/1562 cut-off events. [2024-06-04 14:17:24,423 INFO L125 PetriNetUnfolderBase]: For 3564/3564 co-relation queries the response was YES. [2024-06-04 14:17:24,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5352 conditions, 1562 events. 955/1562 cut-off events. For 3564/3564 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7919 event pairs, 342 based on Foata normal form. 4/1558 useless extension candidates. Maximal degree in co-relation 5325. Up to 1371 conditions per place. [2024-06-04 14:17:24,432 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 67 selfloop transitions, 15 changer transitions 0/89 dead transitions. [2024-06-04 14:17:24,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 677 flow [2024-06-04 14:17:24,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:17:24,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:17:24,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-04 14:17:24,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-04 14:17:24,433 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 343 flow. Second operand 5 states and 128 transitions. [2024-06-04 14:17:24,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 677 flow [2024-06-04 14:17:24,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 615 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:24,438 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 446 flow [2024-06-04 14:17:24,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=446, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2024-06-04 14:17:24,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-04 14:17:24,439 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 446 flow [2024-06-04 14:17:24,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:24,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:24,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:24,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:17:24,439 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:24,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:24,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1727404290, now seen corresponding path program 1 times [2024-06-04 14:17:24,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:24,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390905209] [2024-06-04 14:17:24,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:24,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:24,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:24,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390905209] [2024-06-04 14:17:24,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390905209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:24,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:24,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:17:24,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651142501] [2024-06-04 14:17:24,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:24,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:17:24,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:24,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:17:24,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:17:24,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:24,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 446 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:24,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:24,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:24,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:24,718 INFO L124 PetriNetUnfolderBase]: 966/1590 cut-off events. [2024-06-04 14:17:24,719 INFO L125 PetriNetUnfolderBase]: For 4475/4481 co-relation queries the response was YES. [2024-06-04 14:17:24,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5799 conditions, 1590 events. 966/1590 cut-off events. For 4475/4481 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8096 event pairs, 346 based on Foata normal form. 6/1588 useless extension candidates. Maximal degree in co-relation 5769. Up to 1383 conditions per place. [2024-06-04 14:17:24,728 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 69 selfloop transitions, 17 changer transitions 0/93 dead transitions. [2024-06-04 14:17:24,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 723 flow [2024-06-04 14:17:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:17:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:17:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 14:17:24,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 14:17:24,729 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 446 flow. Second operand 5 states and 126 transitions. [2024-06-04 14:17:24,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 723 flow [2024-06-04 14:17:24,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 717 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-04 14:17:24,734 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 521 flow [2024-06-04 14:17:24,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=521, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-04 14:17:24,734 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-04 14:17:24,734 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 521 flow [2024-06-04 14:17:24,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:24,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:24,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:24,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:17:24,735 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:24,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash -761795358, now seen corresponding path program 2 times [2024-06-04 14:17:24,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:24,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772037610] [2024-06-04 14:17:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:24,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:24,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:24,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772037610] [2024-06-04 14:17:24,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772037610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:24,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:24,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:17:24,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503945227] [2024-06-04 14:17:24,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:24,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:17:24,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:24,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:17:24,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:17:24,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:24,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 521 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:24,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:24,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:24,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:25,005 INFO L124 PetriNetUnfolderBase]: 961/1587 cut-off events. [2024-06-04 14:17:25,005 INFO L125 PetriNetUnfolderBase]: For 5423/5429 co-relation queries the response was YES. [2024-06-04 14:17:25,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6026 conditions, 1587 events. 961/1587 cut-off events. For 5423/5429 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8071 event pairs, 343 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 5992. Up to 1378 conditions per place. [2024-06-04 14:17:25,016 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 20 changer transitions 0/95 dead transitions. [2024-06-04 14:17:25,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 760 flow [2024-06-04 14:17:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:17:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:17:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-04 14:17:25,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-04 14:17:25,018 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 521 flow. Second operand 5 states and 129 transitions. [2024-06-04 14:17:25,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 760 flow [2024-06-04 14:17:25,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 741 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-04 14:17:25,024 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 580 flow [2024-06-04 14:17:25,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=580, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-04 14:17:25,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-04 14:17:25,025 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 580 flow [2024-06-04 14:17:25,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:25,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:25,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:25,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:17:25,026 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:25,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:25,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1702746890, now seen corresponding path program 1 times [2024-06-04 14:17:25,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:25,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304154714] [2024-06-04 14:17:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:25,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:25,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:25,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304154714] [2024-06-04 14:17:25,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304154714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:25,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:25,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:25,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778107189] [2024-06-04 14:17:25,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:25,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:25,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:25,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:25,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:25,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 580 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:25,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:25,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:25,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:25,355 INFO L124 PetriNetUnfolderBase]: 970/1591 cut-off events. [2024-06-04 14:17:25,355 INFO L125 PetriNetUnfolderBase]: For 6620/6620 co-relation queries the response was YES. [2024-06-04 14:17:25,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6234 conditions, 1591 events. 970/1591 cut-off events. For 6620/6620 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8073 event pairs, 316 based on Foata normal form. 8/1591 useless extension candidates. Maximal degree in co-relation 6197. Up to 1357 conditions per place. [2024-06-04 14:17:25,365 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 70 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2024-06-04 14:17:25,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 834 flow [2024-06-04 14:17:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 14:17:25,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 14:17:25,366 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 580 flow. Second operand 6 states and 148 transitions. [2024-06-04 14:17:25,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 834 flow [2024-06-04 14:17:25,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 100 transitions, 810 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-04 14:17:25,375 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 634 flow [2024-06-04 14:17:25,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2024-06-04 14:17:25,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-04 14:17:25,376 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 634 flow [2024-06-04 14:17:25,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:25,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:25,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:25,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:17:25,377 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:25,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:25,377 INFO L85 PathProgramCache]: Analyzing trace with hash -512207174, now seen corresponding path program 1 times [2024-06-04 14:17:25,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:25,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404707694] [2024-06-04 14:17:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:25,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:25,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:25,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404707694] [2024-06-04 14:17:25,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404707694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:25,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:25,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:25,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570390936] [2024-06-04 14:17:25,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:25,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:25,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:25,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:25,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:25,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 14:17:25,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 634 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 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) [2024-06-04 14:17:25,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:25,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 14:17:25,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:25,717 INFO L124 PetriNetUnfolderBase]: 925/1553 cut-off events. [2024-06-04 14:17:25,718 INFO L125 PetriNetUnfolderBase]: For 8783/8816 co-relation queries the response was YES. [2024-06-04 14:17:25,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6490 conditions, 1553 events. 925/1553 cut-off events. For 8783/8816 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8064 event pairs, 286 based on Foata normal form. 33/1535 useless extension candidates. Maximal degree in co-relation 6451. Up to 1266 conditions per place. [2024-06-04 14:17:25,726 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2024-06-04 14:17:25,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 110 transitions, 944 flow [2024-06-04 14:17:25,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-04 14:17:25,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-04 14:17:25,728 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 634 flow. Second operand 6 states and 160 transitions. [2024-06-04 14:17:25,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 110 transitions, 944 flow [2024-06-04 14:17:25,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 110 transitions, 890 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:25,735 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 656 flow [2024-06-04 14:17:25,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=656, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-04 14:17:25,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-04 14:17:25,736 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 656 flow [2024-06-04 14:17:25,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 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) [2024-06-04 14:17:25,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:25,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:25,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:17:25,737 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:25,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:25,737 INFO L85 PathProgramCache]: Analyzing trace with hash 727180166, now seen corresponding path program 2 times [2024-06-04 14:17:25,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:25,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932393174] [2024-06-04 14:17:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:25,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:25,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:25,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932393174] [2024-06-04 14:17:25,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932393174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:25,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:25,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:17:25,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537808124] [2024-06-04 14:17:25,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:25,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:17:25,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:25,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:17:25,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:17:25,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 14:17:25,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 656 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:25,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:25,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 14:17:25,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:26,006 INFO L124 PetriNetUnfolderBase]: 934/1551 cut-off events. [2024-06-04 14:17:26,022 INFO L125 PetriNetUnfolderBase]: For 9905/9933 co-relation queries the response was YES. [2024-06-04 14:17:26,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6635 conditions, 1551 events. 934/1551 cut-off events. For 9905/9933 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8089 event pairs, 296 based on Foata normal form. 21/1513 useless extension candidates. Maximal degree in co-relation 6595. Up to 1283 conditions per place. [2024-06-04 14:17:26,030 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-04 14:17:26,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 98 transitions, 860 flow [2024-06-04 14:17:26,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:17:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:17:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-04 14:17:26,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 14:17:26,031 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 656 flow. Second operand 5 states and 130 transitions. [2024-06-04 14:17:26,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 98 transitions, 860 flow [2024-06-04 14:17:26,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 804 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:26,039 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 661 flow [2024-06-04 14:17:26,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=661, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-06-04 14:17:26,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-04 14:17:26,040 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 661 flow [2024-06-04 14:17:26,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:26,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:26,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:26,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:17:26,041 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:26,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:26,041 INFO L85 PathProgramCache]: Analyzing trace with hash 433892943, now seen corresponding path program 1 times [2024-06-04 14:17:26,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:26,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416068807] [2024-06-04 14:17:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:26,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:26,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:26,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416068807] [2024-06-04 14:17:26,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416068807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:26,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:26,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:26,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260711579] [2024-06-04 14:17:26,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:26,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:26,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:26,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:26,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:26,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:26,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 661 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:26,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:26,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:26,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:26,394 INFO L124 PetriNetUnfolderBase]: 1005/1661 cut-off events. [2024-06-04 14:17:26,394 INFO L125 PetriNetUnfolderBase]: For 10378/10384 co-relation queries the response was YES. [2024-06-04 14:17:26,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6980 conditions, 1661 events. 1005/1661 cut-off events. For 10378/10384 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8502 event pairs, 317 based on Foata normal form. 2/1656 useless extension candidates. Maximal degree in co-relation 6939. Up to 1356 conditions per place. [2024-06-04 14:17:26,404 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2024-06-04 14:17:26,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 1185 flow [2024-06-04 14:17:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 14:17:26,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-04 14:17:26,405 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 661 flow. Second operand 7 states and 181 transitions. [2024-06-04 14:17:26,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 1185 flow [2024-06-04 14:17:26,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 133 transitions, 1104 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:26,417 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 785 flow [2024-06-04 14:17:26,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=785, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-04 14:17:26,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-04 14:17:26,418 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 785 flow [2024-06-04 14:17:26,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:26,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:26,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:26,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:17:26,418 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:26,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:26,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1067956841, now seen corresponding path program 2 times [2024-06-04 14:17:26,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:26,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464448370] [2024-06-04 14:17:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:26,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:26,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:26,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464448370] [2024-06-04 14:17:26,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464448370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:26,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:26,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:26,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071427051] [2024-06-04 14:17:26,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:26,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:26,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:26,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:26,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:26,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:26,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 785 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:26,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:26,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:26,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:26,749 INFO L124 PetriNetUnfolderBase]: 1016/1663 cut-off events. [2024-06-04 14:17:26,749 INFO L125 PetriNetUnfolderBase]: For 12195/12195 co-relation queries the response was YES. [2024-06-04 14:17:26,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7519 conditions, 1663 events. 1016/1663 cut-off events. For 12195/12195 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8484 event pairs, 327 based on Foata normal form. 2/1652 useless extension candidates. Maximal degree in co-relation 7475. Up to 1368 conditions per place. [2024-06-04 14:17:26,761 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 36 changer transitions 0/127 dead transitions. [2024-06-04 14:17:26,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 127 transitions, 1219 flow [2024-06-04 14:17:26,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 14:17:26,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-04 14:17:26,763 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 785 flow. Second operand 6 states and 154 transitions. [2024-06-04 14:17:26,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 127 transitions, 1219 flow [2024-06-04 14:17:26,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 127 transitions, 1191 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-04 14:17:26,779 INFO L231 Difference]: Finished difference. Result has 93 places, 103 transitions, 888 flow [2024-06-04 14:17:26,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=888, PETRI_PLACES=93, PETRI_TRANSITIONS=103} [2024-06-04 14:17:26,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-04 14:17:26,780 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 103 transitions, 888 flow [2024-06-04 14:17:26,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:26,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:26,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:26,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:17:26,781 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:26,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:26,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2100041855, now seen corresponding path program 3 times [2024-06-04 14:17:26,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:26,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222104162] [2024-06-04 14:17:26,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:26,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:26,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:26,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222104162] [2024-06-04 14:17:26,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222104162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:26,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:26,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:26,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234293263] [2024-06-04 14:17:26,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:26,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:26,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:26,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:26,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:26,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:26,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 103 transitions, 888 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:26,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:26,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:26,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:27,120 INFO L124 PetriNetUnfolderBase]: 1011/1656 cut-off events. [2024-06-04 14:17:27,120 INFO L125 PetriNetUnfolderBase]: For 13743/13743 co-relation queries the response was YES. [2024-06-04 14:17:27,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7765 conditions, 1656 events. 1011/1656 cut-off events. For 13743/13743 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8468 event pairs, 327 based on Foata normal form. 2/1645 useless extension candidates. Maximal degree in co-relation 7717. Up to 1363 conditions per place. [2024-06-04 14:17:27,131 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 83 selfloop transitions, 35 changer transitions 0/125 dead transitions. [2024-06-04 14:17:27,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 125 transitions, 1233 flow [2024-06-04 14:17:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 14:17:27,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-04 14:17:27,132 INFO L175 Difference]: Start difference. First operand has 93 places, 103 transitions, 888 flow. Second operand 6 states and 152 transitions. [2024-06-04 14:17:27,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 125 transitions, 1233 flow [2024-06-04 14:17:27,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 125 transitions, 1176 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-04 14:17:27,149 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 909 flow [2024-06-04 14:17:27,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=909, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-06-04 14:17:27,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-04 14:17:27,150 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 909 flow [2024-06-04 14:17:27,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:27,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:27,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:27,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:17:27,151 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:27,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:27,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1484241943, now seen corresponding path program 4 times [2024-06-04 14:17:27,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:27,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466149573] [2024-06-04 14:17:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:27,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:27,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:27,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466149573] [2024-06-04 14:17:27,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466149573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:27,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:27,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:27,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585811600] [2024-06-04 14:17:27,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:27,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:27,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:27,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:27,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:27,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:27,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 909 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:27,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:27,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:27,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:27,508 INFO L124 PetriNetUnfolderBase]: 1022/1697 cut-off events. [2024-06-04 14:17:27,509 INFO L125 PetriNetUnfolderBase]: For 15762/15768 co-relation queries the response was YES. [2024-06-04 14:17:27,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8004 conditions, 1697 events. 1022/1697 cut-off events. For 15762/15768 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8779 event pairs, 329 based on Foata normal form. 2/1691 useless extension candidates. Maximal degree in co-relation 7955. Up to 1375 conditions per place. [2024-06-04 14:17:27,519 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 88 selfloop transitions, 39 changer transitions 0/134 dead transitions. [2024-06-04 14:17:27,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 134 transitions, 1317 flow [2024-06-04 14:17:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-04 14:17:27,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-04 14:17:27,520 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 909 flow. Second operand 6 states and 158 transitions. [2024-06-04 14:17:27,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 134 transitions, 1317 flow [2024-06-04 14:17:27,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 1217 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 14:17:27,539 INFO L231 Difference]: Finished difference. Result has 99 places, 107 transitions, 936 flow [2024-06-04 14:17:27,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=936, PETRI_PLACES=99, PETRI_TRANSITIONS=107} [2024-06-04 14:17:27,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-04 14:17:27,540 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 107 transitions, 936 flow [2024-06-04 14:17:27,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:27,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:27,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:27,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:17:27,541 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:27,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:27,541 INFO L85 PathProgramCache]: Analyzing trace with hash -52293399, now seen corresponding path program 5 times [2024-06-04 14:17:27,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:27,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136039245] [2024-06-04 14:17:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:27,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:27,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:27,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136039245] [2024-06-04 14:17:27,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136039245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:27,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:27,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:27,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639228273] [2024-06-04 14:17:27,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:27,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:27,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:27,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:27,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:27,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:27,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 936 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:27,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:27,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:27,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:27,886 INFO L124 PetriNetUnfolderBase]: 1033/1708 cut-off events. [2024-06-04 14:17:27,886 INFO L125 PetriNetUnfolderBase]: For 17704/17710 co-relation queries the response was YES. [2024-06-04 14:17:27,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8261 conditions, 1708 events. 1033/1708 cut-off events. For 17704/17710 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8865 event pairs, 331 based on Foata normal form. 6/1702 useless extension candidates. Maximal degree in co-relation 8211. Up to 1387 conditions per place. [2024-06-04 14:17:27,896 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 84 selfloop transitions, 41 changer transitions 0/132 dead transitions. [2024-06-04 14:17:27,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 132 transitions, 1336 flow [2024-06-04 14:17:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:27,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:27,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 14:17:27,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 14:17:27,897 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 936 flow. Second operand 6 states and 149 transitions. [2024-06-04 14:17:27,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 132 transitions, 1336 flow [2024-06-04 14:17:27,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 132 transitions, 1248 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:27,915 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 976 flow [2024-06-04 14:17:27,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=976, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-06-04 14:17:27,916 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-04 14:17:27,916 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 976 flow [2024-06-04 14:17:27,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:27,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:27,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:27,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:17:27,917 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:27,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:27,917 INFO L85 PathProgramCache]: Analyzing trace with hash -308793909, now seen corresponding path program 6 times [2024-06-04 14:17:27,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:27,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465642122] [2024-06-04 14:17:27,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:27,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:28,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:28,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465642122] [2024-06-04 14:17:28,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465642122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:28,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:28,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:28,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381072269] [2024-06-04 14:17:28,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:28,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:28,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:28,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:28,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:28,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:28,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 976 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:28,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:28,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:28,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:28,218 INFO L124 PetriNetUnfolderBase]: 1028/1711 cut-off events. [2024-06-04 14:17:28,219 INFO L125 PetriNetUnfolderBase]: For 18813/18819 co-relation queries the response was YES. [2024-06-04 14:17:28,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8314 conditions, 1711 events. 1028/1711 cut-off events. For 18813/18819 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8837 event pairs, 329 based on Foata normal form. 2/1705 useless extension candidates. Maximal degree in co-relation 8263. Up to 1382 conditions per place. [2024-06-04 14:17:28,229 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 42 changer transitions 0/133 dead transitions. [2024-06-04 14:17:28,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 1284 flow [2024-06-04 14:17:28,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-04 14:17:28,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-04 14:17:28,231 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 976 flow. Second operand 6 states and 153 transitions. [2024-06-04 14:17:28,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 1284 flow [2024-06-04 14:17:28,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 133 transitions, 1236 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-04 14:17:28,254 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 1020 flow [2024-06-04 14:17:28,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1020, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-06-04 14:17:28,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-04 14:17:28,255 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 1020 flow [2024-06-04 14:17:28,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:28,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:28,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:28,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:17:28,255 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:28,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:28,256 INFO L85 PathProgramCache]: Analyzing trace with hash -52285463, now seen corresponding path program 1 times [2024-06-04 14:17:28,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:28,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127412659] [2024-06-04 14:17:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:28,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:28,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:28,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127412659] [2024-06-04 14:17:28,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127412659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:28,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:28,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:28,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056415160] [2024-06-04 14:17:28,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:28,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:28,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:28,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:28,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:28,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:28,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 1020 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:28,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:28,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:28,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:28,608 INFO L124 PetriNetUnfolderBase]: 1045/1738 cut-off events. [2024-06-04 14:17:28,609 INFO L125 PetriNetUnfolderBase]: For 21715/21721 co-relation queries the response was YES. [2024-06-04 14:17:28,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8563 conditions, 1738 events. 1045/1738 cut-off events. For 21715/21721 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9056 event pairs, 317 based on Foata normal form. 8/1738 useless extension candidates. Maximal degree in co-relation 8510. Up to 1487 conditions per place. [2024-06-04 14:17:28,621 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 106 selfloop transitions, 20 changer transitions 0/133 dead transitions. [2024-06-04 14:17:28,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 133 transitions, 1338 flow [2024-06-04 14:17:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 14:17:28,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-04 14:17:28,622 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 1020 flow. Second operand 6 states and 145 transitions. [2024-06-04 14:17:28,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 133 transitions, 1338 flow [2024-06-04 14:17:28,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 133 transitions, 1248 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:28,649 INFO L231 Difference]: Finished difference. Result has 107 places, 113 transitions, 997 flow [2024-06-04 14:17:28,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=101, 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=6, PETRI_FLOW=997, PETRI_PLACES=107, PETRI_TRANSITIONS=113} [2024-06-04 14:17:28,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-04 14:17:28,649 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 113 transitions, 997 flow [2024-06-04 14:17:28,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:28,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:28,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:28,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:17:28,650 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:28,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:28,651 INFO L85 PathProgramCache]: Analyzing trace with hash -42762263, now seen corresponding path program 2 times [2024-06-04 14:17:28,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:28,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708568823] [2024-06-04 14:17:28,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:28,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:28,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:28,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708568823] [2024-06-04 14:17:28,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708568823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:28,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:28,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:28,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132460283] [2024-06-04 14:17:28,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:28,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:28,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:28,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:28,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:28,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:28,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 113 transitions, 997 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:28,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:28,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:28,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:28,961 INFO L124 PetriNetUnfolderBase]: 1062/1764 cut-off events. [2024-06-04 14:17:28,961 INFO L125 PetriNetUnfolderBase]: For 24140/24146 co-relation queries the response was YES. [2024-06-04 14:17:28,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 1764 events. 1062/1764 cut-off events. For 24140/24146 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9231 event pairs, 288 based on Foata normal form. 8/1764 useless extension candidates. Maximal degree in co-relation 8778. Up to 1431 conditions per place. [2024-06-04 14:17:28,972 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 107 selfloop transitions, 26 changer transitions 0/140 dead transitions. [2024-06-04 14:17:28,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 140 transitions, 1431 flow [2024-06-04 14:17:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:28,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 14:17:28,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 14:17:28,974 INFO L175 Difference]: Start difference. First operand has 107 places, 113 transitions, 997 flow. Second operand 6 states and 148 transitions. [2024-06-04 14:17:28,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 140 transitions, 1431 flow [2024-06-04 14:17:28,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 140 transitions, 1382 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:28,997 INFO L231 Difference]: Finished difference. Result has 109 places, 117 transitions, 1051 flow [2024-06-04 14:17:28,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1051, PETRI_PLACES=109, PETRI_TRANSITIONS=117} [2024-06-04 14:17:28,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-04 14:17:28,997 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 117 transitions, 1051 flow [2024-06-04 14:17:28,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:28,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:28,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:28,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:17:28,998 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:28,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:28,998 INFO L85 PathProgramCache]: Analyzing trace with hash -308785973, now seen corresponding path program 3 times [2024-06-04 14:17:28,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:28,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894227599] [2024-06-04 14:17:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:28,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:29,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:29,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894227599] [2024-06-04 14:17:29,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894227599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:29,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:29,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:29,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20180660] [2024-06-04 14:17:29,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:29,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:29,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:29,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:29,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:29,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:29,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 117 transitions, 1051 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:29,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:29,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:29,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:29,311 INFO L124 PetriNetUnfolderBase]: 1054/1757 cut-off events. [2024-06-04 14:17:29,311 INFO L125 PetriNetUnfolderBase]: For 25518/25524 co-relation queries the response was YES. [2024-06-04 14:17:29,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8949 conditions, 1757 events. 1054/1757 cut-off events. For 25518/25524 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9167 event pairs, 312 based on Foata normal form. 4/1754 useless extension candidates. Maximal degree in co-relation 8894. Up to 1502 conditions per place. [2024-06-04 14:17:29,322 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 111 selfloop transitions, 22 changer transitions 0/140 dead transitions. [2024-06-04 14:17:29,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 140 transitions, 1375 flow [2024-06-04 14:17:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 14:17:29,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 14:17:29,324 INFO L175 Difference]: Start difference. First operand has 109 places, 117 transitions, 1051 flow. Second operand 6 states and 150 transitions. [2024-06-04 14:17:29,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 140 transitions, 1375 flow [2024-06-04 14:17:29,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 140 transitions, 1332 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-04 14:17:29,354 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 1059 flow [2024-06-04 14:17:29,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1059, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2024-06-04 14:17:29,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-04 14:17:29,355 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 1059 flow [2024-06-04 14:17:29,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:29,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:29,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:29,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:17:29,355 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:29,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:29,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1791327585, now seen corresponding path program 1 times [2024-06-04 14:17:29,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:29,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782068934] [2024-06-04 14:17:29,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:29,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:29,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:29,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782068934] [2024-06-04 14:17:29,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782068934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:29,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:29,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:29,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36908745] [2024-06-04 14:17:29,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:29,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:29,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:29,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:29,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:29,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 14:17:29,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 1059 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-04 14:17:29,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:29,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 14:17:29,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:29,787 INFO L124 PetriNetUnfolderBase]: 1055/1778 cut-off events. [2024-06-04 14:17:29,787 INFO L125 PetriNetUnfolderBase]: For 31076/31098 co-relation queries the response was YES. [2024-06-04 14:17:29,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9364 conditions, 1778 events. 1055/1778 cut-off events. For 31076/31098 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9521 event pairs, 183 based on Foata normal form. 10/1730 useless extension candidates. Maximal degree in co-relation 9307. Up to 1341 conditions per place. [2024-06-04 14:17:29,798 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 91 selfloop transitions, 40 changer transitions 0/158 dead transitions. [2024-06-04 14:17:29,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 158 transitions, 1525 flow [2024-06-04 14:17:29,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:17:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:17:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-04 14:17:29,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-04 14:17:29,800 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 1059 flow. Second operand 8 states and 205 transitions. [2024-06-04 14:17:29,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 158 transitions, 1525 flow [2024-06-04 14:17:29,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 158 transitions, 1476 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:29,834 INFO L231 Difference]: Finished difference. Result has 117 places, 121 transitions, 1133 flow [2024-06-04 14:17:29,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1133, PETRI_PLACES=117, PETRI_TRANSITIONS=121} [2024-06-04 14:17:29,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-04 14:17:29,834 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 121 transitions, 1133 flow [2024-06-04 14:17:29,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-04 14:17:29,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:29,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:29,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:17:29,835 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:29,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:29,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1794184545, now seen corresponding path program 2 times [2024-06-04 14:17:29,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:29,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305147008] [2024-06-04 14:17:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:29,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:29,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:29,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305147008] [2024-06-04 14:17:29,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305147008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:29,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:29,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:29,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435970951] [2024-06-04 14:17:29,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:29,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:29,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:29,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:29,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:30,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 14:17:30,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 121 transitions, 1133 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-04 14:17:30,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:30,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 14:17:30,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:30,261 INFO L124 PetriNetUnfolderBase]: 1043/1758 cut-off events. [2024-06-04 14:17:30,261 INFO L125 PetriNetUnfolderBase]: For 33127/33154 co-relation queries the response was YES. [2024-06-04 14:17:30,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9503 conditions, 1758 events. 1043/1758 cut-off events. For 33127/33154 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9421 event pairs, 250 based on Foata normal form. 8/1707 useless extension candidates. Maximal degree in co-relation 9445. Up to 1409 conditions per place. [2024-06-04 14:17:30,274 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 89 selfloop transitions, 35 changer transitions 0/151 dead transitions. [2024-06-04 14:17:30,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 151 transitions, 1457 flow [2024-06-04 14:17:30,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:30,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-04 14:17:30,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-04 14:17:30,277 INFO L175 Difference]: Start difference. First operand has 117 places, 121 transitions, 1133 flow. Second operand 7 states and 180 transitions. [2024-06-04 14:17:30,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 151 transitions, 1457 flow [2024-06-04 14:17:30,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 151 transitions, 1394 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:30,315 INFO L231 Difference]: Finished difference. Result has 120 places, 121 transitions, 1148 flow [2024-06-04 14:17:30,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1148, PETRI_PLACES=120, PETRI_TRANSITIONS=121} [2024-06-04 14:17:30,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-04 14:17:30,316 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 121 transitions, 1148 flow [2024-06-04 14:17:30,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-04 14:17:30,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:30,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:30,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:17:30,317 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:30,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:30,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1545242789, now seen corresponding path program 3 times [2024-06-04 14:17:30,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:30,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856528924] [2024-06-04 14:17:30,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:30,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:30,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:30,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856528924] [2024-06-04 14:17:30,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856528924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:30,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:30,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:30,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096282754] [2024-06-04 14:17:30,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:30,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:30,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:30,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:30,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 14:17:30,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 121 transitions, 1148 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:30,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:30,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 14:17:30,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:30,658 INFO L124 PetriNetUnfolderBase]: 1035/1730 cut-off events. [2024-06-04 14:17:30,658 INFO L125 PetriNetUnfolderBase]: For 34715/34736 co-relation queries the response was YES. [2024-06-04 14:17:30,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9496 conditions, 1730 events. 1035/1730 cut-off events. For 34715/34736 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9217 event pairs, 255 based on Foata normal form. 6/1667 useless extension candidates. Maximal degree in co-relation 9436. Up to 1397 conditions per place. [2024-06-04 14:17:30,670 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 81 selfloop transitions, 35 changer transitions 0/143 dead transitions. [2024-06-04 14:17:30,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 143 transitions, 1450 flow [2024-06-04 14:17:30,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:30,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 14:17:30,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-04 14:17:30,671 INFO L175 Difference]: Start difference. First operand has 120 places, 121 transitions, 1148 flow. Second operand 6 states and 152 transitions. [2024-06-04 14:17:30,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 143 transitions, 1450 flow [2024-06-04 14:17:30,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 143 transitions, 1371 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 14:17:30,704 INFO L231 Difference]: Finished difference. Result has 120 places, 123 transitions, 1171 flow [2024-06-04 14:17:30,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1171, PETRI_PLACES=120, PETRI_TRANSITIONS=123} [2024-06-04 14:17:30,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-04 14:17:30,705 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 123 transitions, 1171 flow [2024-06-04 14:17:30,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:30,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:30,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:30,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:17:30,706 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:30,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:30,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1063539590, now seen corresponding path program 1 times [2024-06-04 14:17:30,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:30,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777975458] [2024-06-04 14:17:30,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:30,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:30,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:30,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777975458] [2024-06-04 14:17:30,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777975458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:30,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:30,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:30,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208611546] [2024-06-04 14:17:30,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:30,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:30,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:30,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:30,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:30,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:30,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 123 transitions, 1171 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:30,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:30,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:30,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:31,034 INFO L124 PetriNetUnfolderBase]: 1119/1867 cut-off events. [2024-06-04 14:17:31,034 INFO L125 PetriNetUnfolderBase]: For 33849/33855 co-relation queries the response was YES. [2024-06-04 14:17:31,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10083 conditions, 1867 events. 1119/1867 cut-off events. For 33849/33855 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9842 event pairs, 280 based on Foata normal form. 6/1868 useless extension candidates. Maximal degree in co-relation 10022. Up to 1590 conditions per place. [2024-06-04 14:17:31,048 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 116 selfloop transitions, 34 changer transitions 0/157 dead transitions. [2024-06-04 14:17:31,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 157 transitions, 1770 flow [2024-06-04 14:17:31,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 14:17:31,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 14:17:31,050 INFO L175 Difference]: Start difference. First operand has 120 places, 123 transitions, 1171 flow. Second operand 6 states and 149 transitions. [2024-06-04 14:17:31,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 157 transitions, 1770 flow [2024-06-04 14:17:31,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 157 transitions, 1682 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:31,086 INFO L231 Difference]: Finished difference. Result has 124 places, 139 transitions, 1358 flow [2024-06-04 14:17:31,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1358, PETRI_PLACES=124, PETRI_TRANSITIONS=139} [2024-06-04 14:17:31,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-04 14:17:31,087 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 139 transitions, 1358 flow [2024-06-04 14:17:31,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:31,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:31,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:31,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:17:31,088 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:31,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:31,088 INFO L85 PathProgramCache]: Analyzing trace with hash -535610012, now seen corresponding path program 2 times [2024-06-04 14:17:31,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:31,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606834934] [2024-06-04 14:17:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:31,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:31,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:31,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606834934] [2024-06-04 14:17:31,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606834934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:31,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:31,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:31,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881899594] [2024-06-04 14:17:31,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:31,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:31,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:31,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:31,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:31,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:31,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 139 transitions, 1358 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:31,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:31,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:31,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:31,471 INFO L124 PetriNetUnfolderBase]: 1147/1909 cut-off events. [2024-06-04 14:17:31,471 INFO L125 PetriNetUnfolderBase]: For 36865/36865 co-relation queries the response was YES. [2024-06-04 14:17:31,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10725 conditions, 1909 events. 1147/1909 cut-off events. For 36865/36865 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10048 event pairs, 270 based on Foata normal form. 2/1908 useless extension candidates. Maximal degree in co-relation 10661. Up to 1648 conditions per place. [2024-06-04 14:17:31,484 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 34 changer transitions 0/166 dead transitions. [2024-06-04 14:17:31,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 166 transitions, 1869 flow [2024-06-04 14:17:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:17:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:17:31,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-04 14:17:31,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-04 14:17:31,486 INFO L175 Difference]: Start difference. First operand has 124 places, 139 transitions, 1358 flow. Second operand 5 states and 132 transitions. [2024-06-04 14:17:31,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 166 transitions, 1869 flow [2024-06-04 14:17:31,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 166 transitions, 1831 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-04 14:17:31,525 INFO L231 Difference]: Finished difference. Result has 130 places, 147 transitions, 1542 flow [2024-06-04 14:17:31,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1542, PETRI_PLACES=130, PETRI_TRANSITIONS=147} [2024-06-04 14:17:31,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-04 14:17:31,526 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 147 transitions, 1542 flow [2024-06-04 14:17:31,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:31,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:31,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:31,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:17:31,526 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:31,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:31,527 INFO L85 PathProgramCache]: Analyzing trace with hash -503881202, now seen corresponding path program 3 times [2024-06-04 14:17:31,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:31,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883334405] [2024-06-04 14:17:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:31,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:31,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:31,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883334405] [2024-06-04 14:17:31,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883334405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:31,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:31,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:31,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87975436] [2024-06-04 14:17:31,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:31,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:31,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:31,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:31,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:31,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:31,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 147 transitions, 1542 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:31,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:31,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:31,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:31,857 INFO L124 PetriNetUnfolderBase]: 1149/1917 cut-off events. [2024-06-04 14:17:31,857 INFO L125 PetriNetUnfolderBase]: For 40292/40298 co-relation queries the response was YES. [2024-06-04 14:17:31,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11018 conditions, 1917 events. 1149/1917 cut-off events. For 40292/40298 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10154 event pairs, 282 based on Foata normal form. 6/1918 useless extension candidates. Maximal degree in co-relation 10950. Up to 1622 conditions per place. [2024-06-04 14:17:31,915 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 115 selfloop transitions, 45 changer transitions 0/167 dead transitions. [2024-06-04 14:17:31,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 167 transitions, 2044 flow [2024-06-04 14:17:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:17:31,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:17:31,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-04 14:17:31,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 14:17:31,917 INFO L175 Difference]: Start difference. First operand has 130 places, 147 transitions, 1542 flow. Second operand 5 states and 130 transitions. [2024-06-04 14:17:31,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 167 transitions, 2044 flow [2024-06-04 14:17:31,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 167 transitions, 1999 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-04 14:17:31,977 INFO L231 Difference]: Finished difference. Result has 133 places, 150 transitions, 1639 flow [2024-06-04 14:17:31,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1639, PETRI_PLACES=133, PETRI_TRANSITIONS=150} [2024-06-04 14:17:31,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-04 14:17:31,978 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 150 transitions, 1639 flow [2024-06-04 14:17:31,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:31,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:31,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:31,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:17:31,978 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:31,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:31,979 INFO L85 PathProgramCache]: Analyzing trace with hash 236855980, now seen corresponding path program 1 times [2024-06-04 14:17:31,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:31,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080418040] [2024-06-04 14:17:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:31,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:32,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:32,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080418040] [2024-06-04 14:17:32,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080418040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:32,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:32,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:32,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646923783] [2024-06-04 14:17:32,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:32,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:32,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:32,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:32,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:32,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:32,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 150 transitions, 1639 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:32,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:32,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:32,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:32,325 INFO L124 PetriNetUnfolderBase]: 1167/1944 cut-off events. [2024-06-04 14:17:32,325 INFO L125 PetriNetUnfolderBase]: For 44384/44384 co-relation queries the response was YES. [2024-06-04 14:17:32,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11360 conditions, 1944 events. 1167/1944 cut-off events. For 44384/44384 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10349 event pairs, 292 based on Foata normal form. 2/1938 useless extension candidates. Maximal degree in co-relation 11291. Up to 1629 conditions per place. [2024-06-04 14:17:32,338 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 134 selfloop transitions, 38 changer transitions 0/179 dead transitions. [2024-06-04 14:17:32,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 179 transitions, 2247 flow [2024-06-04 14:17:32,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 14:17:32,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 14:17:32,339 INFO L175 Difference]: Start difference. First operand has 133 places, 150 transitions, 1639 flow. Second operand 6 states and 149 transitions. [2024-06-04 14:17:32,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 179 transitions, 2247 flow [2024-06-04 14:17:32,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 179 transitions, 2143 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-04 14:17:32,395 INFO L231 Difference]: Finished difference. Result has 136 places, 161 transitions, 1746 flow [2024-06-04 14:17:32,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1746, PETRI_PLACES=136, PETRI_TRANSITIONS=161} [2024-06-04 14:17:32,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-04 14:17:32,396 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 161 transitions, 1746 flow [2024-06-04 14:17:32,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:32,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:32,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:32,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:17:32,397 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:32,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:32,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432248, now seen corresponding path program 1 times [2024-06-04 14:17:32,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:32,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484875989] [2024-06-04 14:17:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:32,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:32,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:32,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484875989] [2024-06-04 14:17:32,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484875989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:32,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:32,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:32,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57896596] [2024-06-04 14:17:32,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:32,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:32,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:32,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:32,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:32,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 161 transitions, 1746 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:32,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:32,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:32,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:32,736 INFO L124 PetriNetUnfolderBase]: 1187/1976 cut-off events. [2024-06-04 14:17:32,736 INFO L125 PetriNetUnfolderBase]: For 45402/45402 co-relation queries the response was YES. [2024-06-04 14:17:32,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11773 conditions, 1976 events. 1187/1976 cut-off events. For 45402/45402 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10486 event pairs, 288 based on Foata normal form. 2/1971 useless extension candidates. Maximal degree in co-relation 11704. Up to 1663 conditions per place. [2024-06-04 14:17:32,749 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 125 selfloop transitions, 52 changer transitions 0/184 dead transitions. [2024-06-04 14:17:32,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 184 transitions, 2370 flow [2024-06-04 14:17:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:32,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:32,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 14:17:32,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 14:17:32,750 INFO L175 Difference]: Start difference. First operand has 136 places, 161 transitions, 1746 flow. Second operand 6 states and 146 transitions. [2024-06-04 14:17:32,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 184 transitions, 2370 flow [2024-06-04 14:17:32,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 184 transitions, 2308 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-04 14:17:32,817 INFO L231 Difference]: Finished difference. Result has 142 places, 169 transitions, 1932 flow [2024-06-04 14:17:32,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1932, PETRI_PLACES=142, PETRI_TRANSITIONS=169} [2024-06-04 14:17:32,818 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-04 14:17:32,818 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 169 transitions, 1932 flow [2024-06-04 14:17:32,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:32,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:32,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:32,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:17:32,819 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:32,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:32,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432434, now seen corresponding path program 2 times [2024-06-04 14:17:32,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:32,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030371902] [2024-06-04 14:17:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:32,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:32,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:32,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030371902] [2024-06-04 14:17:32,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030371902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:32,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:32,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:32,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272008219] [2024-06-04 14:17:32,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:32,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:32,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:32,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:32,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:32,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:32,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 169 transitions, 1932 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:32,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:32,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:32,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:33,190 INFO L124 PetriNetUnfolderBase]: 1197/1997 cut-off events. [2024-06-04 14:17:33,190 INFO L125 PetriNetUnfolderBase]: For 48702/48702 co-relation queries the response was YES. [2024-06-04 14:17:33,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12081 conditions, 1997 events. 1197/1997 cut-off events. For 48702/48702 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10684 event pairs, 280 based on Foata normal form. 2/1992 useless extension candidates. Maximal degree in co-relation 12008. Up to 1726 conditions per place. [2024-06-04 14:17:33,233 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 148 selfloop transitions, 31 changer transitions 0/186 dead transitions. [2024-06-04 14:17:33,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 186 transitions, 2360 flow [2024-06-04 14:17:33,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 14:17:33,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 14:17:33,236 INFO L175 Difference]: Start difference. First operand has 142 places, 169 transitions, 1932 flow. Second operand 6 states and 142 transitions. [2024-06-04 14:17:33,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 186 transitions, 2360 flow [2024-06-04 14:17:33,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 186 transitions, 2214 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-04 14:17:33,314 INFO L231 Difference]: Finished difference. Result has 145 places, 173 transitions, 1901 flow [2024-06-04 14:17:33,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1901, PETRI_PLACES=145, PETRI_TRANSITIONS=173} [2024-06-04 14:17:33,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-04 14:17:33,316 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 173 transitions, 1901 flow [2024-06-04 14:17:33,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:33,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:33,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:33,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:17:33,317 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:33,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:33,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1739189820, now seen corresponding path program 2 times [2024-06-04 14:17:33,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:33,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301741646] [2024-06-04 14:17:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:33,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:33,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:33,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301741646] [2024-06-04 14:17:33,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301741646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:33,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:33,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:33,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850902720] [2024-06-04 14:17:33,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:33,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:33,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:33,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:33,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:33,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:33,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 173 transitions, 1901 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:33,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:33,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:33,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:33,723 INFO L124 PetriNetUnfolderBase]: 1189/1992 cut-off events. [2024-06-04 14:17:33,724 INFO L125 PetriNetUnfolderBase]: For 49075/49075 co-relation queries the response was YES. [2024-06-04 14:17:33,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11967 conditions, 1992 events. 1189/1992 cut-off events. For 49075/49075 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10631 event pairs, 266 based on Foata normal form. 2/1991 useless extension candidates. Maximal degree in co-relation 11894. Up to 1706 conditions per place. [2024-06-04 14:17:33,739 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 146 selfloop transitions, 38 changer transitions 0/191 dead transitions. [2024-06-04 14:17:33,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 191 transitions, 2315 flow [2024-06-04 14:17:33,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:17:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:17:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-04 14:17:33,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-06-04 14:17:33,740 INFO L175 Difference]: Start difference. First operand has 145 places, 173 transitions, 1901 flow. Second operand 5 states and 131 transitions. [2024-06-04 14:17:33,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 191 transitions, 2315 flow [2024-06-04 14:17:33,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 191 transitions, 2210 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 14:17:33,813 INFO L231 Difference]: Finished difference. Result has 145 places, 173 transitions, 1896 flow [2024-06-04 14:17:33,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1896, PETRI_PLACES=145, PETRI_TRANSITIONS=173} [2024-06-04 14:17:33,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-04 14:17:33,814 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 173 transitions, 1896 flow [2024-06-04 14:17:33,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:33,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:33,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:33,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:17:33,814 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:33,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:33,815 INFO L85 PathProgramCache]: Analyzing trace with hash -497410014, now seen corresponding path program 3 times [2024-06-04 14:17:33,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:33,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134840182] [2024-06-04 14:17:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:33,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:33,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:33,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134840182] [2024-06-04 14:17:33,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134840182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:33,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:33,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:33,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470470398] [2024-06-04 14:17:33,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:33,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:33,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:33,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:33,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:33,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:33,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 173 transitions, 1896 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:33,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:33,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:33,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:34,194 INFO L124 PetriNetUnfolderBase]: 1191/1988 cut-off events. [2024-06-04 14:17:34,195 INFO L125 PetriNetUnfolderBase]: For 52884/52884 co-relation queries the response was YES. [2024-06-04 14:17:34,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12070 conditions, 1988 events. 