./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:02:21,121 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:02:21,199 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:02:21,205 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:02:21,206 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:02:21,243 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:02:21,244 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:02:21,244 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:02:21,245 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:02:21,248 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:02:21,248 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:02:21,249 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:02:21,249 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:02:21,250 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:02:21,250 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:02:21,251 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:02:21,251 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:02:21,251 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:02:21,251 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:02:21,251 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:02:21,252 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:02:21,252 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:02:21,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:02:21,252 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:02:21,253 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:02:21,253 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:02:21,253 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:02:21,253 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:02:21,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:02:21,254 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:02:21,255 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:02:21,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:02:21,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:02:21,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:02:21,255 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:02:21,255 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:02:21,256 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:02:21,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:02:21,256 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:02:21,256 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:02:21,256 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:02:21,256 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:02:21,256 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:02:21,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 00:02:21,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:02:21,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:02:21,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:02:21,508 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:02:21,509 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:02:21,510 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 00:02:22,626 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:02:22,868 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:02:22,869 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 00:02:22,881 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6173d18e3/766dd51f8f974e769baf368b58eb6787/FLAGcaca45511 [2024-06-28 00:02:22,892 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6173d18e3/766dd51f8f974e769baf368b58eb6787 [2024-06-28 00:02:22,894 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:02:22,895 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:02:22,897 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-28 00:02:22,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:02:22,975 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:02:22,976 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:02:22,976 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:02:22,980 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:02:22,981 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:02:22" (1/2) ... [2024-06-28 00:02:22,982 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a3e72ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:02:22, skipping insertion in model container [2024-06-28 00:02:22,982 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:02:22" (1/2) ... [2024-06-28 00:02:22,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6d33242f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:02:22, skipping insertion in model container [2024-06-28 00:02:22,984 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:02:22" (2/2) ... [2024-06-28 00:02:22,985 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a3e72ef and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:22, skipping insertion in model container [2024-06-28 00:02:22,985 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:02:22" (2/2) ... [2024-06-28 00:02:22,986 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:02:23,010 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:02:23,012 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ! multithreaded || ((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-28 00:02:23,012 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ! multithreaded || ((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-28 00:02:23,012 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ! multithreaded || ((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (0LL - (long long )y$r_buff0_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd2) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )y) + (long long )y$w_buff0 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-28 00:02:23,013 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:02:23,013 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-28 00:02:23,053 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:02:23,404 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:02:23,417 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:02:23,512 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:02:23,543 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:02:23,543 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:23 WrapperNode [2024-06-28 00:02:23,543 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:02:23,544 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:02:23,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:02:23,545 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:02:23,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:23" (1/1) ... [2024-06-28 00:02:23,570 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:23" (1/1) ... [2024-06-28 00:02:23,594 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 166 [2024-06-28 00:02:23,595 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:02:23,595 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:02:23,596 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:02:23,596 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:02:23,606 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:23" (1/1) ... [2024-06-28 00:02:23,606 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:23" (1/1) ... [2024-06-28 00:02:23,608 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:23" (1/1) ... [2024-06-28 00:02:23,627 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 00:02:23,628 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:23" (1/1) ... [2024-06-28 00:02:23,628 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:23" (1/1) ... [2024-06-28 00:02:23,634 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:23" (1/1) ... [2024-06-28 00:02:23,636 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:23" (1/1) ... [2024-06-28 00:02:23,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:23" (1/1) ... [2024-06-28 00:02:23,639 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:23" (1/1) ... [2024-06-28 00:02:23,642 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:02:23,643 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:02:23,643 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:02:23,643 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:02:23,644 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:23" (1/1) ... [2024-06-28 00:02:23,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:02:23,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:02:23,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 00:02:23,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 00:02:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:02:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:02:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:02:23,712 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:02:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:02:23,712 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:02:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:02:23,712 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:02:23,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:02:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:02:23,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:02:23,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:02:23,714 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:02:23,817 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:02:23,818 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:02:24,166 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:02:24,166 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:02:24,331 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:02:24,331 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:02:24,331 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:02:24 BoogieIcfgContainer [2024-06-28 00:02:24,332 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:02:24,333 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:02:24,334 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:02:24,336 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:02:24,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:02:22" (1/4) ... [2024-06-28 00:02:24,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa22aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:02:24, skipping insertion in model container [2024-06-28 00:02:24,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:02:22" (2/4) ... [2024-06-28 00:02:24,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa22aeb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:02:24, skipping insertion in model container [2024-06-28 00:02:24,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:02:23" (3/4) ... [2024-06-28 00:02:24,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa22aeb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:02:24, skipping insertion in model container [2024-06-28 00:02:24,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:02:24" (4/4) ... [2024-06-28 00:02:24,341 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-28 00:02:24,355 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:02:24,355 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 00:02:24,355 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:02:24,398 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:02:24,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-28 00:02:24,455 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-28 00:02:24,455 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:02:24,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 00:02:24,457 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-28 00:02:24,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-28 00:02:24,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:02:24,477 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;@1e658248, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:02:24,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 00:02:24,481 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:02:24,481 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:02:24,481 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:02:24,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:24,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:02:24,482 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)] === [2024-06-28 00:02:24,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:24,486 INFO L85 PathProgramCache]: Analyzing trace with hash 403727084, now seen corresponding path program 1 times [2024-06-28 00:02:24,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:24,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763477895] [2024-06-28 00:02:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:24,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:25,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:25,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763477895] [2024-06-28 00:02:25,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763477895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:25,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:25,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:02:25,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443423892] [2024-06-28 00:02:25,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:25,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:02:25,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:25,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:02:25,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:02:25,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 00:02:25,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:25,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:25,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 00:02:25,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:25,303 INFO L124 PetriNetUnfolderBase]: 603/1030 cut-off events. [2024-06-28 00:02:25,304 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-28 00:02:25,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2022 conditions, 1030 events. 603/1030 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5387 event pairs, 376 based on Foata normal form. 1/978 useless extension candidates. Maximal degree in co-relation 2010. Up to 929 conditions per place. [2024-06-28 00:02:25,318 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 28 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-28 00:02:25,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 161 flow [2024-06-28 00:02:25,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:02:25,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:02:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-28 00:02:25,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-28 00:02:25,330 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 77 transitions. [2024-06-28 00:02:25,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 161 flow [2024-06-28 00:02:25,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:02:25,335 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-28 00:02:25,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-28 00:02:25,339 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-28 00:02:25,339 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-28 00:02:25,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:25,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:25,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:25,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:02:25,340 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)] === [2024-06-28 00:02:25,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:25,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1526065087, now seen corresponding path program 1 times [2024-06-28 00:02:25,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:25,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826881991] [2024-06-28 00:02:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:25,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:25,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:25,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826881991] [2024-06-28 00:02:25,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826881991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:25,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:25,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:02:25,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516395854] [2024-06-28 00:02:25,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:25,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:02:25,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:25,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:02:25,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:02:25,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-28 00:02:25,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:25,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:25,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-28 00:02:25,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:25,863 INFO L124 PetriNetUnfolderBase]: 755/1275 cut-off events. [2024-06-28 00:02:25,863 INFO L125 PetriNetUnfolderBase]: For 208/213 co-relation queries the response was YES. [2024-06-28 00:02:25,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2861 conditions, 1275 events. 755/1275 cut-off events. For 208/213 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6589 event pairs, 242 based on Foata normal form. 13/1251 useless extension candidates. Maximal degree in co-relation 2849. Up to 1093 conditions per place. [2024-06-28 00:02:25,870 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 35 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-28 00:02:25,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 218 flow [2024-06-28 00:02:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:02:25,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:02:25,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-28 00:02:25,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 00:02:25,874 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 96 transitions. [2024-06-28 00:02:25,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 218 flow [2024-06-28 00:02:25,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:02:25,878 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 121 flow [2024-06-28 00:02:25,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-28 00:02:25,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-06-28 00:02:25,879 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 121 flow [2024-06-28 00:02:25,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:25,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:25,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:25,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:02:25,883 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:25,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:25,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1494515606, now seen corresponding path program 1 times [2024-06-28 00:02:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:25,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576542207] [2024-06-28 00:02:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:25,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:26,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:26,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576542207] [2024-06-28 00:02:26,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576542207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:26,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:26,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:02:26,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158014455] [2024-06-28 00:02:26,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:26,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:02:26,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:26,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:02:26,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:02:26,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 00:02:26,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:26,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:26,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 00:02:26,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:26,369 INFO L124 PetriNetUnfolderBase]: 583/1005 cut-off events. [2024-06-28 00:02:26,369 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2024-06-28 00:02:26,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2478 conditions, 1005 events. 583/1005 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5241 event pairs, 322 based on Foata normal form. 2/984 useless extension candidates. Maximal degree in co-relation 2464. Up to 889 conditions per place. [2024-06-28 00:02:26,376 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 33 selfloop transitions, 7 changer transitions 0/49 dead transitions. [2024-06-28 00:02:26,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 241 flow [2024-06-28 00:02:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:02:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:02:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-28 00:02:26,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 00:02:26,381 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 121 flow. Second operand 4 states and 96 transitions. [2024-06-28 00:02:26,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 241 flow [2024-06-28 00:02:26,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 228 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 00:02:26,384 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 148 flow [2024-06-28 00:02:26,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-28 00:02:26,385 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-28 00:02:26,385 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 148 flow [2024-06-28 00:02:26,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:26,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:26,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:26,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:02:26,387 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)] === [2024-06-28 00:02:26,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash -914655762, now seen corresponding path program 1 times [2024-06-28 00:02:26,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:26,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812612246] [2024-06-28 00:02:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:26,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:26,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:26,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812612246] [2024-06-28 00:02:26,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812612246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:26,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:26,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:02:26,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702088144] [2024-06-28 00:02:26,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:26,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:02:26,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:26,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:02:26,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:02:26,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 00:02:26,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:26,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:26,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 00:02:26,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:27,141 INFO L124 PetriNetUnfolderBase]: 570/992 cut-off events. [2024-06-28 00:02:27,141 INFO L125 PetriNetUnfolderBase]: For 803/803 co-relation queries the response was YES. [2024-06-28 00:02:27,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2656 conditions, 992 events. 570/992 cut-off events. For 803/803 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5143 event pairs, 297 based on Foata normal form. 6/988 useless extension candidates. Maximal degree in co-relation 2641. Up to 843 conditions per place. [2024-06-28 00:02:27,150 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 39 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2024-06-28 00:02:27,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 300 flow [2024-06-28 00:02:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:02:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:02:27,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-28 00:02:27,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-28 00:02:27,153 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 148 flow. Second operand 5 states and 118 transitions. [2024-06-28 00:02:27,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 300 flow [2024-06-28 00:02:27,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 57 transitions, 284 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 00:02:27,156 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 175 flow [2024-06-28 00:02:27,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-06-28 00:02:27,157 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2024-06-28 00:02:27,158 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 175 flow [2024-06-28 00:02:27,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:27,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:27,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:27,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:02:27,159 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:27,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:27,160 INFO L85 PathProgramCache]: Analyzing trace with hash 261541075, now seen corresponding path program 1 times [2024-06-28 00:02:27,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:27,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582016837] [2024-06-28 00:02:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:27,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:27,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:27,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582016837] [2024-06-28 00:02:27,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582016837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:27,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:27,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:27,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390970084] [2024-06-28 00:02:27,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:27,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:27,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:27,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:27,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:27,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-28 00:02:27,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:27,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:27,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-28 00:02:27,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:27,651 INFO L124 PetriNetUnfolderBase]: 730/1249 cut-off events. [2024-06-28 00:02:27,652 INFO L125 PetriNetUnfolderBase]: For 1471/1481 co-relation queries the response was YES. [2024-06-28 00:02:27,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3532 conditions, 1249 events. 730/1249 cut-off events. For 1471/1481 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6428 event pairs, 206 based on Foata normal form. 10/1240 useless extension candidates. Maximal degree in co-relation 3516. Up to 1048 conditions per place. [2024-06-28 00:02:27,659 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 43 selfloop transitions, 12 changer transitions 0/63 dead transitions. [2024-06-28 00:02:27,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 353 flow [2024-06-28 00:02:27,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:02:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:02:27,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-28 00:02:27,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-28 00:02:27,661 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 175 flow. Second operand 5 states and 115 transitions. [2024-06-28 00:02:27,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 353 flow [2024-06-28 00:02:27,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 63 transitions, 328 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 00:02:27,664 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 214 flow [2024-06-28 00:02:27,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2024-06-28 00:02:27,665 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-28 00:02:27,665 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 214 flow [2024-06-28 00:02:27,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:27,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:27,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:27,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:02:27,666 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)] === [2024-06-28 00:02:27,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:27,666 INFO L85 PathProgramCache]: Analyzing trace with hash 261661045, now seen corresponding path program 2 times [2024-06-28 00:02:27,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:27,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285523256] [2024-06-28 00:02:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:27,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:27,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:27,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285523256] [2024-06-28 00:02:27,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285523256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:27,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:27,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:27,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626144721] [2024-06-28 00:02:27,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:27,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:27,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:27,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:27,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:27,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-28 00:02:27,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:27,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:27,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-28 00:02:27,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:28,080 INFO L124 PetriNetUnfolderBase]: 750/1289 cut-off events. [2024-06-28 00:02:28,080 INFO L125 PetriNetUnfolderBase]: For 2138/2141 co-relation queries the response was YES. [2024-06-28 00:02:28,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3891 conditions, 1289 events. 750/1289 cut-off events. For 2138/2141 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6718 event pairs, 187 based on Foata normal form. 2/1271 useless extension candidates. Maximal degree in co-relation 3874. Up to 1019 conditions per place. [2024-06-28 00:02:28,088 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 43 selfloop transitions, 18 changer transitions 0/69 dead transitions. [2024-06-28 00:02:28,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 438 flow [2024-06-28 00:02:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:02:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:02:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-28 00:02:28,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-28 00:02:28,090 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 214 flow. Second operand 5 states and 118 transitions. [2024-06-28 00:02:28,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 438 flow [2024-06-28 00:02:28,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 428 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-28 00:02:28,094 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 294 flow [2024-06-28 00:02:28,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-28 00:02:28,095 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-06-28 00:02:28,095 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 294 flow [2024-06-28 00:02:28,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:28,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:28,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:28,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:02:28,095 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:28,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:28,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1297703964, now seen corresponding path program 1 times [2024-06-28 00:02:28,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:28,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735604829] [2024-06-28 00:02:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:28,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:28,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:28,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735604829] [2024-06-28 00:02:28,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735604829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:28,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:28,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:02:28,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377320624] [2024-06-28 00:02:28,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:28,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:02:28,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:28,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:02:28,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:02:28,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:02:28,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:28,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:28,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:02:28,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:28,529 INFO L124 PetriNetUnfolderBase]: 901/1503 cut-off events. [2024-06-28 00:02:28,530 INFO L125 PetriNetUnfolderBase]: For 3951/3951 co-relation queries the response was YES. [2024-06-28 00:02:28,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4923 conditions, 1503 events. 901/1503 cut-off events. For 3951/3951 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7684 event pairs, 502 based on Foata normal form. 3/1501 useless extension candidates. Maximal degree in co-relation 4902. Up to 1364 conditions per place. [2024-06-28 00:02:28,540 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 52 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-06-28 00:02:28,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 67 transitions, 470 flow [2024-06-28 00:02:28,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:02:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:02:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-28 00:02:28,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-28 00:02:28,542 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 294 flow. Second operand 5 states and 91 transitions. [2024-06-28 00:02:28,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 67 transitions, 470 flow [2024-06-28 00:02:28,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 445 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-28 00:02:28,548 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 343 flow [2024-06-28 00:02:28,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=343, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-28 00:02:28,549 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-28 00:02:28,549 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 343 flow [2024-06-28 00:02:28,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:28,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:28,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:28,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:02:28,550 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)] === [2024-06-28 00:02:28,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:28,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1288096152, now seen corresponding path program 1 times [2024-06-28 00:02:28,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:28,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415207416] [2024-06-28 00:02:28,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:28,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:28,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:28,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415207416] [2024-06-28 00:02:28,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415207416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:28,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:28,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:02:28,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148805075] [2024-06-28 00:02:28,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:28,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:02:28,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:28,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:02:28,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:02:28,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:02:28,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 343 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-28 00:02:28,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:28,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:02:28,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:29,210 INFO L124 PetriNetUnfolderBase]: 789/1357 cut-off events. [2024-06-28 00:02:29,210 INFO L125 PetriNetUnfolderBase]: For 3782/3797 co-relation queries the response was YES. [2024-06-28 00:02:29,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4723 conditions, 1357 events. 789/1357 cut-off events. For 3782/3797 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7146 event pairs, 182 based on Foata normal form. 16/1368 useless extension candidates. Maximal degree in co-relation 4696. Up to 1089 conditions per place. [2024-06-28 00:02:29,222 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 24 changer transitions 0/93 dead transitions. [2024-06-28 00:02:29,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 644 flow [2024-06-28 00:02:29,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:02:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:02:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-28 00:02:29,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-28 00:02:29,224 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 343 flow. Second operand 7 states and 145 transitions. [2024-06-28 00:02:29,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 644 flow [2024-06-28 00:02:29,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 642 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-28 00:02:29,230 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 476 flow [2024-06-28 00:02:29,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=476, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-28 00:02:29,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-28 00:02:29,231 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 476 flow [2024-06-28 00:02:29,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-28 00:02:29,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:29,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:29,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:02:29,232 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)] === [2024-06-28 00:02:29,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:29,232 INFO L85 PathProgramCache]: Analyzing trace with hash 866189828, now seen corresponding path program 2 times [2024-06-28 00:02:29,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:29,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881026312] [2024-06-28 00:02:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:29,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:29,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:29,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881026312] [2024-06-28 00:02:29,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881026312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:29,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:29,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:29,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664227897] [2024-06-28 00:02:29,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:29,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:29,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:29,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:29,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:02:29,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 476 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:29,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:29,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:02:29,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:29,719 INFO L124 PetriNetUnfolderBase]: 846/1455 cut-off events. [2024-06-28 00:02:29,719 INFO L125 PetriNetUnfolderBase]: For 5073/5077 co-relation queries the response was YES. [2024-06-28 00:02:29,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5463 conditions, 1455 events. 846/1455 cut-off events. For 5073/5077 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7756 event pairs, 168 based on Foata normal form. 8/1458 useless extension candidates. Maximal degree in co-relation 5431. Up to 1112 conditions per place. [2024-06-28 00:02:29,731 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 51 selfloop transitions, 36 changer transitions 0/94 dead transitions. [2024-06-28 00:02:29,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 94 transitions, 804 flow [2024-06-28 00:02:29,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:02:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:02:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-28 00:02:29,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-28 00:02:29,733 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 476 flow. Second operand 5 states and 112 transitions. [2024-06-28 00:02:29,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 94 transitions, 804 flow [2024-06-28 00:02:29,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 737 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 00:02:29,741 INFO L231 Difference]: Finished difference. Result has 72 places, 77 transitions, 632 flow [2024-06-28 00:02:29,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=632, PETRI_PLACES=72, PETRI_TRANSITIONS=77} [2024-06-28 00:02:29,742 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-28 00:02:29,742 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 77 transitions, 632 flow [2024-06-28 00:02:29,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:29,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:29,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:29,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:02:29,743 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)] === [2024-06-28 00:02:29,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:29,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1306327007, now seen corresponding path program 1 times [2024-06-28 00:02:29,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:29,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518685619] [2024-06-28 00:02:29,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:29,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:30,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:30,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518685619] [2024-06-28 00:02:30,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518685619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:30,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:30,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:30,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147850653] [2024-06-28 00:02:30,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:30,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:30,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:30,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:30,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:30,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-28 00:02:30,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 77 transitions, 632 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:30,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:30,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-28 00:02:30,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:30,586 INFO L124 PetriNetUnfolderBase]: 932/1620 cut-off events. [2024-06-28 00:02:30,587 INFO L125 PetriNetUnfolderBase]: For 7288/7292 co-relation queries the response was YES. [2024-06-28 00:02:30,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 1620 events. 932/1620 cut-off events. For 7288/7292 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9084 event pairs, 215 based on Foata normal form. 26/1631 useless extension candidates. Maximal degree in co-relation 6248. Up to 1192 conditions per place. [2024-06-28 00:02:30,598 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 69 selfloop transitions, 25 changer transitions 0/102 dead transitions. [2024-06-28 00:02:30,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 918 flow [2024-06-28 00:02:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-28 00:02:30,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-28 00:02:30,600 INFO L175 Difference]: Start difference. First operand has 72 places, 77 transitions, 632 flow. Second operand 6 states and 138 transitions. [2024-06-28 00:02:30,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 918 flow [2024-06-28 00:02:30,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 102 transitions, 885 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-28 00:02:30,610 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 672 flow [2024-06-28 00:02:30,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=672, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-06-28 00:02:30,611 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-28 00:02:30,611 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 672 flow [2024-06-28 00:02:30,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:30,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:30,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:30,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:02:30,611 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)] === [2024-06-28 00:02:30,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:30,612 INFO L85 PathProgramCache]: Analyzing trace with hash -482164434, now seen corresponding path program 3 times [2024-06-28 00:02:30,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:30,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131925235] [2024-06-28 00:02:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:30,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:30,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:30,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131925235] [2024-06-28 00:02:30,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131925235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:30,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:30,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:30,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009689456] [2024-06-28 00:02:30,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:30,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:30,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:30,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:30,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:30,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-28 00:02:30,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 672 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:30,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:30,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-28 00:02:30,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:31,234 INFO L124 PetriNetUnfolderBase]: 924/1576 cut-off events. [2024-06-28 00:02:31,234 INFO L125 PetriNetUnfolderBase]: For 8442/8446 co-relation queries the response was YES. [2024-06-28 00:02:31,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6318 conditions, 1576 events. 