1191/1988 cut-off events. For 52884/52884 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10657 event pairs, 280 based on Foata normal form. 2/1983 useless extension candidates. Maximal degree in co-relation 11997. Up to 1666 conditions per place. [2024-06-04 14:17:34,209 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 142 selfloop transitions, 47 changer transitions 0/196 dead transitions. [2024-06-04 14:17:34,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 196 transitions, 2420 flow [2024-06-04 14:17:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 14:17:34,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 14:17:34,210 INFO L175 Difference]: Start difference. First operand has 145 places, 173 transitions, 1896 flow. Second operand 6 states and 150 transitions. [2024-06-04 14:17:34,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 196 transitions, 2420 flow [2024-06-04 14:17:34,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 196 transitions, 2332 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:34,284 INFO L231 Difference]: Finished difference. Result has 148 places, 176 transitions, 1978 flow [2024-06-04 14:17:34,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1978, PETRI_PLACES=148, PETRI_TRANSITIONS=176} [2024-06-04 14:17:34,284 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-04 14:17:34,285 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 176 transitions, 1978 flow [2024-06-04 14:17:34,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:34,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:34,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:34,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:17:34,285 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:34,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:34,308 INFO L85 PathProgramCache]: Analyzing trace with hash -535840218, now seen corresponding path program 3 times [2024-06-04 14:17:34,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:34,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862198501] [2024-06-04 14:17:34,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:34,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:34,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:34,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862198501] [2024-06-04 14:17:34,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862198501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:34,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:34,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:34,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615430081] [2024-06-04 14:17:34,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:34,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:34,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:34,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:34,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:34,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:34,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 176 transitions, 1978 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:34,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:34,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:34,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:34,684 INFO L124 PetriNetUnfolderBase]: 1193/1992 cut-off events. [2024-06-04 14:17:34,684 INFO L125 PetriNetUnfolderBase]: For 55638/55638 co-relation queries the response was YES. [2024-06-04 14:17:34,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12283 conditions, 1992 events. 1193/1992 cut-off events. For 55638/55638 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10664 event pairs, 288 based on Foata normal form. 2/1987 useless extension candidates. Maximal degree in co-relation 12208. Up to 1676 conditions per place. [2024-06-04 14:17:34,698 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 131 selfloop transitions, 55 changer transitions 0/193 dead transitions. [2024-06-04 14:17:34,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 193 transitions, 2547 flow [2024-06-04 14:17:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:17:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:17:34,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-04 14:17:34,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-04 14:17:34,700 INFO L175 Difference]: Start difference. First operand has 148 places, 176 transitions, 1978 flow. Second operand 5 states and 127 transitions. [2024-06-04 14:17:34,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 193 transitions, 2547 flow [2024-06-04 14:17:34,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 193 transitions, 2452 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:34,780 INFO L231 Difference]: Finished difference. Result has 149 places, 179 transitions, 2052 flow [2024-06-04 14:17:34,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2052, PETRI_PLACES=149, PETRI_TRANSITIONS=179} [2024-06-04 14:17:34,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-04 14:17:34,781 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 179 transitions, 2052 flow [2024-06-04 14:17:34,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:34,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:34,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:34,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:17:34,782 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:34,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:34,782 INFO L85 PathProgramCache]: Analyzing trace with hash -535594140, now seen corresponding path program 1 times [2024-06-04 14:17:34,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:34,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403710190] [2024-06-04 14:17:34,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:34,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:34,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:34,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403710190] [2024-06-04 14:17:34,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403710190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:34,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:34,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:34,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577966941] [2024-06-04 14:17:34,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:34,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:34,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:34,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:34,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:34,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 14:17:34,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 179 transitions, 2052 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:34,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:34,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 14:17:34,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:35,116 INFO L124 PetriNetUnfolderBase]: 1129/1936 cut-off events. [2024-06-04 14:17:35,116 INFO L125 PetriNetUnfolderBase]: For 52808/52808 co-relation queries the response was YES. [2024-06-04 14:17:35,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11840 conditions, 1936 events. 1129/1936 cut-off events. For 52808/52808 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10581 event pairs, 265 based on Foata normal form. 2/1935 useless extension candidates. Maximal degree in co-relation 11764. Up to 1588 conditions per place. [2024-06-04 14:17:35,130 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 146 selfloop transitions, 10 changer transitions 0/190 dead transitions. [2024-06-04 14:17:35,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 190 transitions, 2410 flow [2024-06-04 14:17:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:17:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:17:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-04 14:17:35,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-04 14:17:35,132 INFO L175 Difference]: Start difference. First operand has 149 places, 179 transitions, 2052 flow. Second operand 4 states and 101 transitions. [2024-06-04 14:17:35,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 190 transitions, 2410 flow [2024-06-04 14:17:35,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 190 transitions, 2292 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 14:17:35,216 INFO L231 Difference]: Finished difference. Result has 150 places, 181 transitions, 1987 flow [2024-06-04 14:17:35,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1987, PETRI_PLACES=150, PETRI_TRANSITIONS=181} [2024-06-04 14:17:35,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-04 14:17:35,216 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 181 transitions, 1987 flow [2024-06-04 14:17:35,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:35,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:35,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:35,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:17:35,217 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:35,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:35,217 INFO L85 PathProgramCache]: Analyzing trace with hash -303418928, now seen corresponding path program 1 times [2024-06-04 14:17:35,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:35,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403267189] [2024-06-04 14:17:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:35,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:35,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:35,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403267189] [2024-06-04 14:17:35,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403267189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:35,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:35,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:17:35,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209481587] [2024-06-04 14:17:35,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:35,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:17:35,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:35,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:17:35,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:17:35,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:35,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 181 transitions, 1987 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:35,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:35,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:35,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:35,737 INFO L124 PetriNetUnfolderBase]: 1315/2218 cut-off events. [2024-06-04 14:17:35,737 INFO L125 PetriNetUnfolderBase]: For 64395/64401 co-relation queries the response was YES. [2024-06-04 14:17:35,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13291 conditions, 2218 events. 1315/2218 cut-off events. For 64395/64401 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12281 event pairs, 224 based on Foata normal form. 12/2223 useless extension candidates. Maximal degree in co-relation 13215. Up to 1496 conditions per place. [2024-06-04 14:17:35,753 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 47 changer transitions 0/235 dead transitions. [2024-06-04 14:17:35,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 235 transitions, 2736 flow [2024-06-04 14:17:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:17:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:17:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-04 14:17:35,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005291005291006 [2024-06-04 14:17:35,756 INFO L175 Difference]: Start difference. First operand has 150 places, 181 transitions, 1987 flow. Second operand 9 states and 227 transitions. [2024-06-04 14:17:35,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 235 transitions, 2736 flow [2024-06-04 14:17:35,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 235 transitions, 2699 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-04 14:17:35,852 INFO L231 Difference]: Finished difference. Result has 159 places, 186 transitions, 2118 flow [2024-06-04 14:17:35,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1950, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2118, PETRI_PLACES=159, PETRI_TRANSITIONS=186} [2024-06-04 14:17:35,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-04 14:17:35,853 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 186 transitions, 2118 flow [2024-06-04 14:17:35,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:35,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:35,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:35,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:17:35,853 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:35,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:35,854 INFO L85 PathProgramCache]: Analyzing trace with hash -214705298, now seen corresponding path program 2 times [2024-06-04 14:17:35,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:35,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394881907] [2024-06-04 14:17:35,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:35,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:35,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:35,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394881907] [2024-06-04 14:17:35,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394881907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:35,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:35,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:17:35,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184652554] [2024-06-04 14:17:35,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:35,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:17:35,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:35,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:17:35,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:17:36,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:36,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 186 transitions, 2118 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:36,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:36,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:36,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:36,362 INFO L124 PetriNetUnfolderBase]: 1373/2326 cut-off events. [2024-06-04 14:17:36,363 INFO L125 PetriNetUnfolderBase]: For 70693/70699 co-relation queries the response was YES. [2024-06-04 14:17:36,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14099 conditions, 2326 events. 1373/2326 cut-off events. For 70693/70699 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13085 event pairs, 329 based on Foata normal form. 16/2335 useless extension candidates. Maximal degree in co-relation 14020. Up to 1838 conditions per place. [2024-06-04 14:17:36,380 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 44 changer transitions 0/224 dead transitions. [2024-06-04 14:17:36,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 224 transitions, 2669 flow [2024-06-04 14:17:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:17:36,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:17:36,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 14:17:36,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 14:17:36,382 INFO L175 Difference]: Start difference. First operand has 159 places, 186 transitions, 2118 flow. Second operand 8 states and 200 transitions. [2024-06-04 14:17:36,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 224 transitions, 2669 flow [2024-06-04 14:17:36,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 224 transitions, 2599 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:36,479 INFO L231 Difference]: Finished difference. Result has 163 places, 187 transitions, 2160 flow [2024-06-04 14:17:36,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2160, PETRI_PLACES=163, PETRI_TRANSITIONS=187} [2024-06-04 14:17:36,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-04 14:17:36,480 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 187 transitions, 2160 flow [2024-06-04 14:17:36,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:36,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:36,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:36,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:17:36,481 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:36,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:36,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1434594660, now seen corresponding path program 3 times [2024-06-04 14:17:36,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:36,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570373601] [2024-06-04 14:17:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:36,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:36,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:36,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570373601] [2024-06-04 14:17:36,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570373601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:36,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:36,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:17:36,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093164362] [2024-06-04 14:17:36,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:36,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:17:36,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:36,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:17:36,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:17:36,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:36,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 187 transitions, 2160 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:36,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:36,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:36,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:36,946 INFO L124 PetriNetUnfolderBase]: 1414/2407 cut-off events. [2024-06-04 14:17:36,946 INFO L125 PetriNetUnfolderBase]: For 73375/73381 co-relation queries the response was YES. [2024-06-04 14:17:36,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14603 conditions, 2407 events. 1414/2407 cut-off events. For 73375/73381 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13753 event pairs, 327 based on Foata normal form. 12/2412 useless extension candidates. Maximal degree in co-relation 14522. Up to 1822 conditions per place. [2024-06-04 14:17:36,964 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 177 selfloop transitions, 46 changer transitions 0/230 dead transitions. [2024-06-04 14:17:36,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 230 transitions, 2755 flow [2024-06-04 14:17:36,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:17:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:17:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 14:17:36,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-04 14:17:36,966 INFO L175 Difference]: Start difference. First operand has 163 places, 187 transitions, 2160 flow. Second operand 8 states and 203 transitions. [2024-06-04 14:17:36,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 230 transitions, 2755 flow [2024-06-04 14:17:37,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 230 transitions, 2666 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 14:17:37,084 INFO L231 Difference]: Finished difference. Result has 166 places, 190 transitions, 2214 flow [2024-06-04 14:17:37,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2214, PETRI_PLACES=166, PETRI_TRANSITIONS=190} [2024-06-04 14:17:37,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-04 14:17:37,085 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 190 transitions, 2214 flow [2024-06-04 14:17:37,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:37,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:37,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:37,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:17:37,086 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:37,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash 201918776, now seen corresponding path program 4 times [2024-06-04 14:17:37,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:37,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492665863] [2024-06-04 14:17:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:37,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:37,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:37,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492665863] [2024-06-04 14:17:37,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492665863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:37,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:37,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:37,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189568823] [2024-06-04 14:17:37,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:37,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:37,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:37,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:37,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:37,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:37,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 190 transitions, 2214 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:37,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:37,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:37,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:37,492 INFO L124 PetriNetUnfolderBase]: 1472/2483 cut-off events. [2024-06-04 14:17:37,492 INFO L125 PetriNetUnfolderBase]: For 80471/80471 co-relation queries the response was YES. [2024-06-04 14:17:37,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15136 conditions, 2483 events. 1472/2483 cut-off events. For 80471/80471 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14273 event pairs, 370 based on Foata normal form. 16/2484 useless extension candidates. Maximal degree in co-relation 15053. Up to 2007 conditions per place. [2024-06-04 14:17:37,512 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 167 selfloop transitions, 44 changer transitions 0/218 dead transitions. [2024-06-04 14:17:37,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 218 transitions, 2726 flow [2024-06-04 14:17:37,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:17:37,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 14:17:37,513 INFO L175 Difference]: Start difference. First operand has 166 places, 190 transitions, 2214 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:17:37,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 218 transitions, 2726 flow [2024-06-04 14:17:37,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 218 transitions, 2666 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:37,646 INFO L231 Difference]: Finished difference. Result has 169 places, 191 transitions, 2265 flow [2024-06-04 14:17:37,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2265, PETRI_PLACES=169, PETRI_TRANSITIONS=191} [2024-06-04 14:17:37,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-04 14:17:37,646 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 191 transitions, 2265 flow [2024-06-04 14:17:37,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:37,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:37,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:37,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:17:37,647 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:37,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:37,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1926200768, now seen corresponding path program 5 times [2024-06-04 14:17:37,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:37,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501406571] [2024-06-04 14:17:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:37,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:37,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:37,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501406571] [2024-06-04 14:17:37,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501406571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:37,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:37,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:37,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987813587] [2024-06-04 14:17:37,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:37,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:37,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:37,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:37,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:37,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:37,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 191 transitions, 2265 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:37,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:37,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:37,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:38,084 INFO L124 PetriNetUnfolderBase]: 1530/2591 cut-off events. [2024-06-04 14:17:38,084 INFO L125 PetriNetUnfolderBase]: For 84818/84818 co-relation queries the response was YES. [2024-06-04 14:17:38,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15796 conditions, 2591 events. 1530/2591 cut-off events. For 84818/84818 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15121 event pairs, 385 based on Foata normal form. 16/2592 useless extension candidates. Maximal degree in co-relation 15711. Up to 2105 conditions per place. [2024-06-04 14:17:38,106 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 169 selfloop transitions, 43 changer transitions 0/219 dead transitions. [2024-06-04 14:17:38,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 219 transitions, 2781 flow [2024-06-04 14:17:38,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:38,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:38,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:17:38,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 14:17:38,108 INFO L175 Difference]: Start difference. First operand has 169 places, 191 transitions, 2265 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:17:38,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 219 transitions, 2781 flow [2024-06-04 14:17:38,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 219 transitions, 2688 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 14:17:38,256 INFO L231 Difference]: Finished difference. Result has 171 places, 192 transitions, 2283 flow [2024-06-04 14:17:38,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2283, PETRI_PLACES=171, PETRI_TRANSITIONS=192} [2024-06-04 14:17:38,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-04 14:17:38,257 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 192 transitions, 2283 flow [2024-06-04 14:17:38,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:38,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:38,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:38,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:17:38,258 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:38,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:38,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1926052898, now seen corresponding path program 6 times [2024-06-04 14:17:38,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:38,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538469581] [2024-06-04 14:17:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:38,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:38,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:38,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538469581] [2024-06-04 14:17:38,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538469581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:38,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:38,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:38,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273671796] [2024-06-04 14:17:38,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:38,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:38,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:38,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:38,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:38,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:38,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 192 transitions, 2283 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:38,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:38,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:38,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:38,806 INFO L124 PetriNetUnfolderBase]: 1546/2623 cut-off events. [2024-06-04 14:17:38,807 INFO L125 PetriNetUnfolderBase]: For 85436/85436 co-relation queries the response was YES. [2024-06-04 14:17:38,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15877 conditions, 2623 events. 1546/2623 cut-off events. For 85436/85436 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15371 event pairs, 376 based on Foata normal form. 12/2620 useless extension candidates. Maximal degree in co-relation 15791. Up to 1958 conditions per place. [2024-06-04 14:17:38,825 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 172 selfloop transitions, 46 changer transitions 0/225 dead transitions. [2024-06-04 14:17:38,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 225 transitions, 2847 flow [2024-06-04 14:17:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:38,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 14:17:38,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 14:17:38,826 INFO L175 Difference]: Start difference. First operand has 171 places, 192 transitions, 2283 flow. Second operand 7 states and 175 transitions. [2024-06-04 14:17:38,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 225 transitions, 2847 flow [2024-06-04 14:17:38,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 225 transitions, 2754 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 14:17:38,974 INFO L231 Difference]: Finished difference. Result has 174 places, 195 transitions, 2341 flow [2024-06-04 14:17:38,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2190, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2341, PETRI_PLACES=174, PETRI_TRANSITIONS=195} [2024-06-04 14:17:38,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-04 14:17:38,975 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 195 transitions, 2341 flow [2024-06-04 14:17:38,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:38,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:38,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:38,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:17:38,976 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:38,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2133127070, now seen corresponding path program 1 times [2024-06-04 14:17:38,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:38,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815054883] [2024-06-04 14:17:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:38,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:39,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:39,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815054883] [2024-06-04 14:17:39,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815054883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:39,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:39,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:39,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893826564] [2024-06-04 14:17:39,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:39,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:39,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:39,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:39,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:39,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:39,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 195 transitions, 2341 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:39,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:39,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:39,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:39,474 INFO L124 PetriNetUnfolderBase]: 1587/2704 cut-off events. [2024-06-04 14:17:39,474 INFO L125 PetriNetUnfolderBase]: For 90394/90394 co-relation queries the response was YES. [2024-06-04 14:17:39,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16332 conditions, 2704 events. 1587/2704 cut-off events. For 90394/90394 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16043 event pairs, 352 based on Foata normal form. 12/2701 useless extension candidates. Maximal degree in co-relation 16244. Up to 1919 conditions per place. [2024-06-04 14:17:39,496 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 170 selfloop transitions, 49 changer transitions 0/226 dead transitions. [2024-06-04 14:17:39,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 226 transitions, 2885 flow [2024-06-04 14:17:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:39,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 14:17:39,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 14:17:39,498 INFO L175 Difference]: Start difference. First operand has 174 places, 195 transitions, 2341 flow. Second operand 7 states and 176 transitions. [2024-06-04 14:17:39,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 226 transitions, 2885 flow [2024-06-04 14:17:39,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 226 transitions, 2817 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 14:17:39,657 INFO L231 Difference]: Finished difference. Result has 178 places, 196 transitions, 2399 flow [2024-06-04 14:17:39,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2399, PETRI_PLACES=178, PETRI_TRANSITIONS=196} [2024-06-04 14:17:39,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-04 14:17:39,658 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 196 transitions, 2399 flow [2024-06-04 14:17:39,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:39,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:39,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:39,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:17:39,659 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:39,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash -427492630, now seen corresponding path program 7 times [2024-06-04 14:17:39,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:39,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199763456] [2024-06-04 14:17:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:39,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:39,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:39,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199763456] [2024-06-04 14:17:39,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199763456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:39,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:39,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:39,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676063474] [2024-06-04 14:17:39,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:39,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:39,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:39,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:39,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:39,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 196 transitions, 2399 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:39,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:39,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:39,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:40,168 INFO L124 PetriNetUnfolderBase]: 1628/2798 cut-off events. [2024-06-04 14:17:40,168 INFO L125 PetriNetUnfolderBase]: For 94785/94791 co-relation queries the response was YES. [2024-06-04 14:17:40,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16932 conditions, 2798 events. 1628/2798 cut-off events. For 94785/94791 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16773 event pairs, 317 based on Foata normal form. 12/2802 useless extension candidates. Maximal degree in co-relation 16842. Up to 2106 conditions per place. [2024-06-04 14:17:40,190 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 46 changer transitions 0/236 dead transitions. [2024-06-04 14:17:40,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 236 transitions, 3121 flow [2024-06-04 14:17:40,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:40,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-04 14:17:40,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-04 14:17:40,191 INFO L175 Difference]: Start difference. First operand has 178 places, 196 transitions, 2399 flow. Second operand 7 states and 184 transitions. [2024-06-04 14:17:40,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 236 transitions, 3121 flow [2024-06-04 14:17:40,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 236 transitions, 3009 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 14:17:40,357 INFO L231 Difference]: Finished difference. Result has 181 places, 198 transitions, 2419 flow [2024-06-04 14:17:40,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2419, PETRI_PLACES=181, PETRI_TRANSITIONS=198} [2024-06-04 14:17:40,357 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-04 14:17:40,357 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 198 transitions, 2419 flow [2024-06-04 14:17:40,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:40,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:40,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:40,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:17:40,358 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:40,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:40,358 INFO L85 PathProgramCache]: Analyzing trace with hash -597628874, now seen corresponding path program 8 times [2024-06-04 14:17:40,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:40,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913426215] [2024-06-04 14:17:40,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:40,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:40,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:40,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913426215] [2024-06-04 14:17:40,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913426215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:40,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:40,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:40,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526245921] [2024-06-04 14:17:40,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:40,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:40,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:40,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:40,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:40,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:40,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 198 transitions, 2419 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:40,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:40,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:40,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:40,856 INFO L124 PetriNetUnfolderBase]: 1686/2896 cut-off events. [2024-06-04 14:17:40,856 INFO L125 PetriNetUnfolderBase]: For 102173/102179 co-relation queries the response was YES. [2024-06-04 14:17:40,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17434 conditions, 2896 events. 1686/2896 cut-off events. For 102173/102179 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17488 event pairs, 422 based on Foata normal form. 16/2904 useless extension candidates. Maximal degree in co-relation 17342. Up to 2377 conditions per place. [2024-06-04 14:17:40,883 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 44 changer transitions 0/232 dead transitions. [2024-06-04 14:17:40,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 232 transitions, 2981 flow [2024-06-04 14:17:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 14:17:40,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-04 14:17:40,885 INFO L175 Difference]: Start difference. First operand has 181 places, 198 transitions, 2419 flow. Second operand 7 states and 179 transitions. [2024-06-04 14:17:40,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 232 transitions, 2981 flow [2024-06-04 14:17:41,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 232 transitions, 2837 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 14:17:41,112 INFO L231 Difference]: Finished difference. Result has 182 places, 199 transitions, 2392 flow [2024-06-04 14:17:41,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2392, PETRI_PLACES=182, PETRI_TRANSITIONS=199} [2024-06-04 14:17:41,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-04 14:17:41,113 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 199 transitions, 2392 flow [2024-06-04 14:17:41,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:41,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:41,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:41,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:17:41,113 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:41,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:41,114 INFO L85 PathProgramCache]: Analyzing trace with hash -398182934, now seen corresponding path program 9 times [2024-06-04 14:17:41,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:41,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259710156] [2024-06-04 14:17:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:41,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:41,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:41,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259710156] [2024-06-04 14:17:41,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259710156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:41,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:41,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:41,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429260009] [2024-06-04 14:17:41,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:41,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:41,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:41,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:41,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:41,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:41,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 199 transitions, 2392 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:41,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:41,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:41,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:41,635 INFO L124 PetriNetUnfolderBase]: 1744/2994 cut-off events. [2024-06-04 14:17:41,636 INFO L125 PetriNetUnfolderBase]: For 106768/106774 co-relation queries the response was YES. [2024-06-04 14:17:41,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17684 conditions, 2994 events. 1744/2994 cut-off events. For 106768/106774 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18262 event pairs, 432 based on Foata normal form. 16/3002 useless extension candidates. Maximal degree in co-relation 17592. Up to 2475 conditions per place. [2024-06-04 14:17:41,661 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 180 selfloop transitions, 43 changer transitions 0/230 dead transitions. [2024-06-04 14:17:41,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 230 transitions, 2940 flow [2024-06-04 14:17:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 14:17:41,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 14:17:41,663 INFO L175 Difference]: Start difference. First operand has 182 places, 199 transitions, 2392 flow. Second operand 7 states and 176 transitions. [2024-06-04 14:17:41,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 230 transitions, 2940 flow [2024-06-04 14:17:41,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 230 transitions, 2849 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 14:17:41,842 INFO L231 Difference]: Finished difference. Result has 184 places, 200 transitions, 2414 flow [2024-06-04 14:17:41,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2414, PETRI_PLACES=184, PETRI_TRANSITIONS=200} [2024-06-04 14:17:41,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-04 14:17:41,843 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 200 transitions, 2414 flow [2024-06-04 14:17:41,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:41,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:41,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:41,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:17:41,843 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:41,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:41,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1285671304, now seen corresponding path program 10 times [2024-06-04 14:17:41,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:41,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360293220] [2024-06-04 14:17:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:41,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:41,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:41,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360293220] [2024-06-04 14:17:41,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360293220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:41,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:41,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:41,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788410458] [2024-06-04 14:17:41,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:41,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:41,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:41,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:42,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:42,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 200 transitions, 2414 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:42,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:42,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:42,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:42,408 INFO L124 PetriNetUnfolderBase]: 1716/2940 cut-off events. [2024-06-04 14:17:42,408 INFO L125 PetriNetUnfolderBase]: For 101748/101754 co-relation queries the response was YES. [2024-06-04 14:17:42,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17014 conditions, 2940 events. 1716/2940 cut-off events. For 101748/101754 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17903 event pairs, 418 based on Foata normal form. 20/2948 useless extension candidates. Maximal degree in co-relation 16921. Up to 2431 conditions per place. [2024-06-04 14:17:42,434 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 179 selfloop transitions, 42 changer transitions 0/228 dead transitions. [2024-06-04 14:17:42,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 228 transitions, 2952 flow [2024-06-04 14:17:42,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:42,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:42,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 14:17:42,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 14:17:42,436 INFO L175 Difference]: Start difference. First operand has 184 places, 200 transitions, 2414 flow. Second operand 7 states and 170 transitions. [2024-06-04 14:17:42,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 228 transitions, 2952 flow [2024-06-04 14:17:42,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 228 transitions, 2849 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:17:42,637 INFO L231 Difference]: Finished difference. Result has 186 places, 201 transitions, 2424 flow [2024-06-04 14:17:42,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2424, PETRI_PLACES=186, PETRI_TRANSITIONS=201} [2024-06-04 14:17:42,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-04 14:17:42,638 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 201 transitions, 2424 flow [2024-06-04 14:17:42,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:42,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:42,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:42,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:17:42,639 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:42,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:42,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1293295816, now seen corresponding path program 2 times [2024-06-04 14:17:42,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:42,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161375508] [2024-06-04 14:17:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:42,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:42,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:42,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161375508] [2024-06-04 14:17:42,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161375508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:42,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:42,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:42,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070126159] [2024-06-04 14:17:42,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:42,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:42,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:42,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:42,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:42,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:42,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 201 transitions, 2424 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:42,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:42,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:42,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:43,239 INFO L124 PetriNetUnfolderBase]: 1757/3021 cut-off events. [2024-06-04 14:17:43,240 INFO L125 PetriNetUnfolderBase]: For 103207/103213 co-relation queries the response was YES. [2024-06-04 14:17:43,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17312 conditions, 3021 events. 1757/3021 cut-off events. For 103207/103213 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18588 event pairs, 418 based on Foata normal form. 16/3025 useless extension candidates. Maximal degree in co-relation 17218. Up to 2415 conditions per place. [2024-06-04 14:17:43,264 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 44 changer transitions 0/232 dead transitions. [2024-06-04 14:17:43,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 232 transitions, 2982 flow [2024-06-04 14:17:43,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:43,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:17:43,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 14:17:43,272 INFO L175 Difference]: Start difference. First operand has 186 places, 201 transitions, 2424 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:17:43,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 232 transitions, 2982 flow [2024-06-04 14:17:43,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 232 transitions, 2897 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 14:17:43,465 INFO L231 Difference]: Finished difference. Result has 188 places, 202 transitions, 2457 flow [2024-06-04 14:17:43,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2457, PETRI_PLACES=188, PETRI_TRANSITIONS=202} [2024-06-04 14:17:43,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-04 14:17:43,466 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 202 transitions, 2457 flow [2024-06-04 14:17:43,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:43,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:43,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:43,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:17:43,466 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:43,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:43,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1364068624, now seen corresponding path program 3 times [2024-06-04 14:17:43,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:43,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208432435] [2024-06-04 14:17:43,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:43,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:43,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:43,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208432435] [2024-06-04 14:17:43,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208432435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:43,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:43,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:43,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466878565] [2024-06-04 14:17:43,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:43,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:43,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:43,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:43,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:43,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:43,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 202 transitions, 2457 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:43,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:43,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:43,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:44,011 INFO L124 PetriNetUnfolderBase]: 1798/3107 cut-off events. [2024-06-04 14:17:44,011 INFO L125 PetriNetUnfolderBase]: For 107677/107683 co-relation queries the response was YES. [2024-06-04 14:17:44,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17761 conditions, 3107 events. 1798/3107 cut-off events. For 107677/107683 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19246 event pairs, 431 based on Foata normal form. 12/3111 useless extension candidates. Maximal degree in co-relation 17666. Up to 2394 conditions per place. [2024-06-04 14:17:44,034 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 46 changer transitions 0/236 dead transitions. [2024-06-04 14:17:44,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 236 transitions, 3033 flow [2024-06-04 14:17:44,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:44,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 14:17:44,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-04 14:17:44,036 INFO L175 Difference]: Start difference. First operand has 188 places, 202 transitions, 2457 flow. Second operand 7 states and 178 transitions. [2024-06-04 14:17:44,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 236 transitions, 3033 flow [2024-06-04 14:17:44,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 236 transitions, 2929 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 14:17:44,218 INFO L231 Difference]: Finished difference. Result has 190 places, 203 transitions, 2477 flow [2024-06-04 14:17:44,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2353, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2477, PETRI_PLACES=190, PETRI_TRANSITIONS=203} [2024-06-04 14:17:44,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-04 14:17:44,219 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 203 transitions, 2477 flow [2024-06-04 14:17:44,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:44,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:44,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:44,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:17:44,220 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:44,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:44,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1855156424, now seen corresponding path program 4 times [2024-06-04 14:17:44,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:44,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318596824] [2024-06-04 14:17:44,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:44,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:44,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:44,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318596824] [2024-06-04 14:17:44,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318596824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:44,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:44,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:44,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413399269] [2024-06-04 14:17:44,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:44,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:44,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:44,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:44,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:44,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:44,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 203 transitions, 2477 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:44,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:44,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:44,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:44,722 INFO L124 PetriNetUnfolderBase]: 1778/3075 cut-off events. [2024-06-04 14:17:44,722 INFO L125 PetriNetUnfolderBase]: For 103287/103293 co-relation queries the response was YES. [2024-06-04 14:17:44,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17193 conditions, 3075 events. 1778/3075 cut-off events. For 103287/103293 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19150 event pairs, 378 based on Foata normal form. 16/3079 useless extension candidates. Maximal degree in co-relation 17097. Up to 1710 conditions per place. [2024-06-04 14:17:44,746 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 171 selfloop transitions, 55 changer transitions 0/233 dead transitions. [2024-06-04 14:17:44,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 233 transitions, 2943 flow [2024-06-04 14:17:44,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:44,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 14:17:44,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-04 14:17:44,748 INFO L175 Difference]: Start difference. First operand has 190 places, 203 transitions, 2477 flow. Second operand 7 states and 172 transitions. [2024-06-04 14:17:44,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 233 transitions, 2943 flow [2024-06-04 14:17:44,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 233 transitions, 2815 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 14:17:44,891 INFO L231 Difference]: Finished difference. Result has 190 places, 202 transitions, 2389 flow [2024-06-04 14:17:44,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2275, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2389, PETRI_PLACES=190, PETRI_TRANSITIONS=202} [2024-06-04 14:17:44,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-04 14:17:44,892 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 202 transitions, 2389 flow [2024-06-04 14:17:44,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-04 14:17:44,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:44,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:44,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:17:44,892 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:44,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:44,893 INFO L85 PathProgramCache]: Analyzing trace with hash 113752879, now seen corresponding path program 1 times [2024-06-04 14:17:44,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:44,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033999137] [2024-06-04 14:17:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:44,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:44,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:44,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033999137] [2024-06-04 14:17:44,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033999137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:44,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:44,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:44,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357571468] [2024-06-04 14:17:44,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:44,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:44,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:45,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:45,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 202 transitions, 2389 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:45,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:45,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:45,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:45,407 INFO L124 PetriNetUnfolderBase]: 1796/3079 cut-off events. [2024-06-04 14:17:45,407 INFO L125 PetriNetUnfolderBase]: For 95212/95212 co-relation queries the response was YES. [2024-06-04 14:17:45,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17323 conditions, 3079 events. 1796/3079 cut-off events. For 95212/95212 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 18972 event pairs, 430 based on Foata normal form. 2/3073 useless extension candidates. Maximal degree in co-relation 17227. Up to 2581 conditions per place. [2024-06-04 14:17:45,429 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 147 selfloop transitions, 79 changer transitions 0/233 dead transitions. [2024-06-04 14:17:45,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 233 transitions, 3265 flow [2024-06-04 14:17:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:45,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 14:17:45,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 14:17:45,430 INFO L175 Difference]: Start difference. First operand has 190 places, 202 transitions, 2389 flow. Second operand 7 states and 171 transitions. [2024-06-04 14:17:45,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 233 transitions, 3265 flow [2024-06-04 14:17:45,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 233 transitions, 3068 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-04 14:17:45,590 INFO L231 Difference]: Finished difference. Result has 190 places, 213 transitions, 2483 flow [2024-06-04 14:17:45,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2192, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2483, PETRI_PLACES=190, PETRI_TRANSITIONS=213} [2024-06-04 14:17:45,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-04 14:17:45,591 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 213 transitions, 2483 flow [2024-06-04 14:17:45,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:45,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:45,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:45,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:17:45,592 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:45,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:45,592 INFO L85 PathProgramCache]: Analyzing trace with hash 418301511, now seen corresponding path program 2 times [2024-06-04 14:17:45,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:45,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315474317] [2024-06-04 14:17:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:45,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:45,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:45,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315474317] [2024-06-04 14:17:45,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315474317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:45,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:45,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:45,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037981886] [2024-06-04 14:17:45,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:45,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:45,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:45,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:45,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:45,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:45,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 213 transitions, 2483 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:45,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:45,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:45,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:46,104 INFO L124 PetriNetUnfolderBase]: 1822/3126 cut-off events. [2024-06-04 14:17:46,105 INFO L125 PetriNetUnfolderBase]: For 100827/100827 co-relation queries the response was YES. [2024-06-04 14:17:46,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17461 conditions, 3126 events. 1822/3126 cut-off events. For 100827/100827 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19326 event pairs, 419 based on Foata normal form. 2/3121 useless extension candidates. Maximal degree in co-relation 17366. Up to 2724 conditions per place. [2024-06-04 14:17:46,131 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 66 changer transitions 0/238 dead transitions. [2024-06-04 14:17:46,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 238 transitions, 3353 flow [2024-06-04 14:17:46,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 14:17:46,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-04 14:17:46,132 INFO L175 Difference]: Start difference. First operand has 190 places, 213 transitions, 2483 flow. Second operand 7 states and 167 transitions. [2024-06-04 14:17:46,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 238 transitions, 3353 flow [2024-06-04 14:17:46,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 238 transitions, 3218 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-04 14:17:46,318 INFO L231 Difference]: Finished difference. Result has 194 places, 221 transitions, 2599 flow [2024-06-04 14:17:46,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2599, PETRI_PLACES=194, PETRI_TRANSITIONS=221} [2024-06-04 14:17:46,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-04 14:17:46,319 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 221 transitions, 2599 flow [2024-06-04 14:17:46,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:46,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:46,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:46,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:17:46,319 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:46,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:46,320 INFO L85 PathProgramCache]: Analyzing trace with hash 418307091, now seen corresponding path program 3 times [2024-06-04 14:17:46,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:46,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857448603] [2024-06-04 14:17:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:46,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:46,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:46,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857448603] [2024-06-04 14:17:46,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857448603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:46,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:46,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:46,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528615409] [2024-06-04 14:17:46,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:46,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:46,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:46,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:46,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:46,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:46,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 221 transitions, 2599 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:46,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:46,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:46,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:46,916 INFO L124 PetriNetUnfolderBase]: 1816/3118 cut-off events. [2024-06-04 14:17:46,916 INFO L125 PetriNetUnfolderBase]: For 103174/103174 co-relation queries the response was YES. [2024-06-04 14:17:46,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17423 conditions, 3118 events. 1816/3118 cut-off events. For 103174/103174 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19260 event pairs, 419 based on Foata normal form. 2/3113 useless extension candidates. Maximal degree in co-relation 17326. Up to 2718 conditions per place. [2024-06-04 14:17:46,940 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 67 changer transitions 0/239 dead transitions. [2024-06-04 14:17:46,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 239 transitions, 3285 flow [2024-06-04 14:17:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:17:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:17:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-04 14:17:46,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-04 14:17:46,942 INFO L175 Difference]: Start difference. First operand has 194 places, 221 transitions, 2599 flow. Second operand 9 states and 202 transitions. [2024-06-04 14:17:46,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 239 transitions, 3285 flow [2024-06-04 14:17:47,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 239 transitions, 3165 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-04 14:17:47,132 INFO L231 Difference]: Finished difference. Result has 200 places, 221 transitions, 2620 flow [2024-06-04 14:17:47,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2620, PETRI_PLACES=200, PETRI_TRANSITIONS=221} [2024-06-04 14:17:47,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-04 14:17:47,133 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 221 transitions, 2620 flow [2024-06-04 14:17:47,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:47,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:47,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:47,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:17:47,133 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:47,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:47,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1919689313, now seen corresponding path program 4 times [2024-06-04 14:17:47,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:47,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595882097] [2024-06-04 14:17:47,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:47,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:47,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:47,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595882097] [2024-06-04 14:17:47,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595882097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:47,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:47,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:47,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453282329] [2024-06-04 14:17:47,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:47,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:47,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:47,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:47,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:47,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:47,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 221 transitions, 2620 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:47,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:47,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:47,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:47,681 INFO L124 PetriNetUnfolderBase]: 1857/3197 cut-off events. [2024-06-04 14:17:47,681 INFO L125 PetriNetUnfolderBase]: For 108149/108149 co-relation queries the response was YES. [2024-06-04 14:17:47,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18172 conditions, 3197 events. 1857/3197 cut-off events. For 108149/108149 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19902 event pairs, 397 based on Foata normal form. 2/3196 useless extension candidates. Maximal degree in co-relation 18073. Up to 2785 conditions per place. [2024-06-04 14:17:47,709 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 53 changer transitions 0/263 dead transitions. [2024-06-04 14:17:47,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 263 transitions, 3561 flow [2024-06-04 14:17:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 14:17:47,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 14:17:47,711 INFO L175 Difference]: Start difference. First operand has 200 places, 221 transitions, 2620 flow. Second operand 6 states and 156 transitions. [2024-06-04 14:17:47,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 263 transitions, 3561 flow [2024-06-04 14:17:47,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 263 transitions, 3408 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 14:17:47,962 INFO L231 Difference]: Finished difference. Result has 200 places, 239 transitions, 2934 flow [2024-06-04 14:17:47,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2934, PETRI_PLACES=200, PETRI_TRANSITIONS=239} [2024-06-04 14:17:47,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-04 14:17:47,963 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 239 transitions, 2934 flow [2024-06-04 14:17:47,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:47,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:47,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:47,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:17:47,964 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:47,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:47,964 INFO L85 PathProgramCache]: Analyzing trace with hash 568817961, now seen corresponding path program 5 times [2024-06-04 14:17:47,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:47,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013027310] [2024-06-04 14:17:47,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:47,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:48,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:48,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013027310] [2024-06-04 14:17:48,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013027310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:48,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:48,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:48,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767259645] [2024-06-04 14:17:48,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:48,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:48,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:48,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:48,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:48,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:48,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 239 transitions, 2934 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:48,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:48,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:48,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:48,649 INFO L124 PetriNetUnfolderBase]: 1875/3218 cut-off events. [2024-06-04 14:17:48,649 INFO L125 PetriNetUnfolderBase]: For 115488/115488 co-relation queries the response was YES. [2024-06-04 14:17:48,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18678 conditions, 3218 events. 1875/3218 cut-off events. For 115488/115488 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20075 event pairs, 420 based on Foata normal form. 2/3213 useless extension candidates. Maximal degree in co-relation 18576. Up to 2680 conditions per place. [2024-06-04 14:17:48,678 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 156 selfloop transitions, 107 changer transitions 0/270 dead transitions. [2024-06-04 14:17:48,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 270 transitions, 3996 flow [2024-06-04 14:17:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 14:17:48,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 14:17:48,680 INFO L175 Difference]: Start difference. First operand has 200 places, 239 transitions, 2934 flow. Second operand 7 states and 175 transitions. [2024-06-04 14:17:48,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 270 transitions, 3996 flow [2024-06-04 14:17:48,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 270 transitions, 3894 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-04 14:17:48,981 INFO L231 Difference]: Finished difference. Result has 205 places, 246 transitions, 3198 flow [2024-06-04 14:17:48,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3198, PETRI_PLACES=205, PETRI_TRANSITIONS=246} [2024-06-04 14:17:48,981 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-04 14:17:48,981 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 246 transitions, 3198 flow [2024-06-04 14:17:48,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:48,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:48,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:48,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:17:48,982 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:48,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:48,982 INFO L85 PathProgramCache]: Analyzing trace with hash 568823541, now seen corresponding path program 6 times [2024-06-04 14:17:48,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:48,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361021474] [2024-06-04 14:17:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:48,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:49,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:49,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361021474] [2024-06-04 14:17:49,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361021474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:49,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:49,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:49,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517867244] [2024-06-04 14:17:49,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:49,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:49,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:49,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:49,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:49,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:49,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 246 transitions, 3198 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:49,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:49,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:49,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:49,573 INFO L124 PetriNetUnfolderBase]: 1877/3224 cut-off events. [2024-06-04 14:17:49,573 INFO L125 PetriNetUnfolderBase]: For 120322/120322 co-relation queries the response was YES. [2024-06-04 14:17:49,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18994 conditions, 3224 events. 1877/3224 cut-off events. For 120322/120322 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20077 event pairs, 420 based on Foata normal form. 2/3219 useless extension candidates. Maximal degree in co-relation 18890. Up to 2684 conditions per place. [2024-06-04 14:17:49,606 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 155 selfloop transitions, 113 changer transitions 0/275 dead transitions. [2024-06-04 14:17:49,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 275 transitions, 4228 flow [2024-06-04 14:17:49,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:17:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:17:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 14:17:49,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 14:17:49,607 INFO L175 Difference]: Start difference. First operand has 205 places, 246 transitions, 3198 flow. Second operand 9 states and 213 transitions. [2024-06-04 14:17:49,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 275 transitions, 4228 flow [2024-06-04 14:17:49,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 275 transitions, 3982 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 14:17:49,944 INFO L231 Difference]: Finished difference. Result has 209 places, 249 transitions, 3246 flow [2024-06-04 14:17:49,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2966, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3246, PETRI_PLACES=209, PETRI_TRANSITIONS=249} [2024-06-04 14:17:49,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-04 14:17:49,945 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 249 transitions, 3246 flow [2024-06-04 14:17:49,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:49,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:49,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:49,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:17:49,946 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:49,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:49,946 INFO L85 PathProgramCache]: Analyzing trace with hash -465768761, now seen corresponding path program 1 times [2024-06-04 14:17:49,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:49,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462718683] [2024-06-04 14:17:49,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:49,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:50,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:50,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462718683] [2024-06-04 14:17:50,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462718683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:50,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:50,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:50,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717501820] [2024-06-04 14:17:50,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:50,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:50,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:50,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:50,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:50,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:50,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 249 transitions, 3246 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:50,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:50,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:50,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:50,563 INFO L124 PetriNetUnfolderBase]: 1905/3286 cut-off events. [2024-06-04 14:17:50,563 INFO L125 PetriNetUnfolderBase]: For 121649/121655 co-relation queries the response was YES. [2024-06-04 14:17:50,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19267 conditions, 3286 events. 1905/3286 cut-off events. For 121649/121655 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20635 event pairs, 425 based on Foata normal form. 6/3286 useless extension candidates. Maximal degree in co-relation 19163. Up to 2729 conditions per place. [2024-06-04 14:17:50,589 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 205 selfloop transitions, 78 changer transitions 0/290 dead transitions. [2024-06-04 14:17:50,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 290 transitions, 4307 flow [2024-06-04 14:17:50,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:50,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 14:17:50,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-04 14:17:50,590 INFO L175 Difference]: Start difference. First operand has 209 places, 249 transitions, 3246 flow. Second operand 7 states and 177 transitions. [2024-06-04 14:17:50,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 290 transitions, 4307 flow [2024-06-04 14:17:50,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 290 transitions, 4032 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-04 14:17:50,961 INFO L231 Difference]: Finished difference. Result has 209 places, 264 transitions, 3298 flow [2024-06-04 14:17:50,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3298, PETRI_PLACES=209, PETRI_TRANSITIONS=264} [2024-06-04 14:17:50,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-04 14:17:50,968 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 264 transitions, 3298 flow [2024-06-04 14:17:50,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:50,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:50,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:50,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:17:50,969 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:50,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:50,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1150102743, now seen corresponding path program 2 times [2024-06-04 14:17:50,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:50,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019866194] [2024-06-04 14:17:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:50,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:51,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:51,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019866194] [2024-06-04 14:17:51,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019866194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:51,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:51,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:51,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706201933] [2024-06-04 14:17:51,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:51,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:51,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:51,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:51,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:51,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:51,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 264 transitions, 3298 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:51,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:51,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:51,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:51,540 INFO L124 PetriNetUnfolderBase]: 1941/3348 cut-off events. [2024-06-04 14:17:51,541 INFO L125 PetriNetUnfolderBase]: For 124584/124590 co-relation queries the response was YES. [2024-06-04 14:17:51,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19813 conditions, 3348 events. 1941/3348 cut-off events. For 124584/124590 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21138 event pairs, 426 based on Foata normal form. 6/3348 useless extension candidates. Maximal degree in co-relation 19708. Up to 2760 conditions per place. [2024-06-04 14:17:51,571 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 205 selfloop transitions, 84 changer transitions 0/296 dead transitions. [2024-06-04 14:17:51,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 296 transitions, 4351 flow [2024-06-04 14:17:51,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:17:51,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 14:17:51,573 INFO L175 Difference]: Start difference. First operand has 209 places, 264 transitions, 3298 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:17:51,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 296 transitions, 4351 flow [2024-06-04 14:17:51,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 296 transitions, 4247 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-04 14:17:51,911 INFO L231 Difference]: Finished difference. Result has 216 places, 276 transitions, 3520 flow [2024-06-04 14:17:51,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3214, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3520, PETRI_PLACES=216, PETRI_TRANSITIONS=276} [2024-06-04 14:17:51,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-04 14:17:51,911 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 276 transitions, 3520 flow [2024-06-04 14:17:51,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:51,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:51,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:51,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:17:51,912 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:51,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1149716793, now seen corresponding path program 3 times [2024-06-04 14:17:51,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:51,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510829150] [2024-06-04 14:17:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:52,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:52,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510829150] [2024-06-04 14:17:52,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510829150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:52,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:52,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:52,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649518373] [2024-06-04 14:17:52,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:52,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:52,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:52,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:52,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:52,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 276 transitions, 3520 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:52,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:52,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:52,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:52,483 INFO L124 PetriNetUnfolderBase]: 1935/3340 cut-off events. [2024-06-04 14:17:52,483 INFO L125 PetriNetUnfolderBase]: For 127182/127188 co-relation queries the response was YES. [2024-06-04 14:17:52,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19966 conditions, 3340 events. 1935/3340 cut-off events. For 127182/127188 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21095 event pairs, 426 based on Foata normal form. 6/3340 useless extension candidates. Maximal degree in co-relation 19857. Up to 2755 conditions per place. [2024-06-04 14:17:52,575 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 85 changer transitions 0/295 dead transitions. [2024-06-04 14:17:52,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 295 transitions, 4338 flow [2024-06-04 14:17:52,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 14:17:52,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 14:17:52,577 INFO L175 Difference]: Start difference. First operand has 216 places, 276 transitions, 3520 flow. Second operand 7 states and 171 transitions. [2024-06-04 14:17:52,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 295 transitions, 4338 flow [2024-06-04 14:17:52,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 295 transitions, 4170 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-04 14:17:52,846 INFO L231 Difference]: Finished difference. Result has 220 places, 276 transitions, 3529 flow [2024-06-04 14:17:52,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3529, PETRI_PLACES=220, PETRI_TRANSITIONS=276} [2024-06-04 14:17:52,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-04 14:17:52,847 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 276 transitions, 3529 flow [2024-06-04 14:17:52,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:52,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:52,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:52,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:17:52,848 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:52,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:52,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2038670795, now seen corresponding path program 1 times [2024-06-04 14:17:52,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:52,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005054572] [2024-06-04 14:17:52,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:52,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:52,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:52,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005054572] [2024-06-04 14:17:52,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005054572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:52,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:52,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:52,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727602596] [2024-06-04 14:17:52,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:52,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:52,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:52,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:52,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:52,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:52,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 276 transitions, 3529 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:52,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:52,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:52,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:53,426 INFO L124 PetriNetUnfolderBase]: 1940/3345 cut-off events. [2024-06-04 14:17:53,426 INFO L125 PetriNetUnfolderBase]: For 130626/130632 co-relation queries the response was YES. [2024-06-04 14:17:53,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20116 conditions, 3345 events. 1940/3345 cut-off events. For 130626/130632 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21127 event pairs, 416 based on Foata normal form. 5/3345 useless extension candidates. Maximal degree in co-relation 20006. Up to 2902 conditions per place. [2024-06-04 14:17:53,458 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 230 selfloop transitions, 61 changer transitions 0/298 dead transitions. [2024-06-04 14:17:53,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 298 transitions, 4414 flow [2024-06-04 14:17:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:53,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 14:17:53,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-04 14:17:53,459 INFO L175 Difference]: Start difference. First operand has 220 places, 276 transitions, 3529 flow. Second operand 7 states and 166 transitions. [2024-06-04 14:17:53,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 298 transitions, 4414 flow [2024-06-04 14:17:53,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 298 transitions, 4250 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:53,745 INFO L231 Difference]: Finished difference. Result has 223 places, 279 transitions, 3550 flow [2024-06-04 14:17:53,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3550, PETRI_PLACES=223, PETRI_TRANSITIONS=279} [2024-06-04 14:17:53,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-04 14:17:53,746 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 279 transitions, 3550 flow [2024-06-04 14:17:53,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:53,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:53,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:53,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:17:53,747 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:53,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:53,747 INFO L85 PathProgramCache]: Analyzing trace with hash -2043857763, now seen corresponding path program 1 times [2024-06-04 14:17:53,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:53,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692612660] [2024-06-04 14:17:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:53,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:53,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:53,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692612660] [2024-06-04 14:17:53,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692612660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:53,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:53,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:53,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380400209] [2024-06-04 14:17:53,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:53,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:53,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:53,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:53,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:53,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:53,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 279 transitions, 3550 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:53,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:53,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:53,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:54,325 INFO L124 PetriNetUnfolderBase]: 1956/3369 cut-off events. [2024-06-04 14:17:54,325 INFO L125 PetriNetUnfolderBase]: For 139381/139387 co-relation queries the response was YES. [2024-06-04 14:17:54,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20289 conditions, 3369 events. 1956/3369 cut-off events. For 139381/139387 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21220 event pairs, 417 based on Foata normal form. 8/3372 useless extension candidates. Maximal degree in co-relation 20178. Up to 2914 conditions per place. [2024-06-04 14:17:54,413 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 64 changer transitions 0/302 dead transitions. [2024-06-04 14:17:54,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 302 transitions, 4442 flow [2024-06-04 14:17:54,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:17:54,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:17:54,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 14:17:54,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-04 14:17:54,414 INFO L175 Difference]: Start difference. First operand has 223 places, 279 transitions, 3550 flow. Second operand 7 states and 167 transitions. [2024-06-04 14:17:54,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 302 transitions, 4442 flow [2024-06-04 14:17:54,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 302 transitions, 4332 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:54,747 INFO L231 Difference]: Finished difference. Result has 226 places, 282 transitions, 3630 flow [2024-06-04 14:17:54,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3440, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3630, PETRI_PLACES=226, PETRI_TRANSITIONS=282} [2024-06-04 14:17:54,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-04 14:17:54,748 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 282 transitions, 3630 flow [2024-06-04 14:17:54,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:54,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:54,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:54,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:17:54,749 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:54,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1000219847, now seen corresponding path program 4 times [2024-06-04 14:17:54,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:54,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412142589] [2024-06-04 14:17:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:54,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:54,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:54,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412142589] [2024-06-04 14:17:54,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412142589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:54,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:54,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:54,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890916964] [2024-06-04 14:17:54,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:54,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:54,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:54,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:54,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:54,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:54,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 282 transitions, 3630 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:54,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:54,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:54,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:55,398 INFO L124 PetriNetUnfolderBase]: 1974/3398 cut-off events. [2024-06-04 14:17:55,399 INFO L125 PetriNetUnfolderBase]: For 142393/142393 co-relation queries the response was YES. [2024-06-04 14:17:55,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20698 conditions, 3398 events. 1974/3398 cut-off events. For 142393/142393 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21386 event pairs, 396 based on Foata normal form. 2/3397 useless extension candidates. Maximal degree in co-relation 20585. Up to 2900 conditions per place. [2024-06-04 14:17:55,432 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 238 selfloop transitions, 70 changer transitions 0/315 dead transitions. [2024-06-04 14:17:55,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 315 transitions, 4494 flow [2024-06-04 14:17:55,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-04 14:17:55,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-04 14:17:55,433 INFO L175 Difference]: Start difference. First operand has 226 places, 282 transitions, 3630 flow. Second operand 6 states and 159 transitions. [2024-06-04 14:17:55,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 315 transitions, 4494 flow [2024-06-04 14:17:55,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 315 transitions, 4354 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:55,684 INFO L231 Difference]: Finished difference. Result has 229 places, 289 transitions, 3786 flow [2024-06-04 14:17:55,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3786, PETRI_PLACES=229, PETRI_TRANSITIONS=289} [2024-06-04 14:17:55,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-04 14:17:55,685 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 289 transitions, 3786 flow [2024-06-04 14:17:55,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:55,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:55,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:55,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:17:55,685 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:55,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:55,686 INFO L85 PathProgramCache]: Analyzing trace with hash 246786085, now seen corresponding path program 5 times [2024-06-04 14:17:55,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:55,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009290311] [2024-06-04 14:17:55,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:55,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:55,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:55,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009290311] [2024-06-04 14:17:55,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009290311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:55,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:55,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:55,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453991499] [2024-06-04 14:17:55,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:55,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:55,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:55,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:55,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:55,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:55,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 289 transitions, 3786 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:55,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:55,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:55,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:56,323 INFO L124 PetriNetUnfolderBase]: 1992/3432 cut-off events. [2024-06-04 14:17:56,323 INFO L125 PetriNetUnfolderBase]: For 151473/151479 co-relation queries the response was YES. [2024-06-04 14:17:56,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21127 conditions, 3432 events. 1992/3432 cut-off events. For 151473/151479 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21728 event pairs, 429 based on Foata normal form. 6/3432 useless extension candidates. Maximal degree in co-relation 21012. Up to 2821 conditions per place. [2024-06-04 14:17:56,354 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 205 selfloop transitions, 103 changer transitions 0/315 dead transitions. [2024-06-04 14:17:56,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 315 transitions, 4853 flow [2024-06-04 14:17:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:56,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 14:17:56,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-04 14:17:56,356 INFO L175 Difference]: Start difference. First operand has 229 places, 289 transitions, 3786 flow. Second operand 6 states and 152 transitions. [2024-06-04 14:17:56,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 315 transitions, 4853 flow [2024-06-04 14:17:56,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 315 transitions, 4751 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 14:17:56,767 INFO L231 Difference]: Finished difference. Result has 231 places, 296 transitions, 3989 flow [2024-06-04 14:17:56,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3684, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3989, PETRI_PLACES=231, PETRI_TRANSITIONS=296} [2024-06-04 14:17:56,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-04 14:17:56,767 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 296 transitions, 3989 flow [2024-06-04 14:17:56,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:56,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:56,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:56,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:17:56,768 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:56,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:56,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1101112143, now seen corresponding path program 6 times [2024-06-04 14:17:56,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:56,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21762819] [2024-06-04 14:17:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:56,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:56,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:56,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21762819] [2024-06-04 14:17:56,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21762819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:56,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:56,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:17:56,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889572368] [2024-06-04 14:17:56,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:56,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:17:56,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:56,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:17:56,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:17:56,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:56,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 296 transitions, 3989 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:56,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:56,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:56,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:57,460 INFO L124 PetriNetUnfolderBase]: 1986/3425 cut-off events. [2024-06-04 14:17:57,461 INFO L125 PetriNetUnfolderBase]: For 154171/154177 co-relation queries the response was YES. [2024-06-04 14:17:57,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21208 conditions, 3425 events. 1986/3425 cut-off events. For 154171/154177 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 21752 event pairs, 428 based on Foata normal form. 6/3425 useless extension candidates. Maximal degree in co-relation 21092. Up to 2816 conditions per place. [2024-06-04 14:17:57,496 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 106 changer transitions 0/321 dead transitions. [2024-06-04 14:17:57,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 321 transitions, 5003 flow [2024-06-04 14:17:57,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:57,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-04 14:17:57,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-04 14:17:57,498 INFO L175 Difference]: Start difference. First operand has 231 places, 296 transitions, 3989 flow. Second operand 6 states and 158 transitions. [2024-06-04 14:17:57,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 321 transitions, 5003 flow [2024-06-04 14:17:57,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 321 transitions, 4801 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-04 14:17:57,863 INFO L231 Difference]: Finished difference. Result has 234 places, 296 transitions, 4022 flow [2024-06-04 14:17:57,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4022, PETRI_PLACES=234, PETRI_TRANSITIONS=296} [2024-06-04 14:17:57,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-04 14:17:57,864 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 296 transitions, 4022 flow [2024-06-04 14:17:57,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:57,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:57,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:57,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:17:57,865 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:57,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:57,865 INFO L85 PathProgramCache]: Analyzing trace with hash -27023285, now seen corresponding path program 1 times [2024-06-04 14:17:57,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:57,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685047089] [2024-06-04 14:17:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:57,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:57,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:57,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685047089] [2024-06-04 14:17:57,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685047089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:57,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:57,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:57,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011850828] [2024-06-04 14:17:57,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:57,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:57,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:57,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:57,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:57,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:57,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 296 transitions, 4022 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:57,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:57,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:57,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:58,473 INFO L124 PetriNetUnfolderBase]: 2015/3464 cut-off events. [2024-06-04 14:17:58,474 INFO L125 PetriNetUnfolderBase]: For 159414/159420 co-relation queries the response was YES. [2024-06-04 14:17:58,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21697 conditions, 3464 events. 2015/3464 cut-off events. For 159414/159420 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21958 event pairs, 424 based on Foata normal form. 5/3461 useless extension candidates. Maximal degree in co-relation 21581. Up to 2978 conditions per place. [2024-06-04 14:17:58,510 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 252 selfloop transitions, 67 changer transitions 0/326 dead transitions. [2024-06-04 14:17:58,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 326 transitions, 5112 flow [2024-06-04 14:17:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 14:17:58,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-04 14:17:58,512 INFO L175 Difference]: Start difference. First operand has 234 places, 296 transitions, 4022 flow. Second operand 6 states and 145 transitions. [2024-06-04 14:17:58,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 326 transitions, 5112 flow [2024-06-04 14:17:58,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 326 transitions, 4905 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 14:17:58,930 INFO L231 Difference]: Finished difference. Result has 234 places, 308 transitions, 4155 flow [2024-06-04 14:17:58,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4155, PETRI_PLACES=234, PETRI_TRANSITIONS=308} [2024-06-04 14:17:58,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-04 14:17:58,931 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 308 transitions, 4155 flow [2024-06-04 14:17:58,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:58,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:58,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:58,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:17:58,931 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:58,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:58,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1596296523, now seen corresponding path program 2 times [2024-06-04 14:17:58,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:58,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091344855] [2024-06-04 14:17:58,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:58,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:17:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:17:59,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:17:59,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091344855] [2024-06-04 14:17:59,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091344855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:17:59,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:17:59,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:17:59,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840327919] [2024-06-04 14:17:59,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:17:59,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:17:59,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:17:59,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:17:59,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:17:59,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:17:59,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 308 transitions, 4155 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:59,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:17:59,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:17:59,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:17:59,504 INFO L124 PetriNetUnfolderBase]: 2012/3463 cut-off events. [2024-06-04 14:17:59,505 INFO L125 PetriNetUnfolderBase]: For 151476/151482 co-relation queries the response was YES. [2024-06-04 14:17:59,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21405 conditions, 3463 events. 2012/3463 cut-off events. For 151476/151482 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21891 event pairs, 423 based on Foata normal form. 1/3457 useless extension candidates. Maximal degree in co-relation 21290. Up to 2975 conditions per place. [2024-06-04 14:17:59,538 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 251 selfloop transitions, 71 changer transitions 0/329 dead transitions. [2024-06-04 14:17:59,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 329 transitions, 5063 flow [2024-06-04 14:17:59,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:17:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:17:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 14:17:59,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 14:17:59,541 INFO L175 Difference]: Start difference. First operand has 234 places, 308 transitions, 4155 flow. Second operand 6 states and 150 transitions. [2024-06-04 14:17:59,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 329 transitions, 5063 flow [2024-06-04 14:17:59,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 329 transitions, 4933 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-04 14:17:59,923 INFO L231 Difference]: Finished difference. Result has 238 places, 308 transitions, 4173 flow [2024-06-04 14:17:59,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4025, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4173, PETRI_PLACES=238, PETRI_TRANSITIONS=308} [2024-06-04 14:17:59,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-04 14:17:59,923 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 308 transitions, 4173 flow [2024-06-04 14:17:59,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:17:59,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:17:59,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:17:59,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:17:59,924 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:17:59,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:17:59,924 INFO L85 PathProgramCache]: Analyzing trace with hash -283403825, now seen corresponding path program 3 times [2024-06-04 14:17:59,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:17:59,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456943011] [2024-06-04 14:17:59,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:17:59,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:17:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:00,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:00,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456943011] [2024-06-04 14:18:00,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456943011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:00,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:00,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:18:00,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122248742] [2024-06-04 14:18:00,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:00,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:18:00,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:00,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:18:00,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:18:00,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:00,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 308 transitions, 4173 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:00,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:00,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:00,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:00,515 INFO L124 PetriNetUnfolderBase]: 2017/3474 cut-off events. [2024-06-04 14:18:00,515 INFO L125 PetriNetUnfolderBase]: For 156714/156720 co-relation queries the response was YES. [2024-06-04 14:18:00,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21565 conditions, 3474 events. 2017/3474 cut-off events. For 156714/156720 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22004 event pairs, 408 based on Foata normal form. 5/3474 useless extension candidates. Maximal degree in co-relation 21449. Up to 3064 conditions per place. [2024-06-04 14:18:00,550 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 285 selfloop transitions, 35 changer transitions 0/327 dead transitions. [2024-06-04 14:18:00,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 327 transitions, 4910 flow [2024-06-04 14:18:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:18:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:18:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 14:18:00,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-04 14:18:00,552 INFO L175 Difference]: Start difference. First operand has 238 places, 308 transitions, 4173 flow. Second operand 6 states and 143 transitions. [2024-06-04 14:18:00,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 327 transitions, 4910 flow [2024-06-04 14:18:00,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 327 transitions, 4671 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:18:00,886 INFO L231 Difference]: Finished difference. Result has 239 places, 311 transitions, 4073 flow [2024-06-04 14:18:00,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3943, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4073, PETRI_PLACES=239, PETRI_TRANSITIONS=311} [2024-06-04 14:18:00,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-04 14:18:00,887 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 311 transitions, 4073 flow [2024-06-04 14:18:00,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:00,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:00,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:00,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:18:00,887 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:00,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:00,888 INFO L85 PathProgramCache]: Analyzing trace with hash -14643125, now seen corresponding path program 4 times [2024-06-04 14:18:00,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:00,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731247070] [2024-06-04 14:18:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:00,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:00,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731247070] [2024-06-04 14:18:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731247070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:00,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:00,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:18:00,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342600891] [2024-06-04 14:18:00,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:00,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:18:00,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:00,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:18:00,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:18:00,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:00,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 311 transitions, 4073 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:00,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:00,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:00,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:01,442 INFO L124 PetriNetUnfolderBase]: 2014/3464 cut-off events. [2024-06-04 14:18:01,442 INFO L125 PetriNetUnfolderBase]: For 160193/160199 co-relation queries the response was YES. [2024-06-04 14:18:01,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21410 conditions, 3464 events. 2014/3464 cut-off events. For 160193/160199 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21968 event pairs, 424 based on Foata normal form. 5/3461 useless extension candidates. Maximal degree in co-relation 21294. Up to 2978 conditions per place. [2024-06-04 14:18:01,535 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 249 selfloop transitions, 69 changer transitions 0/325 dead transitions. [2024-06-04 14:18:01,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 325 transitions, 4853 flow [2024-06-04 14:18:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:18:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:18:01,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 14:18:01,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 14:18:01,537 INFO L175 Difference]: Start difference. First operand has 239 places, 311 transitions, 4073 flow. Second operand 6 states and 141 transitions. [2024-06-04 14:18:01,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 325 transitions, 4853 flow [2024-06-04 14:18:01,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 325 transitions, 4755 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 14:18:01,943 INFO L231 Difference]: Finished difference. Result has 240 places, 311 transitions, 4119 flow [2024-06-04 14:18:01,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3975, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4119, PETRI_PLACES=240, PETRI_TRANSITIONS=311} [2024-06-04 14:18:01,943 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-04 14:18:01,943 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 311 transitions, 4119 flow [2024-06-04 14:18:01,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:01,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:01,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:01,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:18:01,944 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:01,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:01,944 INFO L85 PathProgramCache]: Analyzing trace with hash 621287301, now seen corresponding path program 2 times [2024-06-04 14:18:01,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:01,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377411372] [2024-06-04 14:18:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:01,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:02,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:02,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377411372] [2024-06-04 14:18:02,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377411372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:02,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:02,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:02,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114174125] [2024-06-04 14:18:02,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:02,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:02,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:02,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:02,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:02,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:02,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 311 transitions, 4119 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:02,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:02,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:02,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:02,541 INFO L124 PetriNetUnfolderBase]: 2019/3468 cut-off events. [2024-06-04 14:18:02,542 INFO L125 PetriNetUnfolderBase]: For 164246/164246 co-relation queries the response was YES. [2024-06-04 14:18:02,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21641 conditions, 3468 events. 2019/3468 cut-off events. For 164246/164246 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21941 event pairs, 418 based on Foata normal form. 1/3462 useless extension candidates. Maximal degree in co-relation 21525. Up to 3013 conditions per place. [2024-06-04 14:18:02,575 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 259 selfloop transitions, 64 changer transitions 0/330 dead transitions. [2024-06-04 14:18:02,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 330 transitions, 5090 flow [2024-06-04 14:18:02,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:18:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:18:02,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 14:18:02,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-04 14:18:02,577 INFO L175 Difference]: Start difference. First operand has 240 places, 311 transitions, 4119 flow. Second operand 7 states and 163 transitions. [2024-06-04 14:18:02,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 330 transitions, 5090 flow [2024-06-04 14:18:03,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 330 transitions, 4907 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:18:03,014 INFO L231 Difference]: Finished difference. Result has 242 places, 314 transitions, 4133 flow [2024-06-04 14:18:03,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3936, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4133, PETRI_PLACES=242, PETRI_TRANSITIONS=314} [2024-06-04 14:18:03,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-04 14:18:03,015 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 314 transitions, 4133 flow [2024-06-04 14:18:03,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:03,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:03,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:03,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:18:03,016 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:03,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:03,016 INFO L85 PathProgramCache]: Analyzing trace with hash 82431405, now seen corresponding path program 5 times [2024-06-04 14:18:03,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:03,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993784057] [2024-06-04 14:18:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:03,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:03,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:03,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993784057] [2024-06-04 14:18:03,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993784057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:03,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:03,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:18:03,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670341188] [2024-06-04 14:18:03,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:03,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:18:03,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:03,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:18:03,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:18:03,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:03,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 314 transitions, 4133 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:03,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:03,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:03,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:03,592 INFO L124 PetriNetUnfolderBase]: 2013/3465 cut-off events. [2024-06-04 14:18:03,593 INFO L125 PetriNetUnfolderBase]: For 168760/168766 co-relation queries the response was YES. [2024-06-04 14:18:03,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21467 conditions, 3465 events. 2013/3465 cut-off events. For 168760/168766 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22016 event pairs, 423 based on Foata normal form. 6/3463 useless extension candidates. Maximal degree in co-relation 21351. Up to 2994 conditions per place. [2024-06-04 14:18:03,628 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 264 selfloop transitions, 59 changer transitions 0/330 dead transitions. [2024-06-04 14:18:03,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 330 transitions, 4933 flow [2024-06-04 14:18:03,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:18:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:18:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 14:18:03,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 14:18:03,629 INFO L175 Difference]: Start difference. First operand has 242 places, 314 transitions, 4133 flow. Second operand 5 states and 126 transitions. [2024-06-04 14:18:03,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 330 transitions, 4933 flow [2024-06-04 14:18:04,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 330 transitions, 4800 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 14:18:04,064 INFO L231 Difference]: Finished difference. Result has 243 places, 314 transitions, 4132 flow [2024-06-04 14:18:04,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4132, PETRI_PLACES=243, PETRI_TRANSITIONS=314} [2024-06-04 14:18:04,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-04 14:18:04,065 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 314 transitions, 4132 flow [2024-06-04 14:18:04,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:04,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:04,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:04,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 14:18:04,066 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:04,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:04,066 INFO L85 PathProgramCache]: Analyzing trace with hash 620841645, now seen corresponding path program 6 times [2024-06-04 14:18:04,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:04,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310109600] [2024-06-04 14:18:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:04,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:04,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:04,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310109600] [2024-06-04 14:18:04,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310109600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:04,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:04,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:18:04,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271016458] [2024-06-04 14:18:04,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:04,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:18:04,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:04,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:18:04,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:18:04,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:04,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 314 transitions, 4132 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:04,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:04,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:04,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:04,674 INFO L124 PetriNetUnfolderBase]: 2007/3463 cut-off events. [2024-06-04 14:18:04,674 INFO L125 PetriNetUnfolderBase]: For 169920/169926 co-relation queries the response was YES. [2024-06-04 14:18:04,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21379 conditions, 3463 events. 2007/3463 cut-off events. For 169920/169926 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22036 event pairs, 407 based on Foata normal form. 6/3464 useless extension candidates. Maximal degree in co-relation 21261. Up to 2988 conditions per place. [2024-06-04 14:18:04,709 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 67 changer transitions 0/340 dead transitions. [2024-06-04 14:18:04,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 340 transitions, 4864 flow [2024-06-04 14:18:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:18:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:18:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:18:04,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 14:18:04,710 INFO L175 Difference]: Start difference. First operand has 243 places, 314 transitions, 4132 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:18:04,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 340 transitions, 4864 flow [2024-06-04 14:18:05,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 340 transitions, 4693 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 14:18:05,156 INFO L231 Difference]: Finished difference. Result has 244 places, 314 transitions, 4112 flow [2024-06-04 14:18:05,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3961, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4112, PETRI_PLACES=244, PETRI_TRANSITIONS=314} [2024-06-04 14:18:05,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-04 14:18:05,157 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 314 transitions, 4112 flow [2024-06-04 14:18:05,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:05,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:05,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:05,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 14:18:05,158 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:05,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:05,158 INFO L85 PathProgramCache]: Analyzing trace with hash 246791045, now seen corresponding path program 3 times [2024-06-04 14:18:05,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:05,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660239356] [2024-06-04 14:18:05,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:05,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:05,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:05,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660239356] [2024-06-04 14:18:05,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660239356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:05,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:05,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:05,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191358511] [2024-06-04 14:18:05,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:05,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:05,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:05,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:05,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:05,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:05,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 314 transitions, 4112 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:05,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:05,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:05,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:05,759 INFO L124 PetriNetUnfolderBase]: 2004/3459 cut-off events. [2024-06-04 14:18:05,759 INFO L125 PetriNetUnfolderBase]: For 166550/166556 co-relation queries the response was YES. [2024-06-04 14:18:05,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21296 conditions, 3459 events. 2004/3459 cut-off events. For 166550/166556 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21978 event pairs, 414 based on Foata normal form. 5/3459 useless extension candidates. Maximal degree in co-relation 21178. Up to 2994 conditions per place. [2024-06-04 14:18:05,794 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 259 selfloop transitions, 65 changer transitions 0/331 dead transitions. [2024-06-04 14:18:05,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 331 transitions, 4918 flow [2024-06-04 14:18:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:18:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:18:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 14:18:05,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 14:18:05,795 INFO L175 Difference]: Start difference. First operand has 244 places, 314 transitions, 4112 flow. Second operand 6 states and 146 transitions. [2024-06-04 14:18:05,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 331 transitions, 4918 flow [2024-06-04 14:18:06,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 331 transitions, 4762 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 14:18:06,155 INFO L231 Difference]: Finished difference. Result has 243 places, 314 transitions, 4100 flow [2024-06-04 14:18:06,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3960, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4100, PETRI_PLACES=243, PETRI_TRANSITIONS=314} [2024-06-04 14:18:06,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-04 14:18:06,156 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 314 transitions, 4100 flow [2024-06-04 14:18:06,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:06,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:06,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:06,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 14:18:06,156 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:06,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:06,157 INFO L85 PathProgramCache]: Analyzing trace with hash 453652805, now seen corresponding path program 4 times [2024-06-04 14:18:06,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:06,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092965181] [2024-06-04 14:18:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:06,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:06,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:06,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092965181] [2024-06-04 14:18:06,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092965181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:06,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:06,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:06,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797079276] [2024-06-04 14:18:06,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:06,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:06,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:06,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:06,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:06,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:06,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 314 transitions, 4100 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:06,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:06,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:06,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:06,836 INFO L124 PetriNetUnfolderBase]: 2001/3444 cut-off events. [2024-06-04 14:18:06,837 INFO L125 PetriNetUnfolderBase]: For 159930/159930 co-relation queries the response was YES. [2024-06-04 14:18:06,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21077 conditions, 3444 events. 2001/3444 cut-off events. For 159930/159930 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21812 event pairs, 417 based on Foata normal form. 1/3438 useless extension candidates. Maximal degree in co-relation 20959. Up to 2991 conditions per place. [2024-06-04 14:18:06,866 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 255 selfloop transitions, 65 changer transitions 0/327 dead transitions. [2024-06-04 14:18:06,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 327 transitions, 4772 flow [2024-06-04 14:18:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:18:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:18:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 14:18:06,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 14:18:06,867 INFO L175 Difference]: Start difference. First operand has 243 places, 314 transitions, 4100 flow. Second operand 6 states and 142 transitions. [2024-06-04 14:18:06,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 327 transitions, 4772 flow [2024-06-04 14:18:07,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 327 transitions, 4558 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 14:18:07,268 INFO L231 Difference]: Finished difference. Result has 242 places, 314 transitions, 4026 flow [2024-06-04 14:18:07,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4026, PETRI_PLACES=242, PETRI_TRANSITIONS=314} [2024-06-04 14:18:07,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-04 14:18:07,269 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 314 transitions, 4026 flow [2024-06-04 14:18:07,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:07,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:07,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:07,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 14:18:07,269 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:07,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:07,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1012718179, now seen corresponding path program 2 times [2024-06-04 14:18:07,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:07,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446742442] [2024-06-04 14:18:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:07,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:07,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:07,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446742442] [2024-06-04 14:18:07,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446742442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:07,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:07,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:07,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954684008] [2024-06-04 14:18:07,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:07,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:07,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:07,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:07,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:07,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:07,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 314 transitions, 4026 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:07,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:07,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:07,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:07,886 INFO L124 PetriNetUnfolderBase]: 2017/3479 cut-off events. [2024-06-04 14:18:07,886 INFO L125 PetriNetUnfolderBase]: For 164565/164571 co-relation queries the response was YES. [2024-06-04 14:18:07,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21164 conditions, 3479 events. 2017/3479 cut-off events. For 164565/164571 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22102 event pairs, 416 based on Foata normal form. 8/3482 useless extension candidates. Maximal degree in co-relation 21047. Up to 2991 conditions per place. [2024-06-04 14:18:07,920 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 256 selfloop transitions, 71 changer transitions 0/334 dead transitions. [2024-06-04 14:18:07,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 334 transitions, 4778 flow [2024-06-04 14:18:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:18:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:18:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 14:18:07,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 14:18:07,922 INFO L175 Difference]: Start difference. First operand has 242 places, 314 transitions, 4026 flow. Second operand 6 states and 146 transitions. [2024-06-04 14:18:07,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 334 transitions, 4778 flow [2024-06-04 14:18:08,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 334 transitions, 4600 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 14:18:08,331 INFO L231 Difference]: Finished difference. Result has 242 places, 317 transitions, 4062 flow [2024-06-04 14:18:08,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3848, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4062, PETRI_PLACES=242, PETRI_TRANSITIONS=317} [2024-06-04 14:18:08,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-04 14:18:08,332 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 317 transitions, 4062 flow [2024-06-04 14:18:08,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:08,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:08,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:08,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 14:18:08,332 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:08,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:08,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1000205959, now seen corresponding path program 3 times [2024-06-04 14:18:08,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:08,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019701204] [2024-06-04 14:18:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:08,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:08,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:08,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019701204] [2024-06-04 14:18:08,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019701204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:08,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:08,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:08,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95152820] [2024-06-04 14:18:08,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:08,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:08,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:08,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:08,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:08,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:08,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 317 transitions, 4062 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:08,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:08,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:08,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:08,971 INFO L124 PetriNetUnfolderBase]: 2033/3505 cut-off events. [2024-06-04 14:18:08,971 INFO L125 PetriNetUnfolderBase]: For 163727/163727 co-relation queries the response was YES. [2024-06-04 14:18:08,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21494 conditions, 3505 events. 2033/3505 cut-off events. For 163727/163727 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22272 event pairs, 397 based on Foata normal form. 4/3506 useless extension candidates. Maximal degree in co-relation 21377. Up to 3067 conditions per place. [2024-06-04 14:18:09,009 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 287 selfloop transitions, 46 changer transitions 0/340 dead transitions. [2024-06-04 14:18:09,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 340 transitions, 4840 flow [2024-06-04 14:18:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:18:09,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:18:09,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 14:18:09,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 14:18:09,011 INFO L175 Difference]: Start difference. First operand has 242 places, 317 transitions, 4062 flow. Second operand 6 states and 149 transitions. [2024-06-04 14:18:09,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 340 transitions, 4840 flow [2024-06-04 14:18:09,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 340 transitions, 4648 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-04 14:18:09,368 INFO L231 Difference]: Finished difference. Result has 244 places, 320 transitions, 4036 flow [2024-06-04 14:18:09,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3876, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4036, PETRI_PLACES=244, PETRI_TRANSITIONS=320} [2024-06-04 14:18:09,369 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-04 14:18:09,369 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 320 transitions, 4036 flow [2024-06-04 14:18:09,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:09,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:09,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:09,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 14:18:09,370 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:09,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:09,370 INFO L85 PathProgramCache]: Analyzing trace with hash 690133763, now seen corresponding path program 4 times [2024-06-04 14:18:09,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:09,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570066791] [2024-06-04 14:18:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:09,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:09,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:09,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570066791] [2024-06-04 14:18:09,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570066791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:09,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:09,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:09,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834436529] [2024-06-04 14:18:09,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:09,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:09,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:09,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:09,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:09,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:09,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 320 transitions, 4036 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:09,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:09,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:09,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:09,996 INFO L124 PetriNetUnfolderBase]: 2065/3559 cut-off events. [2024-06-04 14:18:09,997 INFO L125 PetriNetUnfolderBase]: For 166951/166951 co-relation queries the response was YES. [2024-06-04 14:18:10,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21810 conditions, 3559 events. 2065/3559 cut-off events. For 166951/166951 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 22634 event pairs, 396 based on Foata normal form. 4/3560 useless extension candidates. Maximal degree in co-relation 21692. Up to 3060 conditions per place. [2024-06-04 14:18:10,034 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 294 selfloop transitions, 44 changer transitions 0/345 dead transitions. [2024-06-04 14:18:10,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 345 transitions, 4990 flow [2024-06-04 14:18:10,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:18:10,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:18:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 14:18:10,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 14:18:10,035 INFO L175 Difference]: Start difference. First operand has 244 places, 320 transitions, 4036 flow. Second operand 6 states and 147 transitions. [2024-06-04 14:18:10,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 345 transitions, 4990 flow [2024-06-04 14:18:10,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 345 transitions, 4852 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 14:18:10,408 INFO L231 Difference]: Finished difference. Result has 247 places, 326 transitions, 4129 flow [2024-06-04 14:18:10,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4129, PETRI_PLACES=247, PETRI_TRANSITIONS=326} [2024-06-04 14:18:10,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-04 14:18:10,409 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 326 transitions, 4129 flow [2024-06-04 14:18:10,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:10,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:10,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:10,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 14:18:10,410 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:10,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1377285683, now seen corresponding path program 1 times [2024-06-04 14:18:10,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:10,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331366040] [2024-06-04 14:18:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:10,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:10,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:10,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331366040] [2024-06-04 14:18:10,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331366040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:10,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:10,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:10,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552922286] [2024-06-04 14:18:10,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:10,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:10,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:10,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:10,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:10,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 326 transitions, 4129 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:10,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:10,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:10,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:11,072 INFO L124 PetriNetUnfolderBase]: 2094/3600 cut-off events. [2024-06-04 14:18:11,072 INFO L125 PetriNetUnfolderBase]: For 179641/179641 co-relation queries the response was YES. [2024-06-04 14:18:11,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22403 conditions, 3600 events. 2094/3600 cut-off events. For 179641/179641 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 22948 event pairs, 374 based on Foata normal form. 4/3596 useless extension candidates. Maximal degree in co-relation 22283. Up to 3024 conditions per place. [2024-06-04 14:18:11,110 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 83 changer transitions 0/355 dead transitions. [2024-06-04 14:18:11,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 355 transitions, 5105 flow [2024-06-04 14:18:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:18:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:18:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 14:18:11,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 14:18:11,111 INFO L175 Difference]: Start difference. First operand has 247 places, 326 transitions, 4129 flow. Second operand 7 states and 170 transitions. [2024-06-04 14:18:11,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 355 transitions, 5105 flow [2024-06-04 14:18:11,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 355 transitions, 4982 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-04 14:18:11,441 INFO L231 Difference]: Finished difference. Result has 252 places, 332 transitions, 4292 flow [2024-06-04 14:18:11,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4006, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4292, PETRI_PLACES=252, PETRI_TRANSITIONS=332} [2024-06-04 14:18:11,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-04 14:18:11,442 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 332 transitions, 4292 flow [2024-06-04 14:18:11,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:11,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:11,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:11,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 14:18:11,442 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:11,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:11,443 INFO L85 PathProgramCache]: Analyzing trace with hash -35646355, now seen corresponding path program 2 times [2024-06-04 14:18:11,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:11,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137081764] [2024-06-04 14:18:11,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:11,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:11,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:11,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137081764] [2024-06-04 14:18:11,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137081764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:11,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:11,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:11,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747554312] [2024-06-04 14:18:11,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:11,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:11,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:11,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:11,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:11,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:11,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 332 transitions, 4292 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:11,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:11,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:11,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:12,120 INFO L124 PetriNetUnfolderBase]: 2110/3619 cut-off events. [2024-06-04 14:18:12,121 INFO L125 PetriNetUnfolderBase]: For 184785/184785 co-relation queries the response was YES. [2024-06-04 14:18:12,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22768 conditions, 3619 events. 2110/3619 cut-off events. For 184785/184785 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23067 event pairs, 431 based on Foata normal form. 4/3615 useless extension candidates. Maximal degree in co-relation 22646. Up to 3116 conditions per place. [2024-06-04 14:18:12,153 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 268 selfloop transitions, 78 changer transitions 0/353 dead transitions. [2024-06-04 14:18:12,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 353 transitions, 5088 flow [2024-06-04 14:18:12,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:18:12,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:18:12,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 14:18:12,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-04 14:18:12,154 INFO L175 Difference]: Start difference. First operand has 252 places, 332 transitions, 4292 flow. Second operand 7 states and 165 transitions. [2024-06-04 14:18:12,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 353 transitions, 5088 flow [2024-06-04 14:18:12,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 353 transitions, 4898 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-04 14:18:12,512 INFO L231 Difference]: Finished difference. Result has 256 places, 335 transitions, 4330 flow [2024-06-04 14:18:12,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4330, PETRI_PLACES=256, PETRI_TRANSITIONS=335} [2024-06-04 14:18:12,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-04 14:18:12,513 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 335 transitions, 4330 flow [2024-06-04 14:18:12,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:12,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:12,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:12,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 14:18:12,513 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:12,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:12,514 INFO L85 PathProgramCache]: Analyzing trace with hash 82441325, now seen corresponding path program 3 times [2024-06-04 14:18:12,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:12,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221443092] [2024-06-04 14:18:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:12,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:12,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:12,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221443092] [2024-06-04 14:18:12,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221443092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:12,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:12,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:12,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630652096] [2024-06-04 14:18:12,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:12,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:12,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:12,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:12,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:12,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:12,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 335 transitions, 4330 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:12,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:12,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:12,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:13,192 INFO L124 PetriNetUnfolderBase]: 2126/3648 cut-off events. [2024-06-04 14:18:13,192 INFO L125 PetriNetUnfolderBase]: For 189509/189509 co-relation queries the response was YES. [2024-06-04 14:18:13,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22941 conditions, 3648 events. 2126/3648 cut-off events. For 189509/189509 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 23264 event pairs, 415 based on Foata normal form. 4/3645 useless extension candidates. Maximal degree in co-relation 22817. Up to 3215 conditions per place. [2024-06-04 14:18:13,229 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 307 selfloop transitions, 39 changer transitions 0/353 dead transitions. [2024-06-04 14:18:13,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 353 transitions, 5098 flow [2024-06-04 14:18:13,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:18:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:18:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-04 14:18:13,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-04 14:18:13,230 INFO L175 Difference]: Start difference. First operand has 256 places, 335 transitions, 4330 flow. Second operand 7 states and 160 transitions. [2024-06-04 14:18:13,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 353 transitions, 5098 flow [2024-06-04 14:18:13,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 353 transitions, 4924 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:18:13,593 INFO L231 Difference]: Finished difference. Result has 258 places, 338 transitions, 4286 flow [2024-06-04 14:18:13,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4286, PETRI_PLACES=258, PETRI_TRANSITIONS=338} [2024-06-04 14:18:13,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-04 14:18:13,594 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 338 transitions, 4286 flow [2024-06-04 14:18:13,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:13,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:13,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:13,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 14:18:13,594 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:13,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:13,595 INFO L85 PathProgramCache]: Analyzing trace with hash 82626023, now seen corresponding path program 1 times [2024-06-04 14:18:13,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:13,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033800431] [2024-06-04 14:18:13,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:13,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:13,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:13,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033800431] [2024-06-04 14:18:13,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033800431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:13,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:13,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:13,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76167821] [2024-06-04 14:18:13,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:13,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:13,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:13,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:13,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:13,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:13,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 338 transitions, 4286 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:13,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:13,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:13,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:14,232 INFO L124 PetriNetUnfolderBase]: 2142/3671 cut-off events. [2024-06-04 14:18:14,232 INFO L125 PetriNetUnfolderBase]: For 195566/195566 co-relation queries the response was YES. [2024-06-04 14:18:14,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23123 conditions, 3671 events. 2142/3671 cut-off events. For 195566/195566 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23394 event pairs, 424 based on Foata normal form. 4/3668 useless extension candidates. Maximal degree in co-relation 22998. Up to 3190 conditions per place. [2024-06-04 14:18:14,270 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 67 changer transitions 0/356 dead transitions. [2024-06-04 14:18:14,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 356 transitions, 5086 flow [2024-06-04 14:18:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:18:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:18:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-04 14:18:14,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-04 14:18:14,272 INFO L175 Difference]: Start difference. First operand has 258 places, 338 transitions, 4286 flow. Second operand 7 states and 162 transitions. [2024-06-04 14:18:14,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 356 transitions, 5086 flow [2024-06-04 14:18:14,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 356 transitions, 4984 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 14:18:14,746 INFO L231 Difference]: Finished difference. Result has 260 places, 341 transitions, 4396 flow [2024-06-04 14:18:14,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4396, PETRI_PLACES=260, PETRI_TRANSITIONS=341} [2024-06-04 14:18:14,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-04 14:18:14,747 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 341 transitions, 4396 flow [2024-06-04 14:18:14,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:14,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:14,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:14,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 14:18:14,748 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:14,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:14,748 INFO L85 PathProgramCache]: Analyzing trace with hash 612740723, now seen corresponding path program 4 times [2024-06-04 14:18:14,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:14,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6256060] [2024-06-04 14:18:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:14,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:14,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:14,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6256060] [2024-06-04 14:18:14,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6256060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:14,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:14,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:14,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138510672] [2024-06-04 14:18:14,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:14,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:14,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:14,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:14,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:14,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:14,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 341 transitions, 4396 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:14,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:14,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:14,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:15,522 INFO L124 PetriNetUnfolderBase]: 2132/3663 cut-off events. [2024-06-04 14:18:15,522 INFO L125 PetriNetUnfolderBase]: For 194226/194226 co-relation queries the response was YES. [2024-06-04 14:18:15,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23017 conditions, 3663 events. 2132/3663 cut-off events. For 194226/194226 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23406 event pairs, 358 based on Foata normal form. 4/3660 useless extension candidates. Maximal degree in co-relation 22891. Up to 3115 conditions per place. [2024-06-04 14:18:15,564 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 76 changer transitions 0/365 dead transitions. [2024-06-04 14:18:15,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 365 transitions, 5172 flow [2024-06-04 14:18:15,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:18:15,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:18:15,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 14:18:15,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 14:18:15,565 INFO L175 Difference]: Start difference. First operand has 260 places, 341 transitions, 4396 flow. Second operand 7 states and 171 transitions. [2024-06-04 14:18:15,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 365 transitions, 5172 flow [2024-06-04 14:18:15,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 365 transitions, 4966 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-04 14:18:15,924 INFO L231 Difference]: Finished difference. Result has 262 places, 341 transitions, 4357 flow [2024-06-04 14:18:15,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4357, PETRI_PLACES=262, PETRI_TRANSITIONS=341} [2024-06-04 14:18:15,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-04 14:18:15,924 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 341 transitions, 4357 flow [2024-06-04 14:18:15,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:15,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:15,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:15,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 14:18:15,925 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:15,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:15,925 INFO L85 PathProgramCache]: Analyzing trace with hash 681569827, now seen corresponding path program 2 times [2024-06-04 14:18:15,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:15,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502112566] [2024-06-04 14:18:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:15,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:16,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:16,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502112566] [2024-06-04 14:18:16,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502112566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:16,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:16,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:16,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923124813] [2024-06-04 14:18:16,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:16,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:16,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:16,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:16,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:16,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:16,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 341 transitions, 4357 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:16,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:16,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:16,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:16,593 INFO L124 PetriNetUnfolderBase]: 2148/3689 cut-off events. [2024-06-04 14:18:16,594 INFO L125 PetriNetUnfolderBase]: For 197518/197518 co-relation queries the response was YES. [2024-06-04 14:18:16,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23179 conditions, 3689 events. 2148/3689 cut-off events. For 197518/197518 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23499 event pairs, 400 based on Foata normal form. 4/3690 useless extension candidates. Maximal degree in co-relation 23052. Up to 3240 conditions per place. [2024-06-04 14:18:16,633 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 311 selfloop transitions, 46 changer transitions 0/364 dead transitions. [2024-06-04 14:18:16,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 364 transitions, 5161 flow [2024-06-04 14:18:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:18:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:18:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 14:18:16,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 14:18:16,635 INFO L175 Difference]: Start difference. First operand has 262 places, 341 transitions, 4357 flow. Second operand 6 states and 149 transitions. [2024-06-04 14:18:16,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 364 transitions, 5161 flow [2024-06-04 14:18:16,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 364 transitions, 4997 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 14:18:16,985 INFO L231 Difference]: Finished difference. Result has 262 places, 344 transitions, 4337 flow [2024-06-04 14:18:16,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4193, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4337, PETRI_PLACES=262, PETRI_TRANSITIONS=344} [2024-06-04 14:18:16,986 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-04 14:18:16,986 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 344 transitions, 4337 flow [2024-06-04 14:18:16,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:16,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:16,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:16,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 14:18:16,987 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:16,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:16,987 INFO L85 PathProgramCache]: Analyzing trace with hash 453668677, now seen corresponding path program 3 times [2024-06-04 14:18:16,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:16,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121211429] [2024-06-04 14:18:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:16,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:17,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:17,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121211429] [2024-06-04 14:18:17,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121211429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:17,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:17,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:17,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187808462] [2024-06-04 14:18:17,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:17,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:17,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:17,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:17,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:17,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:17,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 344 transitions, 4337 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:17,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:17,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:17,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:17,676 INFO L124 PetriNetUnfolderBase]: 2151/3686 cut-off events. [2024-06-04 14:18:17,676 INFO L125 PetriNetUnfolderBase]: For 195644/195644 co-relation queries the response was YES. [2024-06-04 14:18:17,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23018 conditions, 3686 events. 