924/1576 cut-off events. For 8442/8446 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8737 event pairs, 297 based on Foata normal form. 8/1571 useless extension candidates. Maximal degree in co-relation 6282. Up to 1227 conditions per place. [2024-06-28 00:02:31,256 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 57 selfloop transitions, 30 changer transitions 0/95 dead transitions. [2024-06-28 00:02:31,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 95 transitions, 905 flow [2024-06-28 00:02:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:02:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:02:31,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-28 00:02:31,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-28 00:02:31,259 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 672 flow. Second operand 5 states and 116 transitions. [2024-06-28 00:02:31,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 95 transitions, 905 flow [2024-06-28 00:02:31,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 95 transitions, 846 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 00:02:31,278 INFO L231 Difference]: Finished difference. Result has 78 places, 78 transitions, 694 flow [2024-06-28 00:02:31,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=694, PETRI_PLACES=78, PETRI_TRANSITIONS=78} [2024-06-28 00:02:31,279 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-28 00:02:31,279 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 78 transitions, 694 flow [2024-06-28 00:02:31,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:31,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:31,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:31,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:02:31,280 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)] === [2024-06-28 00:02:31,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:31,280 INFO L85 PathProgramCache]: Analyzing trace with hash -478435909, now seen corresponding path program 2 times [2024-06-28 00:02:31,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:31,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280251335] [2024-06-28 00:02:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:31,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:31,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:31,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280251335] [2024-06-28 00:02:31,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280251335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:31,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:31,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:31,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272436221] [2024-06-28 00:02:31,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:31,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:31,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:31,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:31,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:31,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-28 00:02:31,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 694 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:31,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:31,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-28 00:02:31,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:32,121 INFO L124 PetriNetUnfolderBase]: 952/1653 cut-off events. [2024-06-28 00:02:32,121 INFO L125 PetriNetUnfolderBase]: For 9061/9061 co-relation queries the response was YES. [2024-06-28 00:02:32,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6629 conditions, 1653 events. 952/1653 cut-off events. For 9061/9061 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9246 event pairs, 108 based on Foata normal form. 6/1653 useless extension candidates. Maximal degree in co-relation 6592. Up to 771 conditions per place. [2024-06-28 00:02:32,137 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 60 selfloop transitions, 41 changer transitions 0/109 dead transitions. [2024-06-28 00:02:32,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 109 transitions, 1036 flow [2024-06-28 00:02:32,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:02:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:02:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-28 00:02:32,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-28 00:02:32,139 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 694 flow. Second operand 7 states and 159 transitions. [2024-06-28 00:02:32,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 109 transitions, 1036 flow [2024-06-28 00:02:32,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 109 transitions, 957 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 00:02:32,151 INFO L231 Difference]: Finished difference. Result has 81 places, 81 transitions, 735 flow [2024-06-28 00:02:32,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=735, PETRI_PLACES=81, PETRI_TRANSITIONS=81} [2024-06-28 00:02:32,153 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-28 00:02:32,153 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 81 transitions, 735 flow [2024-06-28 00:02:32,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:32,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:32,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:32,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:02:32,154 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)] === [2024-06-28 00:02:32,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:32,154 INFO L85 PathProgramCache]: Analyzing trace with hash -478441644, now seen corresponding path program 4 times [2024-06-28 00:02:32,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:32,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138861069] [2024-06-28 00:02:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:32,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:32,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:32,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138861069] [2024-06-28 00:02:32,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138861069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:32,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:32,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:32,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561210858] [2024-06-28 00:02:32,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:32,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:32,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:32,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:32,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:32,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-28 00:02:32,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 81 transitions, 735 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:32,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:32,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-28 00:02:32,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:32,932 INFO L124 PetriNetUnfolderBase]: 997/1753 cut-off events. [2024-06-28 00:02:32,933 INFO L125 PetriNetUnfolderBase]: For 10681/10681 co-relation queries the response was YES. [2024-06-28 00:02:32,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7193 conditions, 1753 events. 997/1753 cut-off events. For 10681/10681 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10108 event pairs, 232 based on Foata normal form. 22/1764 useless extension candidates. Maximal degree in co-relation 7155. Up to 1170 conditions per place. [2024-06-28 00:02:32,949 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 65 selfloop transitions, 37 changer transitions 0/110 dead transitions. [2024-06-28 00:02:32,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 110 transitions, 1085 flow [2024-06-28 00:02:32,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-28 00:02:32,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-28 00:02:32,951 INFO L175 Difference]: Start difference. First operand has 81 places, 81 transitions, 735 flow. Second operand 6 states and 141 transitions. [2024-06-28 00:02:32,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 110 transitions, 1085 flow [2024-06-28 00:02:32,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 110 transitions, 1001 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 00:02:32,965 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 834 flow [2024-06-28 00:02:32,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=834, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2024-06-28 00:02:32,966 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-28 00:02:32,966 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 834 flow [2024-06-28 00:02:32,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:32,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:32,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:32,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:02:32,967 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)] === [2024-06-28 00:02:32,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:32,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1074038030, now seen corresponding path program 1 times [2024-06-28 00:02:32,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:32,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998602217] [2024-06-28 00:02:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:32,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:33,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:33,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998602217] [2024-06-28 00:02:33,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998602217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:33,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:33,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:02:33,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522741005] [2024-06-28 00:02:33,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:33,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:02:33,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:33,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:02:33,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:02:33,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-28 00:02:33,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 834 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:33,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:33,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-28 00:02:33,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:33,946 INFO L124 PetriNetUnfolderBase]: 1038/1839 cut-off events. [2024-06-28 00:02:33,947 INFO L125 PetriNetUnfolderBase]: For 14230/14234 co-relation queries the response was YES. [2024-06-28 00:02:33,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7821 conditions, 1839 events. 1038/1839 cut-off events. For 14230/14234 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10951 event pairs, 256 based on Foata normal form. 16/1842 useless extension candidates. Maximal degree in co-relation 7780. Up to 1196 conditions per place. [2024-06-28 00:02:33,961 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 71 selfloop transitions, 33 changer transitions 0/112 dead transitions. [2024-06-28 00:02:33,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 1150 flow [2024-06-28 00:02:33,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-28 00:02:33,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-28 00:02:33,962 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 834 flow. Second operand 6 states and 139 transitions. [2024-06-28 00:02:33,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 1150 flow [2024-06-28 00:02:33,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 112 transitions, 1103 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-28 00:02:33,980 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 887 flow [2024-06-28 00:02:33,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=887, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2024-06-28 00:02:33,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-28 00:02:33,981 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 887 flow [2024-06-28 00:02:33,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:33,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:33,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:33,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:02:33,982 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)] === [2024-06-28 00:02:33,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:33,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1946610738, now seen corresponding path program 2 times [2024-06-28 00:02:33,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:33,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401463882] [2024-06-28 00:02:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:33,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:34,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:34,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401463882] [2024-06-28 00:02:34,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401463882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:34,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:34,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:02:34,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687379965] [2024-06-28 00:02:34,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:34,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:02:34,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:34,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:02:34,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:02:34,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-28 00:02:34,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 887 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:34,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:34,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-28 00:02:34,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:35,295 INFO L124 PetriNetUnfolderBase]: 1034/1853 cut-off events. [2024-06-28 00:02:35,295 INFO L125 PetriNetUnfolderBase]: For 14721/14721 co-relation queries the response was YES. [2024-06-28 00:02:35,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7783 conditions, 1853 events. 1034/1853 cut-off events. For 14721/14721 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11076 event pairs, 91 based on Foata normal form. 24/1871 useless extension candidates. Maximal degree in co-relation 7740. Up to 796 conditions per place. [2024-06-28 00:02:35,309 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 70 selfloop transitions, 46 changer transitions 0/124 dead transitions. [2024-06-28 00:02:35,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 124 transitions, 1238 flow [2024-06-28 00:02:35,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:02:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:02:35,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-28 00:02:35,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-28 00:02:35,311 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 887 flow. Second operand 8 states and 182 transitions. [2024-06-28 00:02:35,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 124 transitions, 1238 flow [2024-06-28 00:02:35,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 124 transitions, 1161 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:02:35,332 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 916 flow [2024-06-28 00:02:35,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=916, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2024-06-28 00:02:35,333 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2024-06-28 00:02:35,334 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 916 flow [2024-06-28 00:02:35,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:35,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:35,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:35,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:02:35,334 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:35,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2133031907, now seen corresponding path program 1 times [2024-06-28 00:02:35,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:35,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614834825] [2024-06-28 00:02:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:35,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:35,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:35,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614834825] [2024-06-28 00:02:35,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614834825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:35,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:35,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:35,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951228356] [2024-06-28 00:02:35,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:35,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:35,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:35,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:35,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:35,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:02:35,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 916 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:35,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:35,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:02:35,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:35,844 INFO L124 PetriNetUnfolderBase]: 1266/2167 cut-off events. [2024-06-28 00:02:35,845 INFO L125 PetriNetUnfolderBase]: For 17369/17373 co-relation queries the response was YES. [2024-06-28 00:02:35,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9319 conditions, 2167 events. 1266/2167 cut-off events. For 17369/17373 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12615 event pairs, 547 based on Foata normal form. 7/2166 useless extension candidates. Maximal degree in co-relation 9273. Up to 1941 conditions per place. [2024-06-28 00:02:35,861 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 80 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2024-06-28 00:02:35,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 100 transitions, 1153 flow [2024-06-28 00:02:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-28 00:02:35,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-28 00:02:35,863 INFO L175 Difference]: Start difference. First operand has 94 places, 88 transitions, 916 flow. Second operand 6 states and 103 transitions. [2024-06-28 00:02:35,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 100 transitions, 1153 flow [2024-06-28 00:02:35,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 100 transitions, 1017 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 00:02:35,885 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 849 flow [2024-06-28 00:02:35,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=849, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2024-06-28 00:02:35,886 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-28 00:02:35,886 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 849 flow [2024-06-28 00:02:35,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:35,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:35,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:35,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:02:35,887 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:35,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:35,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1855375941, now seen corresponding path program 2 times [2024-06-28 00:02:35,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:35,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102901955] [2024-06-28 00:02:35,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:35,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:36,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:36,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102901955] [2024-06-28 00:02:36,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102901955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:36,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:36,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:36,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468911576] [2024-06-28 00:02:36,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:36,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:36,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:36,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:36,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:36,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:02:36,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 849 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:36,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:36,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:02:36,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:36,475 INFO L124 PetriNetUnfolderBase]: 1258/2156 cut-off events. [2024-06-28 00:02:36,476 INFO L125 PetriNetUnfolderBase]: For 14878/14882 co-relation queries the response was YES. [2024-06-28 00:02:36,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8732 conditions, 2156 events. 1258/2156 cut-off events. For 14878/14882 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12564 event pairs, 547 based on Foata normal form. 7/2155 useless extension candidates. Maximal degree in co-relation 8685. Up to 1917 conditions per place. [2024-06-28 00:02:36,492 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 83 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-28 00:02:36,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 1099 flow [2024-06-28 00:02:36,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-28 00:02:36,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 00:02:36,494 INFO L175 Difference]: Start difference. First operand has 95 places, 91 transitions, 849 flow. Second operand 6 states and 108 transitions. [2024-06-28 00:02:36,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 1099 flow [2024-06-28 00:02:36,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 105 transitions, 1065 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 00:02:36,513 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 878 flow [2024-06-28 00:02:36,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=878, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2024-06-28 00:02:36,514 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-28 00:02:36,514 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 878 flow [2024-06-28 00:02:36,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:36,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:36,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:36,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:02:36,515 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:36,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:36,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1546350907, now seen corresponding path program 1 times [2024-06-28 00:02:36,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:36,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382337875] [2024-06-28 00:02:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:36,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:36,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:36,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382337875] [2024-06-28 00:02:36,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382337875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:36,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:36,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:02:36,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500747621] [2024-06-28 00:02:36,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:36,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:02:36,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:36,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:02:36,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:02:36,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:36,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 878 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:36,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:36,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:36,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:36,960 INFO L124 PetriNetUnfolderBase]: 1263/2169 cut-off events. [2024-06-28 00:02:36,960 INFO L125 PetriNetUnfolderBase]: For 16694/16694 co-relation queries the response was YES. [2024-06-28 00:02:36,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8864 conditions, 2169 events. 1263/2169 cut-off events. For 16694/16694 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12739 event pairs, 736 based on Foata normal form. 1/2161 useless extension candidates. Maximal degree in co-relation 8816. Up to 1951 conditions per place. [2024-06-28 00:02:36,977 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 94 selfloop transitions, 15 changer transitions 0/116 dead transitions. [2024-06-28 00:02:36,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 116 transitions, 1237 flow [2024-06-28 00:02:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:02:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:02:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-28 00:02:36,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535 [2024-06-28 00:02:36,978 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 878 flow. Second operand 5 states and 107 transitions. [2024-06-28 00:02:36,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 116 transitions, 1237 flow [2024-06-28 00:02:36,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 116 transitions, 1197 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 00:02:36,995 INFO L231 Difference]: Finished difference. Result has 101 places, 104 transitions, 973 flow [2024-06-28 00:02:36,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=973, PETRI_PLACES=101, PETRI_TRANSITIONS=104} [2024-06-28 00:02:36,995 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-28 00:02:36,995 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 104 transitions, 973 flow [2024-06-28 00:02:36,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:36,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:36,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:36,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:02:36,996 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:36,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash 357323947, now seen corresponding path program 2 times [2024-06-28 00:02:36,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:36,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313527622] [2024-06-28 00:02:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:36,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:37,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:37,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313527622] [2024-06-28 00:02:37,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313527622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:37,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:37,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:02:37,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608507252] [2024-06-28 00:02:37,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:37,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:02:37,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:02:37,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:02:37,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:37,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 104 transitions, 973 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:37,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:37,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:37,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:37,410 INFO L124 PetriNetUnfolderBase]: 1260/2165 cut-off events. [2024-06-28 00:02:37,410 INFO L125 PetriNetUnfolderBase]: For 18062/18062 co-relation queries the response was YES. [2024-06-28 00:02:37,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9128 conditions, 2165 events. 1260/2165 cut-off events. For 18062/18062 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12752 event pairs, 737 based on Foata normal form. 1/2156 useless extension candidates. Maximal degree in co-relation 9077. Up to 1960 conditions per place. [2024-06-28 00:02:37,425 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 95 selfloop transitions, 11 changer transitions 0/113 dead transitions. [2024-06-28 00:02:37,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 113 transitions, 1216 flow [2024-06-28 00:02:37,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:02:37,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:02:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-28 00:02:37,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-06-28 00:02:37,427 INFO L175 Difference]: Start difference. First operand has 101 places, 104 transitions, 973 flow. Second operand 5 states and 101 transitions. [2024-06-28 00:02:37,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 113 transitions, 1216 flow [2024-06-28 00:02:37,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 113 transitions, 1202 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-28 00:02:37,447 INFO L231 Difference]: Finished difference. Result has 106 places, 105 transitions, 996 flow [2024-06-28 00:02:37,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=996, PETRI_PLACES=106, PETRI_TRANSITIONS=105} [2024-06-28 00:02:37,448 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-28 00:02:37,448 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 105 transitions, 996 flow [2024-06-28 00:02:37,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:37,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:37,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:37,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:02:37,449 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:37,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:37,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1324994521, now seen corresponding path program 1 times [2024-06-28 00:02:37,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:37,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494096511] [2024-06-28 00:02:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:37,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:37,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:37,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494096511] [2024-06-28 00:02:37,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494096511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:37,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:37,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:37,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684381325] [2024-06-28 00:02:37,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:37,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:37,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:37,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:37,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:37,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:02:37,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 105 transitions, 996 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:37,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:37,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:02:37,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:38,086 INFO L124 PetriNetUnfolderBase]: 1360/2328 cut-off events. [2024-06-28 00:02:38,086 INFO L125 PetriNetUnfolderBase]: For 22760/22768 co-relation queries the response was YES. [2024-06-28 00:02:38,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10081 conditions, 2328 events. 1360/2328 cut-off events. For 22760/22768 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 13726 event pairs, 383 based on Foata normal form. 17/2335 useless extension candidates. Maximal degree in co-relation 10026. Up to 1863 conditions per place. [2024-06-28 00:02:38,104 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 105 selfloop transitions, 38 changer transitions 0/149 dead transitions. [2024-06-28 00:02:38,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 149 transitions, 1539 flow [2024-06-28 00:02:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:02:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:02:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-28 00:02:38,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-28 00:02:38,106 INFO L175 Difference]: Start difference. First operand has 106 places, 105 transitions, 996 flow. Second operand 11 states and 195 transitions. [2024-06-28 00:02:38,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 149 transitions, 1539 flow [2024-06-28 00:02:38,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 149 transitions, 1514 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 00:02:38,171 INFO L231 Difference]: Finished difference. Result has 116 places, 113 transitions, 1147 flow [2024-06-28 00:02:38,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1147, PETRI_PLACES=116, PETRI_TRANSITIONS=113} [2024-06-28 00:02:38,172 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-28 00:02:38,172 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 1147 flow [2024-06-28 00:02:38,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:38,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:38,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:38,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:02:38,173 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:38,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:38,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1699807355, now seen corresponding path program 2 times [2024-06-28 00:02:38,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:38,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605000882] [2024-06-28 00:02:38,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:38,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:38,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:38,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605000882] [2024-06-28 00:02:38,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605000882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:38,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:38,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:38,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649554288] [2024-06-28 00:02:38,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:38,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:38,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:38,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:38,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:38,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:02:38,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 113 transitions, 1147 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:38,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:38,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:02:38,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:38,954 INFO L124 PetriNetUnfolderBase]: 1488/2542 cut-off events. [2024-06-28 00:02:38,954 INFO L125 PetriNetUnfolderBase]: For 29404/29408 co-relation queries the response was YES. [2024-06-28 00:02:38,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12089 conditions, 2542 events. 1488/2542 cut-off events. For 29404/29408 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15284 event pairs, 322 based on Foata normal form. 13/2545 useless extension candidates. Maximal degree in co-relation 12031. Up to 1932 conditions per place. [2024-06-28 00:02:38,977 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 109 selfloop transitions, 44 changer transitions 0/159 dead transitions. [2024-06-28 00:02:38,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 159 transitions, 1864 flow [2024-06-28 00:02:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:02:38,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:02:38,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 00:02:38,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-28 00:02:38,979 INFO L175 Difference]: Start difference. First operand has 116 places, 113 transitions, 1147 flow. Second operand 9 states and 159 transitions. [2024-06-28 00:02:38,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 159 transitions, 1864 flow [2024-06-28 00:02:39,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 159 transitions, 1757 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-28 00:02:39,017 INFO L231 Difference]: Finished difference. Result has 120 places, 124 transitions, 1310 flow [2024-06-28 00:02:39,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1310, PETRI_PLACES=120, PETRI_TRANSITIONS=124} [2024-06-28 00:02:39,018 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-28 00:02:39,018 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 124 transitions, 1310 flow [2024-06-28 00:02:39,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:39,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:39,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:39,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:02:39,019 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:39,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:39,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1670879705, now seen corresponding path program 3 times [2024-06-28 00:02:39,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:39,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807650892] [2024-06-28 00:02:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:39,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:39,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:39,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807650892] [2024-06-28 00:02:39,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807650892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:39,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:39,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:39,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887891779] [2024-06-28 00:02:39,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:39,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:39,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:39,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:39,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:39,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:02:39,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 124 transitions, 1310 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:39,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:39,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:02:39,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:39,751 INFO L124 PetriNetUnfolderBase]: 1462/2505 cut-off events. [2024-06-28 00:02:39,751 INFO L125 PetriNetUnfolderBase]: For 29536/29536 co-relation queries the response was YES. [2024-06-28 00:02:39,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11817 conditions, 2505 events. 1462/2505 cut-off events. For 29536/29536 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15006 event pairs, 308 based on Foata normal form. 11/2506 useless extension candidates. Maximal degree in co-relation 11758. Up to 1921 conditions per place. [2024-06-28 00:02:39,779 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 95 selfloop transitions, 43 changer transitions 0/144 dead transitions. [2024-06-28 00:02:39,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 144 transitions, 1722 flow [2024-06-28 00:02:39,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:02:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:02:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 00:02:39,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-28 00:02:39,782 INFO L175 Difference]: Start difference. First operand has 120 places, 124 transitions, 1310 flow. Second operand 7 states and 123 transitions. [2024-06-28 00:02:39,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 144 transitions, 1722 flow [2024-06-28 00:02:39,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 144 transitions, 1641 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-28 00:02:39,824 INFO L231 Difference]: Finished difference. Result has 124 places, 124 transitions, 1324 flow [2024-06-28 00:02:39,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=124, PETRI_TRANSITIONS=124} [2024-06-28 00:02:39,825 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-28 00:02:39,825 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 124 transitions, 1324 flow [2024-06-28 00:02:39,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:39,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:39,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:39,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:02:39,826 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:39,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:39,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1682078711, now seen corresponding path program 4 times [2024-06-28 00:02:39,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:39,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47332557] [2024-06-28 00:02:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:39,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:40,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:40,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47332557] [2024-06-28 00:02:40,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47332557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:40,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:40,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:40,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737264109] [2024-06-28 00:02:40,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:40,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:40,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:40,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:40,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:40,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:02:40,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 124 transitions, 1324 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:40,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:40,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:02:40,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:40,528 INFO L124 PetriNetUnfolderBase]: 1441/2475 cut-off events. [2024-06-28 00:02:40,528 INFO L125 PetriNetUnfolderBase]: For 29311/29311 co-relation queries the response was YES. [2024-06-28 00:02:40,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11422 conditions, 2475 events. 1441/2475 cut-off events. For 29311/29311 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14790 event pairs, 312 based on Foata normal form. 9/2474 useless extension candidates. Maximal degree in co-relation 11362. Up to 1839 conditions per place. [2024-06-28 00:02:40,547 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 94 selfloop transitions, 45 changer transitions 0/145 dead transitions. [2024-06-28 00:02:40,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 145 transitions, 1738 flow [2024-06-28 00:02:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:02:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:02:40,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 00:02:40,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-28 00:02:40,549 INFO L175 Difference]: Start difference. First operand has 124 places, 124 transitions, 1324 flow. Second operand 7 states and 127 transitions. [2024-06-28 00:02:40,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 145 transitions, 1738 flow [2024-06-28 00:02:40,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 145 transitions, 1652 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:02:40,585 INFO L231 Difference]: Finished difference. Result has 125 places, 124 transitions, 1334 flow [2024-06-28 00:02:40,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1334, PETRI_PLACES=125, PETRI_TRANSITIONS=124} [2024-06-28 00:02:40,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-28 00:02:40,586 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 124 transitions, 1334 flow [2024-06-28 00:02:40,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:40,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:40,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:40,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:02:40,586 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)] === [2024-06-28 00:02:40,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:40,587 INFO L85 PathProgramCache]: Analyzing trace with hash 692233079, now seen corresponding path program 1 times [2024-06-28 00:02:40,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:40,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105775012] [2024-06-28 00:02:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:40,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:40,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:40,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105775012] [2024-06-28 00:02:40,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105775012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:40,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:40,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:40,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044107617] [2024-06-28 00:02:40,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:40,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:40,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:40,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:40,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:41,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:41,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 124 transitions, 1334 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:41,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:41,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:41,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:41,408 INFO L124 PetriNetUnfolderBase]: 1488/2552 cut-off events. [2024-06-28 00:02:41,408 INFO L125 PetriNetUnfolderBase]: For 33049/33049 co-relation queries the response was YES. [2024-06-28 00:02:41,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11873 conditions, 2552 events. 1488/2552 cut-off events. For 33049/33049 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15554 event pairs, 807 based on Foata normal form. 5/2546 useless extension candidates. Maximal degree in co-relation 11812. Up to 2239 conditions per place. [2024-06-28 00:02:41,429 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 124 selfloop transitions, 21 changer transitions 0/152 dead transitions. [2024-06-28 00:02:41,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 152 transitions, 1786 flow [2024-06-28 00:02:41,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:02:41,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:02:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-28 00:02:41,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-28 00:02:41,433 INFO L175 Difference]: Start difference. First operand has 125 places, 124 transitions, 1334 flow. Second operand 7 states and 147 transitions. [2024-06-28 00:02:41,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 152 transitions, 1786 flow [2024-06-28 00:02:41,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 152 transitions, 1688 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:02:41,479 INFO L231 Difference]: Finished difference. Result has 128 places, 129 transitions, 1319 flow [2024-06-28 00:02:41,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1319, PETRI_PLACES=128, PETRI_TRANSITIONS=129} [2024-06-28 00:02:41,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-28 00:02:41,480 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 129 transitions, 1319 flow [2024-06-28 00:02:41,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:41,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:41,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:41,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:02:41,481 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)] === [2024-06-28 00:02:41,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:41,481 INFO L85 PathProgramCache]: Analyzing trace with hash -767341096, now seen corresponding path program 1 times [2024-06-28 00:02:41,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:41,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449152597] [2024-06-28 00:02:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:41,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:41,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:41,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449152597] [2024-06-28 00:02:41,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449152597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:41,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:41,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:41,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274923670] [2024-06-28 00:02:41,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:41,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:41,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:41,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:41,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:41,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:02:41,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 129 transitions, 1319 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:41,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:41,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:02:41,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:42,141 INFO L124 PetriNetUnfolderBase]: 1483/2547 cut-off events. [2024-06-28 00:02:42,141 INFO L125 PetriNetUnfolderBase]: For 32740/32740 co-relation queries the response was YES. [2024-06-28 00:02:42,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11902 conditions, 2547 events. 1483/2547 cut-off events. For 32740/32740 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15551 event pairs, 802 based on Foata normal form. 2/2538 useless extension candidates. Maximal degree in co-relation 11839. Up to 2289 conditions per place. [2024-06-28 00:02:42,164 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 120 selfloop transitions, 15 changer transitions 0/141 dead transitions. [2024-06-28 00:02:42,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 141 transitions, 1635 flow [2024-06-28 00:02:42,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:42,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 00:02:42,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 00:02:42,165 INFO L175 Difference]: Start difference. First operand has 128 places, 129 transitions, 1319 flow. Second operand 6 states and 110 transitions. [2024-06-28 00:02:42,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 141 transitions, 1635 flow [2024-06-28 00:02:42,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 141 transitions, 1612 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 00:02:42,205 INFO L231 Difference]: Finished difference. Result has 131 places, 131 transitions, 1357 flow [2024-06-28 00:02:42,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1357, PETRI_PLACES=131, PETRI_TRANSITIONS=131} [2024-06-28 00:02:42,206 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-28 00:02:42,206 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 131 transitions, 1357 flow [2024-06-28 00:02:42,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:42,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:42,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:42,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:02:42,206 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)] === [2024-06-28 00:02:42,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:42,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1681893796, now seen corresponding path program 2 times [2024-06-28 00:02:42,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:42,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603699227] [2024-06-28 00:02:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:42,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:42,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:42,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603699227] [2024-06-28 00:02:42,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603699227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:42,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:42,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:42,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727751500] [2024-06-28 00:02:42,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:42,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:42,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:42,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:42,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:42,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:42,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 131 transitions, 1357 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:42,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:42,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:42,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:42,856 INFO L124 PetriNetUnfolderBase]: 1478/2538 cut-off events. [2024-06-28 00:02:42,856 INFO L125 PetriNetUnfolderBase]: For 34382/34382 co-relation queries the response was YES. [2024-06-28 00:02:42,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12014 conditions, 2538 events. 1478/2538 cut-off events. For 34382/34382 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15457 event pairs, 802 based on Foata normal form. 2/2529 useless extension candidates. Maximal degree in co-relation 11949. Up to 2290 conditions per place. [2024-06-28 00:02:42,879 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 123 selfloop transitions, 12 changer transitions 0/142 dead transitions. [2024-06-28 00:02:42,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 142 transitions, 1672 flow [2024-06-28 00:02:42,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:02:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:02:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-28 00:02:42,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-28 00:02:42,880 INFO L175 Difference]: Start difference. First operand has 131 places, 131 transitions, 1357 flow. Second operand 5 states and 102 transitions. [2024-06-28 00:02:42,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 142 transitions, 1672 flow [2024-06-28 00:02:42,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 142 transitions, 1639 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 00:02:42,924 INFO L231 Difference]: Finished difference. Result has 132 places, 133 transitions, 1378 flow [2024-06-28 00:02:42,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1378, PETRI_PLACES=132, PETRI_TRANSITIONS=133} [2024-06-28 00:02:42,925 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-28 00:02:42,925 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 133 transitions, 1378 flow [2024-06-28 00:02:42,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:42,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:42,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:42,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:02:42,926 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)] === [2024-06-28 00:02:42,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:42,926 INFO L85 PathProgramCache]: Analyzing trace with hash 898892099, now seen corresponding path program 2 times [2024-06-28 00:02:42,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:42,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72569124] [2024-06-28 00:02:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:42,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:43,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:43,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72569124] [2024-06-28 00:02:43,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72569124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:43,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:43,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:43,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263535054] [2024-06-28 00:02:43,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:43,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:43,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:43,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:43,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:43,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:43,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 133 transitions, 1378 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:43,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:43,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:43,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:43,745 INFO L124 PetriNetUnfolderBase]: 1470/2529 cut-off events. [2024-06-28 00:02:43,745 INFO L125 PetriNetUnfolderBase]: For 36002/36002 co-relation queries the response was YES. [2024-06-28 00:02:43,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12022 conditions, 2529 events. 1470/2529 cut-off events. For 36002/36002 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15424 event pairs, 804 based on Foata normal form. 3/2521 useless extension candidates. Maximal degree in co-relation 11958. Up to 2266 conditions per place. [2024-06-28 00:02:43,766 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 125 selfloop transitions, 14 changer transitions 0/146 dead transitions. [2024-06-28 00:02:43,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 146 transitions, 1706 flow [2024-06-28 00:02:43,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-28 00:02:43,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2024-06-28 00:02:43,768 INFO L175 Difference]: Start difference. First operand has 132 places, 133 transitions, 1378 flow. Second operand 6 states and 119 transitions. [2024-06-28 00:02:43,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 146 transitions, 1706 flow [2024-06-28 00:02:43,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 146 transitions, 1681 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 00:02:43,847 INFO L231 Difference]: Finished difference. Result has 135 places, 135 transitions, 1406 flow [2024-06-28 00:02:43,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1406, PETRI_PLACES=135, PETRI_TRANSITIONS=135} [2024-06-28 00:02:43,848 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-28 00:02:43,848 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 135 transitions, 1406 flow [2024-06-28 00:02:43,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:43,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:43,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:43,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:02:43,848 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)] === [2024-06-28 00:02:43,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:43,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1550877436, now seen corresponding path program 1 times [2024-06-28 00:02:43,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:43,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879906383] [2024-06-28 00:02:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:43,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:44,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:44,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879906383] [2024-06-28 00:02:44,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879906383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:44,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:44,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:44,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724221943] [2024-06-28 00:02:44,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:44,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:44,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:44,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:44,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:02:44,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 135 transitions, 1406 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:44,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:44,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:02:44,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:44,397 INFO L124 PetriNetUnfolderBase]: 1390/2408 cut-off events. [2024-06-28 00:02:44,397 INFO L125 PetriNetUnfolderBase]: For 36173/36219 co-relation queries the response was YES. [2024-06-28 00:02:44,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11449 conditions, 2408 events. 1390/2408 cut-off events. For 36173/36219 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14568 event pairs, 279 based on Foata normal form. 45/2441 useless extension candidates. Maximal degree in co-relation 11383. Up to 1816 conditions per place. [2024-06-28 00:02:44,416 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 92 selfloop transitions, 42 changer transitions 0/147 dead transitions. [2024-06-28 00:02:44,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 147 transitions, 1726 flow [2024-06-28 00:02:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-28 00:02:44,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 00:02:44,417 INFO L175 Difference]: Start difference. First operand has 135 places, 135 transitions, 1406 flow. Second operand 6 states and 108 transitions. [2024-06-28 00:02:44,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 147 transitions, 1726 flow [2024-06-28 00:02:44,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 147 transitions, 1697 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-28 00:02:44,460 INFO L231 Difference]: Finished difference. Result has 137 places, 135 transitions, 1488 flow [2024-06-28 00:02:44,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1488, PETRI_PLACES=137, PETRI_TRANSITIONS=135} [2024-06-28 00:02:44,461 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-28 00:02:44,461 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 135 transitions, 1488 flow [2024-06-28 00:02:44,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:44,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:44,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:44,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:02:44,462 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)] === [2024-06-28 00:02:44,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:44,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1925305004, now seen corresponding path program 1 times [2024-06-28 00:02:44,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:44,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630076118] [2024-06-28 00:02:44,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:44,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:44,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:44,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630076118] [2024-06-28 00:02:44,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630076118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:44,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:44,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:44,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737518896] [2024-06-28 00:02:44,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:44,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:44,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:44,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:44,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:44,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:44,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 135 transitions, 1488 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:44,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:44,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:44,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:45,042 INFO L124 PetriNetUnfolderBase]: 1481/2540 cut-off events. [2024-06-28 00:02:45,044 INFO L125 PetriNetUnfolderBase]: For 38249/38255 co-relation queries the response was YES. [2024-06-28 00:02:45,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12435 conditions, 2540 events. 1481/2540 cut-off events. For 38249/38255 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15353 event pairs, 587 based on Foata normal form. 7/2538 useless extension candidates. Maximal degree in co-relation 12368. Up to 2254 conditions per place. [2024-06-28 00:02:45,061 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 122 selfloop transitions, 31 changer transitions 0/160 dead transitions. [2024-06-28 00:02:45,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 160 transitions, 2023 flow [2024-06-28 00:02:45,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:45,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:45,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-28 00:02:45,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-28 00:02:45,062 INFO L175 Difference]: Start difference. First operand has 137 places, 135 transitions, 1488 flow. Second operand 6 states and 126 transitions. [2024-06-28 00:02:45,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 160 transitions, 2023 flow [2024-06-28 00:02:45,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 160 transitions, 1905 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-28 00:02:45,109 INFO L231 Difference]: Finished difference. Result has 137 places, 147 transitions, 1621 flow [2024-06-28 00:02:45,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1621, PETRI_PLACES=137, PETRI_TRANSITIONS=147} [2024-06-28 00:02:45,110 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-28 00:02:45,110 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 147 transitions, 1621 flow [2024-06-28 00:02:45,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:45,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:45,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:45,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:02:45,111 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)] === [2024-06-28 00:02:45,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:45,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1144238852, now seen corresponding path program 2 times [2024-06-28 00:02:45,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:45,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931480257] [2024-06-28 00:02:45,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:45,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:45,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:45,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931480257] [2024-06-28 00:02:45,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931480257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:45,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:45,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:45,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930920015] [2024-06-28 00:02:45,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:45,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:45,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:45,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:45,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:45,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:45,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 147 transitions, 1621 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:45,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:45,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:45,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:45,611 INFO L124 PetriNetUnfolderBase]: 1478/2537 cut-off events. [2024-06-28 00:02:45,612 INFO L125 PetriNetUnfolderBase]: For 33518/33524 co-relation queries the response was YES. [2024-06-28 00:02:45,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12285 conditions, 2537 events. 1478/2537 cut-off events. For 33518/33524 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15314 event pairs, 587 based on Foata normal form. 7/2534 useless extension candidates. Maximal degree in co-relation 12219. Up to 2275 conditions per place. [2024-06-28 00:02:45,635 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 129 selfloop transitions, 19 changer transitions 0/155 dead transitions. [2024-06-28 00:02:45,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 155 transitions, 1941 flow [2024-06-28 00:02:45,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:02:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:02:45,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-28 00:02:45,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-28 00:02:45,636 INFO L175 Difference]: Start difference. First operand has 137 places, 147 transitions, 1621 flow. Second operand 5 states and 104 transitions. [2024-06-28 00:02:45,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 155 transitions, 1941 flow [2024-06-28 00:02:45,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 155 transitions, 1882 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-28 00:02:45,692 INFO L231 Difference]: Finished difference. Result has 140 places, 147 transitions, 1610 flow [2024-06-28 00:02:45,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1610, PETRI_PLACES=140, PETRI_TRANSITIONS=147} [2024-06-28 00:02:45,693 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-28 00:02:45,694 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 147 transitions, 1610 flow [2024-06-28 00:02:45,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:45,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:45,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:45,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:02:45,694 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)] === [2024-06-28 00:02:45,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:45,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1272577290, now seen corresponding path program 3 times [2024-06-28 00:02:45,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:45,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529160004] [2024-06-28 00:02:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:45,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:45,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:45,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529160004] [2024-06-28 00:02:45,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529160004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:45,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:45,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:45,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130757956] [2024-06-28 00:02:45,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:45,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:45,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:45,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:45,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:45,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:45,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 147 transitions, 1610 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:45,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:45,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:45,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:46,300 INFO L124 PetriNetUnfolderBase]: 1483/2547 cut-off events. [2024-06-28 00:02:46,301 INFO L125 PetriNetUnfolderBase]: For 33651/33657 co-relation queries the response was YES. [2024-06-28 00:02:46,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12340 conditions, 2547 events. 1483/2547 cut-off events. For 33651/33657 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15490 event pairs, 587 based on Foata normal form. 7/2543 useless extension candidates. Maximal degree in co-relation 12273. Up to 2264 conditions per place. [2024-06-28 00:02:46,319 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 139 selfloop transitions, 19 changer transitions 0/165 dead transitions. [2024-06-28 00:02:46,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 165 transitions, 2016 flow [2024-06-28 00:02:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:46,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-28 00:02:46,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-28 00:02:46,321 INFO L175 Difference]: Start difference. First operand has 140 places, 147 transitions, 1610 flow. Second operand 6 states and 125 transitions. [2024-06-28 00:02:46,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 165 transitions, 2016 flow [2024-06-28 00:02:46,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 165 transitions, 1980 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 00:02:46,368 INFO L231 Difference]: Finished difference. Result has 143 places, 150 transitions, 1664 flow [2024-06-28 00:02:46,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1664, PETRI_PLACES=143, PETRI_TRANSITIONS=150} [2024-06-28 00:02:46,369 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-28 00:02:46,369 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 150 transitions, 1664 flow [2024-06-28 00:02:46,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:46,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:46,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:46,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:02:46,370 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)] === [2024-06-28 00:02:46,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:46,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2055310608, now seen corresponding path program 4 times [2024-06-28 00:02:46,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:46,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585326941] [2024-06-28 00:02:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:46,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:46,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:46,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585326941] [2024-06-28 00:02:46,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585326941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:46,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:46,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:46,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171541644] [2024-06-28 00:02:46,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:46,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:46,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:46,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:46,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:46,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:46,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 150 transitions, 1664 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:46,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:46,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:46,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:46,861 INFO L124 PetriNetUnfolderBase]: 1488/2550 cut-off events. [2024-06-28 00:02:46,861 INFO L125 PetriNetUnfolderBase]: For 35834/35840 co-relation queries the response was YES. [2024-06-28 00:02:46,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12670 conditions, 2550 events. 1488/2550 cut-off events. For 35834/35840 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15435 event pairs, 584 based on Foata normal form. 7/2548 useless extension candidates. Maximal degree in co-relation 12602. Up to 2241 conditions per place. [2024-06-28 00:02:46,883 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 124 selfloop transitions, 41 changer transitions 0/172 dead transitions. [2024-06-28 00:02:46,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 172 transitions, 2202 flow [2024-06-28 00:02:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-28 00:02:46,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-28 00:02:46,885 INFO L175 Difference]: Start difference. First operand has 143 places, 150 transitions, 1664 flow. Second operand 6 states and 126 transitions. [2024-06-28 00:02:46,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 172 transitions, 2202 flow [2024-06-28 00:02:46,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 172 transitions, 2096 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 00:02:46,938 INFO L231 Difference]: Finished difference. Result has 145 places, 159 transitions, 1783 flow [2024-06-28 00:02:46,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1783, PETRI_PLACES=145, PETRI_TRANSITIONS=159} [2024-06-28 00:02:46,939 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-28 00:02:46,939 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 159 transitions, 1783 flow [2024-06-28 00:02:46,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:46,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:46,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:46,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:02:46,940 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)] === [2024-06-28 00:02:46,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:46,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1628384790, now seen corresponding path program 5 times [2024-06-28 00:02:46,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:46,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009145333] [2024-06-28 00:02:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:46,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:47,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:47,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009145333] [2024-06-28 00:02:47,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009145333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:47,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:47,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:47,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815113113] [2024-06-28 00:02:47,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:47,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:47,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:47,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:47,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:47,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:47,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 159 transitions, 1783 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:47,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:47,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:47,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:47,591 INFO L124 PetriNetUnfolderBase]: 1493/2554 cut-off events. [2024-06-28 00:02:47,591 INFO L125 PetriNetUnfolderBase]: For 38205/38211 co-relation queries the response was YES. [2024-06-28 00:02:47,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12972 conditions, 2554 events. 1493/2554 cut-off events. For 38205/38211 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15408 event pairs, 585 based on Foata normal form. 7/2551 useless extension candidates. Maximal degree in co-relation 12903. Up to 2286 conditions per place. [2024-06-28 00:02:47,617 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 138 selfloop transitions, 27 changer transitions 0/172 dead transitions. [2024-06-28 00:02:47,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 172 transitions, 2249 flow [2024-06-28 00:02:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-28 00:02:47,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-06-28 00:02:47,618 INFO L175 Difference]: Start difference. First operand has 145 places, 159 transitions, 1783 flow. Second operand 6 states and 121 transitions. [2024-06-28 00:02:47,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 172 transitions, 2249 flow [2024-06-28 00:02:47,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 172 transitions, 2173 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-28 00:02:47,687 INFO L231 Difference]: Finished difference. Result has 149 places, 162 transitions, 1821 flow [2024-06-28 00:02:47,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1821, PETRI_PLACES=149, PETRI_TRANSITIONS=162} [2024-06-28 00:02:47,687 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-28 00:02:47,687 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 162 transitions, 1821 flow [2024-06-28 00:02:47,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:47,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:47,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:47,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:02:47,688 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:47,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:47,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1123546162, now seen corresponding path program 6 times [2024-06-28 00:02:47,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:47,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898931826] [2024-06-28 00:02:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:47,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:47,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:47,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898931826] [2024-06-28 00:02:47,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898931826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:47,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:47,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:02:47,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939339050] [2024-06-28 00:02:47,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:47,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:02:47,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:47,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:02:47,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:02:47,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:47,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 162 transitions, 1821 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:47,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:47,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:47,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:48,168 INFO L124 PetriNetUnfolderBase]: 1490/2554 cut-off events. [2024-06-28 00:02:48,168 INFO L125 PetriNetUnfolderBase]: For 37194/37200 co-relation queries the response was YES. [2024-06-28 00:02:48,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12750 conditions, 2554 events. 1490/2554 cut-off events. For 37194/37200 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15455 event pairs, 581 based on Foata normal form. 7/2551 useless extension candidates. Maximal degree in co-relation 12679. Up to 2292 conditions per place. [2024-06-28 00:02:48,190 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 145 selfloop transitions, 19 changer transitions 0/171 dead transitions. [2024-06-28 00:02:48,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 171 transitions, 2175 flow [2024-06-28 00:02:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-28 00:02:48,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2024-06-28 00:02:48,191 INFO L175 Difference]: Start difference. First operand has 149 places, 162 transitions, 1821 flow. Second operand 6 states and 119 transitions. [2024-06-28 00:02:48,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 171 transitions, 2175 flow [2024-06-28 00:02:48,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 171 transitions, 2048 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-28 00:02:48,247 INFO L231 Difference]: Finished difference. Result has 151 places, 162 transitions, 1738 flow [2024-06-28 00:02:48,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1738, PETRI_PLACES=151, PETRI_TRANSITIONS=162} [2024-06-28 00:02:48,248 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-28 00:02:48,249 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 162 transitions, 1738 flow [2024-06-28 00:02:48,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:48,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:48,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:48,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:02:48,249 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:48,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1280203786, now seen corresponding path program 1 times [2024-06-28 00:02:48,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:48,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110937181] [2024-06-28 00:02:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:48,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:48,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:48,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110937181] [2024-06-28 00:02:48,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110937181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:48,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:48,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:48,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983551426] [2024-06-28 00:02:48,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:48,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:48,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:48,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:48,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:48,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:48,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 162 transitions, 1738 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:48,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:48,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:48,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:49,197 INFO L124 PetriNetUnfolderBase]: 1556/2675 cut-off events. [2024-06-28 00:02:49,197 INFO L125 PetriNetUnfolderBase]: For 46599/46605 co-relation queries the response was YES. [2024-06-28 00:02:49,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13249 conditions, 2675 events. 1556/2675 cut-off events. For 46599/46605 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16356 event pairs, 559 based on Foata normal form. 24/2695 useless extension candidates. Maximal degree in co-relation 13178. Up to 2204 conditions per place. [2024-06-28 00:02:49,224 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 162 selfloop transitions, 24 changer transitions 0/193 dead transitions. [2024-06-28 00:02:49,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 193 transitions, 2262 flow [2024-06-28 00:02:49,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:02:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:02:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 00:02:49,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-28 00:02:49,248 INFO L175 Difference]: Start difference. First operand has 151 places, 162 transitions, 1738 flow. Second operand 7 states and 150 transitions. [2024-06-28 00:02:49,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 193 transitions, 2262 flow [2024-06-28 00:02:49,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 193 transitions, 2169 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 00:02:49,322 INFO L231 Difference]: Finished difference. Result has 153 places, 167 transitions, 1760 flow [2024-06-28 00:02:49,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1760, PETRI_PLACES=153, PETRI_TRANSITIONS=167} [2024-06-28 00:02:49,323 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-28 00:02:49,323 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 167 transitions, 1760 flow [2024-06-28 00:02:49,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:49,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:49,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:49,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:02:49,324 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:49,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:49,324 INFO L85 PathProgramCache]: Analyzing trace with hash -20078852, now seen corresponding path program 2 times [2024-06-28 00:02:49,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:49,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324237169] [2024-06-28 00:02:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:49,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:49,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:49,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324237169] [2024-06-28 00:02:49,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324237169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:49,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:49,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:49,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206886207] [2024-06-28 00:02:49,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:49,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:49,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:49,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:49,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:49,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:49,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 167 transitions, 1760 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:49,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:49,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:49,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:50,288 INFO L124 PetriNetUnfolderBase]: 1622/2789 cut-off events. [2024-06-28 00:02:50,288 INFO L125 PetriNetUnfolderBase]: For 49996/49996 co-relation queries the response was YES. [2024-06-28 00:02:50,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14197 conditions, 2789 events. 1622/2789 cut-off events. For 49996/49996 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17278 event pairs, 812 based on Foata normal form. 9/2794 useless extension candidates. Maximal degree in co-relation 14125. Up to 2291 conditions per place. [2024-06-28 00:02:50,311 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 168 selfloop transitions, 26 changer transitions 0/201 dead transitions. [2024-06-28 00:02:50,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 201 transitions, 2383 flow [2024-06-28 00:02:50,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:02:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:02:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-28 00:02:50,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528125 [2024-06-28 00:02:50,312 INFO L175 Difference]: Start difference. First operand has 153 places, 167 transitions, 1760 flow. Second operand 8 states and 169 transitions. [2024-06-28 00:02:50,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 201 transitions, 2383 flow [2024-06-28 00:02:50,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 201 transitions, 2321 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 00:02:50,375 INFO L231 Difference]: Finished difference. Result has 158 places, 170 transitions, 1802 flow [2024-06-28 00:02:50,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1802, PETRI_PLACES=158, PETRI_TRANSITIONS=170} [2024-06-28 00:02:50,376 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-28 00:02:50,376 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 170 transitions, 1802 flow [2024-06-28 00:02:50,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:50,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:50,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:50,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:02:50,377 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:50,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:50,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1628139518, now seen corresponding path program 1 times [2024-06-28 00:02:50,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:50,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422843345] [2024-06-28 00:02:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:50,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:50,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:50,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422843345] [2024-06-28 00:02:50,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422843345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:50,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:50,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:50,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387009315] [2024-06-28 00:02:50,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:50,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:50,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:50,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:50,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:50,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:02:50,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 170 transitions, 1802 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:50,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:50,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:02:50,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:51,380 INFO L124 PetriNetUnfolderBase]: 1617/2779 cut-off events. [2024-06-28 00:02:51,380 INFO L125 PetriNetUnfolderBase]: For 47735/47735 co-relation queries the response was YES. [2024-06-28 00:02:51,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14185 conditions, 2779 events. 