2151/3686 cut-off events. For 195644/195644 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23505 event pairs, 425 based on Foata normal form. 4/3683 useless extension candidates. Maximal degree in co-relation 22890. Up to 3193 conditions per place. [2024-06-04 14:18:17,711 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 283 selfloop transitions, 71 changer transitions 0/361 dead transitions. [2024-06-04 14:18:17,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 361 transitions, 5151 flow [2024-06-04 14:18:17,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:18:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:18:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 14:18:17,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-04 14:18:17,712 INFO L175 Difference]: Start difference. First operand has 262 places, 344 transitions, 4337 flow. Second operand 6 states and 143 transitions. [2024-06-04 14:18:17,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 361 transitions, 5151 flow [2024-06-04 14:18:18,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 361 transitions, 5039 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 14:18:18,120 INFO L231 Difference]: Finished difference. Result has 264 places, 347 transitions, 4455 flow [2024-06-04 14:18:18,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4225, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4455, PETRI_PLACES=264, PETRI_TRANSITIONS=347} [2024-06-04 14:18:18,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-04 14:18:18,121 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 347 transitions, 4455 flow [2024-06-04 14:18:18,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:18,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:18,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:18,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 14:18:18,122 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:18,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:18,122 INFO L85 PathProgramCache]: Analyzing trace with hash 460163797, now seen corresponding path program 4 times [2024-06-04 14:18:18,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:18,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432647085] [2024-06-04 14:18:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:18,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:18,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:18,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432647085] [2024-06-04 14:18:18,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432647085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:18,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:18,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:18,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915907637] [2024-06-04 14:18:18,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:18,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:18,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:18,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:18,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:18,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:18,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 347 transitions, 4455 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:18,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:18,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:18,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:18,790 INFO L124 PetriNetUnfolderBase]: 2138/3666 cut-off events. [2024-06-04 14:18:18,790 INFO L125 PetriNetUnfolderBase]: For 191708/191708 co-relation queries the response was YES. [2024-06-04 14:18:18,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22871 conditions, 3666 events. 2138/3666 cut-off events. For 191708/191708 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23317 event pairs, 394 based on Foata normal form. 4/3667 useless extension candidates. Maximal degree in co-relation 22742. Up to 3168 conditions per place. [2024-06-04 14:18:18,829 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 311 selfloop transitions, 47 changer transitions 0/365 dead transitions. [2024-06-04 14:18:18,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 365 transitions, 5215 flow [2024-06-04 14:18:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:18:18,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:18:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 14:18:18,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 14:18:18,830 INFO L175 Difference]: Start difference. First operand has 264 places, 347 transitions, 4455 flow. Second operand 6 states and 146 transitions. [2024-06-04 14:18:18,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 365 transitions, 5215 flow [2024-06-04 14:18:19,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 365 transitions, 4995 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-04 14:18:19,306 INFO L231 Difference]: Finished difference. Result has 266 places, 347 transitions, 4337 flow [2024-06-04 14:18:19,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4337, PETRI_PLACES=266, PETRI_TRANSITIONS=347} [2024-06-04 14:18:19,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-04 14:18:19,306 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 347 transitions, 4337 flow [2024-06-04 14:18:19,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:19,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:19,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:19,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 14:18:19,307 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:19,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:19,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1064643134, now seen corresponding path program 1 times [2024-06-04 14:18:19,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:19,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973735598] [2024-06-04 14:18:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:19,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:19,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:19,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973735598] [2024-06-04 14:18:19,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973735598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:19,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:19,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:18:19,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898217471] [2024-06-04 14:18:19,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:19,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:18:19,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:19,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:18:19,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:18:19,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:19,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 347 transitions, 4337 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:19,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:19,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:19,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:20,048 INFO L124 PetriNetUnfolderBase]: 2151/3690 cut-off events. [2024-06-04 14:18:20,048 INFO L125 PetriNetUnfolderBase]: For 187827/187833 co-relation queries the response was YES. [2024-06-04 14:18:20,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22754 conditions, 3690 events. 2151/3690 cut-off events. For 187827/187833 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23551 event pairs, 418 based on Foata normal form. 5/3690 useless extension candidates. Maximal degree in co-relation 22624. Up to 3204 conditions per place. [2024-06-04 14:18:20,087 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 73 changer transitions 0/374 dead transitions. [2024-06-04 14:18:20,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 374 transitions, 5333 flow [2024-06-04 14:18:20,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:18:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:18:20,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-04 14:18:20,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-04 14:18:20,089 INFO L175 Difference]: Start difference. First operand has 266 places, 347 transitions, 4337 flow. Second operand 10 states and 219 transitions. [2024-06-04 14:18:20,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 374 transitions, 5333 flow [2024-06-04 14:18:20,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 374 transitions, 5220 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:18:20,609 INFO L231 Difference]: Finished difference. Result has 272 places, 353 transitions, 4477 flow [2024-06-04 14:18:20,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4224, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4477, PETRI_PLACES=272, PETRI_TRANSITIONS=353} [2024-06-04 14:18:20,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-04 14:18:20,610 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 353 transitions, 4477 flow [2024-06-04 14:18:20,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:20,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:20,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:20,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 14:18:20,611 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:20,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:20,611 INFO L85 PathProgramCache]: Analyzing trace with hash -837720534, now seen corresponding path program 2 times [2024-06-04 14:18:20,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:20,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777938017] [2024-06-04 14:18:20,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:20,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:20,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:20,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777938017] [2024-06-04 14:18:20,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777938017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:20,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:20,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:20,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115116056] [2024-06-04 14:18:20,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:20,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:20,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:20,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:20,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:20,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:20,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 353 transitions, 4477 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:20,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:20,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:20,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:21,272 INFO L124 PetriNetUnfolderBase]: 2180/3734 cut-off events. [2024-06-04 14:18:21,272 INFO L125 PetriNetUnfolderBase]: For 201338/201344 co-relation queries the response was YES. [2024-06-04 14:18:21,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23366 conditions, 3734 events. 2180/3734 cut-off events. For 201338/201344 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 23842 event pairs, 443 based on Foata normal form. 5/3731 useless extension candidates. Maximal degree in co-relation 23234. Up to 3077 conditions per place. [2024-06-04 14:18:21,313 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 240 selfloop transitions, 137 changer transitions 0/384 dead transitions. [2024-06-04 14:18:21,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 384 transitions, 5723 flow [2024-06-04 14:18:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:18:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:18:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 14:18:21,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-04 14:18:21,315 INFO L175 Difference]: Start difference. First operand has 272 places, 353 transitions, 4477 flow. Second operand 7 states and 166 transitions. [2024-06-04 14:18:21,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 384 transitions, 5723 flow [2024-06-04 14:18:21,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 384 transitions, 5538 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 14:18:21,926 INFO L231 Difference]: Finished difference. Result has 272 places, 365 transitions, 4758 flow [2024-06-04 14:18:21,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4292, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4758, PETRI_PLACES=272, PETRI_TRANSITIONS=365} [2024-06-04 14:18:21,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-04 14:18:21,926 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 365 transitions, 4758 flow [2024-06-04 14:18:21,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:21,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:21,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:21,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 14:18:21,927 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:21,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:21,927 INFO L85 PathProgramCache]: Analyzing trace with hash 123051628, now seen corresponding path program 3 times [2024-06-04 14:18:21,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:21,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191374713] [2024-06-04 14:18:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:21,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:22,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:22,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191374713] [2024-06-04 14:18:22,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191374713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:22,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:22,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:22,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774082390] [2024-06-04 14:18:22,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:22,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:22,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:22,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:22,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:22,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:22,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 365 transitions, 4758 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:22,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:22,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:22,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:22,586 INFO L124 PetriNetUnfolderBase]: 2177/3734 cut-off events. [2024-06-04 14:18:22,587 INFO L125 PetriNetUnfolderBase]: For 203880/203886 co-relation queries the response was YES. [2024-06-04 14:18:22,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23500 conditions, 3734 events. 2177/3734 cut-off events. For 203880/203886 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 23876 event pairs, 448 based on Foata normal form. 1/3728 useless extension candidates. Maximal degree in co-relation 23367. Up to 3074 conditions per place. [2024-06-04 14:18:22,627 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 238 selfloop transitions, 143 changer transitions 0/388 dead transitions. [2024-06-04 14:18:22,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 388 transitions, 5972 flow [2024-06-04 14:18:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:18:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:18:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 14:18:22,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-04 14:18:22,628 INFO L175 Difference]: Start difference. First operand has 272 places, 365 transitions, 4758 flow. Second operand 7 states and 172 transitions. [2024-06-04 14:18:22,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 388 transitions, 5972 flow [2024-06-04 14:18:23,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 388 transitions, 5759 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-04 14:18:23,213 INFO L231 Difference]: Finished difference. Result has 276 places, 365 transitions, 4837 flow [2024-06-04 14:18:23,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4545, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4837, PETRI_PLACES=276, PETRI_TRANSITIONS=365} [2024-06-04 14:18:23,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-04 14:18:23,214 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 365 transitions, 4837 flow [2024-06-04 14:18:23,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:23,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:23,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:23,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 14:18:23,214 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:23,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:23,215 INFO L85 PathProgramCache]: Analyzing trace with hash -619396338, now seen corresponding path program 4 times [2024-06-04 14:18:23,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:23,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968377339] [2024-06-04 14:18:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:23,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:23,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:23,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968377339] [2024-06-04 14:18:23,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968377339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:23,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:23,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:18:23,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87959976] [2024-06-04 14:18:23,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:23,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:18:23,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:23,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:18:23,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:18:23,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:23,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 365 transitions, 4837 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:23,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:23,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:23,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:24,032 INFO L124 PetriNetUnfolderBase]: 2182/3727 cut-off events. [2024-06-04 14:18:24,033 INFO L125 PetriNetUnfolderBase]: For 210850/210850 co-relation queries the response was YES. [2024-06-04 14:18:24,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23659 conditions, 3727 events. 2182/3727 cut-off events. For 210850/210850 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 23775 event pairs, 446 based on Foata normal form. 1/3720 useless extension candidates. Maximal degree in co-relation 23525. Up to 3080 conditions per place. [2024-06-04 14:18:24,067 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 147 changer transitions 0/388 dead transitions. [2024-06-04 14:18:24,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 388 transitions, 5966 flow [2024-06-04 14:18:24,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:18:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:18:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 14:18:24,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 14:18:24,068 INFO L175 Difference]: Start difference. First operand has 276 places, 365 transitions, 4837 flow. Second operand 8 states and 188 transitions. [2024-06-04 14:18:24,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 388 transitions, 5966 flow [2024-06-04 14:18:24,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 388 transitions, 5503 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 14:18:24,700 INFO L231 Difference]: Finished difference. Result has 278 places, 368 transitions, 4725 flow [2024-06-04 14:18:24,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4383, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4725, PETRI_PLACES=278, PETRI_TRANSITIONS=368} [2024-06-04 14:18:24,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-04 14:18:24,716 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 368 transitions, 4725 flow [2024-06-04 14:18:24,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:24,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:24,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:24,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 14:18:24,717 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:24,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:24,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1562947692, now seen corresponding path program 5 times [2024-06-04 14:18:24,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:24,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641111375] [2024-06-04 14:18:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:24,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:24,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:24,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641111375] [2024-06-04 14:18:24,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641111375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:24,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:24,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:24,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464290313] [2024-06-04 14:18:24,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:24,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:24,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:24,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:24,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:24,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:24,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 368 transitions, 4725 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:24,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:24,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:24,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:25,446 INFO L124 PetriNetUnfolderBase]: 2187/3754 cut-off events. [2024-06-04 14:18:25,447 INFO L125 PetriNetUnfolderBase]: For 213963/213969 co-relation queries the response was YES. [2024-06-04 14:18:25,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23725 conditions, 3754 events. 2187/3754 cut-off events. For 213963/213969 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24088 event pairs, 419 based on Foata normal form. 5/3754 useless extension candidates. Maximal degree in co-relation 23591. Up to 3256 conditions per place. [2024-06-04 14:18:25,493 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 73 changer transitions 0/391 dead transitions. [2024-06-04 14:18:25,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 391 transitions, 5713 flow [2024-06-04 14:18:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:18:25,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:18:25,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-04 14:18:25,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-04 14:18:25,495 INFO L175 Difference]: Start difference. First operand has 278 places, 368 transitions, 4725 flow. Second operand 9 states and 201 transitions. [2024-06-04 14:18:25,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 391 transitions, 5713 flow [2024-06-04 14:18:26,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 391 transitions, 5474 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 14:18:26,226 INFO L231 Difference]: Finished difference. Result has 282 places, 371 transitions, 4674 flow [2024-06-04 14:18:26,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4489, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4674, PETRI_PLACES=282, PETRI_TRANSITIONS=371} [2024-06-04 14:18:26,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-04 14:18:26,227 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 371 transitions, 4674 flow [2024-06-04 14:18:26,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:26,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:26,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:26,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 14:18:26,227 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:26,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash -453935574, now seen corresponding path program 6 times [2024-06-04 14:18:26,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:26,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12963481] [2024-06-04 14:18:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:26,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:26,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:26,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12963481] [2024-06-04 14:18:26,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12963481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:26,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:26,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:26,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808774318] [2024-06-04 14:18:26,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:26,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:26,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:26,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:26,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:26,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:26,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 371 transitions, 4674 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:26,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:26,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:26,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:26,909 INFO L124 PetriNetUnfolderBase]: 2184/3744 cut-off events. [2024-06-04 14:18:26,909 INFO L125 PetriNetUnfolderBase]: For 218807/218813 co-relation queries the response was YES. [2024-06-04 14:18:26,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23502 conditions, 3744 events. 2184/3744 cut-off events. For 218807/218813 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 23979 event pairs, 443 based on Foata normal form. 5/3741 useless extension candidates. Maximal degree in co-relation 23366. Up to 3083 conditions per place. [2024-06-04 14:18:26,951 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 242 selfloop transitions, 137 changer transitions 0/386 dead transitions. [2024-06-04 14:18:26,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 386 transitions, 5606 flow [2024-06-04 14:18:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:18:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:18:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 14:18:26,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-04 14:18:26,952 INFO L175 Difference]: Start difference. First operand has 282 places, 371 transitions, 4674 flow. Second operand 7 states and 163 transitions. [2024-06-04 14:18:26,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 386 transitions, 5606 flow [2024-06-04 14:18:27,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 386 transitions, 5454 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 14:18:27,766 INFO L231 Difference]: Finished difference. Result has 282 places, 371 transitions, 4802 flow [2024-06-04 14:18:27,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4522, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4802, PETRI_PLACES=282, PETRI_TRANSITIONS=371} [2024-06-04 14:18:27,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-04 14:18:27,766 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 371 transitions, 4802 flow [2024-06-04 14:18:27,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:27,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:27,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:27,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 14:18:27,767 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:27,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:27,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1209614874, now seen corresponding path program 7 times [2024-06-04 14:18:27,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:27,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401684293] [2024-06-04 14:18:27,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:27,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:27,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:27,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401684293] [2024-06-04 14:18:27,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401684293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:27,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:27,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:27,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950733531] [2024-06-04 14:18:27,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:27,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:27,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:27,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:27,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:27,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:27,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 371 transitions, 4802 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:27,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:27,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:27,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:28,457 INFO L124 PetriNetUnfolderBase]: 2181/3746 cut-off events. [2024-06-04 14:18:28,457 INFO L125 PetriNetUnfolderBase]: For 221418/221424 co-relation queries the response was YES. [2024-06-04 14:18:28,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23679 conditions, 3746 events. 2181/3746 cut-off events. For 221418/221424 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24044 event pairs, 419 based on Foata normal form. 5/3746 useless extension candidates. Maximal degree in co-relation 23542. Up to 3249 conditions per place. [2024-06-04 14:18:28,500 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 72 changer transitions 0/388 dead transitions. [2024-06-04 14:18:28,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 388 transitions, 5606 flow [2024-06-04 14:18:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:18:28,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:18:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 14:18:28,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-04 14:18:28,502 INFO L175 Difference]: Start difference. First operand has 282 places, 371 transitions, 4802 flow. Second operand 7 states and 165 transitions. [2024-06-04 14:18:28,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 388 transitions, 5606 flow [2024-06-04 14:18:29,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 388 transitions, 5163 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 14:18:29,203 INFO L231 Difference]: Finished difference. Result has 282 places, 371 transitions, 4509 flow [2024-06-04 14:18:29,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4359, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4509, PETRI_PLACES=282, PETRI_TRANSITIONS=371} [2024-06-04 14:18:29,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-04 14:18:29,203 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 371 transitions, 4509 flow [2024-06-04 14:18:29,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:29,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:29,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:29,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 14:18:29,204 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:29,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:29,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2066228692, now seen corresponding path program 8 times [2024-06-04 14:18:29,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:29,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015849452] [2024-06-04 14:18:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:29,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:29,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:29,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015849452] [2024-06-04 14:18:29,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015849452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:29,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:29,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:29,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340299633] [2024-06-04 14:18:29,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:29,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:29,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:29,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:29,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:29,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:29,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 371 transitions, 4509 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:29,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:29,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:29,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:29,911 INFO L124 PetriNetUnfolderBase]: 2202/3781 cut-off events. [2024-06-04 14:18:29,912 INFO L125 PetriNetUnfolderBase]: For 230413/230419 co-relation queries the response was YES. [2024-06-04 14:18:29,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23757 conditions, 3781 events. 2202/3781 cut-off events. For 230413/230419 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 24289 event pairs, 419 based on Foata normal form. 5/3781 useless extension candidates. Maximal degree in co-relation 23621. Up to 3137 conditions per place. [2024-06-04 14:18:29,955 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 151 changer transitions 0/408 dead transitions. [2024-06-04 14:18:29,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 408 transitions, 5934 flow [2024-06-04 14:18:29,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:18:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:18:29,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 14:18:29,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 14:18:29,957 INFO L175 Difference]: Start difference. First operand has 282 places, 371 transitions, 4509 flow. Second operand 9 states and 213 transitions. [2024-06-04 14:18:29,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 408 transitions, 5934 flow [2024-06-04 14:18:30,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 408 transitions, 5790 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 14:18:30,732 INFO L231 Difference]: Finished difference. Result has 285 places, 380 transitions, 4806 flow [2024-06-04 14:18:30,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4806, PETRI_PLACES=285, PETRI_TRANSITIONS=380} [2024-06-04 14:18:30,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-04 14:18:30,732 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 380 transitions, 4806 flow [2024-06-04 14:18:30,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:30,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:30,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:30,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 14:18:30,733 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:30,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:30,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2066223112, now seen corresponding path program 9 times [2024-06-04 14:18:30,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:30,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218770141] [2024-06-04 14:18:30,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:30,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:30,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:30,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218770141] [2024-06-04 14:18:30,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218770141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:30,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:30,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:30,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036137413] [2024-06-04 14:18:30,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:30,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:30,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:30,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:30,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:30,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:30,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 380 transitions, 4806 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:30,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:30,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:30,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:31,474 INFO L124 PetriNetUnfolderBase]: 2199/3777 cut-off events. [2024-06-04 14:18:31,475 INFO L125 PetriNetUnfolderBase]: For 234361/234367 co-relation queries the response was YES. [2024-06-04 14:18:31,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23984 conditions, 3777 events. 2199/3777 cut-off events. For 234361/234367 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 24239 event pairs, 419 based on Foata normal form. 5/3777 useless extension candidates. Maximal degree in co-relation 23847. Up to 3134 conditions per place. [2024-06-04 14:18:31,514 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 146 changer transitions 0/410 dead transitions. [2024-06-04 14:18:31,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 410 transitions, 6118 flow [2024-06-04 14:18:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:18:31,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:18:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 14:18:31,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-04 14:18:31,515 INFO L175 Difference]: Start difference. First operand has 285 places, 380 transitions, 4806 flow. Second operand 8 states and 199 transitions. [2024-06-04 14:18:31,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 410 transitions, 6118 flow [2024-06-04 14:18:32,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 410 transitions, 5748 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-04 14:18:32,360 INFO L231 Difference]: Finished difference. Result has 286 places, 380 transitions, 4745 flow [2024-06-04 14:18:32,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4745, PETRI_PLACES=286, PETRI_TRANSITIONS=380} [2024-06-04 14:18:32,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-04 14:18:32,361 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 380 transitions, 4745 flow [2024-06-04 14:18:32,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:32,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:32,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:32,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 14:18:32,362 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:32,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:32,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2074497322, now seen corresponding path program 10 times [2024-06-04 14:18:32,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:32,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968230687] [2024-06-04 14:18:32,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:32,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:32,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:32,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968230687] [2024-06-04 14:18:32,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968230687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:32,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:32,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:32,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095709880] [2024-06-04 14:18:32,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:32,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:32,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:32,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:32,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:32,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:32,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 380 transitions, 4745 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:32,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:32,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:32,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:33,134 INFO L124 PetriNetUnfolderBase]: 2196/3767 cut-off events. [2024-06-04 14:18:33,135 INFO L125 PetriNetUnfolderBase]: For 232597/232603 co-relation queries the response was YES. [2024-06-04 14:18:33,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23813 conditions, 3767 events. 2196/3767 cut-off events. For 232597/232603 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 24208 event pairs, 443 based on Foata normal form. 5/3764 useless extension candidates. Maximal degree in co-relation 23676. Up to 3131 conditions per place. [2024-06-04 14:18:33,176 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 261 selfloop transitions, 130 changer transitions 0/398 dead transitions. [2024-06-04 14:18:33,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 398 transitions, 5859 flow [2024-06-04 14:18:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:18:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:18:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 14:18:33,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 14:18:33,177 INFO L175 Difference]: Start difference. First operand has 286 places, 380 transitions, 4745 flow. Second operand 6 states and 148 transitions. [2024-06-04 14:18:33,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 398 transitions, 5859 flow [2024-06-04 14:18:34,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 398 transitions, 5541 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 14:18:34,047 INFO L231 Difference]: Finished difference. Result has 285 places, 380 transitions, 4698 flow [2024-06-04 14:18:34,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4431, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4698, PETRI_PLACES=285, PETRI_TRANSITIONS=380} [2024-06-04 14:18:34,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-04 14:18:34,048 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 380 transitions, 4698 flow [2024-06-04 14:18:34,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:34,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:34,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:34,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 14:18:34,049 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:34,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2080038262, now seen corresponding path program 11 times [2024-06-04 14:18:34,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:34,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227682999] [2024-06-04 14:18:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:34,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:34,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:34,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227682999] [2024-06-04 14:18:34,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227682999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:34,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:34,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:18:34,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203039383] [2024-06-04 14:18:34,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:34,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:18:34,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:34,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:18:34,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:18:34,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:34,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 380 transitions, 4698 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:34,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:34,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:34,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:34,809 INFO L124 PetriNetUnfolderBase]: 2209/3784 cut-off events. [2024-06-04 14:18:34,809 INFO L125 PetriNetUnfolderBase]: For 234028/234028 co-relation queries the response was YES. [2024-06-04 14:18:34,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23956 conditions, 3784 events. 2209/3784 cut-off events. For 234028/234028 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 24265 event pairs, 421 based on Foata normal form. 1/3778 useless extension candidates. Maximal degree in co-relation 23819. Up to 3270 conditions per place. [2024-06-04 14:18:34,851 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 82 changer transitions 0/405 dead transitions. [2024-06-04 14:18:34,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 405 transitions, 5772 flow [2024-06-04 14:18:34,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:18:34,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:18:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-04 14:18:34,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2024-06-04 14:18:34,852 INFO L175 Difference]: Start difference. First operand has 285 places, 380 transitions, 4698 flow. Second operand 11 states and 236 transitions. [2024-06-04 14:18:34,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 405 transitions, 5772 flow [2024-06-04 14:18:35,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 405 transitions, 5490 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 14:18:35,655 INFO L231 Difference]: Finished difference. Result has 292 places, 386 transitions, 4693 flow [2024-06-04 14:18:35,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4428, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4693, PETRI_PLACES=292, PETRI_TRANSITIONS=386} [2024-06-04 14:18:35,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-04 14:18:35,655 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 386 transitions, 4693 flow [2024-06-04 14:18:35,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:35,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:35,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:35,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 14:18:35,656 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:35,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:35,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1739146970, now seen corresponding path program 12 times [2024-06-04 14:18:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:35,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594388250] [2024-06-04 14:18:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:35,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:35,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:35,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594388250] [2024-06-04 14:18:35,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594388250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:35,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:35,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:18:35,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236690478] [2024-06-04 14:18:35,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:35,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:18:35,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:35,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:18:35,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:18:35,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:35,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 386 transitions, 4693 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:35,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:35,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:35,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:36,449 INFO L124 PetriNetUnfolderBase]: 2214/3792 cut-off events. [2024-06-04 14:18:36,449 INFO L125 PetriNetUnfolderBase]: For 239656/239656 co-relation queries the response was YES. [2024-06-04 14:18:36,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23973 conditions, 3792 events. 2214/3792 cut-off events. For 239656/239656 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24365 event pairs, 422 based on Foata normal form. 1/3786 useless extension candidates. Maximal degree in co-relation 23834. Up to 3283 conditions per place. [2024-06-04 14:18:36,493 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 319 selfloop transitions, 78 changer transitions 0/404 dead transitions. [2024-06-04 14:18:36,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 404 transitions, 5571 flow [2024-06-04 14:18:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:18:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:18:36,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 14:18:36,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 14:18:36,495 INFO L175 Difference]: Start difference. First operand has 292 places, 386 transitions, 4693 flow. Second operand 8 states and 182 transitions. [2024-06-04 14:18:36,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 404 transitions, 5571 flow [2024-06-04 14:18:37,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 404 transitions, 5353 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-04 14:18:37,304 INFO L231 Difference]: Finished difference. Result has 292 places, 389 transitions, 4691 flow [2024-06-04 14:18:37,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4496, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4691, PETRI_PLACES=292, PETRI_TRANSITIONS=389} [2024-06-04 14:18:37,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-04 14:18:37,305 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 389 transitions, 4691 flow [2024-06-04 14:18:37,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:37,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:37,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:37,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 14:18:37,305 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:37,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:37,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1733784590, now seen corresponding path program 13 times [2024-06-04 14:18:37,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:37,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879300065] [2024-06-04 14:18:37,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:37,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:37,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:37,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879300065] [2024-06-04 14:18:37,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879300065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:37,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:37,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:18:37,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73859570] [2024-06-04 14:18:37,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:37,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:18:37,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:37,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:18:37,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:18:37,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:37,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 389 transitions, 4691 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:37,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:37,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:37,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:38,085 INFO L124 PetriNetUnfolderBase]: 2211/3789 cut-off events. [2024-06-04 14:18:38,086 INFO L125 PetriNetUnfolderBase]: For 242626/242626 co-relation queries the response was YES. [2024-06-04 14:18:38,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23895 conditions, 3789 events. 2211/3789 cut-off events. For 242626/242626 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24359 event pairs, 421 based on Foata normal form. 1/3783 useless extension candidates. Maximal degree in co-relation 23755. Up to 3273 conditions per place. [2024-06-04 14:18:38,129 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 317 selfloop transitions, 85 changer transitions 0/409 dead transitions. [2024-06-04 14:18:38,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 409 transitions, 5541 flow [2024-06-04 14:18:38,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 14:18:38,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 14:18:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 272 transitions. [2024-06-04 14:18:38,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981684981684982 [2024-06-04 14:18:38,131 INFO L175 Difference]: Start difference. First operand has 292 places, 389 transitions, 4691 flow. Second operand 13 states and 272 transitions. [2024-06-04 14:18:38,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 409 transitions, 5541 flow [2024-06-04 14:18:38,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 409 transitions, 5377 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 14:18:38,993 INFO L231 Difference]: Finished difference. Result has 299 places, 389 transitions, 4703 flow [2024-06-04 14:18:38,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4527, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4703, PETRI_PLACES=299, PETRI_TRANSITIONS=389} [2024-06-04 14:18:38,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-04 14:18:38,994 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 389 transitions, 4703 flow [2024-06-04 14:18:38,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:38,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:38,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:38,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 14:18:38,995 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:38,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:38,995 INFO L85 PathProgramCache]: Analyzing trace with hash -698183360, now seen corresponding path program 14 times [2024-06-04 14:18:38,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:38,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589406393] [2024-06-04 14:18:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:38,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:39,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:39,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589406393] [2024-06-04 14:18:39,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589406393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:39,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:39,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:18:39,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156135719] [2024-06-04 14:18:39,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:39,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:18:39,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:39,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:18:39,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:18:39,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:39,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 389 transitions, 4703 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:39,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:39,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:39,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:39,870 INFO L124 PetriNetUnfolderBase]: 2208/3785 cut-off events. [2024-06-04 14:18:39,871 INFO L125 PetriNetUnfolderBase]: For 245715/245715 co-relation queries the response was YES. [2024-06-04 14:18:39,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23887 conditions, 3785 events. 2208/3785 cut-off events. For 245715/245715 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24331 event pairs, 420 based on Foata normal form. 1/3779 useless extension candidates. Maximal degree in co-relation 23746. Up to 3146 conditions per place. [2024-06-04 14:18:39,917 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 158 changer transitions 0/416 dead transitions. [2024-06-04 14:18:39,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 416 transitions, 6035 flow [2024-06-04 14:18:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:18:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:18:39,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-04 14:18:39,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-04 14:18:39,919 INFO L175 Difference]: Start difference. First operand has 299 places, 389 transitions, 4703 flow. Second operand 11 states and 247 transitions. [2024-06-04 14:18:39,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 416 transitions, 6035 flow [2024-06-04 14:18:40,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 416 transitions, 5855 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-04 14:18:40,877 INFO L231 Difference]: Finished difference. Result has 298 places, 389 transitions, 4849 flow [2024-06-04 14:18:40,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4523, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4849, PETRI_PLACES=298, PETRI_TRANSITIONS=389} [2024-06-04 14:18:40,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-04 14:18:40,877 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 389 transitions, 4849 flow [2024-06-04 14:18:40,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:40,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:40,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:40,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 14:18:40,878 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:40,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:40,879 INFO L85 PathProgramCache]: Analyzing trace with hash -939411082, now seen corresponding path program 15 times [2024-06-04 14:18:40,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:40,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264991828] [2024-06-04 14:18:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:40,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:41,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:41,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264991828] [2024-06-04 14:18:41,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264991828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:41,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:41,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:18:41,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834971412] [2024-06-04 14:18:41,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:41,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:18:41,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:41,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:18:41,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:18:41,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:41,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 389 transitions, 4849 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:41,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:41,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:41,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:41,696 INFO L124 PetriNetUnfolderBase]: 2205/3792 cut-off events. [2024-06-04 14:18:41,696 INFO L125 PetriNetUnfolderBase]: For 249500/249506 co-relation queries the response was YES. [2024-06-04 14:18:41,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24076 conditions, 3792 events. 2205/3792 cut-off events. For 249500/249506 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24417 event pairs, 417 based on Foata normal form. 5/3792 useless extension candidates. Maximal degree in co-relation 23934. Up to 3143 conditions per place. [2024-06-04 14:18:41,743 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 160 changer transitions 0/416 dead transitions. [2024-06-04 14:18:41,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 416 transitions, 5885 flow [2024-06-04 14:18:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:18:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:18:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-04 14:18:41,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452380952380952 [2024-06-04 14:18:41,744 INFO L175 Difference]: Start difference. First operand has 298 places, 389 transitions, 4849 flow. Second operand 10 states and 229 transitions. [2024-06-04 14:18:41,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 416 transitions, 5885 flow [2024-06-04 14:18:42,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 416 transitions, 5585 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-04 14:18:42,750 INFO L231 Difference]: Finished difference. Result has 301 places, 389 transitions, 4881 flow [2024-06-04 14:18:42,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4551, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4881, PETRI_PLACES=301, PETRI_TRANSITIONS=389} [2024-06-04 14:18:42,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-04 14:18:42,751 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 389 transitions, 4881 flow [2024-06-04 14:18:42,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:42,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:42,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:42,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 14:18:42,752 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:42,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash -703278830, now seen corresponding path program 16 times [2024-06-04 14:18:42,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:42,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088784092] [2024-06-04 14:18:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:42,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:42,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:42,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088784092] [2024-06-04 14:18:42,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088784092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:42,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:42,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:18:42,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279476126] [2024-06-04 14:18:42,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:42,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:18:42,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:42,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:18:42,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:18:42,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:42,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 389 transitions, 4881 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:42,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:42,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:42,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:43,493 INFO L124 PetriNetUnfolderBase]: 2210/3789 cut-off events. [2024-06-04 14:18:43,493 INFO L125 PetriNetUnfolderBase]: For 249752/249752 co-relation queries the response was YES. [2024-06-04 14:18:43,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24103 conditions, 3789 events. 2210/3789 cut-off events. For 249752/249752 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24380 event pairs, 422 based on Foata normal form. 1/3783 useless extension candidates. Maximal degree in co-relation 23960. Up to 3149 conditions per place. [2024-06-04 14:18:43,537 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 158 changer transitions 0/414 dead transitions. [2024-06-04 14:18:43,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 414 transitions, 5937 flow [2024-06-04 14:18:43,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:18:43,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:18:43,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 14:18:43,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-04 14:18:43,538 INFO L175 Difference]: Start difference. First operand has 301 places, 389 transitions, 4881 flow. Second operand 8 states and 190 transitions. [2024-06-04 14:18:43,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 414 transitions, 5937 flow [2024-06-04 14:18:44,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 414 transitions, 5559 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-04 14:18:44,465 INFO L231 Difference]: Finished difference. Result has 300 places, 392 transitions, 4867 flow [2024-06-04 14:18:44,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4511, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4867, PETRI_PLACES=300, PETRI_TRANSITIONS=392} [2024-06-04 14:18:44,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-04 14:18:44,465 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 392 transitions, 4867 flow [2024-06-04 14:18:44,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:44,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:44,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:44,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 14:18:44,466 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:44,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:44,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1178343622, now seen corresponding path program 17 times [2024-06-04 14:18:44,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:44,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353955851] [2024-06-04 14:18:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:44,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:44,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:44,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353955851] [2024-06-04 14:18:44,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353955851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:44,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:44,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:18:44,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551146582] [2024-06-04 14:18:44,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:44,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:18:44,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:44,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:18:44,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:18:44,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:44,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 392 transitions, 4867 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:44,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:44,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:44,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:45,237 INFO L124 PetriNetUnfolderBase]: 2207/3786 cut-off events. [2024-06-04 14:18:45,238 INFO L125 PetriNetUnfolderBase]: For 246446/246446 co-relation queries the response was YES. [2024-06-04 14:18:45,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23960 conditions, 3786 events. 2207/3786 cut-off events. For 246446/246446 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24372 event pairs, 420 based on Foata normal form. 1/3780 useless extension candidates. Maximal degree in co-relation 23816. Up to 3146 conditions per place. [2024-06-04 14:18:45,283 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 161 changer transitions 0/419 dead transitions. [2024-06-04 14:18:45,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 419 transitions, 5907 flow [2024-06-04 14:18:45,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 14:18:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 14:18:45,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2024-06-04 14:18:45,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2024-06-04 14:18:45,285 INFO L175 Difference]: Start difference. First operand has 300 places, 392 transitions, 4867 flow. Second operand 13 states and 282 transitions. [2024-06-04 14:18:45,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 419 transitions, 5907 flow [2024-06-04 14:18:46,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 419 transitions, 5642 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 14:18:46,295 INFO L231 Difference]: Finished difference. Result has 307 places, 392 transitions, 4936 flow [2024-06-04 14:18:46,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4604, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4936, PETRI_PLACES=307, PETRI_TRANSITIONS=392} [2024-06-04 14:18:46,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-04 14:18:46,297 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 392 transitions, 4936 flow [2024-06-04 14:18:46,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:46,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:46,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:46,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 14:18:46,297 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:46,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:46,297 INFO L85 PathProgramCache]: Analyzing trace with hash -346395850, now seen corresponding path program 18 times [2024-06-04 14:18:46,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:46,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915985904] [2024-06-04 14:18:46,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:46,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:46,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:46,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915985904] [2024-06-04 14:18:46,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915985904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:46,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:46,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:46,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146043527] [2024-06-04 14:18:46,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:46,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:46,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:46,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:46,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:46,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:46,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 392 transitions, 4936 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:46,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:46,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:46,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:47,006 INFO L124 PetriNetUnfolderBase]: 2204/3791 cut-off events. [2024-06-04 14:18:47,007 INFO L125 PetriNetUnfolderBase]: For 242139/242139 co-relation queries the response was YES. [2024-06-04 14:18:47,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23911 conditions, 3791 events. 2204/3791 cut-off events. For 242139/242139 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24389 event pairs, 398 based on Foata normal form. 1/3789 useless extension candidates. Maximal degree in co-relation 23767. Up to 3288 conditions per place. [2024-06-04 14:18:47,053 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 353 selfloop transitions, 56 changer transitions 0/416 dead transitions. [2024-06-04 14:18:47,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 416 transitions, 5994 flow [2024-06-04 14:18:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:18:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:18:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-04 14:18:47,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-04 14:18:47,055 INFO L175 Difference]: Start difference. First operand has 307 places, 392 transitions, 4936 flow. Second operand 6 states and 155 transitions. [2024-06-04 14:18:47,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 416 transitions, 5994 flow [2024-06-04 14:18:48,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 416 transitions, 5584 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-04 14:18:48,129 INFO L231 Difference]: Finished difference. Result has 300 places, 393 transitions, 4710 flow [2024-06-04 14:18:48,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4531, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4710, PETRI_PLACES=300, PETRI_TRANSITIONS=393} [2024-06-04 14:18:48,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-04 14:18:48,130 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 393 transitions, 4710 flow [2024-06-04 14:18:48,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:48,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:48,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:48,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 14:18:48,131 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:48,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:48,131 INFO L85 PathProgramCache]: Analyzing trace with hash -346662760, now seen corresponding path program 19 times [2024-06-04 14:18:48,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:48,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707224979] [2024-06-04 14:18:48,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:48,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:48,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:48,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707224979] [2024-06-04 14:18:48,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707224979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:48,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:48,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:18:48,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656658667] [2024-06-04 14:18:48,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:48,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:18:48,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:48,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:18:48,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:18:48,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:48,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 393 transitions, 4710 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:48,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:48,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:48,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:48,882 INFO L124 PetriNetUnfolderBase]: 2201/3787 cut-off events. [2024-06-04 14:18:48,883 INFO L125 PetriNetUnfolderBase]: For 238590/238590 co-relation queries the response was YES. [2024-06-04 14:18:48,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23617 conditions, 3787 events. 2201/3787 cut-off events. For 238590/238590 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24395 event pairs, 398 based on Foata normal form. 1/3785 useless extension candidates. Maximal degree in co-relation 23472. Up to 3285 conditions per place. [2024-06-04 14:18:48,924 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 349 selfloop transitions, 59 changer transitions 0/415 dead transitions. [2024-06-04 14:18:48,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 415 transitions, 5582 flow [2024-06-04 14:18:48,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:18:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:18:48,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-04 14:18:48,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-04 14:18:48,925 INFO L175 Difference]: Start difference. First operand has 300 places, 393 transitions, 4710 flow. Second operand 6 states and 155 transitions. [2024-06-04 14:18:48,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 415 transitions, 5582 flow [2024-06-04 14:18:49,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 415 transitions, 5495 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 14:18:49,960 INFO L231 Difference]: Finished difference. Result has 303 places, 393 transitions, 4755 flow [2024-06-04 14:18:49,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4623, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4755, PETRI_PLACES=303, PETRI_TRANSITIONS=393} [2024-06-04 14:18:49,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-04 14:18:49,960 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 393 transitions, 4755 flow [2024-06-04 14:18:49,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:18:49,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:49,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:49,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 14:18:49,961 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:49,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:49,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1106909654, now seen corresponding path program 1 times [2024-06-04 14:18:49,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:49,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766895655] [2024-06-04 14:18:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:49,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:50,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:50,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766895655] [2024-06-04 14:18:50,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766895655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:50,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:50,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:18:50,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301416513] [2024-06-04 14:18:50,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:50,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:18:50,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:50,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:18:50,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:18:50,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:50,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 393 transitions, 4755 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:50,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:50,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:50,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:50,727 INFO L124 PetriNetUnfolderBase]: 2320/3979 cut-off events. [2024-06-04 14:18:50,727 INFO L125 PetriNetUnfolderBase]: For 324868/324868 co-relation queries the response was YES. [2024-06-04 14:18:50,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26046 conditions, 3979 events. 2320/3979 cut-off events. For 324868/324868 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 25817 event pairs, 447 based on Foata normal form. 12/3983 useless extension candidates. Maximal degree in co-relation 25900. Up to 2982 conditions per place. [2024-06-04 14:18:50,774 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 185 changer transitions 0/427 dead transitions. [2024-06-04 14:18:50,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 427 transitions, 5939 flow [2024-06-04 14:18:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:18:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:18:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 14:18:50,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 14:18:50,775 INFO L175 Difference]: Start difference. First operand has 303 places, 393 transitions, 4755 flow. Second operand 8 states and 196 transitions. [2024-06-04 14:18:50,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 427 transitions, 5939 flow [2024-06-04 14:18:51,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 427 transitions, 5656 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:18:51,727 INFO L231 Difference]: Finished difference. Result has 303 places, 397 transitions, 4947 flow [2024-06-04 14:18:51,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4947, PETRI_PLACES=303, PETRI_TRANSITIONS=397} [2024-06-04 14:18:51,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-04 14:18:51,728 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 397 transitions, 4947 flow [2024-06-04 14:18:51,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:51,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:51,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:51,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 14:18:51,729 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:51,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:51,729 INFO L85 PathProgramCache]: Analyzing trace with hash -250154076, now seen corresponding path program 2 times [2024-06-04 14:18:51,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:51,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759293863] [2024-06-04 14:18:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:51,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:51,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:51,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759293863] [2024-06-04 14:18:51,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759293863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:51,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:51,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:18:51,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929094939] [2024-06-04 14:18:51,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:51,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:18:51,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:51,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:18:51,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:18:51,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:51,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 397 transitions, 4947 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:51,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:51,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:51,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:52,546 INFO L124 PetriNetUnfolderBase]: 2452/4178 cut-off events. [2024-06-04 14:18:52,546 INFO L125 PetriNetUnfolderBase]: For 387078/387078 co-relation queries the response was YES. [2024-06-04 14:18:52,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29149 conditions, 4178 events. 2452/4178 cut-off events. For 387078/387078 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27142 event pairs, 518 based on Foata normal form. 12/4182 useless extension candidates. Maximal degree in co-relation 29002. Up to 3336 conditions per place. [2024-06-04 14:18:52,601 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 243 selfloop transitions, 177 changer transitions 0/427 dead transitions. [2024-06-04 14:18:52,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 427 transitions, 6131 flow [2024-06-04 14:18:52,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:18:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:18:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 14:18:52,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-04 14:18:52,602 INFO L175 Difference]: Start difference. First operand has 303 places, 397 transitions, 4947 flow. Second operand 8 states and 193 transitions. [2024-06-04 14:18:52,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 427 transitions, 6131 flow [2024-06-04 14:18:53,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 427 transitions, 5870 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 14:18:53,789 INFO L231 Difference]: Finished difference. Result has 307 places, 401 transitions, 5153 flow [2024-06-04 14:18:53,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5153, PETRI_PLACES=307, PETRI_TRANSITIONS=401} [2024-06-04 14:18:53,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-04 14:18:53,790 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 401 transitions, 5153 flow [2024-06-04 14:18:53,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:53,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:53,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:53,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 14:18:53,791 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:53,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:53,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1018196024, now seen corresponding path program 3 times [2024-06-04 14:18:53,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:53,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147507757] [2024-06-04 14:18:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:53,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:53,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:53,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147507757] [2024-06-04 14:18:53,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147507757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:53,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:53,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:18:53,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805033119] [2024-06-04 14:18:53,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:53,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:18:53,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:53,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:18:53,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:18:53,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:53,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 401 transitions, 5153 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:53,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:53,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:53,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:54,615 INFO L124 PetriNetUnfolderBase]: 2416/4126 cut-off events. [2024-06-04 14:18:54,616 INFO L125 PetriNetUnfolderBase]: For 356277/356277 co-relation queries the response was YES. [2024-06-04 14:18:54,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27789 conditions, 4126 events. 2416/4126 cut-off events. For 356277/356277 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26871 event pairs, 514 based on Foata normal form. 16/4134 useless extension candidates. Maximal degree in co-relation 27640. Up to 3380 conditions per place. [2024-06-04 14:18:54,667 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 243 selfloop transitions, 173 changer transitions 0/423 dead transitions. [2024-06-04 14:18:54,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 423 transitions, 6053 flow [2024-06-04 14:18:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:18:54,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:18:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 14:18:54,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 14:18:54,668 INFO L175 Difference]: Start difference. First operand has 307 places, 401 transitions, 5153 flow. Second operand 8 states and 189 transitions. [2024-06-04 14:18:54,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 423 transitions, 6053 flow [2024-06-04 14:18:55,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 423 transitions, 5798 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 14:18:55,764 INFO L231 Difference]: Finished difference. Result has 311 places, 401 transitions, 5250 flow [2024-06-04 14:18:55,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4898, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5250, PETRI_PLACES=311, PETRI_TRANSITIONS=401} [2024-06-04 14:18:55,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-04 14:18:55,764 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 401 transitions, 5250 flow [2024-06-04 14:18:55,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:55,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:55,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:55,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 14:18:55,765 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:55,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:55,765 INFO L85 PathProgramCache]: Analyzing trace with hash -971091382, now seen corresponding path program 4 times [2024-06-04 14:18:55,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:55,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755547176] [2024-06-04 14:18:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:55,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:55,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:55,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755547176] [2024-06-04 14:18:55,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755547176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:55,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:55,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:18:55,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750003107] [2024-06-04 14:18:55,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:55,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:18:55,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:55,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:18:55,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:18:55,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:55,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 401 transitions, 5250 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:55,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:55,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:55,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:56,620 INFO L124 PetriNetUnfolderBase]: 2472/4230 cut-off events. [2024-06-04 14:18:56,621 INFO L125 PetriNetUnfolderBase]: For 363555/363555 co-relation queries the response was YES. [2024-06-04 14:18:56,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28589 conditions, 4230 events. 