1617/2779 cut-off events. For 47735/47735 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17235 event pairs, 804 based on Foata normal form. 2/2777 useless extension candidates. Maximal degree in co-relation 14110. Up to 2469 conditions per place. [2024-06-28 00:02:51,400 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 159 selfloop transitions, 20 changer transitions 0/185 dead transitions. [2024-06-28 00:02:51,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 185 transitions, 2224 flow [2024-06-28 00:02:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:02:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:02:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 00:02:51,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-28 00:02:51,401 INFO L175 Difference]: Start difference. First operand has 158 places, 170 transitions, 1802 flow. Second operand 7 states and 127 transitions. [2024-06-28 00:02:51,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 185 transitions, 2224 flow [2024-06-28 00:02:51,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 185 transitions, 2195 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 00:02:51,471 INFO L231 Difference]: Finished difference. Result has 162 places, 172 transitions, 1847 flow [2024-06-28 00:02:51,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1847, PETRI_PLACES=162, PETRI_TRANSITIONS=172} [2024-06-28 00:02:51,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-28 00:02:51,472 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 172 transitions, 1847 flow [2024-06-28 00:02:51,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:51,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:51,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:51,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:02:51,473 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:51,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:51,473 INFO L85 PathProgramCache]: Analyzing trace with hash -599106022, now seen corresponding path program 3 times [2024-06-28 00:02:51,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:51,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339543893] [2024-06-28 00:02:51,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:51,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:51,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:51,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339543893] [2024-06-28 00:02:51,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339543893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:51,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:51,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:51,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935831873] [2024-06-28 00:02:51,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:51,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:51,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:51,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:51,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:51,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:51,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 172 transitions, 1847 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:51,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:51,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:51,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:52,324 INFO L124 PetriNetUnfolderBase]: 1596/2745 cut-off events. [2024-06-28 00:02:52,324 INFO L125 PetriNetUnfolderBase]: For 48680/48680 co-relation queries the response was YES. [2024-06-28 00:02:52,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13909 conditions, 2745 events. 1596/2745 cut-off events. For 48680/48680 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16955 event pairs, 807 based on Foata normal form. 9/2750 useless extension candidates. Maximal degree in co-relation 13832. Up to 2422 conditions per place. [2024-06-28 00:02:52,346 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 167 selfloop transitions, 15 changer transitions 0/189 dead transitions. [2024-06-28 00:02:52,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 189 transitions, 2288 flow [2024-06-28 00:02:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:02:52,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:02:52,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-28 00:02:52,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48928571428571427 [2024-06-28 00:02:52,347 INFO L175 Difference]: Start difference. First operand has 162 places, 172 transitions, 1847 flow. Second operand 7 states and 137 transitions. [2024-06-28 00:02:52,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 189 transitions, 2288 flow [2024-06-28 00:02:52,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 189 transitions, 2246 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:02:52,413 INFO L231 Difference]: Finished difference. Result has 164 places, 173 transitions, 1854 flow [2024-06-28 00:02:52,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1854, PETRI_PLACES=164, PETRI_TRANSITIONS=173} [2024-06-28 00:02:52,414 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-28 00:02:52,414 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 173 transitions, 1854 flow [2024-06-28 00:02:52,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:52,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:52,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:52,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:02:52,414 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:52,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:52,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2030827130, now seen corresponding path program 1 times [2024-06-28 00:02:52,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:52,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959391101] [2024-06-28 00:02:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:52,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:52,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:52,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959391101] [2024-06-28 00:02:52,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959391101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:52,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:52,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:02:52,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080322872] [2024-06-28 00:02:52,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:52,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:02:52,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:52,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:02:52,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:02:52,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:02:52,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 173 transitions, 1854 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:52,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:52,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:02:52,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:53,199 INFO L124 PetriNetUnfolderBase]: 1629/2789 cut-off events. [2024-06-28 00:02:53,199 INFO L125 PetriNetUnfolderBase]: For 47808/47814 co-relation queries the response was YES. [2024-06-28 00:02:53,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14401 conditions, 2789 events. 1629/2789 cut-off events. For 47808/47814 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17124 event pairs, 353 based on Foata normal form. 7/2786 useless extension candidates. Maximal degree in co-relation 14323. Up to 2145 conditions per place. [2024-06-28 00:02:53,223 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 142 selfloop transitions, 61 changer transitions 0/209 dead transitions. [2024-06-28 00:02:53,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 209 transitions, 2557 flow [2024-06-28 00:02:53,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:02:53,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:02:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-28 00:02:53,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 00:02:53,224 INFO L175 Difference]: Start difference. First operand has 164 places, 173 transitions, 1854 flow. Second operand 10 states and 175 transitions. [2024-06-28 00:02:53,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 209 transitions, 2557 flow [2024-06-28 00:02:53,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 209 transitions, 2525 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 00:02:53,319 INFO L231 Difference]: Finished difference. Result has 171 places, 183 transitions, 2122 flow [2024-06-28 00:02:53,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2122, PETRI_PLACES=171, PETRI_TRANSITIONS=183} [2024-06-28 00:02:53,320 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-28 00:02:53,320 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 183 transitions, 2122 flow [2024-06-28 00:02:53,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:53,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:53,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:53,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:02:53,321 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:53,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:53,321 INFO L85 PathProgramCache]: Analyzing trace with hash -282553684, now seen corresponding path program 2 times [2024-06-28 00:02:53,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:53,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307486014] [2024-06-28 00:02:53,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:53,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:53,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:53,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307486014] [2024-06-28 00:02:53,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307486014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:53,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:53,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:53,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67542679] [2024-06-28 00:02:53,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:53,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:53,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:53,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:53,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:53,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:53,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 183 transitions, 2122 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:53,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:53,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:53,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:53,934 INFO L124 PetriNetUnfolderBase]: 1634/2804 cut-off events. [2024-06-28 00:02:53,934 INFO L125 PetriNetUnfolderBase]: For 53338/53344 co-relation queries the response was YES. [2024-06-28 00:02:53,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15377 conditions, 2804 events. 1634/2804 cut-off events. For 53338/53344 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17219 event pairs, 359 based on Foata normal form. 7/2801 useless extension candidates. Maximal degree in co-relation 15296. Up to 2151 conditions per place. [2024-06-28 00:02:53,958 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 140 selfloop transitions, 63 changer transitions 0/210 dead transitions. [2024-06-28 00:02:53,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 210 transitions, 2743 flow [2024-06-28 00:02:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:02:53,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:02:53,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-28 00:02:53,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-28 00:02:53,959 INFO L175 Difference]: Start difference. First operand has 171 places, 183 transitions, 2122 flow. Second operand 8 states and 165 transitions. [2024-06-28 00:02:53,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 210 transitions, 2743 flow [2024-06-28 00:02:54,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 210 transitions, 2608 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-28 00:02:54,043 INFO L231 Difference]: Finished difference. Result has 174 places, 186 transitions, 2174 flow [2024-06-28 00:02:54,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2174, PETRI_PLACES=174, PETRI_TRANSITIONS=186} [2024-06-28 00:02:54,044 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-28 00:02:54,044 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 186 transitions, 2174 flow [2024-06-28 00:02:54,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:54,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:54,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:54,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:02:54,045 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:54,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:54,045 INFO L85 PathProgramCache]: Analyzing trace with hash 610692716, now seen corresponding path program 3 times [2024-06-28 00:02:54,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:54,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172123881] [2024-06-28 00:02:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:54,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:54,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:54,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172123881] [2024-06-28 00:02:54,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172123881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:54,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:54,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:54,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858458707] [2024-06-28 00:02:54,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:54,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:54,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:54,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:54,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:54,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:54,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 186 transitions, 2174 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:54,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:54,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:54,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:54,675 INFO L124 PetriNetUnfolderBase]: 1639/2818 cut-off events. [2024-06-28 00:02:54,675 INFO L125 PetriNetUnfolderBase]: For 55978/55984 co-relation queries the response was YES. [2024-06-28 00:02:54,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15665 conditions, 2818 events. 1639/2818 cut-off events. For 55978/55984 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17348 event pairs, 372 based on Foata normal form. 7/2816 useless extension candidates. Maximal degree in co-relation 15583. Up to 2197 conditions per place. [2024-06-28 00:02:54,701 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 151 selfloop transitions, 53 changer transitions 0/211 dead transitions. [2024-06-28 00:02:54,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 211 transitions, 2727 flow [2024-06-28 00:02:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:02:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:02:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 00:02:54,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-28 00:02:54,706 INFO L175 Difference]: Start difference. First operand has 174 places, 186 transitions, 2174 flow. Second operand 8 states and 159 transitions. [2024-06-28 00:02:54,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 211 transitions, 2727 flow [2024-06-28 00:02:54,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 211 transitions, 2594 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 00:02:54,794 INFO L231 Difference]: Finished difference. Result has 177 places, 191 transitions, 2220 flow [2024-06-28 00:02:54,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2220, PETRI_PLACES=177, PETRI_TRANSITIONS=191} [2024-06-28 00:02:54,795 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-28 00:02:54,795 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 191 transitions, 2220 flow [2024-06-28 00:02:54,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:54,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:54,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:54,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:02:54,796 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:54,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:54,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1318647162, now seen corresponding path program 4 times [2024-06-28 00:02:54,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:54,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579686015] [2024-06-28 00:02:54,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:54,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:54,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:54,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579686015] [2024-06-28 00:02:54,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579686015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:54,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:54,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:54,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246552086] [2024-06-28 00:02:54,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:54,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:54,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:54,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:54,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:55,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:55,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 191 transitions, 2220 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:55,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:55,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:55,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:55,525 INFO L124 PetriNetUnfolderBase]: 1735/2958 cut-off events. [2024-06-28 00:02:55,526 INFO L125 PetriNetUnfolderBase]: For 66590/66590 co-relation queries the response was YES. [2024-06-28 00:02:55,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17146 conditions, 2958 events. 1735/2958 cut-off events. For 66590/66590 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18183 event pairs, 319 based on Foata normal form. 1/2954 useless extension candidates. Maximal degree in co-relation 17063. Up to 1999 conditions per place. [2024-06-28 00:02:55,565 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 132 selfloop transitions, 89 changer transitions 0/228 dead transitions. [2024-06-28 00:02:55,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 228 transitions, 3111 flow [2024-06-28 00:02:55,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:02:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:02:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-28 00:02:55,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-28 00:02:55,566 INFO L175 Difference]: Start difference. First operand has 177 places, 191 transitions, 2220 flow. Second operand 7 states and 152 transitions. [2024-06-28 00:02:55,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 228 transitions, 3111 flow [2024-06-28 00:02:55,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 228 transitions, 3002 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 00:02:55,713 INFO L231 Difference]: Finished difference. Result has 182 places, 206 transitions, 2626 flow [2024-06-28 00:02:55,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2626, PETRI_PLACES=182, PETRI_TRANSITIONS=206} [2024-06-28 00:02:55,714 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-28 00:02:55,714 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 206 transitions, 2626 flow [2024-06-28 00:02:55,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:55,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:55,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:55,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:02:55,715 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:55,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:55,715 INFO L85 PathProgramCache]: Analyzing trace with hash -445235952, now seen corresponding path program 1 times [2024-06-28 00:02:55,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:55,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95654800] [2024-06-28 00:02:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:55,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:56,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:56,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95654800] [2024-06-28 00:02:56,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95654800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:56,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:56,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:56,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884399239] [2024-06-28 00:02:56,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:56,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:56,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:56,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:56,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 206 transitions, 2626 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:56,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:56,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:56,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:56,711 INFO L124 PetriNetUnfolderBase]: 1801/3055 cut-off events. [2024-06-28 00:02:56,711 INFO L125 PetriNetUnfolderBase]: For 81060/81066 co-relation queries the response was YES. [2024-06-28 00:02:56,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18780 conditions, 3055 events. 1801/3055 cut-off events. For 81060/81066 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18942 event pairs, 634 based on Foata normal form. 11/3064 useless extension candidates. Maximal degree in co-relation 18694. Up to 2626 conditions per place. [2024-06-28 00:02:56,739 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 184 selfloop transitions, 46 changer transitions 0/237 dead transitions. [2024-06-28 00:02:56,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 237 transitions, 3389 flow [2024-06-28 00:02:56,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:02:56,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:02:56,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 00:02:56,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-28 00:02:56,741 INFO L175 Difference]: Start difference. First operand has 182 places, 206 transitions, 2626 flow. Second operand 8 states and 168 transitions. [2024-06-28 00:02:56,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 237 transitions, 3389 flow [2024-06-28 00:02:56,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 237 transitions, 3268 flow, removed 49 selfloop flow, removed 1 redundant places. [2024-06-28 00:02:56,870 INFO L231 Difference]: Finished difference. Result has 190 places, 213 transitions, 2727 flow [2024-06-28 00:02:56,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2513, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2727, PETRI_PLACES=190, PETRI_TRANSITIONS=213} [2024-06-28 00:02:56,870 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-28 00:02:56,871 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 213 transitions, 2727 flow [2024-06-28 00:02:56,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:56,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:56,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:56,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:02:56,871 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:56,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:56,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1318318872, now seen corresponding path program 5 times [2024-06-28 00:02:56,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:56,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022691886] [2024-06-28 00:02:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:56,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:57,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:57,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022691886] [2024-06-28 00:02:57,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022691886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:57,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:57,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:57,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39532953] [2024-06-28 00:02:57,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:57,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:57,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:57,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:57,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:57,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:57,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 213 transitions, 2727 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:57,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:57,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:57,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:57,551 INFO L124 PetriNetUnfolderBase]: 1819/3084 cut-off events. [2024-06-28 00:02:57,551 INFO L125 PetriNetUnfolderBase]: For 78482/78482 co-relation queries the response was YES. [2024-06-28 00:02:57,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18978 conditions, 3084 events. 1819/3084 cut-off events. For 78482/78482 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19020 event pairs, 328 based on Foata normal form. 1/3080 useless extension candidates. Maximal degree in co-relation 18889. Up to 2113 conditions per place. [2024-06-28 00:02:57,587 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 131 selfloop transitions, 99 changer transitions 0/237 dead transitions. [2024-06-28 00:02:57,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 237 transitions, 3478 flow [2024-06-28 00:02:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:02:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:02:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 00:02:57,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-28 00:02:57,588 INFO L175 Difference]: Start difference. First operand has 190 places, 213 transitions, 2727 flow. Second operand 7 states and 150 transitions. [2024-06-28 00:02:57,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 237 transitions, 3478 flow [2024-06-28 00:02:57,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 237 transitions, 3408 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 00:02:57,752 INFO L231 Difference]: Finished difference. Result has 192 places, 218 transitions, 2950 flow [2024-06-28 00:02:57,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2950, PETRI_PLACES=192, PETRI_TRANSITIONS=218} [2024-06-28 00:02:57,754 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-28 00:02:57,754 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 218 transitions, 2950 flow [2024-06-28 00:02:57,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:57,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:57,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:57,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:02:57,754 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:57,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:57,755 INFO L85 PathProgramCache]: Analyzing trace with hash 602515938, now seen corresponding path program 2 times [2024-06-28 00:02:57,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:57,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272193522] [2024-06-28 00:02:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:57,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:58,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:58,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272193522] [2024-06-28 00:02:58,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272193522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:58,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:58,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:58,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449199174] [2024-06-28 00:02:58,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:58,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:58,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:58,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:58,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:58,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:58,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 218 transitions, 2950 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:58,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:58,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:58,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:58,650 INFO L124 PetriNetUnfolderBase]: 1806/3055 cut-off events. [2024-06-28 00:02:58,650 INFO L125 PetriNetUnfolderBase]: For 80444/80450 co-relation queries the response was YES. [2024-06-28 00:02:58,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19001 conditions, 3055 events. 1806/3055 cut-off events. For 80444/80450 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 18942 event pairs, 644 based on Foata normal form. 11/3064 useless extension candidates. Maximal degree in co-relation 18911. Up to 2728 conditions per place. [2024-06-28 00:02:58,686 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 199 selfloop transitions, 24 changer transitions 0/230 dead transitions. [2024-06-28 00:02:58,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 230 transitions, 3462 flow [2024-06-28 00:02:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:58,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-28 00:02:58,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-28 00:02:58,690 INFO L175 Difference]: Start difference. First operand has 192 places, 218 transitions, 2950 flow. Second operand 6 states and 123 transitions. [2024-06-28 00:02:58,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 230 transitions, 3462 flow [2024-06-28 00:02:58,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 230 transitions, 3319 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 00:02:58,846 INFO L231 Difference]: Finished difference. Result has 195 places, 218 transitions, 2866 flow [2024-06-28 00:02:58,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2866, PETRI_PLACES=195, PETRI_TRANSITIONS=218} [2024-06-28 00:02:58,846 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-28 00:02:58,847 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 218 transitions, 2866 flow [2024-06-28 00:02:58,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:58,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:58,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:58,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:02:58,847 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:58,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:58,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1111665432, now seen corresponding path program 6 times [2024-06-28 00:02:58,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:58,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136351371] [2024-06-28 00:02:58,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:58,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:59,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:59,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136351371] [2024-06-28 00:02:59,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136351371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:59,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:59,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:59,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666294346] [2024-06-28 00:02:59,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:59,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:59,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:59,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:59,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:59,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:59,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 218 transitions, 2866 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:59,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:59,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:59,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:59,503 INFO L124 PetriNetUnfolderBase]: 1801/3046 cut-off events. [2024-06-28 00:02:59,503 INFO L125 PetriNetUnfolderBase]: For 77121/77121 co-relation queries the response was YES. [2024-06-28 00:02:59,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18695 conditions, 3046 events. 1801/3046 cut-off events. For 77121/77121 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18734 event pairs, 308 based on Foata normal form. 3/3044 useless extension candidates. Maximal degree in co-relation 18604. Up to 2273 conditions per place. [2024-06-28 00:02:59,532 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 166 selfloop transitions, 59 changer transitions 0/232 dead transitions. [2024-06-28 00:02:59,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 232 transitions, 3430 flow [2024-06-28 00:02:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:02:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:02:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-28 00:02:59,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-28 00:02:59,534 INFO L175 Difference]: Start difference. First operand has 195 places, 218 transitions, 2866 flow. Second operand 6 states and 127 transitions. [2024-06-28 00:02:59,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 232 transitions, 3430 flow [2024-06-28 00:02:59,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 232 transitions, 3365 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 00:02:59,690 INFO L231 Difference]: Finished difference. Result has 197 places, 218 transitions, 2926 flow [2024-06-28 00:02:59,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2801, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2926, PETRI_PLACES=197, PETRI_TRANSITIONS=218} [2024-06-28 00:02:59,691 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-28 00:02:59,691 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 218 transitions, 2926 flow [2024-06-28 00:02:59,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:59,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:59,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:02:59,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:02:59,692 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:59,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:59,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1111785402, now seen corresponding path program 7 times [2024-06-28 00:02:59,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:59,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383030687] [2024-06-28 00:02:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:59,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:02:59,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:59,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383030687] [2024-06-28 00:02:59,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383030687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:59,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:59,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:02:59,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124320120] [2024-06-28 00:02:59,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:59,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:02:59,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:59,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:02:59,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:02:59,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:02:59,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 218 transitions, 2926 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:02:59,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:59,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:02:59,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:00,459 INFO L124 PetriNetUnfolderBase]: 1793/3035 cut-off events. [2024-06-28 00:03:00,459 INFO L125 PetriNetUnfolderBase]: For 79134/79134 co-relation queries the response was YES. [2024-06-28 00:03:00,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18746 conditions, 3035 events. 1793/3035 cut-off events. For 79134/79134 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18644 event pairs, 308 based on Foata normal form. 3/3033 useless extension candidates. Maximal degree in co-relation 18654. Up to 2422 conditions per place. [2024-06-28 00:03:00,490 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 178 selfloop transitions, 45 changer transitions 0/230 dead transitions. [2024-06-28 00:03:00,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 230 transitions, 3404 flow [2024-06-28 00:03:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:00,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-28 00:03:00,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-28 00:03:00,491 INFO L175 Difference]: Start difference. First operand has 197 places, 218 transitions, 2926 flow. Second operand 6 states and 123 transitions. [2024-06-28 00:03:00,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 230 transitions, 3404 flow [2024-06-28 00:03:00,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 230 transitions, 3262 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 00:03:00,643 INFO L231 Difference]: Finished difference. Result has 199 places, 218 transitions, 2880 flow [2024-06-28 00:03:00,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2880, PETRI_PLACES=199, PETRI_TRANSITIONS=218} [2024-06-28 00:03:00,644 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-28 00:03:00,644 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 218 transitions, 2880 flow [2024-06-28 00:03:00,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:00,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:00,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:00,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:03:00,644 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)] === [2024-06-28 00:03:00,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:00,644 INFO L85 PathProgramCache]: Analyzing trace with hash 602783065, now seen corresponding path program 1 times [2024-06-28 00:03:00,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:00,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098746301] [2024-06-28 00:03:00,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:00,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:00,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:00,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098746301] [2024-06-28 00:03:00,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098746301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:00,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:00,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:00,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972697866] [2024-06-28 00:03:00,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:00,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:00,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:00,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:00,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:01,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:03:01,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 218 transitions, 2880 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:01,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:01,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:03:01,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:01,573 INFO L124 PetriNetUnfolderBase]: 1785/3028 cut-off events. [2024-06-28 00:03:01,573 INFO L125 PetriNetUnfolderBase]: For 81041/81047 co-relation queries the response was YES. [2024-06-28 00:03:01,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18481 conditions, 3028 events. 1785/3028 cut-off events. For 81041/81047 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18806 event pairs, 603 based on Foata normal form. 8/3034 useless extension candidates. Maximal degree in co-relation 18388. Up to 2709 conditions per place. [2024-06-28 00:03:01,596 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 195 selfloop transitions, 28 changer transitions 0/229 dead transitions. [2024-06-28 00:03:01,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 229 transitions, 3379 flow [2024-06-28 00:03:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-28 00:03:01,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2024-06-28 00:03:01,597 INFO L175 Difference]: Start difference. First operand has 199 places, 218 transitions, 2880 flow. Second operand 6 states and 109 transitions. [2024-06-28 00:03:01,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 229 transitions, 3379 flow [2024-06-28 00:03:01,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 229 transitions, 3266 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:01,761 INFO L231 Difference]: Finished difference. Result has 200 places, 219 transitions, 2864 flow [2024-06-28 00:03:01,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2767, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2864, PETRI_PLACES=200, PETRI_TRANSITIONS=219} [2024-06-28 00:03:01,762 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-28 00:03:01,762 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 219 transitions, 2864 flow [2024-06-28 00:03:01,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:01,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:01,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:01,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:03:01,763 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)] === [2024-06-28 00:03:01,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:01,763 INFO L85 PathProgramCache]: Analyzing trace with hash 795041394, now seen corresponding path program 3 times [2024-06-28 00:03:01,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:01,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339645484] [2024-06-28 00:03:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:01,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:02,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:02,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339645484] [2024-06-28 00:03:02,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339645484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:02,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:02,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:02,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753669934] [2024-06-28 00:03:02,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:02,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:02,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:02,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:02,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:02,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:02,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 219 transitions, 2864 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:02,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:02,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:02,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:02,757 INFO L124 PetriNetUnfolderBase]: 1817/3079 cut-off events. [2024-06-28 00:03:02,757 INFO L125 PetriNetUnfolderBase]: For 86688/86694 co-relation queries the response was YES. [2024-06-28 00:03:02,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18735 conditions, 3079 events. 1817/3079 cut-off events. For 86688/86694 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19115 event pairs, 645 based on Foata normal form. 11/3088 useless extension candidates. Maximal degree in co-relation 18641. Up to 2736 conditions per place. [2024-06-28 00:03:02,786 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 216 selfloop transitions, 24 changer transitions 0/247 dead transitions. [2024-06-28 00:03:02,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 247 transitions, 3519 flow [2024-06-28 00:03:02,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:02,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-28 00:03:02,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-28 00:03:02,787 INFO L175 Difference]: Start difference. First operand has 200 places, 219 transitions, 2864 flow. Second operand 8 states and 162 transitions. [2024-06-28 00:03:02,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 247 transitions, 3519 flow [2024-06-28 00:03:02,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 247 transitions, 3445 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:02,966 INFO L231 Difference]: Finished difference. Result has 204 places, 224 transitions, 2922 flow [2024-06-28 00:03:02,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2922, PETRI_PLACES=204, PETRI_TRANSITIONS=224} [2024-06-28 00:03:02,967 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-28 00:03:02,967 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 224 transitions, 2922 flow [2024-06-28 00:03:02,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:02,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:02,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:02,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:03:02,967 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)] === [2024-06-28 00:03:02,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:02,968 INFO L85 PathProgramCache]: Analyzing trace with hash -862912536, now seen corresponding path program 8 times [2024-06-28 00:03:02,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:02,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728966322] [2024-06-28 00:03:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:02,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:03,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:03,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728966322] [2024-06-28 00:03:03,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728966322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:03,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:03,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:03,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970810499] [2024-06-28 00:03:03,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:03,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:03,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:03,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:03,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:03,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:03,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 224 transitions, 2922 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:03,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:03,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:03,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:03,691 INFO L124 PetriNetUnfolderBase]: 1830/3092 cut-off events. [2024-06-28 00:03:03,691 INFO L125 PetriNetUnfolderBase]: For 83389/83389 co-relation queries the response was YES. [2024-06-28 00:03:03,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19063 conditions, 3092 events. 1830/3092 cut-off events. For 83389/83389 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18956 event pairs, 352 based on Foata normal form. 1/3088 useless extension candidates. Maximal degree in co-relation 18969. Up to 2532 conditions per place. [2024-06-28 00:03:03,727 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 185 selfloop transitions, 60 changer transitions 0/252 dead transitions. [2024-06-28 00:03:03,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 252 transitions, 3672 flow [2024-06-28 00:03:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:03:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:03:03,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 00:03:03,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-06-28 00:03:03,732 INFO L175 Difference]: Start difference. First operand has 204 places, 224 transitions, 2922 flow. Second operand 9 states and 178 transitions. [2024-06-28 00:03:03,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 252 transitions, 3672 flow [2024-06-28 00:03:03,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 252 transitions, 3603 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:03,922 INFO L231 Difference]: Finished difference. Result has 208 places, 230 transitions, 3085 flow [2024-06-28 00:03:03,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2853, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3085, PETRI_PLACES=208, PETRI_TRANSITIONS=230} [2024-06-28 00:03:03,923 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-28 00:03:03,923 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 230 transitions, 3085 flow [2024-06-28 00:03:03,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:03,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:03,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:03,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:03:03,923 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)] === [2024-06-28 00:03:03,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:03,923 INFO L85 PathProgramCache]: Analyzing trace with hash 126795286, now seen corresponding path program 4 times [2024-06-28 00:03:03,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:03,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93845054] [2024-06-28 00:03:03,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:03,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:04,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:04,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93845054] [2024-06-28 00:03:04,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93845054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:04,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:04,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:04,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679148653] [2024-06-28 00:03:04,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:04,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:04,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:04,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:04,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:04,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:04,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 230 transitions, 3085 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:04,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:04,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:04,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:05,030 INFO L124 PetriNetUnfolderBase]: 1904/3238 cut-off events. [2024-06-28 00:03:05,030 INFO L125 PetriNetUnfolderBase]: For 93179/93185 co-relation queries the response was YES. [2024-06-28 00:03:05,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20027 conditions, 3238 events. 1904/3238 cut-off events. For 93179/93185 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20261 event pairs, 626 based on Foata normal form. 9/3245 useless extension candidates. Maximal degree in co-relation 19932. Up to 2691 conditions per place. [2024-06-28 00:03:05,058 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 224 selfloop transitions, 36 changer transitions 0/267 dead transitions. [2024-06-28 00:03:05,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 267 transitions, 3823 flow [2024-06-28 00:03:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-28 00:03:05,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-28 00:03:05,059 INFO L175 Difference]: Start difference. First operand has 208 places, 230 transitions, 3085 flow. Second operand 8 states and 172 transitions. [2024-06-28 00:03:05,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 267 transitions, 3823 flow [2024-06-28 00:03:05,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 267 transitions, 3643 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:05,242 INFO L231 Difference]: Finished difference. Result has 211 places, 235 transitions, 3059 flow [2024-06-28 00:03:05,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3059, PETRI_PLACES=211, PETRI_TRANSITIONS=235} [2024-06-28 00:03:05,243 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-28 00:03:05,243 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 235 transitions, 3059 flow [2024-06-28 00:03:05,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:05,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:05,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:05,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:03:05,244 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)] === [2024-06-28 00:03:05,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:05,244 INFO L85 PathProgramCache]: Analyzing trace with hash -622452480, now seen corresponding path program 5 times [2024-06-28 00:03:05,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:05,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403583190] [2024-06-28 00:03:05,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:05,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:05,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:05,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403583190] [2024-06-28 00:03:05,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403583190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:05,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:05,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:05,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782393038] [2024-06-28 00:03:05,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:05,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:05,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:05,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:05,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:05,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:05,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 235 transitions, 3059 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:05,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:05,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:05,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:06,288 INFO L124 PetriNetUnfolderBase]: 1951/3300 cut-off events. [2024-06-28 00:03:06,289 INFO L125 PetriNetUnfolderBase]: For 104071/104077 co-relation queries the response was YES. [2024-06-28 00:03:06,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20963 conditions, 3300 events. 1951/3300 cut-off events. For 104071/104077 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 20690 event pairs, 661 based on Foata normal form. 11/3309 useless extension candidates. Maximal degree in co-relation 20867. Up to 2718 conditions per place. [2024-06-28 00:03:06,324 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 190 selfloop transitions, 70 changer transitions 0/267 dead transitions. [2024-06-28 00:03:06,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 267 transitions, 3937 flow [2024-06-28 00:03:06,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:03:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:03:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-28 00:03:06,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-28 00:03:06,325 INFO L175 Difference]: Start difference. First operand has 211 places, 235 transitions, 3059 flow. Second operand 9 states and 186 transitions. [2024-06-28 00:03:06,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 267 transitions, 3937 flow [2024-06-28 00:03:06,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 267 transitions, 3846 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 00:03:06,492 INFO L231 Difference]: Finished difference. Result has 216 places, 239 transitions, 3201 flow [2024-06-28 00:03:06,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3201, PETRI_PLACES=216, PETRI_TRANSITIONS=239} [2024-06-28 00:03:06,493 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-28 00:03:06,493 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 239 transitions, 3201 flow [2024-06-28 00:03:06,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:06,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:06,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:06,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:03:06,493 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)] === [2024-06-28 00:03:06,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:06,494 INFO L85 PathProgramCache]: Analyzing trace with hash -862584246, now seen corresponding path program 9 times [2024-06-28 00:03:06,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:06,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615933443] [2024-06-28 00:03:06,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:06,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:06,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:06,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615933443] [2024-06-28 00:03:06,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615933443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:06,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:06,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:06,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895415569] [2024-06-28 00:03:06,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:06,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:06,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:06,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:06,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:06,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:06,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 239 transitions, 3201 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:06,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:06,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:06,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:07,219 INFO L124 PetriNetUnfolderBase]: 1948/3301 cut-off events. [2024-06-28 00:03:07,219 INFO L125 PetriNetUnfolderBase]: For 97149/97149 co-relation queries the response was YES. [2024-06-28 00:03:07,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20883 conditions, 3301 events. 1948/3301 cut-off events. For 97149/97149 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 20566 event pairs, 367 based on Foata normal form. 1/3297 useless extension candidates. Maximal degree in co-relation 20786. Up to 2711 conditions per place. [2024-06-28 00:03:07,252 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 189 selfloop transitions, 59 changer transitions 0/255 dead transitions. [2024-06-28 00:03:07,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 255 transitions, 3753 flow [2024-06-28 00:03:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:03:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:03:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-28 00:03:07,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-28 00:03:07,253 INFO L175 Difference]: Start difference. First operand has 216 places, 239 transitions, 3201 flow. Second operand 7 states and 144 transitions. [2024-06-28 00:03:07,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 255 transitions, 3753 flow [2024-06-28 00:03:07,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 255 transitions, 3640 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 00:03:07,441 INFO L231 Difference]: Finished difference. Result has 219 places, 239 transitions, 3212 flow [2024-06-28 00:03:07,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3088, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3212, PETRI_PLACES=219, PETRI_TRANSITIONS=239} [2024-06-28 00:03:07,442 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-28 00:03:07,442 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 239 transitions, 3212 flow [2024-06-28 00:03:07,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:07,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:07,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:07,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:03:07,443 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)] === [2024-06-28 00:03:07,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:07,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1178975898, now seen corresponding path program 10 times [2024-06-28 00:03:07,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:07,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684954966] [2024-06-28 00:03:07,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:07,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:07,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:07,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684954966] [2024-06-28 00:03:07,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684954966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:07,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:07,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:07,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946817311] [2024-06-28 00:03:07,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:07,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:07,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:07,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:07,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:07,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:07,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 239 transitions, 3212 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:07,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:07,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:07,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:08,181 INFO L124 PetriNetUnfolderBase]: 1999/3364 cut-off events. [2024-06-28 00:03:08,181 INFO L125 PetriNetUnfolderBase]: For 108144/108144 co-relation queries the response was YES. [2024-06-28 00:03:08,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21701 conditions, 3364 events. 1999/3364 cut-off events. For 108144/108144 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20924 event pairs, 413 based on Foata normal form. 1/3360 useless extension candidates. Maximal degree in co-relation 21602. Up to 2229 conditions per place. [2024-06-28 00:03:08,216 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 147 selfloop transitions, 112 changer transitions 0/266 dead transitions. [2024-06-28 00:03:08,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 266 transitions, 4132 flow [2024-06-28 00:03:08,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:03:08,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:03:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-28 00:03:08,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-28 00:03:08,217 INFO L175 Difference]: Start difference. First operand has 219 places, 239 transitions, 3212 flow. Second operand 7 states and 147 transitions. [2024-06-28 00:03:08,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 266 transitions, 4132 flow [2024-06-28 00:03:08,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 266 transitions, 4014 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:08,490 INFO L231 Difference]: Finished difference. Result has 221 places, 245 transitions, 3524 flow [2024-06-28 00:03:08,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3524, PETRI_PLACES=221, PETRI_TRANSITIONS=245} [2024-06-28 00:03:08,490 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-28 00:03:08,490 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 245 transitions, 3524 flow [2024-06-28 00:03:08,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:08,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:08,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:08,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:03:08,491 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)] === [2024-06-28 00:03:08,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:08,491 INFO L85 PathProgramCache]: Analyzing trace with hash -12757771, now seen corresponding path program 2 times [2024-06-28 00:03:08,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:08,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39812322] [2024-06-28 00:03:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:08,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:08,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:08,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39812322] [2024-06-28 00:03:08,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39812322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:08,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:08,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:08,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056495857] [2024-06-28 00:03:08,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:08,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:08,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:08,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:08,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:08,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:08,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 245 transitions, 3524 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:08,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:08,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:08,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:09,269 INFO L124 PetriNetUnfolderBase]: 2007/3379 cut-off events. [2024-06-28 00:03:09,269 INFO L125 PetriNetUnfolderBase]: For 119412/119418 co-relation queries the response was YES. [2024-06-28 00:03:09,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22917 conditions, 3379 events. 2007/3379 cut-off events. For 119412/119418 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21245 event pairs, 622 based on Foata normal form. 8/3385 useless extension candidates. Maximal degree in co-relation 22816. Up to 3039 conditions per place. [2024-06-28 00:03:09,305 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 228 selfloop transitions, 24 changer transitions 0/259 dead transitions. [2024-06-28 00:03:09,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 259 transitions, 4111 flow [2024-06-28 00:03:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-28 00:03:09,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-28 00:03:09,307 INFO L175 Difference]: Start difference. First operand has 221 places, 245 transitions, 3524 flow. Second operand 6 states and 122 transitions. [2024-06-28 00:03:09,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 259 transitions, 4111 flow [2024-06-28 00:03:09,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 259 transitions, 3991 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 00:03:09,550 INFO L231 Difference]: Finished difference. Result has 224 places, 247 transitions, 3514 flow [2024-06-28 00:03:09,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3514, PETRI_PLACES=224, PETRI_TRANSITIONS=247} [2024-06-28 00:03:09,550 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-28 00:03:09,550 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 247 transitions, 3514 flow [2024-06-28 00:03:09,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:09,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:09,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:09,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:03:09,551 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)] === [2024-06-28 00:03:09,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:09,551 INFO L85 PathProgramCache]: Analyzing trace with hash 803607321, now seen corresponding path program 3 times [2024-06-28 00:03:09,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:09,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556573841] [2024-06-28 00:03:09,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:09,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:09,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:09,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556573841] [2024-06-28 00:03:09,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556573841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:09,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:09,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:09,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440643550] [2024-06-28 00:03:09,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:09,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:09,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:09,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:09,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:09,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:03:09,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 247 transitions, 3514 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:09,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:09,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:03:09,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:10,429 INFO L124 PetriNetUnfolderBase]: 2002/3372 cut-off events. [2024-06-28 00:03:10,429 INFO L125 PetriNetUnfolderBase]: For 119758/119764 co-relation queries the response was YES. [2024-06-28 00:03:10,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22925 conditions, 3372 events. 2002/3372 cut-off events. For 119758/119764 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 21159 event pairs, 628 based on Foata normal form. 8/3378 useless extension candidates. Maximal degree in co-relation 22821. Up to 2999 conditions per place. [2024-06-28 00:03:10,467 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 215 selfloop transitions, 40 changer transitions 0/261 dead transitions. [2024-06-28 00:03:10,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 261 transitions, 4111 flow [2024-06-28 00:03:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:03:10,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:03:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 00:03:10,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-28 00:03:10,468 INFO L175 Difference]: Start difference. First operand has 224 places, 247 transitions, 3514 flow. Second operand 7 states and 124 transitions. [2024-06-28 00:03:10,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 261 transitions, 4111 flow [2024-06-28 00:03:10,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 261 transitions, 4028 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:10,722 INFO L231 Difference]: Finished difference. Result has 226 places, 249 transitions, 3577 flow [2024-06-28 00:03:10,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3431, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3577, PETRI_PLACES=226, PETRI_TRANSITIONS=249} [2024-06-28 00:03:10,722 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-28 00:03:10,722 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 249 transitions, 3577 flow [2024-06-28 00:03:10,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:10,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:10,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:10,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:03:10,723 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)] === [2024-06-28 00:03:10,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:10,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1569794019, now seen corresponding path program 4 times [2024-06-28 00:03:10,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:10,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198481488] [2024-06-28 00:03:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:10,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:10,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:10,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198481488] [2024-06-28 00:03:10,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198481488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:10,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:10,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:10,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91368090] [2024-06-28 00:03:10,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:10,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:10,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:10,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:10,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:10,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:10,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 249 transitions, 3577 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:10,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:10,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:10,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:11,530 INFO L124 PetriNetUnfolderBase]: 2010/3384 cut-off events. [2024-06-28 00:03:11,531 INFO L125 PetriNetUnfolderBase]: For 120796/120802 co-relation queries the response was YES. [2024-06-28 00:03:11,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23077 conditions, 3384 events. 2010/3384 cut-off events. For 120796/120802 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 21258 event pairs, 673 based on Foata normal form. 8/3390 useless extension candidates. Maximal degree in co-relation 22973. Up to 3068 conditions per place. [2024-06-28 00:03:11,592 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 234 selfloop transitions, 20 changer transitions 0/261 dead transitions. [2024-06-28 00:03:11,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 261 transitions, 4163 flow [2024-06-28 00:03:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-28 00:03:11,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:03:11,593 INFO L175 Difference]: Start difference. First operand has 226 places, 249 transitions, 3577 flow. Second operand 6 states and 120 transitions. [2024-06-28 00:03:11,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 261 transitions, 4163 flow [2024-06-28 00:03:11,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 261 transitions, 4044 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:11,916 INFO L231 Difference]: Finished difference. Result has 226 places, 251 transitions, 3557 flow [2024-06-28 00:03:11,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3557, PETRI_PLACES=226, PETRI_TRANSITIONS=251} [2024-06-28 00:03:11,916 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-28 00:03:11,916 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 251 transitions, 3557 flow [2024-06-28 00:03:11,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:11,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:11,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:11,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:03:11,917 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)] === [2024-06-28 00:03:11,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:11,917 INFO L85 PathProgramCache]: Analyzing trace with hash 369409448, now seen corresponding path program 11 times [2024-06-28 00:03:11,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:11,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087699252] [2024-06-28 00:03:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:11,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:12,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:12,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087699252] [2024-06-28 00:03:12,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087699252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:12,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:12,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:12,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475498399] [2024-06-28 00:03:12,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:12,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:12,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:12,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:12,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:12,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:12,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 251 transitions, 3557 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:12,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:12,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:12,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:12,722 INFO L124 PetriNetUnfolderBase]: 2031/3412 cut-off events. [2024-06-28 00:03:12,722 INFO L125 PetriNetUnfolderBase]: For 120637/120637 co-relation queries the response was YES. [2024-06-28 00:03:12,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23292 conditions, 3412 events. 2031/3412 cut-off events. For 120637/120637 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 21213 event pairs, 326 based on Foata normal form. 3/3410 useless extension candidates. Maximal degree in co-relation 23189. Up to 2718 conditions per place. [2024-06-28 00:03:12,758 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 218 selfloop transitions, 49 changer transitions 0/274 dead transitions. [2024-06-28 00:03:12,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 274 transitions, 4296 flow [2024-06-28 00:03:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:03:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:03:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-28 00:03:12,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035714285714286 [2024-06-28 00:03:12,759 INFO L175 Difference]: Start difference. First operand has 226 places, 251 transitions, 3557 flow. Second operand 7 states and 141 transitions. [2024-06-28 00:03:12,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 274 transitions, 4296 flow [2024-06-28 00:03:12,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 274 transitions, 4225 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 00:03:12,995 INFO L231 Difference]: Finished difference. Result has 230 places, 257 transitions, 3730 flow [2024-06-28 00:03:12,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3730, PETRI_PLACES=230, PETRI_TRANSITIONS=257} [2024-06-28 00:03:12,996 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-28 00:03:12,996 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 257 transitions, 3730 flow [2024-06-28 00:03:12,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:12,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:12,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:12,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:03:12,997 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)] === [2024-06-28 00:03:12,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:12,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1392217029, now seen corresponding path program 5 times [2024-06-28 00:03:12,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:12,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308684773] [2024-06-28 00:03:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:12,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:13,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:13,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308684773] [2024-06-28 00:03:13,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308684773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:13,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:13,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:13,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86544793] [2024-06-28 00:03:13,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:13,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:13,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:13,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:13,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:13,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 257 transitions, 3730 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:13,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:13,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:13,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:13,901 INFO L124 PetriNetUnfolderBase]: 2026/3412 cut-off events. [2024-06-28 00:03:13,901 INFO L125 PetriNetUnfolderBase]: For 126255/126261 co-relation queries the response was YES. [2024-06-28 00:03:13,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23644 conditions, 3412 events. 2026/3412 cut-off events. For 126255/126261 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21357 event pairs, 669 based on Foata normal form. 8/3418 useless extension candidates. Maximal degree in co-relation 23539. Up to 3061 conditions per place. [2024-06-28 00:03:13,931 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 234 selfloop transitions, 31 changer transitions 0/272 dead transitions. [2024-06-28 00:03:13,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 272 transitions, 4385 flow [2024-06-28 00:03:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:03:13,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:03:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-28 00:03:13,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-28 00:03:13,932 INFO L175 Difference]: Start difference. First operand has 230 places, 257 transitions, 3730 flow. Second operand 6 states and 122 transitions. [2024-06-28 00:03:13,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 272 transitions, 4385 flow [2024-06-28 00:03:14,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 272 transitions, 4172 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-28 00:03:14,234 INFO L231 Difference]: Finished difference. Result has 233 places, 261 transitions, 3701 flow [2024-06-28 00:03:14,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3517, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3701, PETRI_PLACES=233, PETRI_TRANSITIONS=261} [2024-06-28 00:03:14,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-28 00:03:14,235 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 261 transitions, 3701 flow [2024-06-28 00:03:14,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:14,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:14,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:14,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:03:14,236 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)] === [2024-06-28 00:03:14,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:14,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1392662902, now seen corresponding path program 12 times [2024-06-28 00:03:14,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:14,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214318260] [2024-06-28 00:03:14,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:14,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:14,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:14,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214318260] [2024-06-28 00:03:14,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214318260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:14,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:14,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:14,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344830912] [2024-06-28 00:03:14,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:14,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:14,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:14,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:14,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:14,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:14,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 261 transitions, 3701 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:14,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:14,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:14,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:14,975 INFO L124 PetriNetUnfolderBase]: 2039/3428 cut-off events. [2024-06-28 00:03:14,975 INFO L125 PetriNetUnfolderBase]: For 129093/129093 co-relation queries the response was YES. [2024-06-28 00:03:15,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23430 conditions, 3428 events. 2039/3428 cut-off events. For 129093/129093 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21364 event pairs, 326 based on Foata normal form. 3/3426 useless extension candidates. Maximal degree in co-relation 23324. Up to 2478 conditions per place. [2024-06-28 00:03:15,013 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 198 selfloop transitions, 77 changer transitions 0/282 dead transitions. [2024-06-28 00:03:15,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 282 transitions, 4510 flow [2024-06-28 00:03:15,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:03:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:03:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-28 00:03:15,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107142857142857 [2024-06-28 00:03:15,014 INFO L175 Difference]: Start difference. First operand has 233 places, 261 transitions, 3701 flow. Second operand 7 states and 143 transitions. [2024-06-28 00:03:15,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 282 transitions, 4510 flow [2024-06-28 00:03:15,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 282 transitions, 4439 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-28 00:03:15,297 INFO L231 Difference]: Finished difference. Result has 238 places, 264 transitions, 3866 flow [2024-06-28 00:03:15,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3630, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3866, PETRI_PLACES=238, PETRI_TRANSITIONS=264} [2024-06-28 00:03:15,298 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-28 00:03:15,298 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 264 transitions, 3866 flow [2024-06-28 00:03:15,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:15,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:15,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:15,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:03:15,299 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)] === [2024-06-28 00:03:15,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:15,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1392662716, now seen corresponding path program 6 times [2024-06-28 00:03:15,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:15,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783391180] [2024-06-28 00:03:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:15,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:15,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:15,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783391180] [2024-06-28 00:03:15,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783391180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:15,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:15,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:15,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059944580] [2024-06-28 00:03:15,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:15,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:15,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:15,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:15,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:15,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:15,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 264 transitions, 3866 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:15,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:15,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:15,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:16,263 INFO L124 PetriNetUnfolderBase]: 2060/3472 cut-off events. [2024-06-28 00:03:16,264 INFO L125 PetriNetUnfolderBase]: For 137104/137110 co-relation queries the response was YES. [2024-06-28 00:03:16,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24080 conditions, 3472 events. 2060/3472 cut-off events. For 137104/137110 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 21915 event pairs, 678 based on Foata normal form. 9/3477 useless extension candidates. Maximal degree in co-relation 23972. Up to 3120 conditions per place. [2024-06-28 00:03:16,300 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 243 selfloop transitions, 30 changer transitions 0/280 dead transitions. [2024-06-28 00:03:16,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 280 transitions, 4528 flow [2024-06-28 00:03:16,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:03:16,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:03:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 00:03:16,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-06-28 00:03:16,301 INFO L175 Difference]: Start difference. First operand has 238 places, 264 transitions, 3866 flow. Second operand 7 states and 138 transitions. [2024-06-28 00:03:16,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 280 transitions, 4528 flow [2024-06-28 00:03:16,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 280 transitions, 4268 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:16,567 INFO L231 Difference]: Finished difference. Result has 240 places, 267 transitions, 3730 flow [2024-06-28 00:03:16,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3730, PETRI_PLACES=240, PETRI_TRANSITIONS=267} [2024-06-28 00:03:16,567 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 199 predicate places. [2024-06-28 00:03:16,567 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 267 transitions, 3730 flow [2024-06-28 00:03:16,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:16,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:16,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:16,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:03:16,568 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)] === [2024-06-28 00:03:16,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:16,568 INFO L85 PathProgramCache]: Analyzing trace with hash 369529418, now seen corresponding path program 13 times [2024-06-28 00:03:16,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:16,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930649538] [2024-06-28 00:03:16,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:16,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:16,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:16,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930649538] [2024-06-28 00:03:16,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930649538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:16,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:16,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:16,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271916390] [2024-06-28 00:03:16,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:16,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:16,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:16,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:16,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:16,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:16,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 267 transitions, 3730 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:16,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:16,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:16,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:17,343 INFO L124 PetriNetUnfolderBase]: 2065/3493 cut-off events. [2024-06-28 00:03:17,343 INFO L125 PetriNetUnfolderBase]: For 135457/135457 co-relation queries the response was YES. [2024-06-28 00:03:17,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23607 conditions, 3493 events. 