2472/4230 cut-off events. For 363555/363555 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27663 event pairs, 493 based on Foata normal form. 16/4239 useless extension candidates. Maximal degree in co-relation 28438. Up to 3630 conditions per place. [2024-06-04 14:18:56,672 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 337 selfloop transitions, 78 changer transitions 0/422 dead transitions. [2024-06-04 14:18:56,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 422 transitions, 6190 flow [2024-06-04 14:18:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:18:56,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:18:56,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 14:18:56,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-04 14:18:56,673 INFO L175 Difference]: Start difference. First operand has 311 places, 401 transitions, 5250 flow. Second operand 8 states and 185 transitions. [2024-06-04 14:18:56,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 422 transitions, 6190 flow [2024-06-04 14:18:57,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 422 transitions, 5836 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:18:57,848 INFO L231 Difference]: Finished difference. Result has 312 places, 403 transitions, 5112 flow [2024-06-04 14:18:57,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4896, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5112, PETRI_PLACES=312, PETRI_TRANSITIONS=403} [2024-06-04 14:18:57,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-04 14:18:57,849 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 403 transitions, 5112 flow [2024-06-04 14:18:57,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:57,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:18:57,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:18:57,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 14:18:57,849 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:18:57,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:18:57,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1739284920, now seen corresponding path program 5 times [2024-06-04 14:18:57,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:18:57,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137585795] [2024-06-04 14:18:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:18:57,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:18:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:18:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:18:57,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:18:57,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137585795] [2024-06-04 14:18:57,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137585795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:18:57,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:18:57,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:18:57,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893908840] [2024-06-04 14:18:57,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:18:57,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:18:57,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:18:57,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:18:57,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:18:58,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:18:58,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 403 transitions, 5112 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:18:58,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:18:58,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:18:58,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:18:58,761 INFO L124 PetriNetUnfolderBase]: 2604/4434 cut-off events. [2024-06-04 14:18:58,761 INFO L125 PetriNetUnfolderBase]: For 416092/416092 co-relation queries the response was YES. [2024-06-04 14:18:58,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31222 conditions, 4434 events. 2604/4434 cut-off events. For 416092/416092 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29165 event pairs, 513 based on Foata normal form. 12/4439 useless extension candidates. Maximal degree in co-relation 31070. Up to 3674 conditions per place. [2024-06-04 14:18:58,815 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 84 changer transitions 0/430 dead transitions. [2024-06-04 14:18:58,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 430 transitions, 6304 flow [2024-06-04 14:18:58,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:18:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:18:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 14:18:58,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 14:18:58,816 INFO L175 Difference]: Start difference. First operand has 312 places, 403 transitions, 5112 flow. Second operand 8 states and 188 transitions. [2024-06-04 14:18:58,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 430 transitions, 6304 flow [2024-06-04 14:19:00,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 430 transitions, 6124 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 14:19:00,184 INFO L231 Difference]: Finished difference. Result has 314 places, 407 transitions, 5217 flow [2024-06-04 14:19:00,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4932, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5217, PETRI_PLACES=314, PETRI_TRANSITIONS=407} [2024-06-04 14:19:00,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-04 14:19:00,185 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 407 transitions, 5217 flow [2024-06-04 14:19:00,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:00,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:00,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:00,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 14:19:00,185 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:00,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:00,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1733774670, now seen corresponding path program 6 times [2024-06-04 14:19:00,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:00,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321153556] [2024-06-04 14:19:00,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:00,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:00,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:00,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321153556] [2024-06-04 14:19:00,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321153556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:00,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:00,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:00,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126169213] [2024-06-04 14:19:00,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:00,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:00,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:00,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:00,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:00,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:00,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 407 transitions, 5217 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:00,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:00,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:00,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:01,099 INFO L124 PetriNetUnfolderBase]: 2568/4382 cut-off events. [2024-06-04 14:19:01,099 INFO L125 PetriNetUnfolderBase]: For 384402/384402 co-relation queries the response was YES. [2024-06-04 14:19:01,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29604 conditions, 4382 events. 2568/4382 cut-off events. For 384402/384402 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28864 event pairs, 509 based on Foata normal form. 16/4391 useless extension candidates. Maximal degree in co-relation 29451. Up to 3782 conditions per place. [2024-06-04 14:19:01,158 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 79 changer transitions 0/428 dead transitions. [2024-06-04 14:19:01,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 428 transitions, 6123 flow [2024-06-04 14:19:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:19:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:19:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-04 14:19:01,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261904761904762 [2024-06-04 14:19:01,159 INFO L175 Difference]: Start difference. First operand has 314 places, 407 transitions, 5217 flow. Second operand 10 states and 221 transitions. [2024-06-04 14:19:01,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 428 transitions, 6123 flow [2024-06-04 14:19:02,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 428 transitions, 5968 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-04 14:19:02,299 INFO L231 Difference]: Finished difference. Result has 320 places, 407 transitions, 5226 flow [2024-06-04 14:19:02,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5062, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5226, PETRI_PLACES=320, PETRI_TRANSITIONS=407} [2024-06-04 14:19:02,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-04 14:19:02,300 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 407 transitions, 5226 flow [2024-06-04 14:19:02,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:02,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:02,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:02,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 14:19:02,300 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:02,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:02,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1733559468, now seen corresponding path program 1 times [2024-06-04 14:19:02,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:02,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424575133] [2024-06-04 14:19:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:02,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:02,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:02,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424575133] [2024-06-04 14:19:02,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424575133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:02,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:02,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:02,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305926001] [2024-06-04 14:19:02,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:02,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:02,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:02,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:02,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:02,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:02,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 407 transitions, 5226 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:02,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:02,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:02,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:03,253 INFO L124 PetriNetUnfolderBase]: 2608/4454 cut-off events. [2024-06-04 14:19:03,253 INFO L125 PetriNetUnfolderBase]: For 376541/376541 co-relation queries the response was YES. [2024-06-04 14:19:03,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29978 conditions, 4454 events. 2608/4454 cut-off events. For 376541/376541 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29367 event pairs, 511 based on Foata normal form. 12/4459 useless extension candidates. Maximal degree in co-relation 29823. Up to 3722 conditions per place. [2024-06-04 14:19:03,302 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 340 selfloop transitions, 86 changer transitions 0/433 dead transitions. [2024-06-04 14:19:03,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 433 transitions, 6208 flow [2024-06-04 14:19:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:19:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:19:03,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-04 14:19:03,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.530952380952381 [2024-06-04 14:19:03,304 INFO L175 Difference]: Start difference. First operand has 320 places, 407 transitions, 5226 flow. Second operand 10 states and 223 transitions. [2024-06-04 14:19:03,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 433 transitions, 6208 flow [2024-06-04 14:19:04,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 433 transitions, 6034 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-04 14:19:04,537 INFO L231 Difference]: Finished difference. Result has 321 places, 409 transitions, 5285 flow [2024-06-04 14:19:04,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5052, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5285, PETRI_PLACES=321, PETRI_TRANSITIONS=409} [2024-06-04 14:19:04,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-04 14:19:04,537 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 409 transitions, 5285 flow [2024-06-04 14:19:04,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:04,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:04,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:04,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 14:19:04,538 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:04,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:04,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1173250632, now seen corresponding path program 7 times [2024-06-04 14:19:04,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:04,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247381599] [2024-06-04 14:19:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:04,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:04,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:04,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247381599] [2024-06-04 14:19:04,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247381599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:04,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:04,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:04,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108909648] [2024-06-04 14:19:04,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:04,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:04,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:04,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:04,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:04,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:04,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 409 transitions, 5285 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:04,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:04,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:04,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:05,441 INFO L124 PetriNetUnfolderBase]: 2664/4542 cut-off events. [2024-06-04 14:19:05,441 INFO L125 PetriNetUnfolderBase]: For 403003/403003 co-relation queries the response was YES. [2024-06-04 14:19:05,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30814 conditions, 4542 events. 2664/4542 cut-off events. For 403003/403003 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 30064 event pairs, 529 based on Foata normal form. 16/4551 useless extension candidates. Maximal degree in co-relation 30658. Up to 3741 conditions per place. [2024-06-04 14:19:05,499 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 266 selfloop transitions, 163 changer transitions 0/436 dead transitions. [2024-06-04 14:19:05,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 436 transitions, 6277 flow [2024-06-04 14:19:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:19:05,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:19:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 14:19:05,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 14:19:05,501 INFO L175 Difference]: Start difference. First operand has 321 places, 409 transitions, 5285 flow. Second operand 8 states and 192 transitions. [2024-06-04 14:19:05,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 436 transitions, 6277 flow [2024-06-04 14:19:06,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 436 transitions, 6070 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-04 14:19:06,948 INFO L231 Difference]: Finished difference. Result has 321 places, 411 transitions, 5476 flow [2024-06-04 14:19:06,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5078, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5476, PETRI_PLACES=321, PETRI_TRANSITIONS=411} [2024-06-04 14:19:06,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-04 14:19:06,949 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 411 transitions, 5476 flow [2024-06-04 14:19:06,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:06,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:06,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:06,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 14:19:06,949 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:06,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:06,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1178613012, now seen corresponding path program 8 times [2024-06-04 14:19:06,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:06,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409057637] [2024-06-04 14:19:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:06,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:07,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:07,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409057637] [2024-06-04 14:19:07,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409057637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:07,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:07,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:07,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387833618] [2024-06-04 14:19:07,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:07,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:07,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:07,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:07,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:07,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:07,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 411 transitions, 5476 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:07,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:07,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:07,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:08,051 INFO L124 PetriNetUnfolderBase]: 2720/4638 cut-off events. [2024-06-04 14:19:08,051 INFO L125 PetriNetUnfolderBase]: For 414064/414064 co-relation queries the response was YES. [2024-06-04 14:19:08,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31672 conditions, 4638 events. 2720/4638 cut-off events. For 414064/414064 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 30833 event pairs, 541 based on Foata normal form. 16/4647 useless extension candidates. Maximal degree in co-relation 31515. Up to 3829 conditions per place. [2024-06-04 14:19:08,104 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 267 selfloop transitions, 166 changer transitions 0/440 dead transitions. [2024-06-04 14:19:08,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 440 transitions, 6484 flow [2024-06-04 14:19:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:19:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:19:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-04 14:19:08,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 14:19:08,105 INFO L175 Difference]: Start difference. First operand has 321 places, 411 transitions, 5476 flow. Second operand 10 states and 230 transitions. [2024-06-04 14:19:08,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 440 transitions, 6484 flow [2024-06-04 14:19:09,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 440 transitions, 6128 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 14:19:09,379 INFO L231 Difference]: Finished difference. Result has 325 places, 413 transitions, 5528 flow [2024-06-04 14:19:09,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5124, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5528, PETRI_PLACES=325, PETRI_TRANSITIONS=413} [2024-06-04 14:19:09,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-04 14:19:09,380 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 413 transitions, 5528 flow [2024-06-04 14:19:09,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:09,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:09,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:09,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 14:19:09,381 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:09,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:09,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1173102762, now seen corresponding path program 9 times [2024-06-04 14:19:09,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:09,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957952807] [2024-06-04 14:19:09,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:09,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:09,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:09,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957952807] [2024-06-04 14:19:09,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957952807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:09,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:09,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:09,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166952519] [2024-06-04 14:19:09,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:09,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:09,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:09,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:09,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:09,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:09,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 413 transitions, 5528 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:09,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:09,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:09,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:10,328 INFO L124 PetriNetUnfolderBase]: 2760/4707 cut-off events. [2024-06-04 14:19:10,329 INFO L125 PetriNetUnfolderBase]: For 399762/399762 co-relation queries the response was YES. [2024-06-04 14:19:10,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32020 conditions, 4707 events. 2760/4707 cut-off events. For 399762/399762 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 31404 event pairs, 474 based on Foata normal form. 12/4712 useless extension candidates. Maximal degree in co-relation 31862. Up to 3499 conditions per place. [2024-06-04 14:19:10,389 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 179 changer transitions 0/447 dead transitions. [2024-06-04 14:19:10,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 447 transitions, 6740 flow [2024-06-04 14:19:10,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:19:10,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:19:10,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 14:19:10,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-04 14:19:10,390 INFO L175 Difference]: Start difference. First operand has 325 places, 413 transitions, 5528 flow. Second operand 8 states and 199 transitions. [2024-06-04 14:19:10,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 447 transitions, 6740 flow [2024-06-04 14:19:11,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 447 transitions, 6368 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-04 14:19:11,702 INFO L231 Difference]: Finished difference. Result has 323 places, 415 transitions, 5586 flow [2024-06-04 14:19:11,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5158, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5586, PETRI_PLACES=323, PETRI_TRANSITIONS=415} [2024-06-04 14:19:11,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-04 14:19:11,703 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 415 transitions, 5586 flow [2024-06-04 14:19:11,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:11,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:11,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:11,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 14:19:11,703 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:11,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:11,703 INFO L85 PathProgramCache]: Analyzing trace with hash -346385930, now seen corresponding path program 10 times [2024-06-04 14:19:11,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:11,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639290107] [2024-06-04 14:19:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:11,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:11,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:11,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639290107] [2024-06-04 14:19:11,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639290107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:11,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:11,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:11,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374924015] [2024-06-04 14:19:11,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:11,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:11,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:11,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:11,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:11,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:11,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 415 transitions, 5586 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:11,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:11,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:11,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:12,690 INFO L124 PetriNetUnfolderBase]: 2778/4747 cut-off events. [2024-06-04 14:19:12,690 INFO L125 PetriNetUnfolderBase]: For 384540/384540 co-relation queries the response was YES. [2024-06-04 14:19:12,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31541 conditions, 4747 events. 2778/4747 cut-off events. For 384540/384540 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31657 event pairs, 464 based on Foata normal form. 16/4760 useless extension candidates. Maximal degree in co-relation 31384. Up to 4084 conditions per place. [2024-06-04 14:19:12,751 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 374 selfloop transitions, 67 changer transitions 0/448 dead transitions. [2024-06-04 14:19:12,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 448 transitions, 6619 flow [2024-06-04 14:19:12,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:19:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:19:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 14:19:12,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-04 14:19:12,752 INFO L175 Difference]: Start difference. First operand has 323 places, 415 transitions, 5586 flow. Second operand 7 states and 181 transitions. [2024-06-04 14:19:12,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 448 transitions, 6619 flow [2024-06-04 14:19:14,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 448 transitions, 6061 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-04 14:19:14,454 INFO L231 Difference]: Finished difference. Result has 322 places, 418 transitions, 5243 flow [2024-06-04 14:19:14,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5034, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5243, PETRI_PLACES=322, PETRI_TRANSITIONS=418} [2024-06-04 14:19:14,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-04 14:19:14,455 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 418 transitions, 5243 flow [2024-06-04 14:19:14,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:14,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:14,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:14,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 14:19:14,456 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:14,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:14,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1178828214, now seen corresponding path program 2 times [2024-06-04 14:19:14,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:14,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063423910] [2024-06-04 14:19:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:14,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:14,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:14,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063423910] [2024-06-04 14:19:14,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063423910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:14,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:14,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:14,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511630954] [2024-06-04 14:19:14,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:14,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:14,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:14,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:14,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:14,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:14,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 418 transitions, 5243 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:14,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:14,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:14,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:15,425 INFO L124 PetriNetUnfolderBase]: 2818/4804 cut-off events. [2024-06-04 14:19:15,426 INFO L125 PetriNetUnfolderBase]: For 368616/368616 co-relation queries the response was YES. [2024-06-04 14:19:15,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30937 conditions, 4804 events. 2818/4804 cut-off events. For 368616/368616 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32055 event pairs, 535 based on Foata normal form. 12/4809 useless extension candidates. Maximal degree in co-relation 30781. Up to 3739 conditions per place. [2024-06-04 14:19:15,486 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 263 selfloop transitions, 180 changer transitions 0/450 dead transitions. [2024-06-04 14:19:15,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 450 transitions, 6279 flow [2024-06-04 14:19:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:19:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:19:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-04 14:19:15,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-04 14:19:15,487 INFO L175 Difference]: Start difference. First operand has 322 places, 418 transitions, 5243 flow. Second operand 10 states and 232 transitions. [2024-06-04 14:19:15,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 450 transitions, 6279 flow [2024-06-04 14:19:16,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 450 transitions, 6125 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 14:19:16,821 INFO L231 Difference]: Finished difference. Result has 327 places, 420 transitions, 5517 flow [2024-06-04 14:19:16,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5089, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5517, PETRI_PLACES=327, PETRI_TRANSITIONS=420} [2024-06-04 14:19:16,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-04 14:19:16,822 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 420 transitions, 5517 flow [2024-06-04 14:19:16,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:16,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:16,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:16,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 14:19:16,822 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:16,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:16,823 INFO L85 PathProgramCache]: Analyzing trace with hash 2014759392, now seen corresponding path program 3 times [2024-06-04 14:19:16,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:16,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659439333] [2024-06-04 14:19:16,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:16,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:16,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:16,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659439333] [2024-06-04 14:19:16,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659439333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:16,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:16,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:16,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731328555] [2024-06-04 14:19:16,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:16,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:16,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:16,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:16,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:16,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:16,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 420 transitions, 5517 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:16,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:16,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:16,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:17,934 INFO L124 PetriNetUnfolderBase]: 2858/4889 cut-off events. [2024-06-04 14:19:17,935 INFO L125 PetriNetUnfolderBase]: For 376446/376446 co-relation queries the response was YES. [2024-06-04 14:19:17,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31807 conditions, 4889 events. 2858/4889 cut-off events. For 376446/376446 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32809 event pairs, 476 based on Foata normal form. 12/4898 useless extension candidates. Maximal degree in co-relation 31650. Up to 4152 conditions per place. [2024-06-04 14:19:17,988 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 69 changer transitions 0/452 dead transitions. [2024-06-04 14:19:17,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 452 transitions, 6563 flow [2024-06-04 14:19:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:19:17,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:19:17,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 14:19:17,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-04 14:19:17,990 INFO L175 Difference]: Start difference. First operand has 327 places, 420 transitions, 5517 flow. Second operand 7 states and 179 transitions. [2024-06-04 14:19:17,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 452 transitions, 6563 flow [2024-06-04 14:19:19,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 452 transitions, 6161 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-04 14:19:19,715 INFO L231 Difference]: Finished difference. Result has 326 places, 422 transitions, 5322 flow [2024-06-04 14:19:19,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5119, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5322, PETRI_PLACES=326, PETRI_TRANSITIONS=422} [2024-06-04 14:19:19,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-04 14:19:19,715 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 422 transitions, 5322 flow [2024-06-04 14:19:19,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:19,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:19,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:19,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 14:19:19,717 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:19,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:19,717 INFO L85 PathProgramCache]: Analyzing trace with hash -80473448, now seen corresponding path program 4 times [2024-06-04 14:19:19,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:19,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023508325] [2024-06-04 14:19:19,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:19,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:19,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:19,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023508325] [2024-06-04 14:19:19,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023508325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:19,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:19,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:19,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654406444] [2024-06-04 14:19:19,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:19,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:19,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:19,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:19,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:19,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:19,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 422 transitions, 5322 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:19,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:19,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:19,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:20,716 INFO L124 PetriNetUnfolderBase]: 2924/5001 cut-off events. [2024-06-04 14:19:20,716 INFO L125 PetriNetUnfolderBase]: For 393029/393029 co-relation queries the response was YES. [2024-06-04 14:19:20,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32503 conditions, 5001 events. 2924/5001 cut-off events. For 393029/393029 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 33742 event pairs, 457 based on Foata normal form. 12/5010 useless extension candidates. Maximal degree in co-relation 32345. Up to 3972 conditions per place. [2024-06-04 14:19:20,782 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 72 changer transitions 0/454 dead transitions. [2024-06-04 14:19:20,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 454 transitions, 6564 flow [2024-06-04 14:19:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:19:20,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:19:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 14:19:20,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 14:19:20,783 INFO L175 Difference]: Start difference. First operand has 326 places, 422 transitions, 5322 flow. Second operand 7 states and 176 transitions. [2024-06-04 14:19:20,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 454 transitions, 6564 flow [2024-06-04 14:19:22,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 454 transitions, 6387 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 14:19:22,275 INFO L231 Difference]: Finished difference. Result has 329 places, 425 transitions, 5419 flow [2024-06-04 14:19:22,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5145, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5419, PETRI_PLACES=329, PETRI_TRANSITIONS=425} [2024-06-04 14:19:22,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-04 14:19:22,276 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 425 transitions, 5419 flow [2024-06-04 14:19:22,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:22,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:22,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:22,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 14:19:22,277 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:22,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:22,277 INFO L85 PathProgramCache]: Analyzing trace with hash -452559100, now seen corresponding path program 1 times [2024-06-04 14:19:22,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:22,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761313015] [2024-06-04 14:19:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:22,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:22,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:22,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761313015] [2024-06-04 14:19:22,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761313015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:22,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:22,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:22,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746893995] [2024-06-04 14:19:22,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:22,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:22,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:22,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:22,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:22,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:22,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 425 transitions, 5419 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:22,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:22,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:22,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:23,380 INFO L124 PetriNetUnfolderBase]: 2945/5027 cut-off events. [2024-06-04 14:19:23,380 INFO L125 PetriNetUnfolderBase]: For 368477/368483 co-relation queries the response was YES. [2024-06-04 14:19:23,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33021 conditions, 5027 events. 2945/5027 cut-off events. For 368477/368483 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33922 event pairs, 601 based on Foata normal form. 1/5021 useless extension candidates. Maximal degree in co-relation 32861. Up to 4244 conditions per place. [2024-06-04 14:19:23,439 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 358 selfloop transitions, 105 changer transitions 0/470 dead transitions. [2024-06-04 14:19:23,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 470 transitions, 7093 flow [2024-06-04 14:19:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:19:23,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:19:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 14:19:23,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-04 14:19:23,441 INFO L175 Difference]: Start difference. First operand has 329 places, 425 transitions, 5419 flow. Second operand 8 states and 201 transitions. [2024-06-04 14:19:23,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 470 transitions, 7093 flow [2024-06-04 14:19:25,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 470 transitions, 6967 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 14:19:25,083 INFO L231 Difference]: Finished difference. Result has 333 places, 437 transitions, 5659 flow [2024-06-04 14:19:25,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5293, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5659, PETRI_PLACES=333, PETRI_TRANSITIONS=437} [2024-06-04 14:19:25,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-04 14:19:25,085 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 437 transitions, 5659 flow [2024-06-04 14:19:25,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:25,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:25,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:25,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 14:19:25,085 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:25,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:25,086 INFO L85 PathProgramCache]: Analyzing trace with hash -452438944, now seen corresponding path program 1 times [2024-06-04 14:19:25,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:25,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983682752] [2024-06-04 14:19:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:25,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:25,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:25,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983682752] [2024-06-04 14:19:25,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983682752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:25,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:25,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:25,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802640273] [2024-06-04 14:19:25,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:25,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:25,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:25,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:25,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:25,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:25,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 437 transitions, 5659 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:25,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:25,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:25,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:26,130 INFO L124 PetriNetUnfolderBase]: 2971/5067 cut-off events. [2024-06-04 14:19:26,131 INFO L125 PetriNetUnfolderBase]: For 383135/383141 co-relation queries the response was YES. [2024-06-04 14:19:26,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33900 conditions, 5067 events. 2971/5067 cut-off events. For 383135/383141 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34142 event pairs, 587 based on Foata normal form. 5/5067 useless extension candidates. Maximal degree in co-relation 33739. Up to 4333 conditions per place. [2024-06-04 14:19:26,201 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 352 selfloop transitions, 120 changer transitions 0/479 dead transitions. [2024-06-04 14:19:26,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 479 transitions, 7364 flow [2024-06-04 14:19:26,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:19:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:19:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 14:19:26,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-04 14:19:26,203 INFO L175 Difference]: Start difference. First operand has 333 places, 437 transitions, 5659 flow. Second operand 8 states and 198 transitions. [2024-06-04 14:19:26,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 479 transitions, 7364 flow [2024-06-04 14:19:28,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 479 transitions, 7229 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-04 14:19:28,103 INFO L231 Difference]: Finished difference. Result has 340 places, 449 transitions, 5941 flow [2024-06-04 14:19:28,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5533, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5941, PETRI_PLACES=340, PETRI_TRANSITIONS=449} [2024-06-04 14:19:28,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-04 14:19:28,104 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 449 transitions, 5941 flow [2024-06-04 14:19:28,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:28,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:28,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:28,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 14:19:28,105 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:28,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:28,107 INFO L85 PathProgramCache]: Analyzing trace with hash -452439130, now seen corresponding path program 2 times [2024-06-04 14:19:28,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:28,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991120511] [2024-06-04 14:19:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:28,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:28,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:28,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991120511] [2024-06-04 14:19:28,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991120511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:28,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:28,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:28,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173717700] [2024-06-04 14:19:28,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:28,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:28,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:28,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:28,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 449 transitions, 5941 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:28,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:28,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:28,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:29,235 INFO L124 PetriNetUnfolderBase]: 2976/5076 cut-off events. [2024-06-04 14:19:29,236 INFO L125 PetriNetUnfolderBase]: For 384147/384153 co-relation queries the response was YES. [2024-06-04 14:19:29,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34198 conditions, 5076 events. 2976/5076 cut-off events. For 384147/384153 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34269 event pairs, 576 based on Foata normal form. 5/5076 useless extension candidates. Maximal degree in co-relation 34033. Up to 4471 conditions per place. [2024-06-04 14:19:29,300 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 412 selfloop transitions, 60 changer transitions 0/479 dead transitions. [2024-06-04 14:19:29,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 479 transitions, 6973 flow [2024-06-04 14:19:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:19:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:19:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 14:19:29,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 14:19:29,301 INFO L175 Difference]: Start difference. First operand has 340 places, 449 transitions, 5941 flow. Second operand 8 states and 191 transitions. [2024-06-04 14:19:29,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 479 transitions, 6973 flow [2024-06-04 14:19:31,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 479 transitions, 6687 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 14:19:31,223 INFO L231 Difference]: Finished difference. Result has 344 places, 452 transitions, 5807 flow [2024-06-04 14:19:31,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5655, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5807, PETRI_PLACES=344, PETRI_TRANSITIONS=452} [2024-06-04 14:19:31,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-04 14:19:31,223 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 452 transitions, 5807 flow [2024-06-04 14:19:31,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:31,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:31,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:31,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 14:19:31,224 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:31,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:31,224 INFO L85 PathProgramCache]: Analyzing trace with hash -275070274, now seen corresponding path program 2 times [2024-06-04 14:19:31,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:31,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736252598] [2024-06-04 14:19:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:31,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:31,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:31,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736252598] [2024-06-04 14:19:31,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736252598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:31,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:31,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:31,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819105675] [2024-06-04 14:19:31,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:31,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:31,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:31,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:31,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:31,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 452 transitions, 5807 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:31,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:31,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:31,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:32,313 INFO L124 PetriNetUnfolderBase]: 2981/5086 cut-off events. [2024-06-04 14:19:32,314 INFO L125 PetriNetUnfolderBase]: For 391907/391913 co-relation queries the response was YES. [2024-06-04 14:19:32,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34123 conditions, 5086 events. 2981/5086 cut-off events. For 391907/391913 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34378 event pairs, 596 based on Foata normal form. 5/5085 useless extension candidates. Maximal degree in co-relation 33957. Up to 4346 conditions per place. [2024-06-04 14:19:32,387 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 351 selfloop transitions, 123 changer transitions 0/481 dead transitions. [2024-06-04 14:19:32,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 481 transitions, 7207 flow [2024-06-04 14:19:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:19:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:19:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 14:19:32,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-04 14:19:32,388 INFO L175 Difference]: Start difference. First operand has 344 places, 452 transitions, 5807 flow. Second operand 8 states and 194 transitions. [2024-06-04 14:19:32,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 481 transitions, 7207 flow [2024-06-04 14:19:34,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 481 transitions, 7075 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 14:19:34,266 INFO L231 Difference]: Finished difference. Result has 345 places, 455 transitions, 5959 flow [2024-06-04 14:19:34,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5675, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5959, PETRI_PLACES=345, PETRI_TRANSITIONS=455} [2024-06-04 14:19:34,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-04 14:19:34,270 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 455 transitions, 5959 flow [2024-06-04 14:19:34,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:34,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:34,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:34,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 14:19:34,271 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:34,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:34,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1286237584, now seen corresponding path program 3 times [2024-06-04 14:19:34,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:34,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308654278] [2024-06-04 14:19:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:34,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:34,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:34,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308654278] [2024-06-04 14:19:34,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308654278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:34,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:34,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:34,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694966447] [2024-06-04 14:19:34,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:34,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:34,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:34,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:34,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:34,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:34,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 455 transitions, 5959 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:34,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:34,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:34,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:35,398 INFO L124 PetriNetUnfolderBase]: 2991/5101 cut-off events. [2024-06-04 14:19:35,399 INFO L125 PetriNetUnfolderBase]: For 400172/400178 co-relation queries the response was YES. [2024-06-04 14:19:35,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34486 conditions, 5101 events. 2991/5101 cut-off events. For 400172/400178 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34506 event pairs, 587 based on Foata normal form. 5/5101 useless extension candidates. Maximal degree in co-relation 34320. Up to 4356 conditions per place. [2024-06-04 14:19:35,468 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 357 selfloop transitions, 129 changer transitions 0/493 dead transitions. [2024-06-04 14:19:35,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 493 transitions, 7627 flow [2024-06-04 14:19:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:19:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:19:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-04 14:19:35,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-04 14:19:35,470 INFO L175 Difference]: Start difference. First operand has 345 places, 455 transitions, 5959 flow. Second operand 10 states and 238 transitions. [2024-06-04 14:19:35,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 493 transitions, 7627 flow [2024-06-04 14:19:37,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 493 transitions, 7467 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:19:37,157 INFO L231 Difference]: Finished difference. Result has 352 places, 461 transitions, 6151 flow [2024-06-04 14:19:37,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5804, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6151, PETRI_PLACES=352, PETRI_TRANSITIONS=461} [2024-06-04 14:19:37,158 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-04 14:19:37,158 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 461 transitions, 6151 flow [2024-06-04 14:19:37,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:37,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:37,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:37,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 14:19:37,160 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:37,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:37,160 INFO L85 PathProgramCache]: Analyzing trace with hash 14051728, now seen corresponding path program 3 times [2024-06-04 14:19:37,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:37,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802422183] [2024-06-04 14:19:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:37,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:37,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:37,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802422183] [2024-06-04 14:19:37,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802422183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:37,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:37,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:19:37,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830258938] [2024-06-04 14:19:37,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:37,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:19:37,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:37,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:19:37,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:19:37,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:37,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 461 transitions, 6151 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:37,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:37,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:37,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:38,222 INFO L124 PetriNetUnfolderBase]: 3004/5121 cut-off events. [2024-06-04 14:19:38,222 INFO L125 PetriNetUnfolderBase]: For 413672/413678 co-relation queries the response was YES. [2024-06-04 14:19:38,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34837 conditions, 5121 events. 3004/5121 cut-off events. For 413672/413678 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 34609 event pairs, 576 based on Foata normal form. 5/5121 useless extension candidates. Maximal degree in co-relation 34668. Up to 4502 conditions per place. [2024-06-04 14:19:38,293 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 421 selfloop transitions, 70 changer transitions 0/498 dead transitions. [2024-06-04 14:19:38,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 498 transitions, 7445 flow [2024-06-04 14:19:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:19:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:19:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-04 14:19:38,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-04 14:19:38,294 INFO L175 Difference]: Start difference. First operand has 352 places, 461 transitions, 6151 flow. Second operand 11 states and 247 transitions. [2024-06-04 14:19:38,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 498 transitions, 7445 flow [2024-06-04 14:19:39,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 498 transitions, 7095 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-04 14:19:39,879 INFO L231 Difference]: Finished difference. Result has 356 places, 467 transitions, 6021 flow [2024-06-04 14:19:39,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5801, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6021, PETRI_PLACES=356, PETRI_TRANSITIONS=467} [2024-06-04 14:19:39,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-04 14:19:39,879 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 467 transitions, 6021 flow [2024-06-04 14:19:39,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:19:39,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:39,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:39,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 14:19:39,880 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:39,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:39,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1170589538, now seen corresponding path program 4 times [2024-06-04 14:19:39,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:39,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231599191] [2024-06-04 14:19:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:39,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:39,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:39,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231599191] [2024-06-04 14:19:39,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231599191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:39,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:39,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:39,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124200972] [2024-06-04 14:19:39,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:39,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:39,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:39,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:40,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:40,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 467 transitions, 6021 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:19:40,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:40,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:40,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:40,920 INFO L124 PetriNetUnfolderBase]: 3017/5113 cut-off events. [2024-06-04 14:19:40,920 INFO L125 PetriNetUnfolderBase]: For 426302/426302 co-relation queries the response was YES. [2024-06-04 14:19:40,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34932 conditions, 5113 events. 3017/5113 cut-off events. For 426302/426302 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 34447 event pairs, 621 based on Foata normal form. 1/5099 useless extension candidates. Maximal degree in co-relation 34762. Up to 4331 conditions per place. [2024-06-04 14:19:41,000 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 366 selfloop transitions, 123 changer transitions 0/496 dead transitions. [2024-06-04 14:19:41,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 496 transitions, 7687 flow [2024-06-04 14:19:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:19:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:19:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:19:41,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 14:19:41,001 INFO L175 Difference]: Start difference. First operand has 356 places, 467 transitions, 6021 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:19:41,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 496 transitions, 7687 flow [2024-06-04 14:19:42,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 496 transitions, 7463 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-04 14:19:42,924 INFO L231 Difference]: Finished difference. Result has 352 places, 473 transitions, 6129 flow [2024-06-04 14:19:42,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5797, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6129, PETRI_PLACES=352, PETRI_TRANSITIONS=473} [2024-06-04 14:19:42,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-04 14:19:42,925 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 473 transitions, 6129 flow [2024-06-04 14:19:42,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:19:42,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:42,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:42,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 14:19:42,926 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:42,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:42,926 INFO L85 PathProgramCache]: Analyzing trace with hash 634300144, now seen corresponding path program 5 times [2024-06-04 14:19:42,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:42,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029496241] [2024-06-04 14:19:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:42,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:43,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:43,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029496241] [2024-06-04 14:19:43,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029496241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:43,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:43,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:43,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571772309] [2024-06-04 14:19:43,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:43,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:43,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:43,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:43,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:43,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:43,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 473 transitions, 6129 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:19:43,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:43,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:43,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:43,953 INFO L124 PetriNetUnfolderBase]: 3030/5135 cut-off events. [2024-06-04 14:19:43,953 INFO L125 PetriNetUnfolderBase]: For 438743/438743 co-relation queries the response was YES. [2024-06-04 14:19:44,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35322 conditions, 5135 events. 3030/5135 cut-off events. For 438743/438743 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34669 event pairs, 621 based on Foata normal form. 1/5121 useless extension candidates. Maximal degree in co-relation 35153. Up to 4346 conditions per place. [2024-06-04 14:19:44,029 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 364 selfloop transitions, 128 changer transitions 0/499 dead transitions. [2024-06-04 14:19:44,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 499 transitions, 7811 flow [2024-06-04 14:19:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:19:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:19:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 14:19:44,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 14:19:44,031 INFO L175 Difference]: Start difference. First operand has 352 places, 473 transitions, 6129 flow. Second operand 7 states and 171 transitions. [2024-06-04 14:19:44,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 499 transitions, 7811 flow [2024-06-04 14:19:45,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 499 transitions, 7533 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-04 14:19:45,791 INFO L231 Difference]: Finished difference. Result has 356 places, 479 transitions, 6205 flow [2024-06-04 14:19:45,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5887, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6205, PETRI_PLACES=356, PETRI_TRANSITIONS=479} [2024-06-04 14:19:45,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-04 14:19:45,792 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 479 transitions, 6205 flow [2024-06-04 14:19:45,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:19:45,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:45,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:45,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 14:19:45,793 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:45,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:45,793 INFO L85 PathProgramCache]: Analyzing trace with hash -985730804, now seen corresponding path program 6 times [2024-06-04 14:19:45,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:45,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598251313] [2024-06-04 14:19:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:45,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:45,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:45,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598251313] [2024-06-04 14:19:45,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598251313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:45,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:45,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:45,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503419600] [2024-06-04 14:19:45,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:45,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:45,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:45,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:45,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:45,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:45,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 479 transitions, 6205 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:19:45,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:45,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:45,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:46,789 INFO L124 PetriNetUnfolderBase]: 3027/5131 cut-off events. [2024-06-04 14:19:46,790 INFO L125 PetriNetUnfolderBase]: For 443068/443068 co-relation queries the response was YES. [2024-06-04 14:19:46,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35246 conditions, 5131 events. 3027/5131 cut-off events. For 443068/443068 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34642 event pairs, 621 based on Foata normal form. 1/5117 useless extension candidates. Maximal degree in co-relation 35076. Up to 4343 conditions per place. [2024-06-04 14:19:46,860 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 371 selfloop transitions, 125 changer transitions 0/503 dead transitions. [2024-06-04 14:19:46,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 503 transitions, 8007 flow [2024-06-04 14:19:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:19:46,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:19:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-04 14:19:46,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-04 14:19:46,861 INFO L175 Difference]: Start difference. First operand has 356 places, 479 transitions, 6205 flow. Second operand 7 states and 174 transitions. [2024-06-04 14:19:46,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 503 transitions, 8007 flow [2024-06-04 14:19:48,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 503 transitions, 7799 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 14:19:48,856 INFO L231 Difference]: Finished difference. Result has 360 places, 479 transitions, 6253 flow [2024-06-04 14:19:48,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5997, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6253, PETRI_PLACES=360, PETRI_TRANSITIONS=479} [2024-06-04 14:19:48,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-04 14:19:48,857 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 479 transitions, 6253 flow [2024-06-04 14:19:48,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:19:48,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:48,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:48,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 14:19:48,857 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:48,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:48,858 INFO L85 PathProgramCache]: Analyzing trace with hash -985610834, now seen corresponding path program 7 times [2024-06-04 14:19:48,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:48,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321968971] [2024-06-04 14:19:48,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:48,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:48,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:48,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321968971] [2024-06-04 14:19:48,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321968971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:48,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:48,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:48,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653983912] [2024-06-04 14:19:48,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:48,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:48,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:48,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:48,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:48,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 479 transitions, 6253 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:19:48,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:48,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:48,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:49,871 INFO L124 PetriNetUnfolderBase]: 3037/5157 cut-off events. [2024-06-04 14:19:49,872 INFO L125 PetriNetUnfolderBase]: For 452075/452075 co-relation queries the response was YES. [2024-06-04 14:19:49,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35477 conditions, 5157 events. 3037/5157 cut-off events. For 452075/452075 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 34890 event pairs, 591 based on Foata normal form. 1/5146 useless extension candidates. Maximal degree in co-relation 35306. Up to 4554 conditions per place. [2024-06-04 14:19:49,944 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 429 selfloop transitions, 66 changer transitions 0/502 dead transitions. [2024-06-04 14:19:49,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 502 transitions, 7373 flow [2024-06-04 14:19:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:19:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:19:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 14:19:49,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-04 14:19:49,946 INFO L175 Difference]: Start difference. First operand has 360 places, 479 transitions, 6253 flow. Second operand 7 states and 163 transitions. [2024-06-04 14:19:49,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 502 transitions, 7373 flow [2024-06-04 14:19:52,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 502 transitions, 6975 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-04 14:19:52,220 INFO L231 Difference]: Finished difference. Result has 360 places, 485 transitions, 6087 flow [2024-06-04 14:19:52,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5882, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6087, PETRI_PLACES=360, PETRI_TRANSITIONS=485} [2024-06-04 14:19:52,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-04 14:19:52,221 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 485 transitions, 6087 flow [2024-06-04 14:19:52,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:19:52,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:52,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:52,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 14:19:52,221 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:52,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:52,222 INFO L85 PathProgramCache]: Analyzing trace with hash -985610648, now seen corresponding path program 4 times [2024-06-04 14:19:52,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:52,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517683841] [2024-06-04 14:19:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:52,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:52,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:52,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517683841] [2024-06-04 14:19:52,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517683841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:52,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:52,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:52,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272033259] [2024-06-04 14:19:52,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:52,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:52,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:52,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:52,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:52,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:52,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 485 transitions, 6087 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:19:52,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:52,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:52,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:53,207 INFO L124 PetriNetUnfolderBase]: 3042/5164 cut-off events. [2024-06-04 14:19:53,208 INFO L125 PetriNetUnfolderBase]: For 459031/459031 co-relation queries the response was YES. [2024-06-04 14:19:53,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35358 conditions, 5164 events. 3042/5164 cut-off events. For 459031/459031 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 34887 event pairs, 613 based on Foata normal form. 1/5153 useless extension candidates. Maximal degree in co-relation 35187. Up to 4423 conditions per place. [2024-06-04 14:19:53,280 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 368 selfloop transitions, 133 changer transitions 0/508 dead transitions. [2024-06-04 14:19:53,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 508 transitions, 7753 flow [2024-06-04 14:19:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:19:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:19:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 14:19:53,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-04 14:19:53,281 INFO L175 Difference]: Start difference. First operand has 360 places, 485 transitions, 6087 flow. Second operand 7 states and 169 transitions. [2024-06-04 14:19:53,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 508 transitions, 7753 flow [2024-06-04 14:19:55,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 508 transitions, 7615 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:19:55,501 INFO L231 Difference]: Finished difference. Result has 363 places, 488 transitions, 6261 flow [2024-06-04 14:19:55,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5949, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6261, PETRI_PLACES=363, PETRI_TRANSITIONS=488} [2024-06-04 14:19:55,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-04 14:19:55,519 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 488 transitions, 6261 flow [2024-06-04 14:19:55,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:19:55,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:55,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:55,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 14:19:55,519 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:55,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:55,520 INFO L85 PathProgramCache]: Analyzing trace with hash -660662324, now seen corresponding path program 8 times [2024-06-04 14:19:55,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:55,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76487107] [2024-06-04 14:19:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:55,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:55,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:55,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76487107] [2024-06-04 14:19:55,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76487107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:55,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:55,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:55,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320285440] [2024-06-04 14:19:55,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:55,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:55,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:55,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:55,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:55,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 488 transitions, 6261 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:19:55,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:55,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:55,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:56,556 INFO L124 PetriNetUnfolderBase]: 3060/5197 cut-off events. [2024-06-04 14:19:56,557 INFO L125 PetriNetUnfolderBase]: For 472930/472930 co-relation queries the response was YES. [2024-06-04 14:19:56,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35870 conditions, 5197 events. 3060/5197 cut-off events. For 472930/472930 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 35225 event pairs, 591 based on Foata normal form. 1/5186 useless extension candidates. Maximal degree in co-relation 35698. Up to 4569 conditions per place. [2024-06-04 14:19:56,629 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 425 selfloop transitions, 80 changer transitions 0/512 dead transitions. [2024-06-04 14:19:56,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 512 transitions, 7595 flow [2024-06-04 14:19:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:19:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:19:56,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 14:19:56,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-04 14:19:56,630 INFO L175 Difference]: Start difference. First operand has 363 places, 488 transitions, 6261 flow. Second operand 7 states and 164 transitions. [2024-06-04 14:19:56,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 512 transitions, 7595 flow [2024-06-04 14:19:58,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 512 transitions, 7259 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 14:19:58,951 INFO L231 Difference]: Finished difference. Result has 366 places, 497 transitions, 6214 flow [2024-06-04 14:19:58,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5929, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6214, PETRI_PLACES=366, PETRI_TRANSITIONS=497} [2024-06-04 14:19:58,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-04 14:19:58,952 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 497 transitions, 6214 flow [2024-06-04 14:19:58,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:19:58,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:19:58,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:19:58,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 14:19:58,953 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:19:58,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:19:58,953 INFO L85 PathProgramCache]: Analyzing trace with hash -660483578, now seen corresponding path program 5 times [2024-06-04 14:19:58,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:19:58,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378317258] [2024-06-04 14:19:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:19:58,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:19:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:19:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:19:59,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:19:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378317258] [2024-06-04 14:19:59,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378317258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:19:59,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:19:59,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:19:59,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355181857] [2024-06-04 14:19:59,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:19:59,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:19:59,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:19:59,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:19:59,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:19:59,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:19:59,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 497 transitions, 6214 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:19:59,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:19:59,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:19:59,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:19:59,985 INFO L124 PetriNetUnfolderBase]: 3073/5217 cut-off events. [2024-06-04 14:19:59,985 INFO L125 PetriNetUnfolderBase]: For 485995/485995 co-relation queries the response was YES. [2024-06-04 14:20:00,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36030 conditions, 5217 events. 3073/5217 cut-off events. For 485995/485995 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35362 event pairs, 613 based on Foata normal form. 1/5206 useless extension candidates. Maximal degree in co-relation 35857. Up to 4460 conditions per place. [2024-06-04 14:20:00,061 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 138 changer transitions 0/520 dead transitions. [2024-06-04 14:20:00,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 520 transitions, 7932 flow [2024-06-04 14:20:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:20:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:20:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 14:20:00,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 14:20:00,063 INFO L175 Difference]: Start difference. First operand has 366 places, 497 transitions, 6214 flow. Second operand 7 states and 168 transitions. [2024-06-04 14:20:00,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 520 transitions, 7932 flow [2024-06-04 14:20:02,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 520 transitions, 7824 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-04 14:20:02,489 INFO L231 Difference]: Finished difference. Result has 371 places, 503 transitions, 6452 flow [2024-06-04 14:20:02,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6106, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6452, PETRI_PLACES=371, PETRI_TRANSITIONS=503} [2024-06-04 14:20:02,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-04 14:20:02,490 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 503 transitions, 6452 flow [2024-06-04 14:20:02,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:20:02,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:02,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:02,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 14:20:02,490 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:02,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:02,491 INFO L85 PathProgramCache]: Analyzing trace with hash -660869714, now seen corresponding path program 9 times [2024-06-04 14:20:02,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:02,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361396994] [2024-06-04 14:20:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:02,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:02,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:02,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361396994] [2024-06-04 14:20:02,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361396994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:02,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:02,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:20:02,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360859583] [2024-06-04 14:20:02,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:02,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:20:02,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:02,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:20:02,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:20:02,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:02,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 503 transitions, 6452 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:20:02,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:02,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:02,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:03,637 INFO L124 PetriNetUnfolderBase]: 3070/5215 cut-off events. [2024-06-04 14:20:03,637 INFO L125 PetriNetUnfolderBase]: For 490880/490880 co-relation queries the response was YES. [2024-06-04 14:20:03,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36200 conditions, 5215 events. 