2065/3493 cut-off events. For 135457/135457 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21914 event pairs, 345 based on Foata normal form. 3/3491 useless extension candidates. Maximal degree in co-relation 23498. Up to 2697 conditions per place. [2024-06-28 00:03:17,381 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 226 selfloop transitions, 56 changer transitions 0/289 dead transitions. [2024-06-28 00:03:17,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 289 transitions, 4551 flow [2024-06-28 00:03:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:03:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:03:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-28 00:03:17,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-28 00:03:17,382 INFO L175 Difference]: Start difference. First operand has 240 places, 267 transitions, 3730 flow. Second operand 7 states and 144 transitions. [2024-06-28 00:03:17,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 289 transitions, 4551 flow [2024-06-28 00:03:17,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 289 transitions, 4468 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:17,638 INFO L231 Difference]: Finished difference. Result has 242 places, 270 transitions, 3833 flow [2024-06-28 00:03:17,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3647, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3833, PETRI_PLACES=242, PETRI_TRANSITIONS=270} [2024-06-28 00:03:17,639 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-28 00:03:17,639 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 270 transitions, 3833 flow [2024-06-28 00:03:17,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:17,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:17,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:17,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:03:17,640 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)] === [2024-06-28 00:03:17,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:17,640 INFO L85 PathProgramCache]: Analyzing trace with hash 369529604, now seen corresponding path program 7 times [2024-06-28 00:03:17,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:17,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851777233] [2024-06-28 00:03:17,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:17,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:17,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:17,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851777233] [2024-06-28 00:03:17,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851777233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:17,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:17,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:17,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969079622] [2024-06-28 00:03:17,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:17,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:17,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:17,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:17,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:18,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:18,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 270 transitions, 3833 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:18,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:18,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:18,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:18,656 INFO L124 PetriNetUnfolderBase]: 2139/3624 cut-off events. [2024-06-28 00:03:18,656 INFO L125 PetriNetUnfolderBase]: For 165744/165750 co-relation queries the response was YES. [2024-06-28 00:03:18,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24746 conditions, 3624 events. 2139/3624 cut-off events. For 165744/165750 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23125 event pairs, 717 based on Foata normal form. 26/3648 useless extension candidates. Maximal degree in co-relation 24636. Up to 3155 conditions per place. [2024-06-28 00:03:18,711 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 262 selfloop transitions, 21 changer transitions 0/290 dead transitions. [2024-06-28 00:03:18,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 290 transitions, 4615 flow [2024-06-28 00:03:18,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:03:18,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:03:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-28 00:03:18,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49642857142857144 [2024-06-28 00:03:18,712 INFO L175 Difference]: Start difference. First operand has 242 places, 270 transitions, 3833 flow. Second operand 7 states and 139 transitions. [2024-06-28 00:03:18,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 290 transitions, 4615 flow [2024-06-28 00:03:19,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 290 transitions, 4368 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:19,015 INFO L231 Difference]: Finished difference. Result has 244 places, 272 transitions, 3705 flow [2024-06-28 00:03:19,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3626, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3705, PETRI_PLACES=244, PETRI_TRANSITIONS=272} [2024-06-28 00:03:19,015 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-28 00:03:19,016 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 272 transitions, 3705 flow [2024-06-28 00:03:19,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:19,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:19,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:19,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:03:19,017 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)] === [2024-06-28 00:03:19,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:19,017 INFO L85 PathProgramCache]: Analyzing trace with hash -463525616, now seen corresponding path program 8 times [2024-06-28 00:03:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:19,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187816562] [2024-06-28 00:03:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:19,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:19,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:19,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187816562] [2024-06-28 00:03:19,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187816562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:19,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:19,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:19,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301075500] [2024-06-28 00:03:19,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:19,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:19,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:19,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:19,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:19,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:19,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 272 transitions, 3705 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:19,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:19,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:19,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:20,100 INFO L124 PetriNetUnfolderBase]: 2131/3605 cut-off events. [2024-06-28 00:03:20,103 INFO L125 PetriNetUnfolderBase]: For 143240/143246 co-relation queries the response was YES. [2024-06-28 00:03:20,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24141 conditions, 3605 events. 2131/3605 cut-off events. For 143240/143246 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22967 event pairs, 706 based on Foata normal form. 9/3610 useless extension candidates. Maximal degree in co-relation 24030. Up to 3149 conditions per place. [2024-06-28 00:03:20,143 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 239 selfloop transitions, 42 changer transitions 0/288 dead transitions. [2024-06-28 00:03:20,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 288 transitions, 4381 flow [2024-06-28 00:03:20,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 00:03:20,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490625 [2024-06-28 00:03:20,144 INFO L175 Difference]: Start difference. First operand has 244 places, 272 transitions, 3705 flow. Second operand 8 states and 157 transitions. [2024-06-28 00:03:20,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 288 transitions, 4381 flow [2024-06-28 00:03:20,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 288 transitions, 4306 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:20,420 INFO L231 Difference]: Finished difference. Result has 247 places, 273 transitions, 3756 flow [2024-06-28 00:03:20,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3756, PETRI_PLACES=247, PETRI_TRANSITIONS=273} [2024-06-28 00:03:20,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-28 00:03:20,423 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 273 transitions, 3756 flow [2024-06-28 00:03:20,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:20,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:20,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:20,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:03:20,423 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)] === [2024-06-28 00:03:20,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash 803615257, now seen corresponding path program 1 times [2024-06-28 00:03:20,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:20,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668847961] [2024-06-28 00:03:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:20,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:20,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:20,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668847961] [2024-06-28 00:03:20,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668847961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:20,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:20,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:20,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44171728] [2024-06-28 00:03:20,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:20,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:20,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:20,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:20,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:20,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:03:20,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 273 transitions, 3756 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:20,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:20,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:03:20,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:21,576 INFO L124 PetriNetUnfolderBase]: 2118/3591 cut-off events. [2024-06-28 00:03:21,576 INFO L125 PetriNetUnfolderBase]: For 144326/144326 co-relation queries the response was YES. [2024-06-28 00:03:21,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23791 conditions, 3591 events. 2118/3591 cut-off events. For 144326/144326 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22989 event pairs, 899 based on Foata normal form. 6/3594 useless extension candidates. Maximal degree in co-relation 23678. Up to 3157 conditions per place. [2024-06-28 00:03:21,614 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 263 selfloop transitions, 22 changer transitions 0/291 dead transitions. [2024-06-28 00:03:21,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 291 transitions, 4420 flow [2024-06-28 00:03:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 00:03:21,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 00:03:21,615 INFO L175 Difference]: Start difference. First operand has 247 places, 273 transitions, 3756 flow. Second operand 8 states and 144 transitions. [2024-06-28 00:03:21,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 291 transitions, 4420 flow [2024-06-28 00:03:22,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 291 transitions, 4286 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 00:03:22,023 INFO L231 Difference]: Finished difference. Result has 248 places, 273 transitions, 3672 flow [2024-06-28 00:03:22,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3672, PETRI_PLACES=248, PETRI_TRANSITIONS=273} [2024-06-28 00:03:22,025 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-28 00:03:22,025 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 273 transitions, 3672 flow [2024-06-28 00:03:22,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:22,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:22,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:22,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:03:22,026 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)] === [2024-06-28 00:03:22,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:22,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1364405445, now seen corresponding path program 1 times [2024-06-28 00:03:22,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:22,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330664618] [2024-06-28 00:03:22,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:22,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:22,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:22,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330664618] [2024-06-28 00:03:22,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330664618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:22,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:22,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:03:22,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362959408] [2024-06-28 00:03:22,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:22,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:03:22,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:22,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:03:22,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:03:22,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:03:22,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 273 transitions, 3672 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:22,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:22,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:03:22,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:22,961 INFO L124 PetriNetUnfolderBase]: 2466/4219 cut-off events. [2024-06-28 00:03:22,961 INFO L125 PetriNetUnfolderBase]: For 203460/203508 co-relation queries the response was YES. [2024-06-28 00:03:22,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28608 conditions, 4219 events. 2466/4219 cut-off events. For 203460/203508 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 28065 event pairs, 189 based on Foata normal form. 56/4259 useless extension candidates. Maximal degree in co-relation 28494. Up to 2123 conditions per place. [2024-06-28 00:03:23,013 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 230 selfloop transitions, 84 changer transitions 0/357 dead transitions. [2024-06-28 00:03:23,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 357 transitions, 5361 flow [2024-06-28 00:03:23,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 00:03:23,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-28 00:03:23,015 INFO L175 Difference]: Start difference. First operand has 248 places, 273 transitions, 3672 flow. Second operand 8 states and 156 transitions. [2024-06-28 00:03:23,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 357 transitions, 5361 flow [2024-06-28 00:03:23,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 357 transitions, 5293 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-28 00:03:23,334 INFO L231 Difference]: Finished difference. Result has 250 places, 300 transitions, 4237 flow [2024-06-28 00:03:23,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3608, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4237, PETRI_PLACES=250, PETRI_TRANSITIONS=300} [2024-06-28 00:03:23,335 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-28 00:03:23,335 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 300 transitions, 4237 flow [2024-06-28 00:03:23,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:23,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:23,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:23,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:03:23,335 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)] === [2024-06-28 00:03:23,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1870353811, now seen corresponding path program 2 times [2024-06-28 00:03:23,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:23,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860764577] [2024-06-28 00:03:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:23,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:23,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:23,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860764577] [2024-06-28 00:03:23,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860764577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:23,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:23,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:23,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775480184] [2024-06-28 00:03:23,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:23,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:23,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:23,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:23,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:23,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 300 transitions, 4237 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:23,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:23,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:23,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:24,518 INFO L124 PetriNetUnfolderBase]: 2617/4412 cut-off events. [2024-06-28 00:03:24,519 INFO L125 PetriNetUnfolderBase]: For 182077/182083 co-relation queries the response was YES. [2024-06-28 00:03:24,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30846 conditions, 4412 events. 2617/4412 cut-off events. For 182077/182083 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 28973 event pairs, 523 based on Foata normal form. 8/4402 useless extension candidates. Maximal degree in co-relation 30732. Up to 3421 conditions per place. [2024-06-28 00:03:24,572 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 241 selfloop transitions, 84 changer transitions 0/332 dead transitions. [2024-06-28 00:03:24,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 332 transitions, 5181 flow [2024-06-28 00:03:24,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:24,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 00:03:24,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-28 00:03:24,574 INFO L175 Difference]: Start difference. First operand has 250 places, 300 transitions, 4237 flow. Second operand 8 states and 168 transitions. [2024-06-28 00:03:24,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 332 transitions, 5181 flow [2024-06-28 00:03:24,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 332 transitions, 5087 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-28 00:03:24,989 INFO L231 Difference]: Finished difference. Result has 256 places, 306 transitions, 4479 flow [2024-06-28 00:03:24,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4479, PETRI_PLACES=256, PETRI_TRANSITIONS=306} [2024-06-28 00:03:24,990 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-28 00:03:24,990 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 306 transitions, 4479 flow [2024-06-28 00:03:24,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:24,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:24,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:24,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:03:24,991 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)] === [2024-06-28 00:03:24,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:24,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1888865307, now seen corresponding path program 3 times [2024-06-28 00:03:24,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:24,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181139022] [2024-06-28 00:03:24,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:24,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:25,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:25,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181139022] [2024-06-28 00:03:25,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181139022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:25,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:25,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:25,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461844246] [2024-06-28 00:03:25,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:25,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:25,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:25,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:25,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:25,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:25,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 306 transitions, 4479 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:25,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:25,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:25,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:26,077 INFO L124 PetriNetUnfolderBase]: 2625/4424 cut-off events. [2024-06-28 00:03:26,078 INFO L125 PetriNetUnfolderBase]: For 188984/188990 co-relation queries the response was YES. [2024-06-28 00:03:26,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31400 conditions, 4424 events. 2625/4424 cut-off events. For 188984/188990 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29086 event pairs, 568 based on Foata normal form. 8/4418 useless extension candidates. Maximal degree in co-relation 31284. Up to 3655 conditions per place. [2024-06-28 00:03:26,130 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 266 selfloop transitions, 57 changer transitions 0/330 dead transitions. [2024-06-28 00:03:26,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 330 transitions, 5255 flow [2024-06-28 00:03:26,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:26,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-28 00:03:26,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-28 00:03:26,131 INFO L175 Difference]: Start difference. First operand has 256 places, 306 transitions, 4479 flow. Second operand 8 states and 162 transitions. [2024-06-28 00:03:26,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 330 transitions, 5255 flow [2024-06-28 00:03:26,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 330 transitions, 5026 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:26,513 INFO L231 Difference]: Finished difference. Result has 258 places, 309 transitions, 4448 flow [2024-06-28 00:03:26,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4268, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4448, PETRI_PLACES=258, PETRI_TRANSITIONS=309} [2024-06-28 00:03:26,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-28 00:03:26,513 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 309 transitions, 4448 flow [2024-06-28 00:03:26,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:26,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:26,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:26,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:03:26,514 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)] === [2024-06-28 00:03:26,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:26,514 INFO L85 PathProgramCache]: Analyzing trace with hash 586622813, now seen corresponding path program 4 times [2024-06-28 00:03:26,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:26,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236466466] [2024-06-28 00:03:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:26,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:26,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:26,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236466466] [2024-06-28 00:03:26,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236466466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:26,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:26,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:26,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136060014] [2024-06-28 00:03:26,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:26,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:26,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:26,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:26,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:26,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 309 transitions, 4448 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:26,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:26,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:26,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:27,775 INFO L124 PetriNetUnfolderBase]: 2674/4507 cut-off events. [2024-06-28 00:03:27,775 INFO L125 PetriNetUnfolderBase]: For 198082/198088 co-relation queries the response was YES. [2024-06-28 00:03:27,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32052 conditions, 4507 events. 2674/4507 cut-off events. For 198082/198088 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29687 event pairs, 485 based on Foata normal form. 8/4502 useless extension candidates. Maximal degree in co-relation 31936. Up to 3631 conditions per place. [2024-06-28 00:03:27,831 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 257 selfloop transitions, 74 changer transitions 0/338 dead transitions. [2024-06-28 00:03:27,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 338 transitions, 5404 flow [2024-06-28 00:03:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-28 00:03:27,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-28 00:03:27,832 INFO L175 Difference]: Start difference. First operand has 258 places, 309 transitions, 4448 flow. Second operand 8 states and 167 transitions. [2024-06-28 00:03:27,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 338 transitions, 5404 flow [2024-06-28 00:03:28,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 338 transitions, 5272 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:28,238 INFO L231 Difference]: Finished difference. Result has 260 places, 313 transitions, 4586 flow [2024-06-28 00:03:28,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4318, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4586, PETRI_PLACES=260, PETRI_TRANSITIONS=313} [2024-06-28 00:03:28,239 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-28 00:03:28,239 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 313 transitions, 4586 flow [2024-06-28 00:03:28,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:28,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:28,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:28,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 00:03:28,239 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)] === [2024-06-28 00:03:28,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:28,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1940059590, now seen corresponding path program 1 times [2024-06-28 00:03:28,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:28,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100407892] [2024-06-28 00:03:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:28,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:28,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:28,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100407892] [2024-06-28 00:03:28,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100407892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:28,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:28,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:28,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860097364] [2024-06-28 00:03:28,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:28,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:28,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:28,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:28,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:28,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:28,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 313 transitions, 4586 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:28,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:28,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:28,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:29,592 INFO L124 PetriNetUnfolderBase]: 2867/4835 cut-off events. [2024-06-28 00:03:29,592 INFO L125 PetriNetUnfolderBase]: For 247748/247754 co-relation queries the response was YES. [2024-06-28 00:03:29,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35419 conditions, 4835 events. 2867/4835 cut-off events. For 247748/247754 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 32328 event pairs, 514 based on Foata normal form. 21/4841 useless extension candidates. Maximal degree in co-relation 35303. Up to 3564 conditions per place. [2024-06-28 00:03:29,646 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 267 selfloop transitions, 81 changer transitions 0/355 dead transitions. [2024-06-28 00:03:29,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 355 transitions, 5700 flow [2024-06-28 00:03:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:03:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:03:29,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-28 00:03:29,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-06-28 00:03:29,647 INFO L175 Difference]: Start difference. First operand has 260 places, 313 transitions, 4586 flow. Second operand 10 states and 207 transitions. [2024-06-28 00:03:29,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 355 transitions, 5700 flow [2024-06-28 00:03:30,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 355 transitions, 5572 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 00:03:30,143 INFO L231 Difference]: Finished difference. Result has 267 places, 318 transitions, 4716 flow [2024-06-28 00:03:30,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4458, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4716, PETRI_PLACES=267, PETRI_TRANSITIONS=318} [2024-06-28 00:03:30,144 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-28 00:03:30,144 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 318 transitions, 4716 flow [2024-06-28 00:03:30,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:30,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:30,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:30,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 00:03:30,144 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)] === [2024-06-28 00:03:30,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:30,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1597676819, now seen corresponding path program 1 times [2024-06-28 00:03:30,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:30,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784108343] [2024-06-28 00:03:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:30,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:30,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:30,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784108343] [2024-06-28 00:03:30,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784108343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:30,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:30,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:03:30,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408500620] [2024-06-28 00:03:30,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:30,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:03:30,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:30,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:03:30,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:03:30,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:03:30,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 318 transitions, 4716 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:30,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:30,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:03:30,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:31,455 INFO L124 PetriNetUnfolderBase]: 2895/4895 cut-off events. [2024-06-28 00:03:31,456 INFO L125 PetriNetUnfolderBase]: For 244070/244082 co-relation queries the response was YES. [2024-06-28 00:03:31,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36262 conditions, 4895 events. 2895/4895 cut-off events. For 244070/244082 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32963 event pairs, 621 based on Foata normal form. 18/4905 useless extension candidates. Maximal degree in co-relation 36142. Up to 4040 conditions per place. [2024-06-28 00:03:31,517 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 287 selfloop transitions, 65 changer transitions 0/358 dead transitions. [2024-06-28 00:03:31,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 358 transitions, 5607 flow [2024-06-28 00:03:31,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:03:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:03:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 212 transitions. [2024-06-28 00:03:31,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-28 00:03:31,519 INFO L175 Difference]: Start difference. First operand has 267 places, 318 transitions, 4716 flow. Second operand 12 states and 212 transitions. [2024-06-28 00:03:31,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 358 transitions, 5607 flow [2024-06-28 00:03:32,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 358 transitions, 5480 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:32,074 INFO L231 Difference]: Finished difference. Result has 273 places, 322 transitions, 4813 flow [2024-06-28 00:03:32,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4589, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4813, PETRI_PLACES=273, PETRI_TRANSITIONS=322} [2024-06-28 00:03:32,076 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-28 00:03:32,076 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 322 transitions, 4813 flow [2024-06-28 00:03:32,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:32,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:32,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:32,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 00:03:32,077 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)] === [2024-06-28 00:03:32,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1605951029, now seen corresponding path program 2 times [2024-06-28 00:03:32,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:32,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453592934] [2024-06-28 00:03:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:32,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:32,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:32,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453592934] [2024-06-28 00:03:32,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453592934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:32,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:32,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:32,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496619377] [2024-06-28 00:03:32,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:32,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:32,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:32,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:32,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:32,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:32,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 322 transitions, 4813 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:32,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:32,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:32,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:33,272 INFO L124 PetriNetUnfolderBase]: 2903/4902 cut-off events. [2024-06-28 00:03:33,272 INFO L125 PetriNetUnfolderBase]: For 242961/242967 co-relation queries the response was YES. [2024-06-28 00:03:33,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36516 conditions, 4902 events. 2903/4902 cut-off events. For 242961/242967 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 32964 event pairs, 628 based on Foata normal form. 8/4899 useless extension candidates. Maximal degree in co-relation 36394. Up to 4098 conditions per place. [2024-06-28 00:03:33,341 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 277 selfloop transitions, 59 changer transitions 0/343 dead transitions. [2024-06-28 00:03:33,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 343 transitions, 5597 flow [2024-06-28 00:03:33,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:33,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 00:03:33,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:03:33,343 INFO L175 Difference]: Start difference. First operand has 273 places, 322 transitions, 4813 flow. Second operand 8 states and 160 transitions. [2024-06-28 00:03:33,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 343 transitions, 5597 flow [2024-06-28 00:03:33,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 343 transitions, 5456 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-28 00:03:33,926 INFO L231 Difference]: Finished difference. Result has 272 places, 324 transitions, 4855 flow [2024-06-28 00:03:33,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4672, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4855, PETRI_PLACES=272, PETRI_TRANSITIONS=324} [2024-06-28 00:03:33,926 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-28 00:03:33,926 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 324 transitions, 4855 flow [2024-06-28 00:03:33,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:33,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:33,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:33,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 00:03:33,927 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)] === [2024-06-28 00:03:33,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:33,927 INFO L85 PathProgramCache]: Analyzing trace with hash -905105949, now seen corresponding path program 5 times [2024-06-28 00:03:33,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:33,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835395990] [2024-06-28 00:03:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:33,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:34,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:34,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835395990] [2024-06-28 00:03:34,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835395990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:34,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:34,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:34,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152213366] [2024-06-28 00:03:34,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:34,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:34,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:34,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:34,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:34,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:34,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 324 transitions, 4855 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:34,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:34,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:34,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:35,220 INFO L124 PetriNetUnfolderBase]: 2911/4916 cut-off events. [2024-06-28 00:03:35,221 INFO L125 PetriNetUnfolderBase]: For 253140/253146 co-relation queries the response was YES. [2024-06-28 00:03:35,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36976 conditions, 4916 events. 2911/4916 cut-off events. For 253140/253146 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 33091 event pairs, 626 based on Foata normal form. 8/4912 useless extension candidates. Maximal degree in co-relation 36854. Up to 4110 conditions per place. [2024-06-28 00:03:35,282 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 279 selfloop transitions, 59 changer transitions 0/345 dead transitions. [2024-06-28 00:03:35,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 345 transitions, 5635 flow [2024-06-28 00:03:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 00:03:35,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:03:35,283 INFO L175 Difference]: Start difference. First operand has 272 places, 324 transitions, 4855 flow. Second operand 8 states and 160 transitions. [2024-06-28 00:03:35,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 345 transitions, 5635 flow [2024-06-28 00:03:35,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 345 transitions, 5488 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:35,875 INFO L231 Difference]: Finished difference. Result has 274 places, 326 transitions, 4883 flow [2024-06-28 00:03:35,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4708, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4883, PETRI_PLACES=274, PETRI_TRANSITIONS=326} [2024-06-28 00:03:35,876 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-28 00:03:35,876 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 326 transitions, 4883 flow [2024-06-28 00:03:35,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:35,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:35,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:35,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 00:03:35,876 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)] === [2024-06-28 00:03:35,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:35,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1605957756, now seen corresponding path program 2 times [2024-06-28 00:03:35,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:35,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918871623] [2024-06-28 00:03:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:35,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:36,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:36,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918871623] [2024-06-28 00:03:36,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918871623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:36,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:36,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:36,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665655520] [2024-06-28 00:03:36,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:36,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:36,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:36,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:36,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:36,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:36,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 326 transitions, 4883 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:36,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:36,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:36,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:37,221 INFO L124 PetriNetUnfolderBase]: 2956/5000 cut-off events. [2024-06-28 00:03:37,222 INFO L125 PetriNetUnfolderBase]: For 279194/279200 co-relation queries the response was YES. [2024-06-28 00:03:37,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37601 conditions, 5000 events. 2956/5000 cut-off events. For 279194/279200 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33795 event pairs, 634 based on Foata normal form. 19/5004 useless extension candidates. Maximal degree in co-relation 37478. Up to 4104 conditions per place. [2024-06-28 00:03:37,285 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 285 selfloop transitions, 59 changer transitions 0/351 dead transitions. [2024-06-28 00:03:37,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 351 transitions, 5731 flow [2024-06-28 00:03:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:03:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:03:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 00:03:37,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-06-28 00:03:37,286 INFO L175 Difference]: Start difference. First operand has 274 places, 326 transitions, 4883 flow. Second operand 9 states and 178 transitions. [2024-06-28 00:03:37,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 351 transitions, 5731 flow [2024-06-28 00:03:37,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 351 transitions, 5594 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:37,975 INFO L231 Difference]: Finished difference. Result has 277 places, 327 transitions, 4886 flow [2024-06-28 00:03:37,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4746, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4886, PETRI_PLACES=277, PETRI_TRANSITIONS=327} [2024-06-28 00:03:37,975 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-28 00:03:37,975 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 327 transitions, 4886 flow [2024-06-28 00:03:37,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:37,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:37,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:37,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 00:03:37,976 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)] === [2024-06-28 00:03:37,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:37,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1295493967, now seen corresponding path program 3 times [2024-06-28 00:03:37,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:37,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969532337] [2024-06-28 00:03:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:37,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:38,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:38,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969532337] [2024-06-28 00:03:38,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969532337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:38,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:38,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:03:38,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234145322] [2024-06-28 00:03:38,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:38,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:03:38,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:38,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:03:38,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:03:38,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:03:38,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 327 transitions, 4886 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:38,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:38,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:03:38,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:39,362 INFO L124 PetriNetUnfolderBase]: 3017/5094 cut-off events. [2024-06-28 00:03:39,362 INFO L125 PetriNetUnfolderBase]: For 274629/274635 co-relation queries the response was YES. [2024-06-28 00:03:39,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38467 conditions, 5094 events. 3017/5094 cut-off events. For 274629/274635 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 34582 event pairs, 530 based on Foata normal form. 12/5097 useless extension candidates. Maximal degree in co-relation 38342. Up to 4212 conditions per place. [2024-06-28 00:03:39,429 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 301 selfloop transitions, 62 changer transitions 0/369 dead transitions. [2024-06-28 00:03:39,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 369 transitions, 5948 flow [2024-06-28 00:03:39,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:03:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:03:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 00:03:39,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-28 00:03:39,431 INFO L175 Difference]: Start difference. First operand has 277 places, 327 transitions, 4886 flow. Second operand 9 states and 163 transitions. [2024-06-28 00:03:39,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 369 transitions, 5948 flow [2024-06-28 00:03:40,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 369 transitions, 5817 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 00:03:40,155 INFO L231 Difference]: Finished difference. Result has 279 places, 338 transitions, 5138 flow [2024-06-28 00:03:40,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4766, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5138, PETRI_PLACES=279, PETRI_TRANSITIONS=338} [2024-06-28 00:03:40,155 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-28 00:03:40,156 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 338 transitions, 5138 flow [2024-06-28 00:03:40,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:03:40,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:40,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:40,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 00:03:40,156 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)] === [2024-06-28 00:03:40,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:40,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2076824386, now seen corresponding path program 3 times [2024-06-28 00:03:40,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:40,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760408638] [2024-06-28 00:03:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:40,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:40,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:40,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760408638] [2024-06-28 00:03:40,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760408638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:40,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:40,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:40,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797869889] [2024-06-28 00:03:40,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:40,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:40,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:40,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:40,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:40,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:40,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 338 transitions, 5138 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:40,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:40,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:40,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:41,578 INFO L124 PetriNetUnfolderBase]: 3082/5169 cut-off events. [2024-06-28 00:03:41,578 INFO L125 PetriNetUnfolderBase]: For 285162/285168 co-relation queries the response was YES. [2024-06-28 00:03:41,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39826 conditions, 5169 events. 3082/5169 cut-off events. For 285162/285168 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 34839 event pairs, 351 based on Foata normal form. 7/5163 useless extension candidates. Maximal degree in co-relation 39700. Up to 2457 conditions per place. [2024-06-28 00:03:41,647 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 221 selfloop transitions, 165 changer transitions 0/393 dead transitions. [2024-06-28 00:03:41,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 393 transitions, 6747 flow [2024-06-28 00:03:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:03:41,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:03:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-28 00:03:41,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-28 00:03:41,648 INFO L175 Difference]: Start difference. First operand has 279 places, 338 transitions, 5138 flow. Second operand 10 states and 216 transitions. [2024-06-28 00:03:41,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 393 transitions, 6747 flow [2024-06-28 00:03:42,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 393 transitions, 6616 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 00:03:42,410 INFO L231 Difference]: Finished difference. Result has 284 places, 351 transitions, 5718 flow [2024-06-28 00:03:42,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5007, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5718, PETRI_PLACES=284, PETRI_TRANSITIONS=351} [2024-06-28 00:03:42,411 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-28 00:03:42,411 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 351 transitions, 5718 flow [2024-06-28 00:03:42,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:42,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:42,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:42,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 00:03:42,412 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)] === [2024-06-28 00:03:42,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:42,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2077152676, now seen corresponding path program 4 times [2024-06-28 00:03:42,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:42,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802722917] [2024-06-28 00:03:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:42,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:42,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:42,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802722917] [2024-06-28 00:03:42,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802722917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:42,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:42,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:42,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912043075] [2024-06-28 00:03:42,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:42,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:42,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:42,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:42,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:42,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:42,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 351 transitions, 5718 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:42,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:42,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:42,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:43,935 INFO L124 PetriNetUnfolderBase]: 3203/5370 cut-off events. [2024-06-28 00:03:43,936 INFO L125 PetriNetUnfolderBase]: For 345779/345785 co-relation queries the response was YES. [2024-06-28 00:03:43,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44782 conditions, 5370 events. 3203/5370 cut-off events. For 345779/345785 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 36397 event pairs, 320 based on Foata normal form. 11/5372 useless extension candidates. Maximal degree in co-relation 44654. Up to 2490 conditions per place. [2024-06-28 00:03:44,009 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 204 selfloop transitions, 186 changer transitions 0/397 dead transitions. [2024-06-28 00:03:44,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 397 transitions, 7313 flow [2024-06-28 00:03:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:03:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:03:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-28 00:03:44,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-28 00:03:44,010 INFO L175 Difference]: Start difference. First operand has 284 places, 351 transitions, 5718 flow. Second operand 10 states and 215 transitions. [2024-06-28 00:03:44,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 397 transitions, 7313 flow [2024-06-28 00:03:44,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 397 transitions, 6940 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:44,881 INFO L231 Difference]: Finished difference. Result has 289 places, 360 transitions, 5994 flow [2024-06-28 00:03:44,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5391, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5994, PETRI_PLACES=289, PETRI_TRANSITIONS=360} [2024-06-28 00:03:44,882 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-28 00:03:44,882 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 360 transitions, 5994 flow [2024-06-28 00:03:44,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:44,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:44,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:44,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 00:03:44,882 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)] === [2024-06-28 00:03:44,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:44,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2071462006, now seen corresponding path program 5 times [2024-06-28 00:03:44,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:44,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833318308] [2024-06-28 00:03:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:44,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:45,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:45,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833318308] [2024-06-28 00:03:45,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833318308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:45,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:45,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:45,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314661594] [2024-06-28 00:03:45,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:45,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:45,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:45,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:45,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:45,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:45,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 360 transitions, 5994 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:45,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:45,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:45,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:46,529 INFO L124 PetriNetUnfolderBase]: 3497/5889 cut-off events. [2024-06-28 00:03:46,529 INFO L125 PetriNetUnfolderBase]: For 436201/436207 co-relation queries the response was YES. [2024-06-28 00:03:46,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50751 conditions, 5889 events. 3497/5889 cut-off events. For 436201/436207 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 40943 event pairs, 508 based on Foata normal form. 23/5895 useless extension candidates. Maximal degree in co-relation 50621. Up to 3910 conditions per place. [2024-06-28 00:03:46,602 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 266 selfloop transitions, 131 changer transitions 0/404 dead transitions. [2024-06-28 00:03:46,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 404 transitions, 7439 flow [2024-06-28 00:03:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:03:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:03:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-28 00:03:46,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-06-28 00:03:46,603 INFO L175 Difference]: Start difference. First operand has 289 places, 360 transitions, 5994 flow. Second operand 9 states and 194 transitions. [2024-06-28 00:03:46,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 404 transitions, 7439 flow [2024-06-28 00:03:47,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 404 transitions, 7158 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 00:03:47,712 INFO L231 Difference]: Finished difference. Result has 293 places, 366 transitions, 6120 flow [2024-06-28 00:03:47,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5719, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6120, PETRI_PLACES=293, PETRI_TRANSITIONS=366} [2024-06-28 00:03:47,713 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-28 00:03:47,713 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 366 transitions, 6120 flow [2024-06-28 00:03:47,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:47,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:47,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:47,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 00:03:47,714 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)] === [2024-06-28 00:03:47,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:47,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2077152893, now seen corresponding path program 1 times [2024-06-28 00:03:47,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:47,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179208823] [2024-06-28 00:03:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:47,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:48,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:48,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:48,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179208823] [2024-06-28 00:03:48,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179208823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:48,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:48,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:48,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579881194] [2024-06-28 00:03:48,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:48,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:48,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:48,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:48,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:48,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:48,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 366 transitions, 6120 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:48,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:48,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:48,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:49,576 INFO L124 PetriNetUnfolderBase]: 3584/6065 cut-off events. [2024-06-28 00:03:49,577 INFO L125 PetriNetUnfolderBase]: For 460426/460438 co-relation queries the response was YES. [2024-06-28 00:03:49,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52692 conditions, 6065 events. 3584/6065 cut-off events. For 460426/460438 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 43047 event pairs, 1049 based on Foata normal form. 21/6072 useless extension candidates. Maximal degree in co-relation 52560. Up to 4972 conditions per place. [2024-06-28 00:03:49,674 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 331 selfloop transitions, 63 changer transitions 0/401 dead transitions. [2024-06-28 00:03:49,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 401 transitions, 7326 flow [2024-06-28 00:03:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:03:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:03:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-28 00:03:49,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5305555555555556 [2024-06-28 00:03:49,675 INFO L175 Difference]: Start difference. First operand has 293 places, 366 transitions, 6120 flow. Second operand 9 states and 191 transitions. [2024-06-28 00:03:49,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 401 transitions, 7326 flow [2024-06-28 00:03:50,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 401 transitions, 7119 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:50,727 INFO L231 Difference]: Finished difference. Result has 297 places, 368 transitions, 6109 flow [2024-06-28 00:03:50,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5913, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6109, PETRI_PLACES=297, PETRI_TRANSITIONS=368} [2024-06-28 00:03:50,728 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 256 predicate places. [2024-06-28 00:03:50,728 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 368 transitions, 6109 flow [2024-06-28 00:03:50,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:50,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:50,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:50,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 00:03:50,728 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)] === [2024-06-28 00:03:50,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:50,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2081788571, now seen corresponding path program 6 times [2024-06-28 00:03:50,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:50,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889388996] [2024-06-28 00:03:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:50,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:51,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:51,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889388996] [2024-06-28 00:03:51,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889388996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:51,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:51,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:51,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679539107] [2024-06-28 00:03:51,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:51,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:51,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:51,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:51,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:51,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:51,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 368 transitions, 6109 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:51,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:51,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:51,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:52,294 INFO L124 PetriNetUnfolderBase]: 3619/6106 cut-off events. [2024-06-28 00:03:52,294 INFO L125 PetriNetUnfolderBase]: For 460154/460160 co-relation queries the response was YES. [2024-06-28 00:03:52,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53455 conditions, 6106 events. 3619/6106 cut-off events. For 460154/460160 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 42887 event pairs, 473 based on Foata normal form. 8/6099 useless extension candidates. Maximal degree in co-relation 53321. Up to 4502 conditions per place. [2024-06-28 00:03:52,558 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 253 selfloop transitions, 134 changer transitions 0/394 dead transitions. [2024-06-28 00:03:52,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 394 transitions, 7270 flow [2024-06-28 00:03:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:03:52,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:03:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 00:03:52,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-28 00:03:52,564 INFO L175 Difference]: Start difference. First operand has 297 places, 368 transitions, 6109 flow. Second operand 7 states and 150 transitions. [2024-06-28 00:03:52,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 394 transitions, 7270 flow [2024-06-28 00:03:53,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 394 transitions, 7198 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 00:03:53,578 INFO L231 Difference]: Finished difference. Result has 301 places, 375 transitions, 6618 flow [2024-06-28 00:03:53,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6039, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6618, PETRI_PLACES=301, PETRI_TRANSITIONS=375} [2024-06-28 00:03:53,579 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-28 00:03:53,579 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 375 transitions, 6618 flow [2024-06-28 00:03:53,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:53,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:53,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:53,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 00:03:53,579 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)] === [2024-06-28 00:03:53,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:53,580 INFO L85 PathProgramCache]: Analyzing trace with hash -912775745, now seen corresponding path program 4 times [2024-06-28 00:03:53,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:53,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628944330] [2024-06-28 00:03:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:53,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:53,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:53,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628944330] [2024-06-28 00:03:53,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628944330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:53,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:53,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:53,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036835060] [2024-06-28 00:03:53,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:53,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:53,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:53,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:53,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:53,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:53,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 375 transitions, 6618 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:53,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:53,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:53,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:55,183 INFO L124 PetriNetUnfolderBase]: 3666/6193 cut-off events. [2024-06-28 00:03:55,183 INFO L125 PetriNetUnfolderBase]: For 488502/488508 co-relation queries the response was YES. [2024-06-28 00:03:55,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55810 conditions, 6193 events. 3666/6193 cut-off events. For 488502/488508 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 43661 event pairs, 576 based on Foata normal form. 8/6194 useless extension candidates. Maximal degree in co-relation 55674. Up to 4592 conditions per place. [2024-06-28 00:03:55,275 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 269 selfloop transitions, 131 changer transitions 0/407 dead transitions. [2024-06-28 00:03:55,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 407 transitions, 8027 flow [2024-06-28 00:03:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:03:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:03:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-28 00:03:55,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-28 00:03:55,276 INFO L175 Difference]: Start difference. First operand has 301 places, 375 transitions, 6618 flow. Second operand 7 states and 152 transitions. [2024-06-28 00:03:55,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 407 transitions, 8027 flow [2024-06-28 00:03:56,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 407 transitions, 7865 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-28 00:03:56,527 INFO L231 Difference]: Finished difference. Result has 307 places, 386 transitions, 7161 flow [2024-06-28 00:03:56,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6460, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7161, PETRI_PLACES=307, PETRI_TRANSITIONS=386} [2024-06-28 00:03:56,527 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-28 00:03:56,527 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 386 transitions, 7161 flow [2024-06-28 00:03:56,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:56,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:56,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:56,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 00:03:56,528 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)] === [2024-06-28 00:03:56,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:56,528 INFO L85 PathProgramCache]: Analyzing trace with hash -912775962, now seen corresponding path program 6 times [2024-06-28 00:03:56,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:56,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347683744] [2024-06-28 00:03:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:56,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:03:56,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:56,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347683744] [2024-06-28 00:03:56,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347683744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:56,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:56,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:56,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853745355] [2024-06-28 00:03:56,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:56,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:56,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:56,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:56,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:56,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:03:56,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 386 transitions, 7161 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:56,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:56,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:03:56,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:58,229 INFO L124 PetriNetUnfolderBase]: 3637/6159 cut-off events. [2024-06-28 00:03:58,230 INFO L125 PetriNetUnfolderBase]: For 489815/489821 co-relation queries the response was YES. [2024-06-28 00:03:58,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55913 conditions, 6159 events. 3637/6159 cut-off events. For 489815/489821 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 43495 event pairs, 580 based on Foata normal form. 19/6171 useless extension candidates. Maximal degree in co-relation 55774. Up to 4591 conditions per place. [2024-06-28 00:03:58,321 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 270 selfloop transitions, 133 changer transitions 0/410 dead transitions. [2024-06-28 00:03:58,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 410 transitions, 8257 flow [2024-06-28 00:03:58,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:03:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:03:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 00:03:58,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-28 00:03:58,323 INFO L175 Difference]: Start difference. First operand has 307 places, 386 transitions, 7161 flow. Second operand 8 states and 168 transitions. [2024-06-28 00:03:58,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 410 transitions, 8257 flow [2024-06-28 00:03:59,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 410 transitions, 8137 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-28 00:03:59,596 INFO L231 Difference]: Finished difference. Result has 313 places, 386 transitions, 7314 flow [2024-06-28 00:03:59,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7041, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7314, PETRI_PLACES=313, PETRI_TRANSITIONS=386} [2024-06-28 00:03:59,597 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-28 00:03:59,597 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 386 transitions, 7314 flow [2024-06-28 00:03:59,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:03:59,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:59,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:03:59,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 00:03:59,597 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)] === [2024-06-28 00:03:59,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:59,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1506406629, now seen corresponding path program 1 times [2024-06-28 00:03:59,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:59,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151244554] [2024-06-28 00:03:59,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:59,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:00,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:00,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151244554] [2024-06-28 00:04:00,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151244554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:00,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:00,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:00,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203339960] [2024-06-28 00:04:00,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:00,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:00,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:00,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:00,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:00,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:04:00,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 386 transitions, 7314 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:00,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:00,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:04:00,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:01,441 INFO L124 PetriNetUnfolderBase]: 3632/6140 cut-off events. [2024-06-28 00:04:01,441 INFO L125 PetriNetUnfolderBase]: For 474297/474303 co-relation queries the response was YES. [2024-06-28 00:04:01,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56078 conditions, 6140 events. 3632/6140 cut-off events. For 474297/474303 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 43570 event pairs, 1076 based on Foata normal form. 8/6144 useless extension candidates. Maximal degree in co-relation 55936. Up to 5486 conditions per place. [2024-06-28 00:04:01,527 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 358 selfloop transitions, 36 changer transitions 0/400 dead transitions. [2024-06-28 00:04:01,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 400 transitions, 8193 flow [2024-06-28 00:04:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:01,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 00:04:01,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-28 00:04:01,528 INFO L175 Difference]: Start difference. First operand has 313 places, 386 transitions, 7314 flow. Second operand 7 states and 131 transitions. [2024-06-28 00:04:01,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 400 transitions, 8193 flow [2024-06-28 00:04:02,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 400 transitions, 7924 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:02,829 INFO L231 Difference]: Finished difference. Result has 314 places, 387 transitions, 7160 flow [2024-06-28 00:04:02,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7045, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7160, PETRI_PLACES=314, PETRI_TRANSITIONS=387} [2024-06-28 00:04:02,830 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-28 00:04:02,830 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 387 transitions, 7160 flow [2024-06-28 00:04:02,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:02,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:02,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:02,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 00:04:02,830 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)] === [2024-06-28 00:04:02,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:02,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1494400856, now seen corresponding path program 7 times [2024-06-28 00:04:02,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:02,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001076595] [2024-06-28 00:04:02,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:02,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:03,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:03,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:03,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001076595] [2024-06-28 00:04:03,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001076595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:03,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:03,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:03,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752058223] [2024-06-28 00:04:03,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:03,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:03,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:03,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:03,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:03,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:03,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 387 transitions, 7160 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:03,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:03,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:03,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:04,531 INFO L124 PetriNetUnfolderBase]: 3585/6086 cut-off events. [2024-06-28 00:04:04,532 INFO L125 PetriNetUnfolderBase]: For 473108/473108 co-relation queries the response was YES. [2024-06-28 00:04:04,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53773 conditions, 6086 events. 3585/6086 cut-off events. For 473108/473108 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 43102 event pairs, 725 based on Foata normal form. 21/6098 useless extension candidates. Maximal degree in co-relation 53630. Up to 5050 conditions per place. [2024-06-28 00:04:04,618 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 350 selfloop transitions, 51 changer transitions 0/408 dead transitions. [2024-06-28 00:04:04,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 408 transitions, 8190 flow [2024-06-28 00:04:04,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-28 00:04:04,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-28 00:04:04,619 INFO L175 Difference]: Start difference. First operand has 314 places, 387 transitions, 7160 flow. Second operand 7 states and 142 transitions. [2024-06-28 00:04:04,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 408 transitions, 8190 flow [2024-06-28 00:04:05,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 408 transitions, 8060 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:05,634 INFO L231 Difference]: Finished difference. Result has 315 places, 388 transitions, 7160 flow [2024-06-28 00:04:05,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7036, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7160, PETRI_PLACES=315, PETRI_TRANSITIONS=388} [2024-06-28 00:04:05,634 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-28 00:04:05,635 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 388 transitions, 7160 flow [2024-06-28 00:04:05,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:05,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:05,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:05,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 00:04:05,635 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)] === [2024-06-28 00:04:05,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:05,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1494408513, now seen corresponding path program 5 times [2024-06-28 00:04:05,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:05,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728262842] [2024-06-28 00:04:05,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:05,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:05,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:05,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728262842] [2024-06-28 00:04:05,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728262842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:05,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:05,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:05,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868635727] [2024-06-28 00:04:05,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:05,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:05,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:05,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:05,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:05,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:05,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 388 transitions, 7160 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:05,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:05,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:05,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:07,233 INFO L124 PetriNetUnfolderBase]: 3580/6083 cut-off events. [2024-06-28 00:04:07,233 INFO L125 PetriNetUnfolderBase]: For 430659/430659 co-relation queries the response was YES. [2024-06-28 00:04:07,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53459 conditions, 6083 events. 3580/6083 cut-off events. For 430659/430659 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 43128 event pairs, 713 based on Foata normal form. 2/6076 useless extension candidates. Maximal degree in co-relation 53317. Up to 5146 conditions per place. [2024-06-28 00:04:07,314 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 343 selfloop transitions, 53 changer transitions 0/403 dead transitions. [2024-06-28 00:04:07,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 403 transitions, 8057 flow [2024-06-28 00:04:07,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:04:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:04:07,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-28 00:04:07,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-28 00:04:07,315 INFO L175 Difference]: Start difference. First operand has 315 places, 388 transitions, 7160 flow. Second operand 6 states and 123 transitions. [2024-06-28 00:04:07,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 403 transitions, 8057 flow [2024-06-28 00:04:08,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 403 transitions, 7955 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 00:04:08,389 INFO L231 Difference]: Finished difference. Result has 317 places, 391 transitions, 7254 flow [2024-06-28 00:04:08,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7254, PETRI_PLACES=317, PETRI_TRANSITIONS=391} [2024-06-28 00:04:08,389 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-28 00:04:08,389 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 391 transitions, 7254 flow [2024-06-28 00:04:08,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:08,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:08,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:08,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 00:04:08,390 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)] === [2024-06-28 00:04:08,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:08,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1498132233, now seen corresponding path program 6 times [2024-06-28 00:04:08,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:08,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943293793] [2024-06-28 00:04:08,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:08,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:08,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:08,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943293793] [2024-06-28 00:04:08,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943293793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:08,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:08,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:08,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587191817] [2024-06-28 00:04:08,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:08,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:08,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:08,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:08,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:08,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:08,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 391 transitions, 7254 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:08,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:08,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:08,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:10,062 INFO L124 PetriNetUnfolderBase]: 3562/6052 cut-off events. [2024-06-28 00:04:10,063 INFO L125 PetriNetUnfolderBase]: For 432954/432954 co-relation queries the response was YES. [2024-06-28 00:04:10,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52951 conditions, 6052 events. 3562/6052 cut-off events. For 432954/432954 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 42824 event pairs, 674 based on Foata normal form. 7/6052 useless extension candidates. Maximal degree in co-relation 52807. Up to 4167 conditions per place. [2024-06-28 00:04:10,162 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 311 selfloop transitions, 101 changer transitions 0/419 dead transitions. [2024-06-28 00:04:10,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 419 transitions, 8626 flow [2024-06-28 00:04:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:04:10,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:04:10,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-28 00:04:10,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-28 00:04:10,163 INFO L175 Difference]: Start difference. First operand has 317 places, 391 transitions, 7254 flow. Second operand 8 states and 167 transitions. [2024-06-28 00:04:10,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 419 transitions, 8626 flow [2024-06-28 00:04:11,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 419 transitions, 8467 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-28 00:04:11,478 INFO L231 Difference]: Finished difference. Result has 324 places, 396 transitions, 7501 flow [2024-06-28 00:04:11,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7105, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7501, PETRI_PLACES=324, PETRI_TRANSITIONS=396} [2024-06-28 00:04:11,479 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-28 00:04:11,479 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 396 transitions, 7501 flow [2024-06-28 00:04:11,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:11,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:11,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:11,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 00:04:11,479 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)] === [2024-06-28 00:04:11,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:11,480 INFO L85 PathProgramCache]: Analyzing trace with hash -105612171, now seen corresponding path program 7 times [2024-06-28 00:04:11,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:11,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985280979] [2024-06-28 00:04:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:11,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:11,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:11,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985280979] [2024-06-28 00:04:11,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985280979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:11,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:11,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:04:11,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073642523] [2024-06-28 00:04:11,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:11,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:04:11,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:11,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:04:11,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:04:11,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:04:11,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 396 transitions, 7501 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:11,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:11,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:04:11,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:13,248 INFO L124 PetriNetUnfolderBase]: 3549/6037 cut-off events. [2024-06-28 00:04:13,248 INFO L125 PetriNetUnfolderBase]: For 430758/430758 co-relation queries the response was YES. [2024-06-28 00:04:13,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52872 conditions, 6037 events. 