3070/5215 cut-off events. For 490880/490880 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35334 event pairs, 591 based on Foata normal form. 1/5204 useless extension candidates. Maximal degree in co-relation 36026. Up to 4584 conditions per place. [2024-06-04 14:20:03,708 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 431 selfloop transitions, 81 changer transitions 0/519 dead transitions. [2024-06-04 14:20:03,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 519 transitions, 7514 flow [2024-06-04 14:20:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:20:03,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:20:03,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 14:20:03,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-04 14:20:03,710 INFO L175 Difference]: Start difference. First operand has 371 places, 503 transitions, 6452 flow. Second operand 9 states and 199 transitions. [2024-06-04 14:20:03,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 519 transitions, 7514 flow [2024-06-04 14:20:06,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 519 transitions, 7286 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 14:20:06,150 INFO L231 Difference]: Finished difference. Result has 377 places, 503 transitions, 6392 flow [2024-06-04 14:20:06,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6224, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6392, PETRI_PLACES=377, PETRI_TRANSITIONS=503} [2024-06-04 14:20:06,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-04 14:20:06,151 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 503 transitions, 6392 flow [2024-06-04 14:20:06,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:20:06,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:06,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:06,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 14:20:06,151 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:06,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:06,152 INFO L85 PathProgramCache]: Analyzing trace with hash 433897420, now seen corresponding path program 6 times [2024-06-04 14:20:06,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:06,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714645424] [2024-06-04 14:20:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:06,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:06,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:06,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714645424] [2024-06-04 14:20:06,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714645424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:06,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:06,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:20:06,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282186831] [2024-06-04 14:20:06,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:06,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:20:06,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:06,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:20:06,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:20:06,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:06,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 503 transitions, 6392 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:20:06,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:06,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:06,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:07,179 INFO L124 PetriNetUnfolderBase]: 3067/5209 cut-off events. [2024-06-04 14:20:07,179 INFO L125 PetriNetUnfolderBase]: For 495016/495016 co-relation queries the response was YES. [2024-06-04 14:20:07,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36039 conditions, 5209 events. 3067/5209 cut-off events. For 495016/495016 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35285 event pairs, 613 based on Foata normal form. 1/5198 useless extension candidates. Maximal degree in co-relation 35864. Up to 4453 conditions per place. [2024-06-04 14:20:07,255 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 136 changer transitions 0/519 dead transitions. [2024-06-04 14:20:07,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 519 transitions, 7854 flow [2024-06-04 14:20:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:20:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:20:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 14:20:07,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-04 14:20:07,256 INFO L175 Difference]: Start difference. First operand has 377 places, 503 transitions, 6392 flow. Second operand 7 states and 167 transitions. [2024-06-04 14:20:07,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 519 transitions, 7854 flow [2024-06-04 14:20:09,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 519 transitions, 7656 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 14:20:09,235 INFO L231 Difference]: Finished difference. Result has 376 places, 503 transitions, 6472 flow [2024-06-04 14:20:09,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6472, PETRI_PLACES=376, PETRI_TRANSITIONS=503} [2024-06-04 14:20:09,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-04 14:20:09,235 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 503 transitions, 6472 flow [2024-06-04 14:20:09,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:20:09,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:09,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:09,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 14:20:09,236 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:09,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:09,236 INFO L85 PathProgramCache]: Analyzing trace with hash -61539774, now seen corresponding path program 7 times [2024-06-04 14:20:09,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:09,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929712143] [2024-06-04 14:20:09,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:09,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:09,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:09,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929712143] [2024-06-04 14:20:09,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929712143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:09,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:09,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:20:09,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568217063] [2024-06-04 14:20:09,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:09,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:20:09,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:20:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:20:09,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:09,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 503 transitions, 6472 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:09,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:09,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:09,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:10,324 INFO L124 PetriNetUnfolderBase]: 3080/5254 cut-off events. [2024-06-04 14:20:10,324 INFO L125 PetriNetUnfolderBase]: For 510222/510228 co-relation queries the response was YES. [2024-06-04 14:20:10,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36504 conditions, 5254 events. 3080/5254 cut-off events. For 510222/510228 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 35787 event pairs, 602 based on Foata normal form. 5/5253 useless extension candidates. Maximal degree in co-relation 36328. Up to 4468 conditions per place. [2024-06-04 14:20:10,398 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 142 changer transitions 0/530 dead transitions. [2024-06-04 14:20:10,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 530 transitions, 8256 flow [2024-06-04 14:20:10,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:20:10,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:20:10,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 14:20:10,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-04 14:20:10,399 INFO L175 Difference]: Start difference. First operand has 376 places, 503 transitions, 6472 flow. Second operand 8 states and 190 transitions. [2024-06-04 14:20:10,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 530 transitions, 8256 flow [2024-06-04 14:20:12,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 530 transitions, 7959 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 14:20:12,592 INFO L231 Difference]: Finished difference. Result has 378 places, 509 transitions, 6547 flow [2024-06-04 14:20:12,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6187, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6547, PETRI_PLACES=378, PETRI_TRANSITIONS=509} [2024-06-04 14:20:12,593 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-04 14:20:12,593 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 509 transitions, 6547 flow [2024-06-04 14:20:12,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:12,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:12,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:12,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 14:20:12,594 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:12,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:12,594 INFO L85 PathProgramCache]: Analyzing trace with hash 662415146, now seen corresponding path program 10 times [2024-06-04 14:20:12,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:12,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135823631] [2024-06-04 14:20:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:12,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:12,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:12,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135823631] [2024-06-04 14:20:12,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135823631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:12,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:12,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:20:12,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561435379] [2024-06-04 14:20:12,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:12,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:20:12,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:12,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:20:12,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:20:12,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:12,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 509 transitions, 6547 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:20:12,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:12,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:12,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:13,630 INFO L124 PetriNetUnfolderBase]: 3085/5242 cut-off events. [2024-06-04 14:20:13,630 INFO L125 PetriNetUnfolderBase]: For 519383/519383 co-relation queries the response was YES. [2024-06-04 14:20:13,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36633 conditions, 5242 events. 3085/5242 cut-off events. For 519383/519383 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 35632 event pairs, 591 based on Foata normal form. 1/5231 useless extension candidates. Maximal degree in co-relation 36456. Up to 4455 conditions per place. [2024-06-04 14:20:13,708 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 392 selfloop transitions, 138 changer transitions 0/537 dead transitions. [2024-06-04 14:20:13,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 537 transitions, 8111 flow [2024-06-04 14:20:13,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:20:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:20:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 14:20:13,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 14:20:13,709 INFO L175 Difference]: Start difference. First operand has 378 places, 509 transitions, 6547 flow. Second operand 7 states and 176 transitions. [2024-06-04 14:20:13,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 537 transitions, 8111 flow [2024-06-04 14:20:16,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 537 transitions, 7884 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 14:20:16,291 INFO L231 Difference]: Finished difference. Result has 382 places, 512 transitions, 6691 flow [2024-06-04 14:20:16,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6691, PETRI_PLACES=382, PETRI_TRANSITIONS=512} [2024-06-04 14:20:16,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-04 14:20:16,292 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 512 transitions, 6691 flow [2024-06-04 14:20:16,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:20:16,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:16,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:16,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 14:20:16,292 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:16,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:16,293 INFO L85 PathProgramCache]: Analyzing trace with hash -66301374, now seen corresponding path program 8 times [2024-06-04 14:20:16,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:16,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209046699] [2024-06-04 14:20:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:16,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:16,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:16,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209046699] [2024-06-04 14:20:16,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209046699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:16,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:16,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:20:16,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296938037] [2024-06-04 14:20:16,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:16,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:20:16,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:16,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:20:16,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:20:16,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:16,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 512 transitions, 6691 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:16,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:16,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:16,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:17,368 INFO L124 PetriNetUnfolderBase]: 3090/5270 cut-off events. [2024-06-04 14:20:17,369 INFO L125 PetriNetUnfolderBase]: For 530405/530411 co-relation queries the response was YES. [2024-06-04 14:20:17,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36902 conditions, 5270 events. 3090/5270 cut-off events. For 530405/530411 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 35894 event pairs, 606 based on Foata normal form. 5/5269 useless extension candidates. Maximal degree in co-relation 36722. Up to 4481 conditions per place. [2024-06-04 14:20:17,444 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 383 selfloop transitions, 145 changer transitions 0/535 dead transitions. [2024-06-04 14:20:17,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 535 transitions, 8231 flow [2024-06-04 14:20:17,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:20:17,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:20:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 14:20:17,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 14:20:17,445 INFO L175 Difference]: Start difference. First operand has 382 places, 512 transitions, 6691 flow. Second operand 8 states and 189 transitions. [2024-06-04 14:20:17,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 535 transitions, 8231 flow [2024-06-04 14:20:20,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 535 transitions, 7911 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 14:20:20,055 INFO L231 Difference]: Finished difference. Result has 383 places, 515 transitions, 6699 flow [2024-06-04 14:20:20,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6379, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6699, PETRI_PLACES=383, PETRI_TRANSITIONS=515} [2024-06-04 14:20:20,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-04 14:20:20,056 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 515 transitions, 6699 flow [2024-06-04 14:20:20,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:20,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:20,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:20,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 14:20:20,056 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:20,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:20,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2067592896, now seen corresponding path program 11 times [2024-06-04 14:20:20,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:20,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054763529] [2024-06-04 14:20:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:20,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:20,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:20,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054763529] [2024-06-04 14:20:20,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054763529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:20,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:20,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:20:20,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261413920] [2024-06-04 14:20:20,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:20,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:20:20,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:20,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:20:20,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:20:20,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:20,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 515 transitions, 6699 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:20:20,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:20,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:20,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:21,229 INFO L124 PetriNetUnfolderBase]: 3087/5245 cut-off events. [2024-06-04 14:20:21,229 INFO L125 PetriNetUnfolderBase]: For 515248/515248 co-relation queries the response was YES. [2024-06-04 14:20:21,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36632 conditions, 5245 events. 3087/5245 cut-off events. For 515248/515248 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 35651 event pairs, 591 based on Foata normal form. 1/5234 useless extension candidates. Maximal degree in co-relation 36452. Up to 4459 conditions per place. [2024-06-04 14:20:21,296 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 399 selfloop transitions, 142 changer transitions 0/548 dead transitions. [2024-06-04 14:20:21,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 548 transitions, 8271 flow [2024-06-04 14:20:21,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:20:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:20:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-04 14:20:21,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-04 14:20:21,297 INFO L175 Difference]: Start difference. First operand has 383 places, 515 transitions, 6699 flow. Second operand 9 states and 220 transitions. [2024-06-04 14:20:21,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 548 transitions, 8271 flow [2024-06-04 14:20:23,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 548 transitions, 8067 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 14:20:23,436 INFO L231 Difference]: Finished difference. Result has 387 places, 515 transitions, 6797 flow [2024-06-04 14:20:23,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6495, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6797, PETRI_PLACES=387, PETRI_TRANSITIONS=515} [2024-06-04 14:20:23,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-04 14:20:23,437 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 515 transitions, 6797 flow [2024-06-04 14:20:23,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:20:23,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:23,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:23,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 14:20:23,437 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:23,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:23,438 INFO L85 PathProgramCache]: Analyzing trace with hash -289826874, now seen corresponding path program 9 times [2024-06-04 14:20:23,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:23,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280190238] [2024-06-04 14:20:23,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:23,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:23,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:23,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280190238] [2024-06-04 14:20:23,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280190238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:23,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:23,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:20:23,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537160378] [2024-06-04 14:20:23,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:23,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:20:23,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:23,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:20:23,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:20:23,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:23,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 515 transitions, 6797 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:20:23,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:23,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:23,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:24,503 INFO L124 PetriNetUnfolderBase]: 3092/5252 cut-off events. [2024-06-04 14:20:24,503 INFO L125 PetriNetUnfolderBase]: For 525510/525510 co-relation queries the response was YES. [2024-06-04 14:20:24,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36834 conditions, 5252 events. 3092/5252 cut-off events. For 525510/525510 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 35684 event pairs, 613 based on Foata normal form. 1/5241 useless extension candidates. Maximal degree in co-relation 36652. Up to 4483 conditions per place. [2024-06-04 14:20:24,580 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 376 selfloop transitions, 154 changer transitions 0/537 dead transitions. [2024-06-04 14:20:24,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 537 transitions, 8562 flow [2024-06-04 14:20:24,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:20:24,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:20:24,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 14:20:24,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-04 14:20:24,581 INFO L175 Difference]: Start difference. First operand has 387 places, 515 transitions, 6797 flow. Second operand 6 states and 151 transitions. [2024-06-04 14:20:24,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 537 transitions, 8562 flow [2024-06-04 14:20:27,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 537 transitions, 8246 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-04 14:20:27,265 INFO L231 Difference]: Finished difference. Result has 383 places, 518 transitions, 6862 flow [2024-06-04 14:20:27,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6499, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6862, PETRI_PLACES=383, PETRI_TRANSITIONS=518} [2024-06-04 14:20:27,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-04 14:20:27,266 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 518 transitions, 6862 flow [2024-06-04 14:20:27,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:20:27,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:27,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:27,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 14:20:27,266 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:27,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:27,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2012541798, now seen corresponding path program 10 times [2024-06-04 14:20:27,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:27,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891546534] [2024-06-04 14:20:27,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:27,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:27,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:27,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891546534] [2024-06-04 14:20:27,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891546534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:27,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:27,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:20:27,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014495225] [2024-06-04 14:20:27,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:27,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:20:27,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:27,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:20:27,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:20:27,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:27,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 518 transitions, 6862 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:20:27,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:27,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:27,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:28,329 INFO L124 PetriNetUnfolderBase]: 3105/5272 cut-off events. [2024-06-04 14:20:28,329 INFO L125 PetriNetUnfolderBase]: For 512328/512328 co-relation queries the response was YES. [2024-06-04 14:20:28,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36865 conditions, 5272 events. 3105/5272 cut-off events. For 512328/512328 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35864 event pairs, 613 based on Foata normal form. 1/5261 useless extension candidates. Maximal degree in co-relation 36684. Up to 4498 conditions per place. [2024-06-04 14:20:28,405 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 374 selfloop transitions, 159 changer transitions 0/540 dead transitions. [2024-06-04 14:20:28,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 540 transitions, 8666 flow [2024-06-04 14:20:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:20:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:20:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 14:20:28,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 14:20:28,407 INFO L175 Difference]: Start difference. First operand has 383 places, 518 transitions, 6862 flow. Second operand 6 states and 148 transitions. [2024-06-04 14:20:28,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 540 transitions, 8666 flow [2024-06-04 14:20:30,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 540 transitions, 8339 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 14:20:30,751 INFO L231 Difference]: Finished difference. Result has 383 places, 524 transitions, 6969 flow [2024-06-04 14:20:30,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6556, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6969, PETRI_PLACES=383, PETRI_TRANSITIONS=524} [2024-06-04 14:20:30,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-04 14:20:30,752 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 524 transitions, 6969 flow [2024-06-04 14:20:30,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:20:30,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:30,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:30,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 14:20:30,752 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:30,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:30,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2018434278, now seen corresponding path program 11 times [2024-06-04 14:20:30,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:30,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030165032] [2024-06-04 14:20:30,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:30,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:30,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:30,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030165032] [2024-06-04 14:20:30,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030165032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:30,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:30,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:20:30,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178970140] [2024-06-04 14:20:30,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:30,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:20:30,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:30,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:20:30,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:20:30,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:30,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 524 transitions, 6969 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:30,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:30,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:30,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:31,886 INFO L124 PetriNetUnfolderBase]: 3115/5311 cut-off events. [2024-06-04 14:20:31,886 INFO L125 PetriNetUnfolderBase]: For 504070/504076 co-relation queries the response was YES. [2024-06-04 14:20:31,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36894 conditions, 5311 events. 3115/5311 cut-off events. For 504070/504076 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 36279 event pairs, 608 based on Foata normal form. 5/5310 useless extension candidates. Maximal degree in co-relation 36715. Up to 4508 conditions per place. [2024-06-04 14:20:31,964 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 386 selfloop transitions, 158 changer transitions 0/551 dead transitions. [2024-06-04 14:20:31,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 551 transitions, 8805 flow [2024-06-04 14:20:31,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:20:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:20:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 14:20:31,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 14:20:31,965 INFO L175 Difference]: Start difference. First operand has 383 places, 524 transitions, 6969 flow. Second operand 8 states and 191 transitions. [2024-06-04 14:20:31,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 551 transitions, 8805 flow [2024-06-04 14:20:34,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 551 transitions, 8547 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-04 14:20:34,199 INFO L231 Difference]: Finished difference. Result has 389 places, 530 transitions, 7151 flow [2024-06-04 14:20:34,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6736, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7151, PETRI_PLACES=389, PETRI_TRANSITIONS=530} [2024-06-04 14:20:34,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-04 14:20:34,199 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 530 transitions, 7151 flow [2024-06-04 14:20:34,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:34,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:34,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:34,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 14:20:34,200 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:34,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:34,200 INFO L85 PathProgramCache]: Analyzing trace with hash 28502364, now seen corresponding path program 12 times [2024-06-04 14:20:34,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:34,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626360403] [2024-06-04 14:20:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:34,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:34,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:34,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626360403] [2024-06-04 14:20:34,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626360403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:34,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:34,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:20:34,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953221772] [2024-06-04 14:20:34,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:34,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:20:34,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:34,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:20:34,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:20:34,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:34,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 530 transitions, 7151 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:34,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:34,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:34,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:35,331 INFO L124 PetriNetUnfolderBase]: 3112/5307 cut-off events. [2024-06-04 14:20:35,331 INFO L125 PetriNetUnfolderBase]: For 500499/500505 co-relation queries the response was YES. [2024-06-04 14:20:35,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36811 conditions, 5307 events. 3112/5307 cut-off events. For 500499/500505 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 36209 event pairs, 611 based on Foata normal form. 5/5306 useless extension candidates. Maximal degree in co-relation 36631. Up to 4505 conditions per place. [2024-06-04 14:20:35,412 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 385 selfloop transitions, 158 changer transitions 0/550 dead transitions. [2024-06-04 14:20:35,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 550 transitions, 8685 flow [2024-06-04 14:20:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:20:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:20:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-04 14:20:35,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-04 14:20:35,413 INFO L175 Difference]: Start difference. First operand has 389 places, 530 transitions, 7151 flow. Second operand 8 states and 190 transitions. [2024-06-04 14:20:35,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 550 transitions, 8685 flow [2024-06-04 14:20:37,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 550 transitions, 8465 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 14:20:37,979 INFO L231 Difference]: Finished difference. Result has 393 places, 530 transitions, 7253 flow [2024-06-04 14:20:37,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6931, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7253, PETRI_PLACES=393, PETRI_TRANSITIONS=530} [2024-06-04 14:20:37,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-04 14:20:37,979 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 530 transitions, 7253 flow [2024-06-04 14:20:37,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:37,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:37,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:37,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 14:20:37,980 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:37,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:37,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1890764168, now seen corresponding path program 12 times [2024-06-04 14:20:37,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:37,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431681277] [2024-06-04 14:20:37,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:37,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:38,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:38,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431681277] [2024-06-04 14:20:38,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431681277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:38,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:38,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:20:38,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567267031] [2024-06-04 14:20:38,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:38,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:20:38,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:38,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:20:38,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:20:38,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:38,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 530 transitions, 7253 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:38,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:38,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:38,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:39,224 INFO L124 PetriNetUnfolderBase]: 3125/5329 cut-off events. [2024-06-04 14:20:39,224 INFO L125 PetriNetUnfolderBase]: For 516257/516263 co-relation queries the response was YES. [2024-06-04 14:20:39,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37142 conditions, 5329 events. 3125/5329 cut-off events. For 516257/516263 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 36393 event pairs, 585 based on Foata normal form. 5/5328 useless extension candidates. Maximal degree in co-relation 36960. Up to 4662 conditions per place. [2024-06-04 14:20:39,299 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 472 selfloop transitions, 79 changer transitions 0/558 dead transitions. [2024-06-04 14:20:39,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 558 transitions, 8875 flow [2024-06-04 14:20:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:20:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:20:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-04 14:20:39,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-04 14:20:39,300 INFO L175 Difference]: Start difference. First operand has 393 places, 530 transitions, 7253 flow. Second operand 10 states and 222 transitions. [2024-06-04 14:20:39,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 558 transitions, 8875 flow [2024-06-04 14:20:41,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 558 transitions, 8441 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:20:41,974 INFO L231 Difference]: Finished difference. Result has 396 places, 536 transitions, 7064 flow [2024-06-04 14:20:41,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6819, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7064, PETRI_PLACES=396, PETRI_TRANSITIONS=536} [2024-06-04 14:20:41,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-04 14:20:41,976 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 536 transitions, 7064 flow [2024-06-04 14:20:41,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:41,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:41,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:41,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 14:20:41,976 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:41,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:41,977 INFO L85 PathProgramCache]: Analyzing trace with hash -251737622, now seen corresponding path program 1 times [2024-06-04 14:20:41,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:41,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619101062] [2024-06-04 14:20:41,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:41,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:42,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:42,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619101062] [2024-06-04 14:20:42,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619101062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:42,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:42,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:20:42,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949436484] [2024-06-04 14:20:42,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:42,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:20:42,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:20:42,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:20:42,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:42,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 536 transitions, 7064 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:42,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:42,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:42,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:43,189 INFO L124 PetriNetUnfolderBase]: 3260/5554 cut-off events. [2024-06-04 14:20:43,189 INFO L125 PetriNetUnfolderBase]: For 656258/656264 co-relation queries the response was YES. [2024-06-04 14:20:43,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39726 conditions, 5554 events. 3260/5554 cut-off events. For 656258/656264 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 38099 event pairs, 553 based on Foata normal form. 16/5564 useless extension candidates. Maximal degree in co-relation 39543. Up to 4446 conditions per place. [2024-06-04 14:20:43,273 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 400 selfloop transitions, 174 changer transitions 0/581 dead transitions. [2024-06-04 14:20:43,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 581 transitions, 9050 flow [2024-06-04 14:20:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:20:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:20:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-04 14:20:43,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-04 14:20:43,274 INFO L175 Difference]: Start difference. First operand has 396 places, 536 transitions, 7064 flow. Second operand 8 states and 204 transitions. [2024-06-04 14:20:43,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 581 transitions, 9050 flow [2024-06-04 14:20:46,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 581 transitions, 8890 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-04 14:20:46,329 INFO L231 Difference]: Finished difference. Result has 398 places, 543 transitions, 7379 flow [2024-06-04 14:20:46,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6904, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7379, PETRI_PLACES=398, PETRI_TRANSITIONS=543} [2024-06-04 14:20:46,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-04 14:20:46,329 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 543 transitions, 7379 flow [2024-06-04 14:20:46,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:46,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:46,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:46,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 14:20:46,330 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:46,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash 13959658, now seen corresponding path program 2 times [2024-06-04 14:20:46,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:46,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429522973] [2024-06-04 14:20:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:46,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:46,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:46,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429522973] [2024-06-04 14:20:46,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429522973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:46,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:46,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:20:46,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609650718] [2024-06-04 14:20:46,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:46,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:20:46,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:46,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:20:46,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:20:46,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:46,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 543 transitions, 7379 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:46,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:46,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:46,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:47,604 INFO L124 PetriNetUnfolderBase]: 3408/5782 cut-off events. [2024-06-04 14:20:47,604 INFO L125 PetriNetUnfolderBase]: For 761269/761275 co-relation queries the response was YES. [2024-06-04 14:20:47,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43338 conditions, 5782 events. 3408/5782 cut-off events. For 761269/761275 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 39673 event pairs, 671 based on Foata normal form. 16/5792 useless extension candidates. Maximal degree in co-relation 43154. Up to 4800 conditions per place. [2024-06-04 14:20:47,692 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 170 changer transitions 0/584 dead transitions. [2024-06-04 14:20:47,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 584 transitions, 9381 flow [2024-06-04 14:20:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:20:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:20:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 14:20:47,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-04 14:20:47,693 INFO L175 Difference]: Start difference. First operand has 398 places, 543 transitions, 7379 flow. Second operand 8 states and 201 transitions. [2024-06-04 14:20:47,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 584 transitions, 9381 flow [2024-06-04 14:20:51,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 584 transitions, 9135 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-04 14:20:51,091 INFO L231 Difference]: Finished difference. Result has 404 places, 550 transitions, 7622 flow [2024-06-04 14:20:51,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7141, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7622, PETRI_PLACES=404, PETRI_TRANSITIONS=550} [2024-06-04 14:20:51,091 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-04 14:20:51,091 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 550 transitions, 7622 flow [2024-06-04 14:20:51,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:51,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:51,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:51,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 14:20:51,092 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:51,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash 14286088, now seen corresponding path program 3 times [2024-06-04 14:20:51,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:51,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689831577] [2024-06-04 14:20:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:51,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:51,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:51,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689831577] [2024-06-04 14:20:51,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689831577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:51,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:51,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:20:51,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549265443] [2024-06-04 14:20:51,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:51,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:20:51,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:51,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:20:51,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:20:51,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:51,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 550 transitions, 7622 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:51,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:51,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:51,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:52,397 INFO L124 PetriNetUnfolderBase]: 3372/5730 cut-off events. [2024-06-04 14:20:52,397 INFO L125 PetriNetUnfolderBase]: For 708998/709004 co-relation queries the response was YES. [2024-06-04 14:20:52,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41740 conditions, 5730 events. 3372/5730 cut-off events. For 708998/709004 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 39370 event pairs, 667 based on Foata normal form. 20/5744 useless extension candidates. Maximal degree in co-relation 41553. Up to 4844 conditions per place. [2024-06-04 14:20:52,481 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 166 changer transitions 0/580 dead transitions. [2024-06-04 14:20:52,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 580 transitions, 9272 flow [2024-06-04 14:20:52,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:20:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:20:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 14:20:52,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-04 14:20:52,483 INFO L175 Difference]: Start difference. First operand has 404 places, 550 transitions, 7622 flow. Second operand 8 states and 197 transitions. [2024-06-04 14:20:52,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 580 transitions, 9272 flow [2024-06-04 14:20:55,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 580 transitions, 9020 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 14:20:55,405 INFO L231 Difference]: Finished difference. Result has 408 places, 550 transitions, 7708 flow [2024-06-04 14:20:55,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7370, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7708, PETRI_PLACES=408, PETRI_TRANSITIONS=550} [2024-06-04 14:20:55,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-04 14:20:55,406 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 550 transitions, 7708 flow [2024-06-04 14:20:55,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:55,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:20:55,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:20:55,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 14:20:55,406 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:20:55,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:20:55,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1071212250, now seen corresponding path program 4 times [2024-06-04 14:20:55,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:20:55,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248141513] [2024-06-04 14:20:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:20:55,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:20:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:20:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:20:55,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:20:55,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248141513] [2024-06-04 14:20:55,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248141513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:20:55,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:20:55,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:20:55,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155011345] [2024-06-04 14:20:55,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:20:55,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:20:55,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:20:55,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:20:55,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:20:55,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:20:55,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 550 transitions, 7708 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:20:55,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:20:55,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:20:55,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:20:56,668 INFO L124 PetriNetUnfolderBase]: 3428/5818 cut-off events. [2024-06-04 14:20:56,669 INFO L125 PetriNetUnfolderBase]: For 721631/721637 co-relation queries the response was YES. [2024-06-04 14:20:56,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42541 conditions, 5818 events. 3428/5818 cut-off events. For 721631/721637 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 40039 event pairs, 675 based on Foata normal form. 20/5832 useless extension candidates. Maximal degree in co-relation 42352. Up to 4932 conditions per place. [2024-06-04 14:20:56,755 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 161 changer transitions 0/576 dead transitions. [2024-06-04 14:20:56,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 576 transitions, 9388 flow [2024-06-04 14:20:56,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:20:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:20:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 14:20:56,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 14:20:56,756 INFO L175 Difference]: Start difference. First operand has 408 places, 550 transitions, 7708 flow. Second operand 8 states and 192 transitions. [2024-06-04 14:20:56,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 576 transitions, 9388 flow [2024-06-04 14:21:00,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 576 transitions, 9054 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 14:21:00,479 INFO L231 Difference]: Finished difference. Result has 410 places, 552 transitions, 7756 flow [2024-06-04 14:21:00,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7374, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7756, PETRI_PLACES=410, PETRI_TRANSITIONS=552} [2024-06-04 14:21:00,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-04 14:21:00,492 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 552 transitions, 7756 flow [2024-06-04 14:21:00,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:00,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:21:00,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:21:00,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 14:21:00,492 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:21:00,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:21:00,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1442110200, now seen corresponding path program 5 times [2024-06-04 14:21:00,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:21:00,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404534495] [2024-06-04 14:21:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:21:00,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:21:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:21:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:21:00,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:21:00,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404534495] [2024-06-04 14:21:00,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404534495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:21:00,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:21:00,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:21:00,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52949343] [2024-06-04 14:21:00,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:21:00,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:21:00,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:21:00,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:21:00,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:21:00,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:21:00,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 552 transitions, 7756 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:00,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:21:00,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:21:00,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:21:01,843 INFO L124 PetriNetUnfolderBase]: 3484/5914 cut-off events. [2024-06-04 14:21:01,843 INFO L125 PetriNetUnfolderBase]: For 736046/736052 co-relation queries the response was YES. [2024-06-04 14:21:01,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43313 conditions, 5914 events. 3484/5914 cut-off events. For 736046/736052 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 40774 event pairs, 687 based on Foata normal form. 20/5928 useless extension candidates. Maximal degree in co-relation 43123. Up to 5020 conditions per place. [2024-06-04 14:21:01,938 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 411 selfloop transitions, 160 changer transitions 0/578 dead transitions. [2024-06-04 14:21:01,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 578 transitions, 9448 flow [2024-06-04 14:21:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:21:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:21:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 14:21:01,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-04 14:21:01,940 INFO L175 Difference]: Start difference. First operand has 410 places, 552 transitions, 7756 flow. Second operand 8 states and 193 transitions. [2024-06-04 14:21:01,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 578 transitions, 9448 flow [2024-06-04 14:21:05,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 578 transitions, 9100 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 14:21:05,262 INFO L231 Difference]: Finished difference. Result has 412 places, 554 transitions, 7792 flow [2024-06-04 14:21:05,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7408, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7792, PETRI_PLACES=412, PETRI_TRANSITIONS=554} [2024-06-04 14:21:05,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-04 14:21:05,263 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 554 transitions, 7792 flow [2024-06-04 14:21:05,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:05,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:21:05,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:21:05,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 14:21:05,264 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:21:05,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:21:05,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1442436630, now seen corresponding path program 6 times [2024-06-04 14:21:05,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:21:05,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915610638] [2024-06-04 14:21:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:21:05,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:21:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:21:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:21:05,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:21:05,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915610638] [2024-06-04 14:21:05,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915610638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:21:05,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:21:05,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:21:05,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897372988] [2024-06-04 14:21:05,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:21:05,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:21:05,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:21:05,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:21:05,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:21:05,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:21:05,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 554 transitions, 7792 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:05,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:21:05,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:21:05,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:21:06,583 INFO L124 PetriNetUnfolderBase]: 3540/6002 cut-off events. [2024-06-04 14:21:06,584 INFO L125 PetriNetUnfolderBase]: For 727312/727318 co-relation queries the response was YES. [2024-06-04 14:21:06,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43868 conditions, 6002 events. 3540/6002 cut-off events. For 727312/727318 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41455 event pairs, 683 based on Foata normal form. 16/6012 useless extension candidates. Maximal degree in co-relation 43677. Up to 4984 conditions per place. [2024-06-04 14:21:06,672 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 166 changer transitions 0/586 dead transitions. [2024-06-04 14:21:06,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 586 transitions, 9554 flow [2024-06-04 14:21:06,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:21:06,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:21:06,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 14:21:06,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-04 14:21:06,673 INFO L175 Difference]: Start difference. First operand has 412 places, 554 transitions, 7792 flow. Second operand 8 states and 195 transitions. [2024-06-04 14:21:06,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 586 transitions, 9554 flow [2024-06-04 14:21:10,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 586 transitions, 9204 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 14:21:10,223 INFO L231 Difference]: Finished difference. Result has 415 places, 559 transitions, 7891 flow [2024-06-04 14:21:10,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7442, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7891, PETRI_PLACES=415, PETRI_TRANSITIONS=559} [2024-06-04 14:21:10,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-04 14:21:10,223 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 559 transitions, 7891 flow [2024-06-04 14:21:10,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:10,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:21:10,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:21:10,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 14:21:10,224 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:21:10,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:21:10,224 INFO L85 PathProgramCache]: Analyzing trace with hash -196720386, now seen corresponding path program 1 times [2024-06-04 14:21:10,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:21:10,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722271590] [2024-06-04 14:21:10,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:21:10,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:21:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:21:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:21:10,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:21:10,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722271590] [2024-06-04 14:21:10,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722271590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:21:10,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:21:10,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:21:10,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97903644] [2024-06-04 14:21:10,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:21:10,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:21:10,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:21:10,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:21:10,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:21:10,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:21:10,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 559 transitions, 7891 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:10,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:21:10,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:21:10,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:21:11,646 INFO L124 PetriNetUnfolderBase]: 3580/6074 cut-off events. [2024-06-04 14:21:11,646 INFO L125 PetriNetUnfolderBase]: For 741083/741089 co-relation queries the response was YES. [2024-06-04 14:21:11,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44392 conditions, 6074 events. 3580/6074 cut-off events. For 741083/741089 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 42034 event pairs, 695 based on Foata normal form. 16/6084 useless extension candidates. Maximal degree in co-relation 44199. Up to 4984 conditions per place. [2024-06-04 14:21:11,731 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 412 selfloop transitions, 169 changer transitions 0/588 dead transitions. [2024-06-04 14:21:11,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 588 transitions, 9621 flow [2024-06-04 14:21:11,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:21:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:21:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 14:21:11,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-04 14:21:11,732 INFO L175 Difference]: Start difference. First operand has 415 places, 559 transitions, 7891 flow. Second operand 8 states and 194 transitions. [2024-06-04 14:21:11,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 588 transitions, 9621 flow [2024-06-04 14:21:15,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 588 transitions, 9252 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 14:21:15,321 INFO L231 Difference]: Finished difference. Result has 418 places, 561 transitions, 7919 flow [2024-06-04 14:21:15,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7522, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7919, PETRI_PLACES=418, PETRI_TRANSITIONS=561} [2024-06-04 14:21:15,322 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-04 14:21:15,322 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 561 transitions, 7919 flow [2024-06-04 14:21:15,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:15,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:21:15,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:21:15,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 14:21:15,323 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:21:15,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:21:15,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2144049904, now seen corresponding path program 1 times [2024-06-04 14:21:15,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:21:15,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100612886] [2024-06-04 14:21:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:21:15,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:21:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:21:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:21:15,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:21:15,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100612886] [2024-06-04 14:21:15,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100612886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:21:15,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:21:15,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:21:15,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691630423] [2024-06-04 14:21:15,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:21:15,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:21:15,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:21:15,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:21:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:21:15,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:21:15,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 561 transitions, 7919 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:15,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:21:15,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:21:15,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:21:16,657 INFO L124 PetriNetUnfolderBase]: 3588/6083 cut-off events. [2024-06-04 14:21:16,657 INFO L125 PetriNetUnfolderBase]: For 692972/692978 co-relation queries the response was YES. [2024-06-04 14:21:16,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44504 conditions, 6083 events. 3588/6083 cut-off events. For 692972/692978 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 42029 event pairs, 674 based on Foata normal form. 6/6084 useless extension candidates. Maximal degree in co-relation 44310. Up to 5427 conditions per place. [2024-06-04 14:21:16,747 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 508 selfloop transitions, 67 changer transitions 0/582 dead transitions. [2024-06-04 14:21:16,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 582 transitions, 9179 flow [2024-06-04 14:21:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:21:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:21:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 14:21:16,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 14:21:16,748 INFO L175 Difference]: Start difference. First operand has 418 places, 561 transitions, 7919 flow. Second operand 8 states and 182 transitions. [2024-06-04 14:21:16,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 582 transitions, 9179 flow [2024-06-04 14:21:20,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 582 transitions, 8804 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 14:21:20,667 INFO L231 Difference]: Finished difference. Result has 420 places, 563 transitions, 7751 flow [2024-06-04 14:21:20,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7544, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7751, PETRI_PLACES=420, PETRI_TRANSITIONS=563} [2024-06-04 14:21:20,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-04 14:21:20,670 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 563 transitions, 7751 flow [2024-06-04 14:21:20,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:20,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:21:20,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:21:20,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 14:21:20,671 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:21:20,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:21:20,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1347222244, now seen corresponding path program 2 times [2024-06-04 14:21:20,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:21:20,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749688725] [2024-06-04 14:21:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:21:20,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:21:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:21:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:21:20,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:21:20,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749688725] [2024-06-04 14:21:20,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749688725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:21:20,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:21:20,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:21:20,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376974790] [2024-06-04 14:21:20,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:21:20,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:21:20,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:21:20,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:21:20,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:21:20,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:21:20,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 563 transitions, 7751 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:20,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:21:20,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:21:20,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:21:22,064 INFO L124 PetriNetUnfolderBase]: 3596/6091 cut-off events. [2024-06-04 14:21:22,064 INFO L125 PetriNetUnfolderBase]: For 703269/703275 co-relation queries the response was YES. [2024-06-04 14:21:22,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44228 conditions, 6091 events. 3596/6091 cut-off events. For 703269/703275 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42089 event pairs, 666 based on Foata normal form. 6/6092 useless extension candidates. Maximal degree in co-relation 44033. Up to 5419 conditions per place. [2024-06-04 14:21:22,155 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 507 selfloop transitions, 72 changer transitions 0/586 dead transitions. [2024-06-04 14:21:22,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 586 transitions, 9027 flow [2024-06-04 14:21:22,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:21:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:21:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-04 14:21:22,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-04 14:21:22,156 INFO L175 Difference]: Start difference. First operand has 420 places, 563 transitions, 7751 flow. Second operand 9 states and 201 transitions. [2024-06-04 14:21:22,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 586 transitions, 9027 flow [2024-06-04 14:21:26,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 586 transitions, 8836 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-04 14:21:26,243 INFO L231 Difference]: Finished difference. Result has 423 places, 565 transitions, 7781 flow [2024-06-04 14:21:26,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7560, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7781, PETRI_PLACES=423, PETRI_TRANSITIONS=565} [2024-06-04 14:21:26,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-04 14:21:26,244 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 565 transitions, 7781 flow [2024-06-04 14:21:26,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:21:26,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:21:26,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:21:26,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 14:21:26,244 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:21:26,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:21:26,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2096488546, now seen corresponding path program 13 times [2024-06-04 14:21:26,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:21:26,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224465558] [2024-06-04 14:21:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:21:26,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:21:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:21:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:21:26,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:21:26,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224465558] [2024-06-04 14:21:26,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224465558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:21:26,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:21:26,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:21:26,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954875554] [2024-06-04 14:21:26,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:21:26,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:21:26,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:21:26,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:21:26,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:21:26,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:21:26,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 565 transitions, 7781 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:21:26,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:21:26,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:21:26,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:21:27,555 INFO L124 PetriNetUnfolderBase]: 3617/6129 cut-off events. [2024-06-04 14:21:27,555 INFO L125 PetriNetUnfolderBase]: For 722763/722769 co-relation queries the response was YES. [2024-06-04 14:21:27,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44719 conditions, 6129 events. 3617/6129 cut-off events. For 722763/722769 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42408 event pairs, 723 based on Foata normal form. 1/6122 useless extension candidates. Maximal degree in co-relation 44523. Up to 5226 conditions per place. [2024-06-04 14:21:27,653 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 431 selfloop transitions, 165 changer transitions 0/603 dead transitions. [2024-06-04 14:21:27,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 603 transitions, 9817 flow [2024-06-04 14:21:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:21:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:21:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 14:21:27,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-04 14:21:27,655 INFO L175 Difference]: Start difference. First operand has 423 places, 565 transitions, 7781 flow. Second operand 7 states and 179 transitions. [2024-06-04 14:21:27,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 603 transitions, 9817 flow [2024-06-04 14:21:31,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 603 transitions, 9612 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-04 14:21:31,340 INFO L231 Difference]: Finished difference. Result has 423 places, 574 transitions, 8018 flow [2024-06-04 14:21:31,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7576, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8018, PETRI_PLACES=423, PETRI_TRANSITIONS=574} [2024-06-04 14:21:31,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-04 14:21:31,341 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 574 transitions, 8018 flow [2024-06-04 14:21:31,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:21:31,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:21:31,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:21:31,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 14:21:31,341 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:21:31,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:21:31,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2096608516, now seen corresponding path program 14 times [2024-06-04 14:21:31,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:21:31,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701198622] [2024-06-04 14:21:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:21:31,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:21:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:21:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:21:31,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:21:31,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701198622] [2024-06-04 14:21:31,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701198622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:21:31,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:21:31,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:21:31,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535557792] [2024-06-04 14:21:31,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:21:31,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:21:31,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:21:31,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:21:31,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:21:31,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:21:31,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 574 transitions, 8018 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:21:31,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:21:31,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:21:31,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:21:32,702 INFO L124 PetriNetUnfolderBase]: 3614/6127 cut-off events. [2024-06-04 14:21:32,702 INFO L125 PetriNetUnfolderBase]: For 728724/728730 co-relation queries the response was YES. [2024-06-04 14:21:32,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44835 conditions, 6127 events. 3614/6127 cut-off events. For 728724/728730 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42468 event pairs, 683 based on Foata normal form. 5/6126 useless extension candidates. Maximal degree in co-relation 44638. Up to 5437 conditions per place. [2024-06-04 14:21:32,804 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 518 selfloop transitions, 72 changer transitions 0/597 dead transitions. [2024-06-04 14:21:32,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 597 transitions, 9256 flow [2024-06-04 14:21:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:21:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:21:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 14:21:32,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 14:21:32,806 INFO L175 Difference]: Start difference. First operand has 423 places, 574 transitions, 8018 flow. Second operand 7 states and 170 transitions. [2024-06-04 14:21:32,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 597 transitions, 9256 flow [2024-06-04 14:21:37,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 597 transitions, 8892 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 14:21:37,040 INFO L231 Difference]: Finished difference. Result has 426 places, 574 transitions, 7804 flow [2024-06-04 14:21:37,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7654, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7804, PETRI_PLACES=426, PETRI_TRANSITIONS=574} [2024-06-04 14:21:37,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-04 14:21:37,041 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 574 transitions, 7804 flow [2024-06-04 14:21:37,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:21:37,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:21:37,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:21:37,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 14:21:37,042 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:21:37,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:21:37,042 INFO L85 PathProgramCache]: Analyzing trace with hash -210019862, now seen corresponding path program 15 times [2024-06-04 14:21:37,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:21:37,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44124577] [2024-06-04 14:21:37,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:21:37,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:21:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:21:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:21:37,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:21:37,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44124577] [2024-06-04 14:21:37,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44124577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:21:37,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:21:37,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:21:37,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987413653] [2024-06-04 14:21:37,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:21:37,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:21:37,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:21:37,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:21:37,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:21:37,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:21:37,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 574 transitions, 7804 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:21:37,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:21:37,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:21:37,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:21:38,471 INFO L124 PetriNetUnfolderBase]: 3635/6148 cut-off events. [2024-06-04 14:21:38,471 INFO L125 PetriNetUnfolderBase]: For 754906/754912 co-relation queries the response was YES. [2024-06-04 14:21:38,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45045 conditions, 6148 events. 3635/6148 cut-off events. For 754906/754912 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 42636 event pairs, 714 based on Foata normal form. 5/6141 useless extension candidates. Maximal degree in co-relation 44847. Up to 5247 conditions per place. [2024-06-04 14:21:38,559 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 428 selfloop transitions, 170 changer transitions 0/605 dead transitions. [2024-06-04 14:21:38,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 605 transitions, 9606 flow [2024-06-04 14:21:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:21:38,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:21:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 14:21:38,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-04 14:21:38,560 INFO L175 Difference]: Start difference. First operand has 426 places, 574 transitions, 7804 flow. Second operand 7 states and 169 transitions. [2024-06-04 14:21:38,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 605 transitions, 9606 flow [2024-06-04 14:21:42,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 605 transitions, 9450 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 14:21:42,514 INFO L231 Difference]: Finished difference. Result has 426 places, 583 transitions, 8094 flow [2024-06-04 14:21:42,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7648, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8094, PETRI_PLACES=426, PETRI_TRANSITIONS=583} [2024-06-04 14:21:42,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-04 14:21:42,514 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 583 transitions, 8094 flow [2024-06-04 14:21:42,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:21:42,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:21:42,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:21:42,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 14:21:42,515 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:21:42,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:21:42,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1161480974, now seen corresponding path program 16 times [2024-06-04 14:21:42,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:21:42,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232212172] [2024-06-04 14:21:42,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:21:42,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:21:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:21:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:21:42,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:21:42,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232212172] [2024-06-04 14:21:42,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232212172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:21:42,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:21:42,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:21:42,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42355952] [2024-06-04 14:21:42,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:21:42,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:21:42,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:21:42,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:21:42,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:21:42,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:21:42,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 583 transitions, 8094 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:21:42,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:21:42,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:21:42,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:21:43,884 INFO L124 PetriNetUnfolderBase]: 3640/6167 cut-off events. [2024-06-04 14:21:43,884 INFO L125 PetriNetUnfolderBase]: For 766301/766307 co-relation queries the response was YES. [2024-06-04 14:21:43,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45471 conditions, 6167 events. 3640/6167 cut-off events. For 766301/766307 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42710 event pairs, 723 based on Foata normal form. 1/6160 useless extension candidates. Maximal degree in co-relation 45272. Up to 5253 conditions per place. [2024-06-04 14:21:43,984 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 434 selfloop transitions, 172 changer transitions 0/613 dead transitions. [2024-06-04 14:21:43,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 613 transitions, 10324 flow [2024-06-04 14:21:43,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:21:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:21:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 14:21:43,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-04 14:21:43,985 INFO L175 Difference]: Start difference. First operand has 426 places, 583 transitions, 8094 flow. Second operand 7 states and 177 transitions. [2024-06-04 14:21:43,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 613 transitions, 10324 flow [2024-06-04 14:21:48,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 613 transitions, 10060 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-04 14:21:48,782 INFO L231 Difference]: Finished difference. Result has 430 places, 586 transitions, 8220 flow [2024-06-04 14:21:48,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7841, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8220, PETRI_PLACES=430, PETRI_TRANSITIONS=586} [2024-06-04 14:21:48,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-04 14:21:48,783 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 586 transitions, 8220 flow [2024-06-04 14:21:48,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:21:48,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:21:48,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:21:48,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 14:21:48,783 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:21:48,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:21:48,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2087514980, now seen corresponding path program 17 times [2024-06-04 14:21:48,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:21:48,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376487813] [2024-06-04 14:21:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:21:48,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:21:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:21:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:21:48,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:21:48,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376487813] [2024-06-04 14:21:48,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376487813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:21:48,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:21:48,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:21:48,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657520094] [2024-06-04 14:21:48,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:21:48,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:21:48,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:21:48,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:21:48,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:21:48,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:21:48,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 586 transitions, 8220 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:21:48,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:21:48,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:21:48,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:21:50,138 INFO L124 PetriNetUnfolderBase]: 3637/6163 cut-off events. [2024-06-04 14:21:50,139 INFO L125 PetriNetUnfolderBase]: For 772968/772974 co-relation queries the response was YES. [2024-06-04 14:21:50,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45464 conditions, 6163 events. 3637/6163 cut-off events. For 772968/772974 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42724 event pairs, 721 based on Foata normal form. 1/6156 useless extension candidates. Maximal degree in co-relation 45264. Up to 5250 conditions per place. [2024-06-04 14:21:50,238 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 170 changer transitions 0/609 dead transitions. [2024-06-04 14:21:50,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 609 transitions, 10170 flow [2024-06-04 14:21:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:21:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:21:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:21:50,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 14:21:50,240 INFO L175 Difference]: Start difference. First operand has 430 places, 586 transitions, 8220 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:21:50,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 609 transitions, 10170 flow [2024-06-04 14:21:54,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 609 transitions, 9663 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 14:21:54,840 INFO L231 Difference]: Finished difference. Result has 431 places, 586 transitions, 8059 flow [2024-06-04 14:21:54,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7713, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8059, PETRI_PLACES=431, PETRI_TRANSITIONS=586} [2024-06-04 14:21:54,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-04 14:21:54,841 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 586 transitions, 8059 flow [2024-06-04 14:21:54,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:21:54,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:21:54,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:21:54,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 14:21:54,842 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:21:54,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:21:54,842 INFO L85 PathProgramCache]: Analyzing trace with hash -321401828, now seen corresponding path program 18 times [2024-06-04 14:21:54,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:21:54,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783255952] [2024-06-04 14:21:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:21:54,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:21:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:21:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:21:54,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:21:54,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783255952] [2024-06-04 14:21:54,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783255952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:21:54,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:21:54,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:21:54,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171091814] [2024-06-04 14:21:54,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:21:54,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:21:54,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:21:54,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:21:54,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:21:54,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:21:54,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 586 transitions, 8059 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:21:54,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:21:54,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:21:54,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:21:56,184 INFO L124 PetriNetUnfolderBase]: 3642/6162 cut-off events. [2024-06-04 14:21:56,184 INFO L125 PetriNetUnfolderBase]: For 785731/785737 co-relation queries the response was YES. [2024-06-04 14:21:56,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45490 conditions, 6162 events. 3642/6162 cut-off events. For 785731/785737 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42732 event pairs, 714 based on Foata normal form. 5/6155 useless extension candidates. Maximal degree in co-relation 45289. Up to 5256 conditions per place. [2024-06-04 14:21:56,281 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 428 selfloop transitions, 173 changer transitions 0/608 dead transitions. [2024-06-04 14:21:56,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 608 transitions, 9803 flow [2024-06-04 14:21:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:21:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:21:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 14:21:56,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-04 14:21:56,283 INFO L175 Difference]: Start difference. First operand has 431 places, 586 transitions, 8059 flow. Second operand 7 states and 167 transitions. [2024-06-04 14:21:56,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 608 transitions, 9803 flow [2024-06-04 14:22:00,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 608 transitions, 9484 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 14:22:00,714 INFO L231 Difference]: Finished difference. Result has 434 places, 589 transitions, 8124 flow [2024-06-04 14:22:00,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7746, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8124, PETRI_PLACES=434, PETRI_TRANSITIONS=589} [2024-06-04 14:22:00,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-04 14:22:00,715 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 589 transitions, 8124 flow [2024-06-04 14:22:00,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:22:00,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:22:00,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:22:00,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 14:22:00,716 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:22:00,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:22:00,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1187112470, now seen corresponding path program 19 times [2024-06-04 14:22:00,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:22:00,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467166494] [2024-06-04 14:22:00,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:22:00,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:22:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:22:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:22:00,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:22:00,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467166494] [2024-06-04 14:22:00,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467166494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:22:00,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:22:00,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:22:00,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493426309] [2024-06-04 14:22:00,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:22:00,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:22:00,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:22:00,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:22:00,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:22:00,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:22:00,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 589 transitions, 8124 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:22:00,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:22:00,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:22:00,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:22:02,037 INFO L124 PetriNetUnfolderBase]: 3639/6158 cut-off events. [2024-06-04 14:22:02,037 INFO L125 PetriNetUnfolderBase]: For 791772/791778 co-relation queries the response was YES. [2024-06-04 14:22:02,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45480 conditions, 6158 events. 3639/6158 cut-off events. For 791772/791778 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42732 event pairs, 716 based on Foata normal form. 5/6151 useless extension candidates. Maximal degree in co-relation 45278. Up to 5253 conditions per place. [2024-06-04 14:22:02,135 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 420 selfloop transitions, 177 changer transitions 0/604 dead transitions. [2024-06-04 14:22:02,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 604 transitions, 9588 flow [2024-06-04 14:22:02,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:22:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:22:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-04 14:22:02,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-04 14:22:02,137 INFO L175 Difference]: Start difference. First operand has 434 places, 589 transitions, 8124 flow. Second operand 7 states and 162 transitions. [2024-06-04 14:22:02,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 604 transitions, 9588 flow [2024-06-04 14:22:07,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 604 transitions, 9253 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 14:22:07,075 INFO L231 Difference]: Finished difference. Result has 437 places, 589 transitions, 8149 flow [2024-06-04 14:22:07,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8149, PETRI_PLACES=437, PETRI_TRANSITIONS=589} [2024-06-04 14:22:07,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-04 14:22:07,076 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 589 transitions, 8149 flow [2024-06-04 14:22:07,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:22:07,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:22:07,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:22:07,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 14:22:07,076 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:22:07,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:22:07,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1230115602, now seen corresponding path program 20 times [2024-06-04 14:22:07,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:22:07,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298101688] [2024-06-04 14:22:07,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:22:07,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:22:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:22:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:22:07,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:22:07,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298101688] [2024-06-04 14:22:07,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298101688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:22:07,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:22:07,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:22:07,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154425632] [2024-06-04 14:22:07,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:22:07,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:22:07,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:22:07,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:22:07,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:22:07,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:22:07,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 589 transitions, 8149 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:22:07,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:22:07,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:22:07,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:22:08,473 INFO L124 PetriNetUnfolderBase]: 3636/6166 cut-off events. [2024-06-04 14:22:08,473 INFO L125 PetriNetUnfolderBase]: For 796221/796227 co-relation queries the response was YES. [2024-06-04 14:22:08,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45472 conditions, 6166 events. 3636/6166 cut-off events. For 796221/796227 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42878 event pairs, 683 based on Foata normal form. 5/6165 useless extension candidates. Maximal degree in co-relation 45269. Up to 5458 conditions per place. [2024-06-04 14:22:08,570 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 523 selfloop transitions, 79 changer transitions 0/609 dead transitions. [2024-06-04 14:22:08,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 609 transitions, 9637 flow [2024-06-04 14:22:08,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:22:08,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:22:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-04 14:22:08,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-04 14:22:08,571 INFO L175 Difference]: Start difference. First operand has 437 places, 589 transitions, 8149 flow. Second operand 9 states and 203 transitions. [2024-06-04 14:22:08,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 609 transitions, 9637 flow [2024-06-04 14:22:13,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 609 transitions, 9221 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 14:22:13,813 INFO L231 Difference]: Finished difference. Result has 440 places, 589 transitions, 7897 flow [2024-06-04 14:22:13,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7733, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7897, PETRI_PLACES=440, PETRI_TRANSITIONS=589} [2024-06-04 14:22:13,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-04 14:22:13,814 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 589 transitions, 7897 flow [2024-06-04 14:22:13,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:22:13,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:22:13,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:22:13,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 14:22:13,814 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:22:13,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:22:13,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1768107410, now seen corresponding path program 21 times [2024-06-04 14:22:13,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:22:13,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308977745] [2024-06-04 14:22:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:22:13,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:22:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:22:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:22:13,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:22:13,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308977745] [2024-06-04 14:22:13,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308977745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:22:13,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:22:13,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:22:13,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145946150] [2024-06-04 14:22:13,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:22:13,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:22:13,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:22:13,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:22:13,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:22:13,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:22:13,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 589 transitions, 7897 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:22:13,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:22:13,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:22:13,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:22:15,285 INFO L124 PetriNetUnfolderBase]: 3633/6162 cut-off events. [2024-06-04 14:22:15,285 INFO L125 PetriNetUnfolderBase]: For 801080/801086 co-relation queries the response was YES. [2024-06-04 14:22:15,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45065 conditions, 6162 events. 3633/6162 cut-off events. For 801080/801086 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 42764 event pairs, 681 based on Foata normal form. 5/6161 useless extension candidates. Maximal degree in co-relation 44862. Up to 5455 conditions per place. [2024-06-04 14:22:15,370 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 521 selfloop transitions, 78 changer transitions 0/606 dead transitions. [2024-06-04 14:22:15,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 606 transitions, 9137 flow [2024-06-04 14:22:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:22:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:22:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 14:22:15,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-04 14:22:15,371 INFO L175 Difference]: Start difference. First operand has 440 places, 589 transitions, 7897 flow. Second operand 7 states and 165 transitions. [2024-06-04 14:22:15,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 606 transitions, 9137 flow [2024-06-04 14:22:20,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 606 transitions, 8992 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 14:22:20,067 INFO L231 Difference]: Finished difference. Result has 441 places, 589 transitions, 7914 flow [2024-06-04 14:22:20,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7752, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7914, PETRI_PLACES=441, PETRI_TRANSITIONS=589} [2024-06-04 14:22:20,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-04 14:22:20,067 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 589 transitions, 7914 flow [2024-06-04 14:22:20,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:22:20,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:22:20,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:22:20,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 14:22:20,068 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:22:20,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:22:20,068 INFO L85 PathProgramCache]: Analyzing trace with hash -115104022, now seen corresponding path program 22 times [2024-06-04 14:22:20,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:22:20,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947674864] [2024-06-04 14:22:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:22:20,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:22:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:22:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:22:20,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:22:20,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947674864] [2024-06-04 14:22:20,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947674864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:22:20,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:22:20,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:22:20,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727779951] [2024-06-04 14:22:20,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:22:20,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:22:20,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:22:20,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:22:20,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:22:20,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:22:20,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 589 transitions, 7914 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:22:20,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:22:20,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:22:20,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:22:21,436 INFO L124 PetriNetUnfolderBase]: 3630/6146 cut-off events. [2024-06-04 14:22:21,437 INFO L125 PetriNetUnfolderBase]: For 808740/808746 co-relation queries the response was YES. [2024-06-04 14:22:21,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45037 conditions, 6146 events. 3630/6146 cut-off events. For 808740/808746 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42678 event pairs, 714 based on Foata normal form. 5/6139 useless extension candidates. Maximal degree in co-relation 44833. Up to 5289 conditions per place. [2024-06-04 14:22:21,533 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 459 selfloop transitions, 143 changer transitions 0/609 dead transitions. [2024-06-04 14:22:21,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 609 transitions, 9408 flow [2024-06-04 14:22:21,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:22:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:22:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 14:22:21,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 14:22:21,535 INFO L175 Difference]: Start difference. First operand has 441 places, 589 transitions, 7914 flow. Second operand 6 states and 150 transitions. [2024-06-04 14:22:21,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 609 transitions, 9408 flow [2024-06-04 14:22:26,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 609 transitions, 9227 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:22:26,155 INFO L231 Difference]: Finished difference. Result has 440 places, 589 transitions, 8030 flow [2024-06-04 14:22:26,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7733, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8030, PETRI_PLACES=440, PETRI_TRANSITIONS=589} [2024-06-04 14:22:26,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-04 14:22:26,168 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 589 transitions, 8030 flow [2024-06-04 14:22:26,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:22:26,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:22:26,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:22:26,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 14:22:26,169 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:22:26,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:22:26,169 INFO L85 PathProgramCache]: Analyzing trace with hash 482905666, now seen corresponding path program 23 times [2024-06-04 14:22:26,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:22:26,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168081461] [2024-06-04 14:22:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:22:26,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:22:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:22:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:22:26,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:22:26,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168081461] [2024-06-04 14:22:26,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168081461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:22:26,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:22:26,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:22:26,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29108132] [2024-06-04 14:22:26,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:22:26,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:22:26,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:22:26,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:22:26,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:22:26,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:22:26,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 589 transitions, 8030 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:22:26,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:22:26,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:22:26,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:22:27,522 INFO L124 PetriNetUnfolderBase]: 3627/6154 cut-off events. [2024-06-04 14:22:27,522 INFO L125 PetriNetUnfolderBase]: For 812524/812530 co-relation queries the response was YES. [2024-06-04 14:22:27,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45193 conditions, 6154 events. 3627/6154 cut-off events. For 812524/812530 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42722 event pairs, 683 based on Foata normal form. 5/6153 useless extension candidates. Maximal degree in co-relation 44988. Up to 5286 conditions per place. [2024-06-04 14:22:27,616 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 458 selfloop transitions, 156 changer transitions 0/621 dead transitions. [2024-06-04 14:22:27,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 621 transitions, 9822 flow [2024-06-04 14:22:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:22:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:22:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 14:22:27,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-04 14:22:27,618 INFO L175 Difference]: Start difference. First operand has 440 places, 589 transitions, 8030 flow. Second operand 8 states and 202 transitions. [2024-06-04 14:22:27,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 621 transitions, 9822 flow [2024-06-04 14:22:32,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 621 transitions, 9441 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-04 14:22:32,623 INFO L231 Difference]: Finished difference. Result has 440 places, 589 transitions, 7980 flow [2024-06-04 14:22:32,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7653, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7980, PETRI_PLACES=440, PETRI_TRANSITIONS=589} [2024-06-04 14:22:32,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-04 14:22:32,623 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 589 transitions, 7980 flow [2024-06-04 14:22:32,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:22:32,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:22:32,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:22:32,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 14:22:32,624 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:22:32,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:22:32,624 INFO L85 PathProgramCache]: Analyzing trace with hash 56670884, now seen corresponding path program 13 times [2024-06-04 14:22:32,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:22:32,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668076134] [2024-06-04 14:22:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:22:32,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:22:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:22:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:22:32,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:22:32,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668076134] [2024-06-04 14:22:32,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668076134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:22:32,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:22:32,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:22:32,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966396818] [2024-06-04 14:22:32,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:22:32,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:22:32,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:22:32,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:22:32,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:22:32,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:22:32,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 589 transitions, 7980 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:22:32,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:22:32,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:22:32,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:22:34,261 INFO L124 PetriNetUnfolderBase]: 3632/6142 cut-off events. [2024-06-04 14:22:34,261 INFO L125 PetriNetUnfolderBase]: For 810896/810896 co-relation queries the response was YES. [2024-06-04 14:22:34,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45229 conditions, 6142 events. 3632/6142 cut-off events. For 810896/810896 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42621 event pairs, 707 based on Foata normal form. 1/6131 useless extension candidates. Maximal degree in co-relation 45024. Up to 5310 conditions per place. [2024-06-04 14:22:34,346 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 164 changer transitions 0/609 dead transitions. [2024-06-04 14:22:34,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 609 transitions, 9755 flow [2024-06-04 14:22:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:22:34,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:22:34,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 14:22:34,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-04 14:22:34,348 INFO L175 Difference]: Start difference. First operand has 440 places, 589 transitions, 7980 flow. Second operand 8 states and 185 transitions. [2024-06-04 14:22:34,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 609 transitions, 9755 flow [2024-06-04 14:22:38,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 609 transitions, 9382 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-04 14:22:38,507 INFO L231 Difference]: Finished difference. Result has 438 places, 592 transitions, 7996 flow [2024-06-04 14:22:38,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7615, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7996, PETRI_PLACES=438, PETRI_TRANSITIONS=592} [2024-06-04 14:22:38,507 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-04 14:22:38,507 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 592 transitions, 7996 flow [2024-06-04 14:22:38,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:22:38,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:22:38,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:22:38,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 14:22:38,508 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:22:38,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:22:38,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1422778648, now seen corresponding path program 24 times [2024-06-04 14:22:38,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:22:38,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009231394] [2024-06-04 14:22:38,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:22:38,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:22:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:22:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:22:38,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:22:38,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009231394] [2024-06-04 14:22:38,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009231394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:22:38,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:22:38,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:22:38,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585997887] [2024-06-04 14:22:38,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:22:38,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:22:38,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:22:38,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:22:38,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:22:38,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:22:38,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 592 transitions, 7996 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:22:38,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:22:38,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:22:38,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:22:40,205 INFO L124 PetriNetUnfolderBase]: 3629/6159 cut-off events. [2024-06-04 14:22:40,206 INFO L125 PetriNetUnfolderBase]: For 792645/792651 co-relation queries the response was YES. [2024-06-04 14:22:40,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44960 conditions, 6159 events. 3629/6159 cut-off events. For 792645/792651 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42796 event pairs, 681 based on Foata normal form. 5/6158 useless extension candidates. Maximal degree in co-relation 44756. Up to 5290 conditions per place. [2024-06-04 14:22:40,293 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 460 selfloop transitions, 163 changer transitions 0/630 dead transitions. [2024-06-04 14:22:40,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 630 transitions, 9578 flow [2024-06-04 14:22:40,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:22:40,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:22:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-04 14:22:40,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-04 14:22:40,295 INFO L175 Difference]: Start difference. First operand has 438 places, 592 transitions, 7996 flow. Second operand 9 states and 224 transitions. [2024-06-04 14:22:40,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 630 transitions, 9578 flow [2024-06-04 14:22:45,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 630 transitions, 9385 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 14:22:45,218 INFO L231 Difference]: Finished difference. Result has 443 places, 592 transitions, 8147 flow [2024-06-04 14:22:45,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7803, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8147, PETRI_PLACES=443, PETRI_TRANSITIONS=592} [2024-06-04 14:22:45,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-04 14:22:45,218 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 592 transitions, 8147 flow [2024-06-04 14:22:45,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:22:45,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:22:45,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:22:45,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 14:22:45,219 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:22:45,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:22:45,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1726855132, now seen corresponding path program 14 times [2024-06-04 14:22:45,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:22:45,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357408115] [2024-06-04 14:22:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:22:45,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:22:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:22:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:22:45,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:22:45,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357408115] [2024-06-04 14:22:45,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357408115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:22:45,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:22:45,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:22:45,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209272877] [2024-06-04 14:22:45,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:22:45,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:22:45,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:22:45,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:22:45,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:22:45,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:22:45,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 592 transitions, 8147 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:22:45,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:22:45,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:22:45,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:22:46,939 INFO L124 PetriNetUnfolderBase]: 3626/6155 cut-off events. [2024-06-04 14:22:46,939 INFO L125 PetriNetUnfolderBase]: For 799926/799932 co-relation queries the response was YES. [2024-06-04 14:22:47,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45022 conditions, 6155 events. 3626/6155 cut-off events. For 799926/799932 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42755 event pairs, 699 based on Foata normal form. 5/6154 useless extension candidates. Maximal degree in co-relation 44816. Up to 5303 conditions per place. [2024-06-04 14:22:47,028 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 441 selfloop transitions, 164 changer transitions 0/612 dead transitions. [2024-06-04 14:22:47,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 612 transitions, 10131 flow [2024-06-04 14:22:47,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:22:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:22:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 14:22:47,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 14:22:47,029 INFO L175 Difference]: Start difference. First operand has 443 places, 592 transitions, 8147 flow. Second operand 7 states and 170 transitions. [2024-06-04 14:22:47,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 612 transitions, 10131 flow [2024-06-04 14:22:51,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 612 transitions, 9769 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-04 14:22:51,853 INFO L231 Difference]: Finished difference. Result has 439 places, 592 transitions, 8141 flow [2024-06-04 14:22:51,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7803, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8141, PETRI_PLACES=439, PETRI_TRANSITIONS=592} [2024-06-04 14:22:51,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-04 14:22:51,853 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 592 transitions, 8141 flow [2024-06-04 14:22:51,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:22:51,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:22:51,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:22:51,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 14:22:51,854 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:22:51,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:22:51,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1977746284, now seen corresponding path program 15 times [2024-06-04 14:22:51,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:22:51,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064724825] [2024-06-04 14:22:51,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:22:51,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:22:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:22:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:22:51,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:22:51,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064724825] [2024-06-04 14:22:51,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064724825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:22:51,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:22:51,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:22:51,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010634062] [2024-06-04 14:22:51,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:22:51,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:22:51,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:22:51,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:22:51,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:22:51,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:22:51,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 592 transitions, 8141 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:22:51,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:22:51,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:22:51,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:22:53,419 INFO L124 PetriNetUnfolderBase]: 3631/6162 cut-off events. [2024-06-04 14:22:53,419 INFO L125 PetriNetUnfolderBase]: For 775950/775956 co-relation queries the response was YES. [2024-06-04 14:22:53,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44832 conditions, 6162 events. 3631/6162 cut-off events. For 775950/775956 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42816 event pairs, 706 based on Foata normal form. 5/6161 useless extension candidates. Maximal degree in co-relation 44628. Up to 5309 conditions per place. [2024-06-04 14:22:53,506 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 440 selfloop transitions, 167 changer transitions 0/614 dead transitions. [2024-06-04 14:22:53,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 614 transitions, 9936 flow [2024-06-04 14:22:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:22:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:22:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 14:22:53,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-04 14:22:53,507 INFO L175 Difference]: Start difference. First operand has 439 places, 592 transitions, 8141 flow. Second operand 7 states and 169 transitions. [2024-06-04 14:22:53,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 614 transitions, 9936 flow [2024-06-04 14:22:57,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 614 transitions, 9436 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-04 14:22:57,754 INFO L231 Difference]: Finished difference. Result has 439 places, 595 transitions, 8048 flow [2024-06-04 14:22:57,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7665, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8048, PETRI_PLACES=439, PETRI_TRANSITIONS=595} [2024-06-04 14:22:57,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-04 14:22:57,754 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 595 transitions, 8048 flow [2024-06-04 14:22:57,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:22:57,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:22:57,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:22:57,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 14:22:57,755 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:22:57,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:22:57,755 INFO L85 PathProgramCache]: Analyzing trace with hash 27061186, now seen corresponding path program 16 times [2024-06-04 14:22:57,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:22:57,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068670370] [2024-06-04 14:22:57,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:22:57,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:22:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:22:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:22:57,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:22:57,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068670370] [2024-06-04 14:22:57,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068670370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:22:57,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:22:57,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:22:57,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031604756] [2024-06-04 14:22:57,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:22:57,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:22:57,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:22:57,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:22:57,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:22:57,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:22:57,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 595 transitions, 8048 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:22:57,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:22:57,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:22:57,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:22:59,311 INFO L124 PetriNetUnfolderBase]: 3628/6155 cut-off events. [2024-06-04 14:22:59,311 INFO L125 PetriNetUnfolderBase]: For 762671/762671 co-relation queries the response was YES. [2024-06-04 14:22:59,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44479 conditions, 6155 events. 3628/6155 cut-off events. For 762671/762671 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42691 event pairs, 654 based on Foata normal form. 1/6153 useless extension candidates. Maximal degree in co-relation 44276. Up to 5433 conditions per place. [2024-06-04 14:22:59,404 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 522 selfloop transitions, 89 changer transitions 0/618 dead transitions. [2024-06-04 14:22:59,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 618 transitions, 9566 flow [2024-06-04 14:22:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:22:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:22:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 14:22:59,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 14:22:59,405 INFO L175 Difference]: Start difference. First operand has 439 places, 595 transitions, 8048 flow. Second operand 6 states and 156 transitions. [2024-06-04 14:22:59,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 618 transitions, 9566 flow [2024-06-04 14:23:03,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 618 transitions, 9325 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 14:23:03,839 INFO L231 Difference]: Finished difference. Result has 440 places, 595 transitions, 8008 flow [2024-06-04 14:23:03,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7809, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8008, PETRI_PLACES=440, PETRI_TRANSITIONS=595} [2024-06-04 14:23:03,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-04 14:23:03,840 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 595 transitions, 8008 flow [2024-06-04 14:23:03,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:23:03,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:23:03,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:23:03,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 14:23:03,841 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:23:03,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:23:03,841 INFO L85 PathProgramCache]: Analyzing trace with hash 26883556, now seen corresponding path program 17 times [2024-06-04 14:23:03,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:23:03,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73585779] [2024-06-04 14:23:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:23:03,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:23:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:23:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:23:03,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:23:03,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73585779] [2024-06-04 14:23:03,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73585779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:23:03,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:23:03,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:23:03,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838416997] [2024-06-04 14:23:03,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:23:03,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:23:03,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:23:03,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:23:03,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:23:04,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:23:04,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 595 transitions, 8008 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:04,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:23:04,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:23:04,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:23:05,472 INFO L124 PetriNetUnfolderBase]: 3625/6151 cut-off events. [2024-06-04 14:23:05,472 INFO L125 PetriNetUnfolderBase]: For 755822/755822 co-relation queries the response was YES. [2024-06-04 14:23:05,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44197 conditions, 6151 events. 3625/6151 cut-off events. For 755822/755822 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42621 event pairs, 654 based on Foata normal form. 1/6149 useless extension candidates. Maximal degree in co-relation 43993. Up to 5430 conditions per place. [2024-06-04 14:23:05,557 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 528 selfloop transitions, 89 changer transitions 0/624 dead transitions. [2024-06-04 14:23:05,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 624 transitions, 9316 flow [2024-06-04 14:23:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:23:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:23:05,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 14:23:05,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-04 14:23:05,558 INFO L175 Difference]: Start difference. First operand has 440 places, 595 transitions, 8008 flow. Second operand 7 states and 181 transitions. [2024-06-04 14:23:05,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 624 transitions, 9316 flow [2024-06-04 14:23:10,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 624 transitions, 9007 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 14:23:10,305 INFO L231 Difference]: Finished difference. Result has 441 places, 595 transitions, 7901 flow [2024-06-04 14:23:10,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7699, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7901, PETRI_PLACES=441, PETRI_TRANSITIONS=595} [2024-06-04 14:23:10,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-04 14:23:10,305 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 595 transitions, 7901 flow [2024-06-04 14:23:10,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:10,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:23:10,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:23:10,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-04 14:23:10,306 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:23:10,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:23:10,306 INFO L85 PathProgramCache]: Analyzing trace with hash 567125032, now seen corresponding path program 18 times [2024-06-04 14:23:10,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:23:10,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469789855] [2024-06-04 14:23:10,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:23:10,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:23:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:23:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:23:10,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:23:10,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469789855] [2024-06-04 14:23:10,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469789855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:23:10,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:23:10,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:23:10,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214913614] [2024-06-04 14:23:10,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:23:10,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:23:10,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:23:10,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:23:10,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:23:10,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:23:10,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 595 transitions, 7901 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:10,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:23:10,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:23:10,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:23:11,995 INFO L124 PetriNetUnfolderBase]: 3622/6149 cut-off events. [2024-06-04 14:23:11,995 INFO L125 PetriNetUnfolderBase]: For 751362/751368 co-relation queries the response was YES. [2024-06-04 14:23:12,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44026 conditions, 6149 events. 3622/6149 cut-off events. For 751362/751368 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42713 event pairs, 690 based on Foata normal form. 5/6149 useless extension candidates. Maximal degree in co-relation 43821. Up to 5300 conditions per place. [2024-06-04 14:23:12,081 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 444 selfloop transitions, 172 changer transitions 0/623 dead transitions. [2024-06-04 14:23:12,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 623 transitions, 9679 flow [2024-06-04 14:23:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:23:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:23:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 14:23:12,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-04 14:23:12,082 INFO L175 Difference]: Start difference. First operand has 441 places, 595 transitions, 7901 flow. Second operand 7 states and 179 transitions. [2024-06-04 14:23:12,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 623 transitions, 9679 flow [2024-06-04 14:23:16,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 623 transitions, 9471 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 14:23:16,637 INFO L231 Difference]: Finished difference. Result has 442 places, 595 transitions, 8059 flow [2024-06-04 14:23:16,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7697, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8059, PETRI_PLACES=442, PETRI_TRANSITIONS=595} [2024-06-04 14:23:16,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-04 14:23:16,638 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 595 transitions, 8059 flow [2024-06-04 14:23:16,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:16,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:23:16,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:23:16,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-04 14:23:16,638 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:23:16,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:23:16,639 INFO L85 PathProgramCache]: Analyzing trace with hash -168853478, now seen corresponding path program 19 times [2024-06-04 14:23:16,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:23:16,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556156894] [2024-06-04 14:23:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:23:16,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:23:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:23:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:23:16,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:23:16,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556156894] [2024-06-04 14:23:16,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556156894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:23:16,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:23:16,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:23:16,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336185152] [2024-06-04 14:23:16,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:23:16,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:23:16,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:23:16,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:23:16,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:23:16,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:23:16,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 595 transitions, 8059 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:16,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:23:16,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:23:16,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:23:18,081 INFO L124 PetriNetUnfolderBase]: 3619/6125 cut-off events. [2024-06-04 14:23:18,081 INFO L125 PetriNetUnfolderBase]: For 745629/745629 co-relation queries the response was YES. [2024-06-04 14:23:18,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44035 conditions, 6125 events. 3619/6125 cut-off events. For 745629/745629 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42463 event pairs, 705 based on Foata normal form. 1/6114 useless extension candidates. Maximal degree in co-relation 43830. Up to 5297 conditions per place. [2024-06-04 14:23:18,164 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 432 selfloop transitions, 171 changer transitions 0/610 dead transitions. [2024-06-04 14:23:18,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 610 transitions, 9539 flow [2024-06-04 14:23:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:23:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:23:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 14:23:18,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-04 14:23:18,166 INFO L175 Difference]: Start difference. First operand has 442 places, 595 transitions, 8059 flow. Second operand 7 states and 164 transitions. [2024-06-04 14:23:18,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 610 transitions, 9539 flow [2024-06-04 14:23:22,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 610 transitions, 9159 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 14:23:22,604 INFO L231 Difference]: Finished difference. Result has 440 places, 595 transitions, 8037 flow [2024-06-04 14:23:22,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7685, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8037, PETRI_PLACES=440, PETRI_TRANSITIONS=595} [2024-06-04 14:23:22,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-04 14:23:22,605 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 595 transitions, 8037 flow [2024-06-04 14:23:22,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:22,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:23:22,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:23:22,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-04 14:23:22,605 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:23:22,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:23:22,606 INFO L85 PathProgramCache]: Analyzing trace with hash 567124846, now seen corresponding path program 25 times [2024-06-04 14:23:22,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:23:22,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47537886] [2024-06-04 14:23:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:23:22,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:23:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:23:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:23:22,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:23:22,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47537886] [2024-06-04 14:23:22,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47537886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:23:22,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:23:22,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:23:22,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309590000] [2024-06-04 14:23:22,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:23:22,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:23:22,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:23:22,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:23:22,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:23:22,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:23:22,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 595 transitions, 8037 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:22,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:23:22,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:23:22,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:23:24,225 INFO L124 PetriNetUnfolderBase]: 3616/6141 cut-off events. [2024-06-04 14:23:24,226 INFO L125 PetriNetUnfolderBase]: For 714150/714156 co-relation queries the response was YES. [2024-06-04 14:23:24,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43668 conditions, 6141 events. 3616/6141 cut-off events. For 714150/714156 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42627 event pairs, 673 based on Foata normal form. 5/6141 useless extension candidates. Maximal degree in co-relation 43465. Up to 5274 conditions per place. [2024-06-04 14:23:24,308 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 163 changer transitions 0/636 dead transitions. [2024-06-04 14:23:24,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 636 transitions, 9399 flow [2024-06-04 14:23:24,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:23:24,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:23:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-04 14:23:24,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 14:23:24,309 INFO L175 Difference]: Start difference. First operand has 440 places, 595 transitions, 8037 flow. Second operand 10 states and 245 transitions. [2024-06-04 14:23:24,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 636 transitions, 9399 flow [2024-06-04 14:23:28,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 636 transitions, 8948 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 14:23:28,701 INFO L231 Difference]: Finished difference. Result has 442 places, 595 transitions, 7934 flow [2024-06-04 14:23:28,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7586, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7934, PETRI_PLACES=442, PETRI_TRANSITIONS=595} [2024-06-04 14:23:28,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-04 14:23:28,701 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 595 transitions, 7934 flow [2024-06-04 14:23:28,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:28,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:23:28,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:23:28,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-04 14:23:28,702 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:23:28,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:23:28,702 INFO L85 PathProgramCache]: Analyzing trace with hash 567131542, now seen corresponding path program 20 times [2024-06-04 14:23:28,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:23:28,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925205439] [2024-06-04 14:23:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:23:28,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:23:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:23:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:23:28,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:23:28,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925205439] [2024-06-04 14:23:28,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925205439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:23:28,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:23:28,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:23:28,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226457403] [2024-06-04 14:23:28,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:23:28,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:23:28,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:23:28,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:23:28,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:23:28,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:23:28,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 595 transitions, 7934 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:28,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:23:28,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:23:28,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:23:30,204 INFO L124 PetriNetUnfolderBase]: 3613/6138 cut-off events. [2024-06-04 14:23:30,204 INFO L125 PetriNetUnfolderBase]: For 708087/708093 co-relation queries the response was YES. [2024-06-04 14:23:30,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43518 conditions, 6138 events. 3613/6138 cut-off events. For 708087/708093 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42657 event pairs, 705 based on Foata normal form. 5/6137 useless extension candidates. Maximal degree in co-relation 43315. Up to 5290 conditions per place. [2024-06-04 14:23:30,286 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 440 selfloop transitions, 171 changer transitions 0/618 dead transitions. [2024-06-04 14:23:30,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 618 transitions, 9214 flow [2024-06-04 14:23:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:23:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:23:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 14:23:30,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 14:23:30,287 INFO L175 Difference]: Start difference. First operand has 442 places, 595 transitions, 7934 flow. Second operand 7 states and 173 transitions. [2024-06-04 14:23:30,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 618 transitions, 9214 flow [2024-06-04 14:23:34,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 618 transitions, 8870 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-04 14:23:34,285 INFO L231 Difference]: Finished difference. Result has 439 places, 595 transitions, 7946 flow [2024-06-04 14:23:34,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7590, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7946, PETRI_PLACES=439, PETRI_TRANSITIONS=595} [2024-06-04 14:23:34,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-04 14:23:34,286 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 595 transitions, 7946 flow [2024-06-04 14:23:34,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:34,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:23:34,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:23:34,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-04 14:23:34,286 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:23:34,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:23:34,287 INFO L85 PathProgramCache]: Analyzing trace with hash 22296610, now seen corresponding path program 7 times [2024-06-04 14:23:34,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:23:34,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80721412] [2024-06-04 14:23:34,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:23:34,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:23:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:23:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:23:34,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:23:34,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80721412] [2024-06-04 14:23:34,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80721412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:23:34,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:23:34,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:23:34,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703363412] [2024-06-04 14:23:34,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:23:34,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:23:34,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:23:34,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:23:34,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:23:34,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:23:34,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 595 transitions, 7946 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:34,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:23:34,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:23:34,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:23:35,781 INFO L124 PetriNetUnfolderBase]: 3669/6227 cut-off events. [2024-06-04 14:23:35,781 INFO L125 PetriNetUnfolderBase]: For 771377/771377 co-relation queries the response was YES. [2024-06-04 14:23:35,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43925 conditions, 6227 events. 3669/6227 cut-off events. For 771377/771377 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 43218 event pairs, 536 based on Foata normal form. 16/6240 useless extension candidates. Maximal degree in co-relation 43722. Up to 5338 conditions per place. [2024-06-04 14:23:35,868 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 518 selfloop transitions, 105 changer transitions 0/630 dead transitions. [2024-06-04 14:23:35,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 630 transitions, 9352 flow [2024-06-04 14:23:35,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:23:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:23:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-04 14:23:35,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-04 14:23:35,869 INFO L175 Difference]: Start difference. First operand has 439 places, 595 transitions, 7946 flow. Second operand 7 states and 184 transitions. [2024-06-04 14:23:35,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 630 transitions, 9352 flow [2024-06-04 14:23:39,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 630 transitions, 8835 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 14:23:39,978 INFO L231 Difference]: Finished difference. Result has 436 places, 597 transitions, 7729 flow [2024-06-04 14:23:39,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7429, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7729, PETRI_PLACES=436, PETRI_TRANSITIONS=597} [2024-06-04 14:23:39,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-04 14:23:39,979 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 597 transitions, 7729 flow [2024-06-04 14:23:39,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:39,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:23:39,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:23:39,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-04 14:23:39,980 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:23:39,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:23:39,980 INFO L85 PathProgramCache]: Analyzing trace with hash 938257156, now seen corresponding path program 8 times [2024-06-04 14:23:39,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:23:39,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764745880] [2024-06-04 14:23:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:23:39,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:23:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:23:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:23:40,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:23:40,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764745880] [2024-06-04 14:23:40,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764745880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:23:40,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:23:40,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:23:40,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489755145] [2024-06-04 14:23:40,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:23:40,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:23:40,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:23:40,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:23:40,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:23:40,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:23:40,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 597 transitions, 7729 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:40,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:23:40,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:23:40,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:23:41,612 INFO L124 PetriNetUnfolderBase]: 3725/6314 cut-off events. [2024-06-04 14:23:41,612 INFO L125 PetriNetUnfolderBase]: For 766182/766188 co-relation queries the response was YES. [2024-06-04 14:23:41,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44577 conditions, 6314 events. 3725/6314 cut-off events. For 766182/766188 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 43976 event pairs, 724 based on Foata normal form. 20/6328 useless extension candidates. Maximal degree in co-relation 44376. Up to 5338 conditions per place. [2024-06-04 14:23:41,698 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 442 selfloop transitions, 171 changer transitions 0/620 dead transitions. [2024-06-04 14:23:41,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 620 transitions, 9087 flow [2024-06-04 14:23:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:23:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:23:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 14:23:41,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 14:23:41,699 INFO L175 Difference]: Start difference. First operand has 436 places, 597 transitions, 7729 flow. Second operand 7 states and 170 transitions. [2024-06-04 14:23:41,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 620 transitions, 9087 flow [2024-06-04 14:23:45,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 620 transitions, 8867 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 14:23:45,766 INFO L231 Difference]: Finished difference. Result has 438 places, 599 transitions, 7931 flow [2024-06-04 14:23:45,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7931, PETRI_PLACES=438, PETRI_TRANSITIONS=599} [2024-06-04 14:23:45,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-04 14:23:45,766 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 599 transitions, 7931 flow [2024-06-04 14:23:45,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:45,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:23:45,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:23:45,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-04 14:23:45,767 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:23:45,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:23:45,784 INFO L85 PathProgramCache]: Analyzing trace with hash 567359206, now seen corresponding path program 9 times [2024-06-04 14:23:45,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:23:45,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59632382] [2024-06-04 14:23:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:23:45,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:23:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:23:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:23:45,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:23:45,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59632382] [2024-06-04 14:23:45,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59632382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:23:45,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:23:45,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:23:45,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874878930] [2024-06-04 14:23:45,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:23:45,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:23:45,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:23:45,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:23:45,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:23:45,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:23:45,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 599 transitions, 7931 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:45,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:23:45,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:23:45,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:23:47,386 INFO L124 PetriNetUnfolderBase]: 3768/6387 cut-off events. [2024-06-04 14:23:47,387 INFO L125 PetriNetUnfolderBase]: For 767372/767378 co-relation queries the response was YES. [2024-06-04 14:23:47,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45058 conditions, 6387 events. 3768/6387 cut-off events. For 767372/767378 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 44545 event pairs, 733 based on Foata normal form. 20/6401 useless extension candidates. Maximal degree in co-relation 44856. Up to 5343 conditions per place. [2024-06-04 14:23:47,473 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 444 selfloop transitions, 177 changer transitions 0/628 dead transitions. [2024-06-04 14:23:47,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 628 transitions, 9325 flow [2024-06-04 14:23:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:23:47,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:23:47,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 14:23:47,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 14:23:47,474 INFO L175 Difference]: Start difference. First operand has 438 places, 599 transitions, 7931 flow. Second operand 7 states and 176 transitions. [2024-06-04 14:23:47,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 628 transitions, 9325 flow [2024-06-04 14:23:51,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 628 transitions, 8939 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 14:23:51,218 INFO L231 Difference]: Finished difference. Result has 440 places, 601 transitions, 7987 flow [2024-06-04 14:23:51,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7549, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7987, PETRI_PLACES=440, PETRI_TRANSITIONS=601} [2024-06-04 14:23:51,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-04 14:23:51,218 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 601 transitions, 7987 flow [2024-06-04 14:23:51,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:51,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:23:51,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:23:51,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-04 14:23:51,219 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:23:51,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:23:51,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1350866176, now seen corresponding path program 10 times [2024-06-04 14:23:51,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:23:51,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345400421] [2024-06-04 14:23:51,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:23:51,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:23:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:23:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:23:51,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:23:51,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345400421] [2024-06-04 14:23:51,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345400421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:23:51,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:23:51,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:23:51,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150709532] [2024-06-04 14:23:51,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:23:51,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:23:51,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:23:51,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:23:51,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:23:51,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:23:51,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 601 transitions, 7987 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:51,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:23:51,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:23:51,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:23:52,848 INFO L124 PetriNetUnfolderBase]: 3775/6404 cut-off events. [2024-06-04 14:23:52,848 INFO L125 PetriNetUnfolderBase]: For 699801/699807 co-relation queries the response was YES. [2024-06-04 14:23:52,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44300 conditions, 6404 events. 3775/6404 cut-off events. For 699801/699807 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 44684 event pairs, 602 based on Foata normal form. 16/6414 useless extension candidates. Maximal degree in co-relation 44097. Up to 4818 conditions per place. [2024-06-04 14:23:52,936 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 426 selfloop transitions, 203 changer transitions 0/636 dead transitions. [2024-06-04 14:23:52,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 636 transitions, 9613 flow [2024-06-04 14:23:52,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:23:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:23:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 14:23:52,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-04 14:23:52,937 INFO L175 Difference]: Start difference. First operand has 440 places, 601 transitions, 7987 flow. Second operand 7 states and 183 transitions. [2024-06-04 14:23:52,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 636 transitions, 9613 flow [2024-06-04 14:23:57,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 636 transitions, 9215 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 14:23:57,038 INFO L231 Difference]: Finished difference. Result has 441 places, 602 transitions, 8047 flow [2024-06-04 14:23:57,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7595, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8047, PETRI_PLACES=441, PETRI_TRANSITIONS=602} [2024-06-04 14:23:57,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-04 14:23:57,038 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 602 transitions, 8047 flow [2024-06-04 14:23:57,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:57,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:23:57,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:23:57,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-04 14:23:57,039 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:23:57,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:23:57,039 INFO L85 PathProgramCache]: Analyzing trace with hash 874776472, now seen corresponding path program 2 times [2024-06-04 14:23:57,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:23:57,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489126848] [2024-06-04 14:23:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:23:57,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:23:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:23:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:23:57,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:23:57,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489126848] [2024-06-04 14:23:57,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489126848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:23:57,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:23:57,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:23:57,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899901731] [2024-06-04 14:23:57,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:23:57,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:23:57,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:23:57,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:23:57,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:23:57,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:23:57,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 602 transitions, 8047 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:23:57,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:23:57,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:23:57,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:23:58,650 INFO L124 PetriNetUnfolderBase]: 3815/6471 cut-off events. [2024-06-04 14:23:58,651 INFO L125 PetriNetUnfolderBase]: For 686899/686899 co-relation queries the response was YES. [2024-06-04 14:23:58,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44724 conditions, 6471 events. 3815/6471 cut-off events. For 686899/686899 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 45202 event pairs, 544 based on Foata normal form. 12/6480 useless extension candidates. Maximal degree in co-relation 44521. Up to 5512 conditions per place. [2024-06-04 14:23:58,743 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 522 selfloop transitions, 105 changer transitions 0/634 dead transitions. [2024-06-04 14:23:58,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 634 transitions, 9455 flow [2024-06-04 14:23:58,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:23:58,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:23:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 14:23:58,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-04 14:23:58,744 INFO L175 Difference]: Start difference. First operand has 441 places, 602 transitions, 8047 flow. Second operand 7 states and 179 transitions. [2024-06-04 14:23:58,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 634 transitions, 9455 flow [2024-06-04 14:24:02,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 634 transitions, 9058 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 14:24:02,931 INFO L231 Difference]: Finished difference. Result has 442 places, 604 transitions, 7927 flow [2024-06-04 14:24:02,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7650, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7927, PETRI_PLACES=442, PETRI_TRANSITIONS=604} [2024-06-04 14:24:02,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-04 14:24:02,932 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 604 transitions, 7927 flow [2024-06-04 14:24:02,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:24:02,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:24:02,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:24:02,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-04 14:24:02,933 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:24:02,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:24:02,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1793611426, now seen corresponding path program 3 times [2024-06-04 14:24:02,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:24:02,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597238596] [2024-06-04 14:24:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:24:02,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:24:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:24:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:24:03,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:24:03,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597238596] [2024-06-04 14:24:03,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597238596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:24:03,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:24:03,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:24:03,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360105810] [2024-06-04 14:24:03,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:24:03,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:24:03,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:24:03,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:24:03,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:24:03,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:24:03,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 604 transitions, 7927 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:24:03,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:24:03,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:24:03,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:24:04,516 INFO L124 PetriNetUnfolderBase]: 3901/6619 cut-off events. [2024-06-04 14:24:04,516 INFO L125 PetriNetUnfolderBase]: For 729069/729069 co-relation queries the response was YES. [2024-06-04 14:24:04,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46079 conditions, 6619 events. 