3549/6037 cut-off events. For 430758/430758 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 42806 event pairs, 681 based on Foata normal form. 6/6036 useless extension candidates. Maximal degree in co-relation 52725. Up to 5082 conditions per place. [2024-06-28 00:04:13,360 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 349 selfloop transitions, 59 changer transitions 0/414 dead transitions. [2024-06-28 00:04:13,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 414 transitions, 8370 flow [2024-06-28 00:04:13,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:04:13,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:04:13,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 00:04:13,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-28 00:04:13,361 INFO L175 Difference]: Start difference. First operand has 324 places, 396 transitions, 7501 flow. Second operand 8 states and 142 transitions. [2024-06-28 00:04:13,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 414 transitions, 8370 flow [2024-06-28 00:04:14,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 414 transitions, 7977 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-28 00:04:14,870 INFO L231 Difference]: Finished difference. Result has 325 places, 396 transitions, 7235 flow [2024-06-28 00:04:14,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7108, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7235, PETRI_PLACES=325, PETRI_TRANSITIONS=396} [2024-06-28 00:04:14,871 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-28 00:04:14,871 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 396 transitions, 7235 flow [2024-06-28 00:04:14,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:04:14,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:14,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:14,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 00:04:14,871 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)] === [2024-06-28 00:04:14,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:14,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1498125723, now seen corresponding path program 2 times [2024-06-28 00:04:14,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:14,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61636077] [2024-06-28 00:04:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:14,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:15,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:15,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61636077] [2024-06-28 00:04:15,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61636077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:15,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:15,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:15,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845976280] [2024-06-28 00:04:15,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:15,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:15,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:15,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:15,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:15,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:15,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 396 transitions, 7235 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:15,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:15,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:15,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:16,679 INFO L124 PetriNetUnfolderBase]: 3528/6003 cut-off events. [2024-06-28 00:04:16,679 INFO L125 PetriNetUnfolderBase]: For 414779/414785 co-relation queries the response was YES. [2024-06-28 00:04:16,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51215 conditions, 6003 events. 3528/6003 cut-off events. For 414779/414785 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 42723 event pairs, 1155 based on Foata normal form. 15/6014 useless extension candidates. Maximal degree in co-relation 51070. Up to 5303 conditions per place. [2024-06-28 00:04:16,812 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 378 selfloop transitions, 27 changer transitions 0/412 dead transitions. [2024-06-28 00:04:16,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 412 transitions, 8153 flow [2024-06-28 00:04:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-28 00:04:16,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-28 00:04:16,813 INFO L175 Difference]: Start difference. First operand has 325 places, 396 transitions, 7235 flow. Second operand 7 states and 142 transitions. [2024-06-28 00:04:16,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 412 transitions, 8153 flow [2024-06-28 00:04:17,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 412 transitions, 7961 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 00:04:17,983 INFO L231 Difference]: Finished difference. Result has 325 places, 396 transitions, 7103 flow [2024-06-28 00:04:17,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7043, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7103, PETRI_PLACES=325, PETRI_TRANSITIONS=396} [2024-06-28 00:04:17,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-28 00:04:17,984 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 396 transitions, 7103 flow [2024-06-28 00:04:17,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:17,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:17,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:17,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 00:04:17,984 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)] === [2024-06-28 00:04:17,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:17,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1498119771, now seen corresponding path program 8 times [2024-06-28 00:04:17,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:17,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072026317] [2024-06-28 00:04:17,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:17,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:18,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:18,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072026317] [2024-06-28 00:04:18,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072026317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:18,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:18,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:18,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078488308] [2024-06-28 00:04:18,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:18,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:18,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:18,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:18,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:18,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:18,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 396 transitions, 7103 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:18,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:18,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:18,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:19,659 INFO L124 PetriNetUnfolderBase]: 3515/5988 cut-off events. [2024-06-28 00:04:19,659 INFO L125 PetriNetUnfolderBase]: For 395833/395833 co-relation queries the response was YES. [2024-06-28 00:04:19,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50372 conditions, 5988 events. 3515/5988 cut-off events. For 395833/395833 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 42475 event pairs, 688 based on Foata normal form. 6/5987 useless extension candidates. Maximal degree in co-relation 50227. Up to 4744 conditions per place. [2024-06-28 00:04:19,742 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 321 selfloop transitions, 84 changer transitions 0/412 dead transitions. [2024-06-28 00:04:19,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 412 transitions, 8128 flow [2024-06-28 00:04:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:04:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:04:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-28 00:04:19,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-28 00:04:19,743 INFO L175 Difference]: Start difference. First operand has 325 places, 396 transitions, 7103 flow. Second operand 6 states and 128 transitions. [2024-06-28 00:04:19,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 412 transitions, 8128 flow [2024-06-28 00:04:20,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 412 transitions, 8049 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:20,855 INFO L231 Difference]: Finished difference. Result has 325 places, 397 transitions, 7235 flow [2024-06-28 00:04:20,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7024, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7235, PETRI_PLACES=325, PETRI_TRANSITIONS=397} [2024-06-28 00:04:20,864 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-28 00:04:20,864 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 397 transitions, 7235 flow [2024-06-28 00:04:20,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:20,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:20,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:20,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 00:04:20,865 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)] === [2024-06-28 00:04:20,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:20,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1498119926, now seen corresponding path program 8 times [2024-06-28 00:04:20,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:20,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89650378] [2024-06-28 00:04:20,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:20,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:21,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:21,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89650378] [2024-06-28 00:04:21,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89650378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:21,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:21,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:21,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422162694] [2024-06-28 00:04:21,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:21,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:21,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:21,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:21,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:21,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:21,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 397 transitions, 7235 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:21,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:21,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:21,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:22,517 INFO L124 PetriNetUnfolderBase]: 3486/5952 cut-off events. [2024-06-28 00:04:22,518 INFO L125 PetriNetUnfolderBase]: For 389296/389296 co-relation queries the response was YES. [2024-06-28 00:04:22,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49506 conditions, 5952 events. 3486/5952 cut-off events. For 389296/389296 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 42212 event pairs, 693 based on Foata normal form. 13/5956 useless extension candidates. Maximal degree in co-relation 49360. Up to 4679 conditions per place. [2024-06-28 00:04:22,604 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 324 selfloop transitions, 86 changer transitions 0/417 dead transitions. [2024-06-28 00:04:22,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 417 transitions, 8341 flow [2024-06-28 00:04:22,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:04:22,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:04:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 00:04:22,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-28 00:04:22,605 INFO L175 Difference]: Start difference. First operand has 325 places, 397 transitions, 7235 flow. Second operand 7 states and 146 transitions. [2024-06-28 00:04:22,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 417 transitions, 8341 flow [2024-06-28 00:04:23,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 417 transitions, 8166 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-28 00:04:23,906 INFO L231 Difference]: Finished difference. Result has 329 places, 397 transitions, 7238 flow [2024-06-28 00:04:23,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7238, PETRI_PLACES=329, PETRI_TRANSITIONS=397} [2024-06-28 00:04:23,907 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-28 00:04:23,907 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 397 transitions, 7238 flow [2024-06-28 00:04:23,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:23,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:23,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:23,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 00:04:23,907 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)] === [2024-06-28 00:04:23,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:23,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1123848240, now seen corresponding path program 9 times [2024-06-28 00:04:23,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:23,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092570183] [2024-06-28 00:04:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:23,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:24,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:24,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092570183] [2024-06-28 00:04:24,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092570183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:24,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:24,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:24,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433134897] [2024-06-28 00:04:24,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:24,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:24,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:24,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:24,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:24,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:24,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 397 transitions, 7238 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:24,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:24,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:24,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:25,670 INFO L124 PetriNetUnfolderBase]: 3653/6213 cut-off events. [2024-06-28 00:04:25,670 INFO L125 PetriNetUnfolderBase]: For 428094/428100 co-relation queries the response was YES. [2024-06-28 00:04:25,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53147 conditions, 6213 events. 3653/6213 cut-off events. For 428094/428100 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 44113 event pairs, 685 based on Foata normal form. 7/6213 useless extension candidates. Maximal degree in co-relation 53000. Up to 4987 conditions per place. [2024-06-28 00:04:25,760 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 359 selfloop transitions, 81 changer transitions 0/447 dead transitions. [2024-06-28 00:04:25,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 447 transitions, 8875 flow [2024-06-28 00:04:25,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:04:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:04:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-28 00:04:25,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020833333333333 [2024-06-28 00:04:25,761 INFO L175 Difference]: Start difference. First operand has 329 places, 397 transitions, 7238 flow. Second operand 12 states and 241 transitions. [2024-06-28 00:04:25,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 447 transitions, 8875 flow [2024-06-28 00:04:27,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 447 transitions, 8707 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 00:04:27,045 INFO L231 Difference]: Finished difference. Result has 337 places, 407 transitions, 7483 flow [2024-06-28 00:04:27,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7070, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7483, PETRI_PLACES=337, PETRI_TRANSITIONS=407} [2024-06-28 00:04:27,045 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-28 00:04:27,045 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 407 transitions, 7483 flow [2024-06-28 00:04:27,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:27,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:27,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:27,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 00:04:27,046 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)] === [2024-06-28 00:04:27,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:27,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1123519950, now seen corresponding path program 10 times [2024-06-28 00:04:27,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:27,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588482741] [2024-06-28 00:04:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:27,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:27,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:27,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588482741] [2024-06-28 00:04:27,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588482741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:27,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:27,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:27,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805917004] [2024-06-28 00:04:27,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:27,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:27,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:27,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:27,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:27,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:27,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 407 transitions, 7483 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:27,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:27,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:27,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:28,845 INFO L124 PetriNetUnfolderBase]: 3640/6177 cut-off events. [2024-06-28 00:04:28,845 INFO L125 PetriNetUnfolderBase]: For 445656/445662 co-relation queries the response was YES. [2024-06-28 00:04:28,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53856 conditions, 6177 events. 3640/6177 cut-off events. For 445656/445662 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 43871 event pairs, 654 based on Foata normal form. 11/6181 useless extension candidates. Maximal degree in co-relation 53707. Up to 4984 conditions per place. [2024-06-28 00:04:28,942 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 353 selfloop transitions, 82 changer transitions 0/442 dead transitions. [2024-06-28 00:04:28,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 442 transitions, 8788 flow [2024-06-28 00:04:28,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:04:28,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:04:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-28 00:04:28,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-28 00:04:28,944 INFO L175 Difference]: Start difference. First operand has 337 places, 407 transitions, 7483 flow. Second operand 10 states and 205 transitions. [2024-06-28 00:04:28,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 442 transitions, 8788 flow [2024-06-28 00:04:30,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 442 transitions, 8508 flow, removed 98 selfloop flow, removed 7 redundant places. [2024-06-28 00:04:30,370 INFO L231 Difference]: Finished difference. Result has 341 places, 411 transitions, 7442 flow [2024-06-28 00:04:30,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7219, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7442, PETRI_PLACES=341, PETRI_TRANSITIONS=411} [2024-06-28 00:04:30,371 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-28 00:04:30,371 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 411 transitions, 7442 flow [2024-06-28 00:04:30,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:30,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:30,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:30,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 00:04:30,372 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)] === [2024-06-28 00:04:30,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:30,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1129071275, now seen corresponding path program 9 times [2024-06-28 00:04:30,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:30,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190909964] [2024-06-28 00:04:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:30,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:30,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:30,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190909964] [2024-06-28 00:04:30,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190909964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:30,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:30,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:30,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975417709] [2024-06-28 00:04:30,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:30,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:30,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:30,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:30,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:30,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:30,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 411 transitions, 7442 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:30,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:30,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:30,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:32,267 INFO L124 PetriNetUnfolderBase]: 3648/6193 cut-off events. [2024-06-28 00:04:32,267 INFO L125 PetriNetUnfolderBase]: For 447983/447989 co-relation queries the response was YES. [2024-06-28 00:04:32,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54117 conditions, 6193 events. 3648/6193 cut-off events. For 447983/447989 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 43956 event pairs, 653 based on Foata normal form. 8/6192 useless extension candidates. Maximal degree in co-relation 53965. Up to 5207 conditions per place. [2024-06-28 00:04:32,351 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 360 selfloop transitions, 73 changer transitions 0/440 dead transitions. [2024-06-28 00:04:32,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 440 transitions, 8696 flow [2024-06-28 00:04:32,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:04:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:04:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-28 00:04:32,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027777777777778 [2024-06-28 00:04:32,353 INFO L175 Difference]: Start difference. First operand has 341 places, 411 transitions, 7442 flow. Second operand 9 states and 181 transitions. [2024-06-28 00:04:32,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 440 transitions, 8696 flow [2024-06-28 00:04:33,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 440 transitions, 8544 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:33,807 INFO L231 Difference]: Finished difference. Result has 344 places, 415 transitions, 7600 flow [2024-06-28 00:04:33,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7290, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7600, PETRI_PLACES=344, PETRI_TRANSITIONS=415} [2024-06-28 00:04:33,807 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-28 00:04:33,807 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 415 transitions, 7600 flow [2024-06-28 00:04:33,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:33,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:33,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:33,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 00:04:33,808 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)] === [2024-06-28 00:04:33,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:33,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2081515143, now seen corresponding path program 3 times [2024-06-28 00:04:33,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:33,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711860274] [2024-06-28 00:04:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:33,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:34,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:34,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711860274] [2024-06-28 00:04:34,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711860274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:34,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:34,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:34,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519417856] [2024-06-28 00:04:34,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:34,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:34,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:34,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:34,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:34,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:34,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 415 transitions, 7600 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:34,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:34,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:34,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:35,723 INFO L124 PetriNetUnfolderBase]: 3742/6368 cut-off events. [2024-06-28 00:04:35,723 INFO L125 PetriNetUnfolderBase]: For 488440/488452 co-relation queries the response was YES. [2024-06-28 00:04:35,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55515 conditions, 6368 events. 3742/6368 cut-off events. For 488440/488452 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 45857 event pairs, 1134 based on Foata normal form. 21/6378 useless extension candidates. Maximal degree in co-relation 55362. Up to 5587 conditions per place. [2024-06-28 00:04:35,827 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 414 selfloop transitions, 30 changer transitions 0/451 dead transitions. [2024-06-28 00:04:35,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 451 transitions, 8780 flow [2024-06-28 00:04:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:04:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:04:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-28 00:04:35,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-28 00:04:35,828 INFO L175 Difference]: Start difference. First operand has 344 places, 415 transitions, 7600 flow. Second operand 9 states and 184 transitions. [2024-06-28 00:04:35,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 451 transitions, 8780 flow [2024-06-28 00:04:37,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 451 transitions, 8434 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:37,440 INFO L231 Difference]: Finished difference. Result has 349 places, 419 transitions, 7402 flow [2024-06-28 00:04:37,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7254, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7402, PETRI_PLACES=349, PETRI_TRANSITIONS=419} [2024-06-28 00:04:37,441 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-28 00:04:37,441 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 419 transitions, 7402 flow [2024-06-28 00:04:37,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:37,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:37,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:37,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 00:04:37,442 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)] === [2024-06-28 00:04:37,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:37,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2075824256, now seen corresponding path program 11 times [2024-06-28 00:04:37,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:37,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135595952] [2024-06-28 00:04:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:37,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:37,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:37,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135595952] [2024-06-28 00:04:37,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135595952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:37,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:37,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:37,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690259034] [2024-06-28 00:04:37,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:37,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:37,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:37,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:37,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:37,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:37,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 419 transitions, 7402 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:37,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:37,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:37,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:39,362 INFO L124 PetriNetUnfolderBase]: 3861/6553 cut-off events. [2024-06-28 00:04:39,362 INFO L125 PetriNetUnfolderBase]: For 535571/535577 co-relation queries the response was YES. [2024-06-28 00:04:39,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57420 conditions, 6553 events. 3861/6553 cut-off events. For 535571/535577 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 46936 event pairs, 733 based on Foata normal form. 21/6563 useless extension candidates. Maximal degree in co-relation 57265. Up to 5352 conditions per place. [2024-06-28 00:04:39,471 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 380 selfloop transitions, 72 changer transitions 0/459 dead transitions. [2024-06-28 00:04:39,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 459 transitions, 8828 flow [2024-06-28 00:04:39,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:04:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:04:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-28 00:04:39,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:04:39,473 INFO L175 Difference]: Start difference. First operand has 349 places, 419 transitions, 7402 flow. Second operand 11 states and 220 transitions. [2024-06-28 00:04:39,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 459 transitions, 8828 flow [2024-06-28 00:04:41,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 459 transitions, 8756 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 00:04:41,214 INFO L231 Difference]: Finished difference. Result has 356 places, 422 transitions, 7529 flow [2024-06-28 00:04:41,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7330, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7529, PETRI_PLACES=356, PETRI_TRANSITIONS=422} [2024-06-28 00:04:41,216 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-28 00:04:41,216 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 422 transitions, 7529 flow [2024-06-28 00:04:41,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:41,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:41,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:41,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 00:04:41,216 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)] === [2024-06-28 00:04:41,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:41,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1937594806, now seen corresponding path program 12 times [2024-06-28 00:04:41,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:41,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774229247] [2024-06-28 00:04:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:41,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:41,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:41,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774229247] [2024-06-28 00:04:41,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774229247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:41,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:41,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:41,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800153733] [2024-06-28 00:04:41,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:41,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:41,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:41,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:41,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:41,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:41,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 422 transitions, 7529 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:41,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:41,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:41,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:43,059 INFO L124 PetriNetUnfolderBase]: 3822/6481 cut-off events. [2024-06-28 00:04:43,060 INFO L125 PetriNetUnfolderBase]: For 501188/501194 co-relation queries the response was YES. [2024-06-28 00:04:43,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55885 conditions, 6481 events. 3822/6481 cut-off events. For 501188/501194 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 46322 event pairs, 710 based on Foata normal form. 23/6495 useless extension candidates. Maximal degree in co-relation 55728. Up to 5491 conditions per place. [2024-06-28 00:04:43,173 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 370 selfloop transitions, 67 changer transitions 0/444 dead transitions. [2024-06-28 00:04:43,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 444 transitions, 8583 flow [2024-06-28 00:04:43,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:04:43,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:04:43,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 00:04:43,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509375 [2024-06-28 00:04:43,174 INFO L175 Difference]: Start difference. First operand has 356 places, 422 transitions, 7529 flow. Second operand 8 states and 163 transitions. [2024-06-28 00:04:43,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 444 transitions, 8583 flow [2024-06-28 00:04:44,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 444 transitions, 8455 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-28 00:04:44,933 INFO L231 Difference]: Finished difference. Result has 357 places, 422 transitions, 7541 flow [2024-06-28 00:04:44,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7401, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7541, PETRI_PLACES=357, PETRI_TRANSITIONS=422} [2024-06-28 00:04:44,934 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-28 00:04:44,934 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 422 transitions, 7541 flow [2024-06-28 00:04:44,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:44,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:44,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:44,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 00:04:44,934 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)] === [2024-06-28 00:04:44,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:44,934 INFO L85 PathProgramCache]: Analyzing trace with hash 825276901, now seen corresponding path program 4 times [2024-06-28 00:04:44,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:44,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075794257] [2024-06-28 00:04:44,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:44,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:45,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:45,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075794257] [2024-06-28 00:04:45,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075794257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:45,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:45,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:45,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058239684] [2024-06-28 00:04:45,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:45,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:45,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:45,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:45,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:45,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:45,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 422 transitions, 7541 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:45,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:45,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:45,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:46,971 INFO L124 PetriNetUnfolderBase]: 3855/6582 cut-off events. [2024-06-28 00:04:46,971 INFO L125 PetriNetUnfolderBase]: For 497310/497322 co-relation queries the response was YES. [2024-06-28 00:04:47,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56593 conditions, 6582 events. 3855/6582 cut-off events. For 497310/497322 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 47946 event pairs, 1110 based on Foata normal form. 21/6595 useless extension candidates. Maximal degree in co-relation 56434. Up to 5520 conditions per place. [2024-06-28 00:04:47,072 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 404 selfloop transitions, 44 changer transitions 0/455 dead transitions. [2024-06-28 00:04:47,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 455 transitions, 8673 flow [2024-06-28 00:04:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:04:47,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:04:47,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 00:04:47,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-28 00:04:47,073 INFO L175 Difference]: Start difference. First operand has 357 places, 422 transitions, 7541 flow. Second operand 8 states and 168 transitions. [2024-06-28 00:04:47,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 455 transitions, 8673 flow [2024-06-28 00:04:48,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 455 transitions, 8543 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:48,611 INFO L231 Difference]: Finished difference. Result has 359 places, 423 transitions, 7539 flow [2024-06-28 00:04:48,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7411, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7539, PETRI_PLACES=359, PETRI_TRANSITIONS=423} [2024-06-28 00:04:48,612 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-28 00:04:48,612 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 423 transitions, 7539 flow [2024-06-28 00:04:48,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:48,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:48,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:48,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 00:04:48,612 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)] === [2024-06-28 00:04:48,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:48,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1794696962, now seen corresponding path program 13 times [2024-06-28 00:04:48,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:48,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312115863] [2024-06-28 00:04:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:48,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:49,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:49,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312115863] [2024-06-28 00:04:49,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312115863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:49,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:49,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:49,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127869179] [2024-06-28 00:04:49,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:49,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:49,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:49,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:49,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:49,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:49,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 423 transitions, 7539 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:49,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:49,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:49,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:51,003 INFO L124 PetriNetUnfolderBase]: 4308/7344 cut-off events. [2024-06-28 00:04:51,004 INFO L125 PetriNetUnfolderBase]: For 641484/641490 co-relation queries the response was YES. [2024-06-28 00:04:51,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65266 conditions, 7344 events. 4308/7344 cut-off events. For 641484/641490 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 53862 event pairs, 599 based on Foata normal form. 10/7349 useless extension candidates. Maximal degree in co-relation 65106. Up to 4045 conditions per place. [2024-06-28 00:04:51,108 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 347 selfloop transitions, 138 changer transitions 0/492 dead transitions. [2024-06-28 00:04:51,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 492 transitions, 9470 flow [2024-06-28 00:04:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:04:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:04:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-28 00:04:51,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-28 00:04:51,109 INFO L175 Difference]: Start difference. First operand has 359 places, 423 transitions, 7539 flow. Second operand 12 states and 258 transitions. [2024-06-28 00:04:51,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 492 transitions, 9470 flow [2024-06-28 00:04:52,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 492 transitions, 9356 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 00:04:52,822 INFO L231 Difference]: Finished difference. Result has 368 places, 438 transitions, 8067 flow [2024-06-28 00:04:52,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7425, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8067, PETRI_PLACES=368, PETRI_TRANSITIONS=438} [2024-06-28 00:04:52,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-28 00:04:52,823 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 438 transitions, 8067 flow [2024-06-28 00:04:52,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:52,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:52,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:52,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 00:04:52,823 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)] === [2024-06-28 00:04:52,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:52,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1795025469, now seen corresponding path program 5 times [2024-06-28 00:04:52,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:52,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073834671] [2024-06-28 00:04:52,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:52,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:53,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:53,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073834671] [2024-06-28 00:04:53,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073834671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:53,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:53,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:53,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507450010] [2024-06-28 00:04:53,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:53,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:53,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:53,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:53,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:53,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:53,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 438 transitions, 8067 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:53,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:53,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:53,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:55,159 INFO L124 PetriNetUnfolderBase]: 4341/7414 cut-off events. [2024-06-28 00:04:55,160 INFO L125 PetriNetUnfolderBase]: For 697235/697247 co-relation queries the response was YES. [2024-06-28 00:04:55,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68350 conditions, 7414 events. 4341/7414 cut-off events. For 697235/697247 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 54985 event pairs, 1259 based on Foata normal form. 21/7423 useless extension candidates. Maximal degree in co-relation 68186. Up to 6311 conditions per place. [2024-06-28 00:04:55,263 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 423 selfloop transitions, 47 changer transitions 0/477 dead transitions. [2024-06-28 00:04:55,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 477 transitions, 9327 flow [2024-06-28 00:04:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:04:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:04:55,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-28 00:04:55,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-28 00:04:55,264 INFO L175 Difference]: Start difference. First operand has 368 places, 438 transitions, 8067 flow. Second operand 9 states and 190 transitions. [2024-06-28 00:04:55,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 477 transitions, 9327 flow [2024-06-28 00:04:57,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 477 transitions, 9060 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-28 00:04:57,141 INFO L231 Difference]: Finished difference. Result has 372 places, 439 transitions, 7938 flow [2024-06-28 00:04:57,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7800, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7938, PETRI_PLACES=372, PETRI_TRANSITIONS=439} [2024-06-28 00:04:57,142 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 331 predicate places. [2024-06-28 00:04:57,142 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 439 transitions, 7938 flow [2024-06-28 00:04:57,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:57,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:04:57,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:04:57,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 00:04:57,142 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)] === [2024-06-28 00:04:57,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:04:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2129044094, now seen corresponding path program 14 times [2024-06-28 00:04:57,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:04:57,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746757496] [2024-06-28 00:04:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:04:57,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:04:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:04:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:04:57,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:04:57,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746757496] [2024-06-28 00:04:57,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746757496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:04:57,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:04:57,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:04:57,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139020345] [2024-06-28 00:04:57,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:04:57,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:04:57,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:04:57,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:04:57,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:04:57,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:04:57,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 439 transitions, 7938 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:04:57,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:04:57,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:04:57,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:04:59,323 INFO L124 PetriNetUnfolderBase]: 4312/7360 cut-off events. [2024-06