3901/6619 cut-off events. For 729069/729069 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 46429 event pairs, 514 based on Foata normal form. 12/6628 useless extension candidates. Maximal degree in co-relation 45877. Up to 5325 conditions per place. [2024-06-04 14:24:04,607 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 526 selfloop transitions, 103 changer transitions 0/636 dead transitions. [2024-06-04 14:24:04,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 636 transitions, 9597 flow [2024-06-04 14:24:04,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:24:04,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:24:04,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 14:24:04,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 14:24:04,608 INFO L175 Difference]: Start difference. First operand has 442 places, 604 transitions, 7927 flow. Second operand 7 states and 176 transitions. [2024-06-04 14:24:04,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 636 transitions, 9597 flow [2024-06-04 14:24:08,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 636 transitions, 9342 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 14:24:08,755 INFO L231 Difference]: Finished difference. Result has 444 places, 607 transitions, 7983 flow [2024-06-04 14:24:08,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7672, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7983, PETRI_PLACES=444, PETRI_TRANSITIONS=607} [2024-06-04 14:24:08,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-04 14:24:08,756 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 607 transitions, 7983 flow [2024-06-04 14:24:08,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:24:08,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:24:08,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:24:08,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-04 14:24:08,756 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:24:08,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:24:08,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1735434940, now seen corresponding path program 4 times [2024-06-04 14:24:08,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:24:08,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182336443] [2024-06-04 14:24:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:24:08,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:24:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:24:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:24:08,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:24:08,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182336443] [2024-06-04 14:24:08,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182336443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:24:08,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:24:08,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:24:08,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607098986] [2024-06-04 14:24:08,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:24:08,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:24:08,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:24:08,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:24:08,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:24:08,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:24:08,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 607 transitions, 7983 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:24:08,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:24:08,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:24:08,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:24:10,345 INFO L124 PetriNetUnfolderBase]: 3908/6635 cut-off events. [2024-06-04 14:24:10,345 INFO L125 PetriNetUnfolderBase]: For 705321/705327 co-relation queries the response was YES. [2024-06-04 14:24:10,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45491 conditions, 6635 events. 3908/6635 cut-off events. For 705321/705327 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 46588 event pairs, 751 based on Foata normal form. 16/6645 useless extension candidates. Maximal degree in co-relation 45288. Up to 5319 conditions per place. [2024-06-04 14:24:10,441 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 440 selfloop transitions, 185 changer transitions 0/632 dead transitions. [2024-06-04 14:24:10,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 632 transitions, 9349 flow [2024-06-04 14:24:10,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:24:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:24:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 14:24:10,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-04 14:24:10,442 INFO L175 Difference]: Start difference. First operand has 444 places, 607 transitions, 7983 flow. Second operand 7 states and 172 transitions. [2024-06-04 14:24:10,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 632 transitions, 9349 flow [2024-06-04 14:24:14,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 632 transitions, 9212 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-04 14:24:14,553 INFO L231 Difference]: Finished difference. Result has 448 places, 608 transitions, 8262 flow [2024-06-04 14:24:14,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7846, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8262, PETRI_PLACES=448, PETRI_TRANSITIONS=608} [2024-06-04 14:24:14,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-04 14:24:14,561 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 608 transitions, 8262 flow [2024-06-04 14:24:14,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:24:14,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:24:14,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:24:14,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-04 14:24:14,562 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:24:14,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:24:14,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2064802542, now seen corresponding path program 1 times [2024-06-04 14:24:14,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:24:14,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40920824] [2024-06-04 14:24:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:24:14,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:24:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:24:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:24:14,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:24:14,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40920824] [2024-06-04 14:24:14,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40920824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:24:14,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:24:14,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:24:14,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979505147] [2024-06-04 14:24:14,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:24:14,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:24:14,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:24:14,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:24:14,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:24:14,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:24:14,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 608 transitions, 8262 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:24:14,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:24:14,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:24:14,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:24:16,127 INFO L124 PetriNetUnfolderBase]: 3942/6681 cut-off events. [2024-06-04 14:24:16,127 INFO L125 PetriNetUnfolderBase]: For 678478/678484 co-relation queries the response was YES. [2024-06-04 14:24:16,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46943 conditions, 6681 events. 3942/6681 cut-off events. For 678478/678484 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 46844 event pairs, 739 based on Foata normal form. 2/6676 useless extension candidates. Maximal degree in co-relation 46738. Up to 5916 conditions per place. [2024-06-04 14:24:16,432 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 551 selfloop transitions, 82 changer transitions 0/640 dead transitions. [2024-06-04 14:24:16,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 640 transitions, 9988 flow [2024-06-04 14:24:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:24:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:24:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 14:24:16,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 14:24:16,433 INFO L175 Difference]: Start difference. First operand has 448 places, 608 transitions, 8262 flow. Second operand 7 states and 171 transitions. [2024-06-04 14:24:16,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 640 transitions, 9988 flow [2024-06-04 14:24:20,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 640 transitions, 9572 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 14:24:20,796 INFO L231 Difference]: Finished difference. Result has 451 places, 614 transitions, 8202 flow [2024-06-04 14:24:20,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7846, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8202, PETRI_PLACES=451, PETRI_TRANSITIONS=614} [2024-06-04 14:24:20,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-04 14:24:20,797 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 614 transitions, 8202 flow [2024-06-04 14:24:20,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:24:20,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:24:20,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:24:20,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-04 14:24:20,797 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:24:20,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:24:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1050519324, now seen corresponding path program 2 times [2024-06-04 14:24:20,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:24:20,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800392178] [2024-06-04 14:24:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:24:20,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:24:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:24:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:24:20,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:24:20,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800392178] [2024-06-04 14:24:20,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800392178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:24:20,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:24:20,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:24:20,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397369746] [2024-06-04 14:24:20,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:24:20,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:24:20,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:24:20,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:24:20,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:24:20,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:24:20,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 614 transitions, 8202 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:24:20,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:24:20,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:24:20,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:24:22,482 INFO L124 PetriNetUnfolderBase]: 3976/6729 cut-off events. [2024-06-04 14:24:22,483 INFO L125 PetriNetUnfolderBase]: For 715967/715973 co-relation queries the response was YES. [2024-06-04 14:24:22,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47487 conditions, 6729 events. 3976/6729 cut-off events. For 715967/715973 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 47286 event pairs, 742 based on Foata normal form. 6/6725 useless extension candidates. Maximal degree in co-relation 47280. Up to 5966 conditions per place. [2024-06-04 14:24:22,582 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 558 selfloop transitions, 78 changer transitions 0/643 dead transitions. [2024-06-04 14:24:22,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 643 transitions, 9940 flow [2024-06-04 14:24:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:24:22,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:24:22,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 14:24:22,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-04 14:24:22,583 INFO L175 Difference]: Start difference. First operand has 451 places, 614 transitions, 8202 flow. Second operand 7 states and 166 transitions. [2024-06-04 14:24:22,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 643 transitions, 9940 flow [2024-06-04 14:24:27,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 643 transitions, 9740 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-04 14:24:27,334 INFO L231 Difference]: Finished difference. Result has 456 places, 620 transitions, 8366 flow [2024-06-04 14:24:27,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8006, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8366, PETRI_PLACES=456, PETRI_TRANSITIONS=620} [2024-06-04 14:24:27,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-04 14:24:27,334 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 620 transitions, 8366 flow [2024-06-04 14:24:27,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:24:27,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:24:27,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:24:27,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-04 14:24:27,335 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:24:27,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:24:27,336 INFO L85 PathProgramCache]: Analyzing trace with hash 692638300, now seen corresponding path program 3 times [2024-06-04 14:24:27,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:24:27,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974114252] [2024-06-04 14:24:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:24:27,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:24:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:24:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:24:27,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:24:27,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974114252] [2024-06-04 14:24:27,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974114252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:24:27,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:24:27,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:24:27,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207021032] [2024-06-04 14:24:27,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:24:27,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:24:27,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:24:27,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:24:27,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:24:27,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:24:27,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 620 transitions, 8366 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:24:27,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:24:27,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:24:27,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:24:29,022 INFO L124 PetriNetUnfolderBase]: 3984/6748 cut-off events. [2024-06-04 14:24:29,022 INFO L125 PetriNetUnfolderBase]: For 705407/705413 co-relation queries the response was YES. [2024-06-04 14:24:29,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47671 conditions, 6748 events. 3984/6748 cut-off events. For 705407/705413 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 47470 event pairs, 751 based on Foata normal form. 6/6746 useless extension candidates. Maximal degree in co-relation 47461. Up to 6020 conditions per place. [2024-06-04 14:24:29,124 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 560 selfloop transitions, 73 changer transitions 0/640 dead transitions. [2024-06-04 14:24:29,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 640 transitions, 9746 flow [2024-06-04 14:24:29,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:24:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:24:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-04 14:24:29,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 14:24:29,125 INFO L175 Difference]: Start difference. First operand has 456 places, 620 transitions, 8366 flow. Second operand 7 states and 161 transitions. [2024-06-04 14:24:29,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 640 transitions, 9746 flow [2024-06-04 14:24:33,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 640 transitions, 9518 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-04 14:24:33,684 INFO L231 Difference]: Finished difference. Result has 460 places, 622 transitions, 8363 flow [2024-06-04 14:24:33,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8170, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8363, PETRI_PLACES=460, PETRI_TRANSITIONS=622} [2024-06-04 14:24:33,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-04 14:24:33,685 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 622 transitions, 8363 flow [2024-06-04 14:24:33,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:24:33,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:24:33,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:24:33,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-04 14:24:33,685 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:24:33,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:24:33,686 INFO L85 PathProgramCache]: Analyzing trace with hash 734874124, now seen corresponding path program 4 times [2024-06-04 14:24:33,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:24:33,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115922730] [2024-06-04 14:24:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:24:33,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:24:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:24:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:24:33,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:24:33,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115922730] [2024-06-04 14:24:33,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115922730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:24:33,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:24:33,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:24:33,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103483850] [2024-06-04 14:24:33,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:24:33,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:24:33,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:24:33,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:24:33,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:24:33,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:24:33,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 622 transitions, 8363 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:24:33,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:24:33,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:24:33,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:24:35,490 INFO L124 PetriNetUnfolderBase]: 3992/6764 cut-off events. [2024-06-04 14:24:35,490 INFO L125 PetriNetUnfolderBase]: For 713499/713505 co-relation queries the response was YES. [2024-06-04 14:24:35,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47729 conditions, 6764 events. 3992/6764 cut-off events. For 713499/713505 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 47551 event pairs, 750 based on Foata normal form. 2/6759 useless extension candidates. Maximal degree in co-relation 47517. Up to 6032 conditions per place. [2024-06-04 14:24:35,591 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 561 selfloop transitions, 77 changer transitions 0/645 dead transitions. [2024-06-04 14:24:35,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 645 transitions, 9729 flow [2024-06-04 14:24:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:24:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:24:35,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 14:24:35,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-04 14:24:35,596 INFO L175 Difference]: Start difference. First operand has 460 places, 622 transitions, 8363 flow. Second operand 7 states and 166 transitions. [2024-06-04 14:24:35,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 645 transitions, 9729 flow [2024-06-04 14:24:41,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 645 transitions, 9558 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 14:24:41,112 INFO L231 Difference]: Finished difference. Result has 462 places, 624 transitions, 8393 flow [2024-06-04 14:24:41,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8192, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8393, PETRI_PLACES=462, PETRI_TRANSITIONS=624} [2024-06-04 14:24:41,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-04 14:24:41,126 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 624 transitions, 8393 flow [2024-06-04 14:24:41,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:24:41,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:24:41,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:24:41,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-04 14:24:41,127 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:24:41,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:24:41,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1768099474, now seen corresponding path program 5 times [2024-06-04 14:24:41,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:24:41,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376246827] [2024-06-04 14:24:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:24:41,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:24:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:24:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:24:41,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:24:41,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376246827] [2024-06-04 14:24:41,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376246827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:24:41,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:24:41,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:24:41,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237805222] [2024-06-04 14:24:41,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:24:41,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:24:41,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:24:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:24:41,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:24:41,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:24:41,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 624 transitions, 8393 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:24:41,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:24:41,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:24:41,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:24:42,942 INFO L124 PetriNetUnfolderBase]: 4000/6778 cut-off events. [2024-06-04 14:24:42,942 INFO L125 PetriNetUnfolderBase]: For 725039/725045 co-relation queries the response was YES. [2024-06-04 14:24:43,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47907 conditions, 6778 events. 4000/6778 cut-off events. For 725039/725045 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 47712 event pairs, 735 based on Foata normal form. 6/6779 useless extension candidates. Maximal degree in co-relation 47694. Up to 6122 conditions per place. [2024-06-04 14:24:43,041 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 599 selfloop transitions, 38 changer transitions 0/644 dead transitions. [2024-06-04 14:24:43,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 644 transitions, 9753 flow [2024-06-04 14:24:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:24:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:24:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-04 14:24:43,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 14:24:43,042 INFO L175 Difference]: Start difference. First operand has 462 places, 624 transitions, 8393 flow. Second operand 7 states and 161 transitions. [2024-06-04 14:24:43,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 644 transitions, 9753 flow [2024-06-04 14:24:47,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 644 transitions, 9574 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 14:24:47,523 INFO L231 Difference]: Finished difference. Result has 464 places, 626 transitions, 8341 flow [2024-06-04 14:24:47,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8214, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8341, PETRI_PLACES=464, PETRI_TRANSITIONS=626} [2024-06-04 14:24:47,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-04 14:24:47,524 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 626 transitions, 8341 flow [2024-06-04 14:24:47,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:24:47,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:24:47,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:24:47,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-04 14:24:47,525 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:24:47,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:24:47,525 INFO L85 PathProgramCache]: Analyzing trace with hash 359467242, now seen corresponding path program 6 times [2024-06-04 14:24:47,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:24:47,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017478453] [2024-06-04 14:24:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:24:47,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:24:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:24:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:24:47,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:24:47,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017478453] [2024-06-04 14:24:47,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017478453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:24:47,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:24:47,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:24:47,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409022573] [2024-06-04 14:24:47,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:24:47,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:24:47,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:24:47,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:24:47,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:24:47,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:24:47,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 626 transitions, 8341 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:24:47,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:24:47,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:24:47,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:24:49,229 INFO L124 PetriNetUnfolderBase]: 4008/6806 cut-off events. [2024-06-04 14:24:49,229 INFO L125 PetriNetUnfolderBase]: For 738372/738378 co-relation queries the response was YES. [2024-06-04 14:24:49,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48037 conditions, 6806 events. 4008/6806 cut-off events. For 738372/738378 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 47927 event pairs, 629 based on Foata normal form. 6/6804 useless extension candidates. Maximal degree in co-relation 47823. Up to 5799 conditions per place. [2024-06-04 14:24:49,327 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 539 selfloop transitions, 110 changer transitions 0/656 dead transitions. [2024-06-04 14:24:49,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 656 transitions, 10342 flow [2024-06-04 14:24:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:24:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:24:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 14:24:49,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 14:24:49,329 INFO L175 Difference]: Start difference. First operand has 464 places, 626 transitions, 8341 flow. Second operand 7 states and 168 transitions. [2024-06-04 14:24:49,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 656 transitions, 10342 flow [2024-06-04 14:24:53,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 656 transitions, 10253 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 14:24:53,901 INFO L231 Difference]: Finished difference. Result has 468 places, 631 transitions, 8669 flow [2024-06-04 14:24:53,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8252, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8669, PETRI_PLACES=468, PETRI_TRANSITIONS=631} [2024-06-04 14:24:53,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-04 14:24:53,901 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 631 transitions, 8669 flow [2024-06-04 14:24:53,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:24:53,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:24:53,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:24:53,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-04 14:24:53,902 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:24:53,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:24:53,902 INFO L85 PathProgramCache]: Analyzing trace with hash 371847402, now seen corresponding path program 7 times [2024-06-04 14:24:53,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:24:53,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356710048] [2024-06-04 14:24:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:24:53,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:24:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:24:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:24:53,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:24:53,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356710048] [2024-06-04 14:24:53,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356710048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:24:53,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:24:53,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:24:53,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504245115] [2024-06-04 14:24:53,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:24:53,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:24:53,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:24:53,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:24:54,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:24:54,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:24:54,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 631 transitions, 8669 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:24:54,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:24:54,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:24:54,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:24:55,634 INFO L124 PetriNetUnfolderBase]: 4016/6817 cut-off events. [2024-06-04 14:24:55,634 INFO L125 PetriNetUnfolderBase]: For 753399/753405 co-relation queries the response was YES. [2024-06-04 14:24:55,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48703 conditions, 6817 events. 4016/6817 cut-off events. For 753399/753405 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 48001 event pairs, 632 based on Foata normal form. 6/6815 useless extension candidates. Maximal degree in co-relation 48487. Up to 5807 conditions per place. [2024-06-04 14:24:55,923 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 536 selfloop transitions, 111 changer transitions 0/654 dead transitions. [2024-06-04 14:24:55,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 654 transitions, 10323 flow [2024-06-04 14:24:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:24:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:24:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 14:24:55,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-04 14:24:55,925 INFO L175 Difference]: Start difference. First operand has 468 places, 631 transitions, 8669 flow. Second operand 7 states and 164 transitions. [2024-06-04 14:24:55,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 654 transitions, 10323 flow [2024-06-04 14:25:00,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 654 transitions, 9902 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:00,704 INFO L231 Difference]: Finished difference. Result has 470 places, 633 transitions, 8549 flow [2024-06-04 14:25:00,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8284, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8549, PETRI_PLACES=470, PETRI_TRANSITIONS=633} [2024-06-04 14:25:00,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-04 14:25:00,705 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 633 transitions, 8549 flow [2024-06-04 14:25:00,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:25:00,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:00,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:00,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-04 14:25:00,705 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:00,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1187104534, now seen corresponding path program 8 times [2024-06-04 14:25:00,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:00,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453691464] [2024-06-04 14:25:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:00,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:00,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:00,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453691464] [2024-06-04 14:25:00,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453691464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:00,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:00,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:00,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866055082] [2024-06-04 14:25:00,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:00,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:00,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:00,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:00,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:00,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:25:00,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 633 transitions, 8549 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:25:00,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:00,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:25:00,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:02,425 INFO L124 PetriNetUnfolderBase]: 4024/6824 cut-off events. [2024-06-04 14:25:02,426 INFO L125 PetriNetUnfolderBase]: For 760632/760638 co-relation queries the response was YES. [2024-06-04 14:25:02,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48362 conditions, 6824 events. 4024/6824 cut-off events. For 760632/760638 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 48145 event pairs, 755 based on Foata normal form. 6/6822 useless extension candidates. Maximal degree in co-relation 48146. Up to 6080 conditions per place. [2024-06-04 14:25:02,526 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 571 selfloop transitions, 72 changer transitions 0/650 dead transitions. [2024-06-04 14:25:02,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 650 transitions, 9917 flow [2024-06-04 14:25:02,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:02,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:02,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-04 14:25:02,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-04 14:25:02,527 INFO L175 Difference]: Start difference. First operand has 470 places, 633 transitions, 8549 flow. Second operand 7 states and 158 transitions. [2024-06-04 14:25:02,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 650 transitions, 9917 flow [2024-06-04 14:25:07,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 650 transitions, 9717 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 14:25:07,288 INFO L231 Difference]: Finished difference. Result has 473 places, 635 transitions, 8548 flow [2024-06-04 14:25:07,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8351, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8548, PETRI_PLACES=473, PETRI_TRANSITIONS=635} [2024-06-04 14:25:07,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-04 14:25:07,288 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 635 transitions, 8548 flow [2024-06-04 14:25:07,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:25:07,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:07,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:07,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-04 14:25:07,289 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:07,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:07,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1177581334, now seen corresponding path program 9 times [2024-06-04 14:25:07,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:07,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223523652] [2024-06-04 14:25:07,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:07,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:07,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:07,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223523652] [2024-06-04 14:25:07,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223523652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:07,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:07,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:07,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775135919] [2024-06-04 14:25:07,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:07,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:07,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:07,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:07,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:07,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:25:07,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 635 transitions, 8548 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:25:07,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:07,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:25:07,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:09,058 INFO L124 PetriNetUnfolderBase]: 4032/6836 cut-off events. [2024-06-04 14:25:09,058 INFO L125 PetriNetUnfolderBase]: For 772479/772485 co-relation queries the response was YES. [2024-06-04 14:25:09,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48336 conditions, 6836 events. 4032/6836 cut-off events. For 772479/772485 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48299 event pairs, 751 based on Foata normal form. 6/6830 useless extension candidates. Maximal degree in co-relation 48119. Up to 6060 conditions per place. [2024-06-04 14:25:09,161 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 566 selfloop transitions, 80 changer transitions 0/653 dead transitions. [2024-06-04 14:25:09,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 653 transitions, 9918 flow [2024-06-04 14:25:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-04 14:25:09,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2024-06-04 14:25:09,162 INFO L175 Difference]: Start difference. First operand has 473 places, 635 transitions, 8548 flow. Second operand 7 states and 159 transitions. [2024-06-04 14:25:09,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 653 transitions, 9918 flow [2024-06-04 14:25:14,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 653 transitions, 9745 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:14,793 INFO L231 Difference]: Finished difference. Result has 475 places, 637 transitions, 8584 flow [2024-06-04 14:25:14,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8375, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8584, PETRI_PLACES=475, PETRI_TRANSITIONS=637} [2024-06-04 14:25:14,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-04 14:25:14,793 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 637 transitions, 8584 flow [2024-06-04 14:25:14,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:25:14,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:14,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:14,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-04 14:25:14,794 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:14,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:14,794 INFO L85 PathProgramCache]: Analyzing trace with hash -371596596, now seen corresponding path program 10 times [2024-06-04 14:25:14,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:14,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435671918] [2024-06-04 14:25:14,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:14,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:14,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:14,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435671918] [2024-06-04 14:25:14,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435671918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:14,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:14,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:14,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532282476] [2024-06-04 14:25:14,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:14,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:14,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:14,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:14,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:14,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:25:14,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 637 transitions, 8584 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:25:14,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:14,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:25:14,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:16,507 INFO L124 PetriNetUnfolderBase]: 4022/6827 cut-off events. [2024-06-04 14:25:16,507 INFO L125 PetriNetUnfolderBase]: For 768263/768269 co-relation queries the response was YES. [2024-06-04 14:25:16,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47843 conditions, 6827 events. 4022/6827 cut-off events. For 768263/768269 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48203 event pairs, 732 based on Foata normal form. 8/6830 useless extension candidates. Maximal degree in co-relation 47625. Up to 6063 conditions per place. [2024-06-04 14:25:16,610 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 585 selfloop transitions, 76 changer transitions 0/668 dead transitions. [2024-06-04 14:25:16,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 668 transitions, 9984 flow [2024-06-04 14:25:16,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:25:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:25:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 14:25:16,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-04 14:25:16,611 INFO L175 Difference]: Start difference. First operand has 475 places, 637 transitions, 8584 flow. Second operand 8 states and 195 transitions. [2024-06-04 14:25:16,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 668 transitions, 9984 flow [2024-06-04 14:25:21,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 668 transitions, 9759 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:21,298 INFO L231 Difference]: Finished difference. Result has 478 places, 637 transitions, 8525 flow [2024-06-04 14:25:21,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8359, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8525, PETRI_PLACES=478, PETRI_TRANSITIONS=637} [2024-06-04 14:25:21,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-04 14:25:21,299 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 637 transitions, 8525 flow [2024-06-04 14:25:21,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:25:21,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:21,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:21,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-04 14:25:21,299 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:21,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:21,300 INFO L85 PathProgramCache]: Analyzing trace with hash -105899316, now seen corresponding path program 11 times [2024-06-04 14:25:21,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:21,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487598426] [2024-06-04 14:25:21,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:21,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:21,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:21,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487598426] [2024-06-04 14:25:21,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487598426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:21,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:21,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:21,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743775495] [2024-06-04 14:25:21,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:21,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:21,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:21,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:21,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:21,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:25:21,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 637 transitions, 8525 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:25:21,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:21,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:25:21,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:23,114 INFO L124 PetriNetUnfolderBase]: 4012/6807 cut-off events. [2024-06-04 14:25:23,115 INFO L125 PetriNetUnfolderBase]: For 750893/750899 co-relation queries the response was YES. [2024-06-04 14:25:23,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47240 conditions, 6807 events. 4012/6807 cut-off events. For 750893/750899 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48092 event pairs, 746 based on Foata normal form. 8/6807 useless extension candidates. Maximal degree in co-relation 47021. Up to 6055 conditions per place. [2024-06-04 14:25:23,213 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 584 selfloop transitions, 66 changer transitions 0/657 dead transitions. [2024-06-04 14:25:23,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 657 transitions, 9875 flow [2024-06-04 14:25:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 14:25:23,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 14:25:23,214 INFO L175 Difference]: Start difference. First operand has 478 places, 637 transitions, 8525 flow. Second operand 6 states and 147 transitions. [2024-06-04 14:25:23,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 657 transitions, 9875 flow [2024-06-04 14:25:27,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 657 transitions, 9673 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-04 14:25:27,763 INFO L231 Difference]: Finished difference. Result has 476 places, 637 transitions, 8466 flow [2024-06-04 14:25:27,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8323, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8466, PETRI_PLACES=476, PETRI_TRANSITIONS=637} [2024-06-04 14:25:27,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-04 14:25:27,764 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 637 transitions, 8466 flow [2024-06-04 14:25:27,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:25:27,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:27,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:27,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-04 14:25:27,764 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:27,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:27,769 INFO L85 PathProgramCache]: Analyzing trace with hash -105572886, now seen corresponding path program 12 times [2024-06-04 14:25:27,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:27,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284674404] [2024-06-04 14:25:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:27,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:27,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:27,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284674404] [2024-06-04 14:25:27,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284674404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:27,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:27,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:25:27,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595868007] [2024-06-04 14:25:27,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:27,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:25:27,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:27,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:25:27,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:25:27,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:25:27,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 637 transitions, 8466 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:25:27,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:27,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:25:27,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:29,543 INFO L124 PetriNetUnfolderBase]: 4002/6808 cut-off events. [2024-06-04 14:25:29,543 INFO L125 PetriNetUnfolderBase]: For 709464/709470 co-relation queries the response was YES. [2024-06-04 14:25:29,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46476 conditions, 6808 events. 4002/6808 cut-off events. For 709464/709470 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48147 event pairs, 631 based on Foata normal form. 8/6808 useless extension candidates. Maximal degree in co-relation 46257. Up to 5900 conditions per place. [2024-06-04 14:25:29,645 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 563 selfloop transitions, 88 changer transitions 0/658 dead transitions. [2024-06-04 14:25:29,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 658 transitions, 9820 flow [2024-06-04 14:25:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:25:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:25:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 14:25:29,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 14:25:29,646 INFO L175 Difference]: Start difference. First operand has 476 places, 637 transitions, 8466 flow. Second operand 6 states and 148 transitions. [2024-06-04 14:25:29,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 658 transitions, 9820 flow [2024-06-04 14:25:34,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 658 transitions, 9634 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:34,356 INFO L231 Difference]: Finished difference. Result has 477 places, 637 transitions, 8467 flow [2024-06-04 14:25:34,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8280, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8467, PETRI_PLACES=477, PETRI_TRANSITIONS=637} [2024-06-04 14:25:34,357 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-04 14:25:34,357 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 637 transitions, 8467 flow [2024-06-04 14:25:34,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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) [2024-06-04 14:25:34,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:34,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:34,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-04 14:25:34,358 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:34,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:34,358 INFO L85 PathProgramCache]: Analyzing trace with hash 71416902, now seen corresponding path program 3 times [2024-06-04 14:25:34,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:34,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847551153] [2024-06-04 14:25:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:34,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:34,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:34,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847551153] [2024-06-04 14:25:34,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847551153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:34,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:34,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:25:34,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922676069] [2024-06-04 14:25:34,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:34,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:25:34,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:34,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:25:34,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:25:34,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:25:34,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 637 transitions, 8467 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:34,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:34,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:25:34,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:36,135 INFO L124 PetriNetUnfolderBase]: 4010/6809 cut-off events. [2024-06-04 14:25:36,135 INFO L125 PetriNetUnfolderBase]: For 705756/705756 co-relation queries the response was YES. [2024-06-04 14:25:36,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46784 conditions, 6809 events. 4010/6809 cut-off events. For 705756/705756 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 48122 event pairs, 748 based on Foata normal form. 2/6804 useless extension candidates. Maximal degree in co-relation 46564. Up to 6088 conditions per place. [2024-06-04 14:25:36,238 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 581 selfloop transitions, 67 changer transitions 0/655 dead transitions. [2024-06-04 14:25:36,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 655 transitions, 9881 flow [2024-06-04 14:25:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:25:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:25:36,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-04 14:25:36,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-04 14:25:36,239 INFO L175 Difference]: Start difference. First operand has 477 places, 637 transitions, 8467 flow. Second operand 8 states and 179 transitions. [2024-06-04 14:25:36,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 655 transitions, 9881 flow [2024-06-04 14:25:40,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 655 transitions, 9637 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 14:25:40,360 INFO L231 Difference]: Finished difference. Result has 478 places, 639 transitions, 8446 flow [2024-06-04 14:25:40,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8223, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8446, PETRI_PLACES=478, PETRI_TRANSITIONS=639} [2024-06-04 14:25:40,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-04 14:25:40,361 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 639 transitions, 8446 flow [2024-06-04 14:25:40,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:40,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:40,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:40,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-04 14:25:40,362 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:40,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:40,362 INFO L85 PathProgramCache]: Analyzing trace with hash 138304140, now seen corresponding path program 4 times [2024-06-04 14:25:40,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:40,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772148959] [2024-06-04 14:25:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:40,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:40,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:40,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772148959] [2024-06-04 14:25:40,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772148959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:40,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:40,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:25:40,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867079164] [2024-06-04 14:25:40,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:40,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:25:40,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:40,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:25:40,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:25:40,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:25:40,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 639 transitions, 8446 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:40,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:40,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:25:40,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:42,119 INFO L124 PetriNetUnfolderBase]: 4018/6813 cut-off events. [2024-06-04 14:25:42,119 INFO L125 PetriNetUnfolderBase]: For 706086/706086 co-relation queries the response was YES. [2024-06-04 14:25:42,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46802 conditions, 6813 events. 4018/6813 cut-off events. For 706086/706086 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 48068 event pairs, 750 based on Foata normal form. 2/6808 useless extension candidates. Maximal degree in co-relation 46582. Up to 6080 conditions per place. [2024-06-04 14:25:42,425 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 580 selfloop transitions, 72 changer transitions 0/659 dead transitions. [2024-06-04 14:25:42,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 659 transitions, 9876 flow [2024-06-04 14:25:42,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:25:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:25:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-04 14:25:42,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 14:25:42,427 INFO L175 Difference]: Start difference. First operand has 478 places, 639 transitions, 8446 flow. Second operand 9 states and 198 transitions. [2024-06-04 14:25:42,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 659 transitions, 9876 flow [2024-06-04 14:25:46,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 659 transitions, 9669 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-04 14:25:46,755 INFO L231 Difference]: Finished difference. Result has 481 places, 641 transitions, 8476 flow [2024-06-04 14:25:46,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8239, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8476, PETRI_PLACES=481, PETRI_TRANSITIONS=641} [2024-06-04 14:25:46,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-04 14:25:46,756 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 641 transitions, 8476 flow [2024-06-04 14:25:46,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:46,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:46,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:46,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-04 14:25:46,757 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:46,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:46,757 INFO L85 PathProgramCache]: Analyzing trace with hash 721390580, now seen corresponding path program 5 times [2024-06-04 14:25:46,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:46,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610492257] [2024-06-04 14:25:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:46,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:46,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:46,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610492257] [2024-06-04 14:25:46,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610492257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:46,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:46,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:25:46,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704937407] [2024-06-04 14:25:46,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:46,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:25:46,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:46,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:25:46,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:25:46,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:25:46,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 641 transitions, 8476 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:46,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:46,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:25:46,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:48,603 INFO L124 PetriNetUnfolderBase]: 4026/6838 cut-off events. [2024-06-04 14:25:48,603 INFO L125 PetriNetUnfolderBase]: For 718601/718607 co-relation queries the response was YES. [2024-06-04 14:25:48,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47035 conditions, 6838 events. 4026/6838 cut-off events. For 718601/718607 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 48290 event pairs, 750 based on Foata normal form. 6/6839 useless extension candidates. Maximal degree in co-relation 46814. Up to 6106 conditions per place. [2024-06-04 14:25:48,702 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 584 selfloop transitions, 70 changer transitions 0/661 dead transitions. [2024-06-04 14:25:48,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 661 transitions, 9916 flow [2024-06-04 14:25:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 14:25:48,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-04 14:25:48,703 INFO L175 Difference]: Start difference. First operand has 481 places, 641 transitions, 8476 flow. Second operand 7 states and 163 transitions. [2024-06-04 14:25:48,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 661 transitions, 9916 flow [2024-06-04 14:25:52,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 661 transitions, 9695 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-04 14:25:52,712 INFO L231 Difference]: Finished difference. Result has 481 places, 643 transitions, 8495 flow [2024-06-04 14:25:52,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8255, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8495, PETRI_PLACES=481, PETRI_TRANSITIONS=643} [2024-06-04 14:25:52,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-04 14:25:52,713 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 643 transitions, 8495 flow [2024-06-04 14:25:52,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:52,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:52,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:52,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-04 14:25:52,713 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:52,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:52,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2126275932, now seen corresponding path program 6 times [2024-06-04 14:25:52,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:52,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876358129] [2024-06-04 14:25:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:52,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:52,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:52,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876358129] [2024-06-04 14:25:52,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876358129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:52,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:52,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:25:52,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238004166] [2024-06-04 14:25:52,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:52,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:25:52,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:52,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:25:52,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:25:52,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:25:52,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 643 transitions, 8495 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:52,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:52,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:25:52,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:25:54,479 INFO L124 PetriNetUnfolderBase]: 4034/6841 cut-off events. [2024-06-04 14:25:54,479 INFO L125 PetriNetUnfolderBase]: For 729409/729409 co-relation queries the response was YES. [2024-06-04 14:25:54,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47221 conditions, 6841 events. 4034/6841 cut-off events. For 729409/729409 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 48348 event pairs, 757 based on Foata normal form. 2/6836 useless extension candidates. Maximal degree in co-relation 46999. Up to 6118 conditions per place. [2024-06-04 14:25:54,580 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 583 selfloop transitions, 70 changer transitions 0/660 dead transitions. [2024-06-04 14:25:54,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 660 transitions, 9929 flow [2024-06-04 14:25:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:25:54,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:25:54,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-04 14:25:54,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-04 14:25:54,581 INFO L175 Difference]: Start difference. First operand has 481 places, 643 transitions, 8495 flow. Second operand 7 states and 160 transitions. [2024-06-04 14:25:54,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 660 transitions, 9929 flow [2024-06-04 14:25:59,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 660 transitions, 9715 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-04 14:25:59,287 INFO L231 Difference]: Finished difference. Result has 483 places, 645 transitions, 8525 flow [2024-06-04 14:25:59,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8281, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8525, PETRI_PLACES=483, PETRI_TRANSITIONS=645} [2024-06-04 14:25:59,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 440 predicate places. [2024-06-04 14:25:59,287 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 645 transitions, 8525 flow [2024-06-04 14:25:59,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:59,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:25:59,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:25:59,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-04 14:25:59,289 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:25:59,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:25:59,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1735439900, now seen corresponding path program 7 times [2024-06-04 14:25:59,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:25:59,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287343375] [2024-06-04 14:25:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:25:59,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:25:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:25:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:25:59,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:25:59,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287343375] [2024-06-04 14:25:59,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287343375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:25:59,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:25:59,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:25:59,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464308567] [2024-06-04 14:25:59,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:25:59,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:25:59,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:25:59,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:25:59,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:25:59,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:25:59,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 645 transitions, 8525 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:25:59,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:25:59,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:25:59,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:01,076 INFO L124 PetriNetUnfolderBase]: 4042/6858 cut-off events. [2024-06-04 14:26:01,077 INFO L125 PetriNetUnfolderBase]: For 742150/742156 co-relation queries the response was YES. [2024-06-04 14:26:01,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47437 conditions, 6858 events. 4042/6858 cut-off events. For 742150/742156 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 48448 event pairs, 742 based on Foata normal form. 6/6859 useless extension candidates. Maximal degree in co-relation 47214. Up to 6090 conditions per place. [2024-06-04 14:26:01,177 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 580 selfloop transitions, 80 changer transitions 0/667 dead transitions. [2024-06-04 14:26:01,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 667 transitions, 9989 flow [2024-06-04 14:26:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:26:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:26:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 14:26:01,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 14:26:01,178 INFO L175 Difference]: Start difference. First operand has 483 places, 645 transitions, 8525 flow. Second operand 8 states and 182 transitions. [2024-06-04 14:26:01,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 667 transitions, 9989 flow [2024-06-04 14:26:05,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 667 transitions, 9761 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:05,944 INFO L231 Difference]: Finished difference. Result has 486 places, 647 transitions, 8565 flow [2024-06-04 14:26:05,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8301, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8565, PETRI_PLACES=486, PETRI_TRANSITIONS=647} [2024-06-04 14:26:05,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-04 14:26:05,960 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 647 transitions, 8565 flow [2024-06-04 14:26:05,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:05,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:05,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:05,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-04 14:26:05,961 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:26:05,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:05,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2111038812, now seen corresponding path program 8 times [2024-06-04 14:26:05,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:05,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988608804] [2024-06-04 14:26:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:05,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:06,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:06,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988608804] [2024-06-04 14:26:06,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988608804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:06,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:06,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:26:06,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246115494] [2024-06-04 14:26:06,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:06,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:26:06,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:06,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:26:06,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:26:06,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:26:06,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 647 transitions, 8565 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:06,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:06,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:26:06,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:07,784 INFO L124 PetriNetUnfolderBase]: 4037/6838 cut-off events. [2024-06-04 14:26:07,785 INFO L125 PetriNetUnfolderBase]: For 724903/724903 co-relation queries the response was YES. [2024-06-04 14:26:07,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46964 conditions, 6838 events. 4037/6838 cut-off events. For 724903/724903 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 48274 event pairs, 738 based on Foata normal form. 2/6833 useless extension candidates. Maximal degree in co-relation 46740. Up to 6083 conditions per place. [2024-06-04 14:26:07,891 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 579 selfloop transitions, 80 changer transitions 0/666 dead transitions. [2024-06-04 14:26:07,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 666 transitions, 10019 flow [2024-06-04 14:26:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:26:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:26:07,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-04 14:26:07,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-04 14:26:07,892 INFO L175 Difference]: Start difference. First operand has 486 places, 647 transitions, 8565 flow. Second operand 8 states and 179 transitions. [2024-06-04 14:26:07,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 666 transitions, 10019 flow [2024-06-04 14:26:12,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 666 transitions, 9781 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-04 14:26:12,277 INFO L231 Difference]: Finished difference. Result has 488 places, 649 transitions, 8595 flow [2024-06-04 14:26:12,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8327, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8595, PETRI_PLACES=488, PETRI_TRANSITIONS=649} [2024-06-04 14:26:12,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-04 14:26:12,278 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 649 transitions, 8595 flow [2024-06-04 14:26:12,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:12,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:12,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:12,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-04 14:26:12,278 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:26:12,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:12,279 INFO L85 PathProgramCache]: Analyzing trace with hash 760878703, now seen corresponding path program 1 times [2024-06-04 14:26:12,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:12,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493822906] [2024-06-04 14:26:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:12,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:12,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:12,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493822906] [2024-06-04 14:26:12,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493822906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:12,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:12,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:26:12,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752799030] [2024-06-04 14:26:12,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:12,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:26:12,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:12,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:26:12,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:26:12,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:26:12,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 649 transitions, 8595 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:12,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:12,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:26:12,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:14,168 INFO L124 PetriNetUnfolderBase]: 4058/6890 cut-off events. [2024-06-04 14:26:14,168 INFO L125 PetriNetUnfolderBase]: For 742832/742838 co-relation queries the response was YES. [2024-06-04 14:26:14,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47386 conditions, 6890 events. 4058/6890 cut-off events. For 742832/742838 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 48774 event pairs, 809 based on Foata normal form. 1/6884 useless extension candidates. Maximal degree in co-relation 47161. Up to 5509 conditions per place. [2024-06-04 14:26:14,268 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 384 selfloop transitions, 304 changer transitions 0/695 dead transitions. [2024-06-04 14:26:14,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 695 transitions, 10939 flow [2024-06-04 14:26:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:26:14,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:26:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-04 14:26:14,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-04 14:26:14,269 INFO L175 Difference]: Start difference. First operand has 488 places, 649 transitions, 8595 flow. Second operand 9 states and 224 transitions. [2024-06-04 14:26:14,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 695 transitions, 10939 flow [2024-06-04 14:26:19,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 695 transitions, 10685 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-04 14:26:19,147 INFO L231 Difference]: Finished difference. Result has 491 places, 661 transitions, 9095 flow [2024-06-04 14:26:19,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8347, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9095, PETRI_PLACES=491, PETRI_TRANSITIONS=661} [2024-06-04 14:26:19,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-04 14:26:19,148 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 661 transitions, 9095 flow [2024-06-04 14:26:19,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:19,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:19,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:19,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-04 14:26:19,149 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:26:19,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:19,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1140709841, now seen corresponding path program 2 times [2024-06-04 14:26:19,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:19,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102491711] [2024-06-04 14:26:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:19,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:19,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:19,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102491711] [2024-06-04 14:26:19,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102491711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:19,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:19,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:26:19,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003839045] [2024-06-04 14:26:19,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:19,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:26:19,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:19,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:26:19,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:26:19,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:26:19,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 661 transitions, 9095 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:19,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:19,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:26:19,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:21,033 INFO L124 PetriNetUnfolderBase]: 4071/6910 cut-off events. [2024-06-04 14:26:21,034 INFO L125 PetriNetUnfolderBase]: For 751486/751492 co-relation queries the response was YES. [2024-06-04 14:26:21,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48635 conditions, 6910 events. 4071/6910 cut-off events. For 751486/751492 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 48978 event pairs, 771 based on Foata normal form. 5/6910 useless extension candidates. Maximal degree in co-relation 48409. Up to 5991 conditions per place. [2024-06-04 14:26:21,137 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 511 selfloop transitions, 178 changer transitions 0/696 dead transitions. [2024-06-04 14:26:21,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 696 transitions, 10873 flow [2024-06-04 14:26:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:26:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:26:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-04 14:26:21,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 14:26:21,138 INFO L175 Difference]: Start difference. First operand has 491 places, 661 transitions, 9095 flow. Second operand 9 states and 216 transitions. [2024-06-04 14:26:21,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 696 transitions, 10873 flow [2024-06-04 14:26:26,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 696 transitions, 10625 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-04 14:26:26,741 INFO L231 Difference]: Finished difference. Result has 497 places, 667 transitions, 9291 flow [2024-06-04 14:26:26,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8879, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9291, PETRI_PLACES=497, PETRI_TRANSITIONS=667} [2024-06-04 14:26:26,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-04 14:26:26,741 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 667 transitions, 9291 flow [2024-06-04 14:26:26,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:26,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:26,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:26,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-04 14:26:26,742 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:26:26,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:26,742 INFO L85 PathProgramCache]: Analyzing trace with hash -760499375, now seen corresponding path program 3 times [2024-06-04 14:26:26,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:26,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799531719] [2024-06-04 14:26:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:26,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:26,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:26,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799531719] [2024-06-04 14:26:26,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799531719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:26,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:26,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:26:26,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114788719] [2024-06-04 14:26:26,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:26,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:26:26,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:26,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:26:26,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:26:26,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:26:26,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 667 transitions, 9291 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:26,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:26,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:26:26,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:26:28,591 INFO L124 PetriNetUnfolderBase]: 4068/6910 cut-off events. [2024-06-04 14:26:28,591 INFO L125 PetriNetUnfolderBase]: For 756665/756671 co-relation queries the response was YES. [2024-06-04 14:26:28,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48899 conditions, 6910 events. 4068/6910 cut-off events. For 756665/756671 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 49081 event pairs, 763 based on Foata normal form. 5/6910 useless extension candidates. Maximal degree in co-relation 48670. Up to 5988 conditions per place. [2024-06-04 14:26:28,697 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 511 selfloop transitions, 179 changer transitions 0/697 dead transitions. [2024-06-04 14:26:28,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 697 transitions, 10745 flow [2024-06-04 14:26:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:26:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:26:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-04 14:26:28,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-04 14:26:28,698 INFO L175 Difference]: Start difference. First operand has 497 places, 667 transitions, 9291 flow. Second operand 11 states and 249 transitions. [2024-06-04 14:26:28,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 697 transitions, 10745 flow [2024-06-04 14:26:34,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 697 transitions, 10525 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 14:26:34,194 INFO L231 Difference]: Finished difference. Result has 503 places, 667 transitions, 9435 flow [2024-06-04 14:26:34,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9071, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9435, PETRI_PLACES=503, PETRI_TRANSITIONS=667} [2024-06-04 14:26:34,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-04 14:26:34,194 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 667 transitions, 9435 flow [2024-06-04 14:26:34,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:34,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:26:34,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:26:34,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-04 14:26:34,195 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:26:34,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:26:34,195 INFO L85 PathProgramCache]: Analyzing trace with hash 55399983, now seen corresponding path program 4 times [2024-06-04 14:26:34,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:26:34,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439480623] [2024-06-04 14:26:34,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:26:34,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:26:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:26:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:26:34,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:26:34,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439480623] [2024-06-04 14:26:34,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439480623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:26:34,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:26:34,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:26:34,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104182] [2024-06-04 14:26:34,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:26:34,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:26:34,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:26:34,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:26:34,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:26:34,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 14:26:34,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 667 transitions, 9435 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:26:34,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:26:34,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 14:26:34,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand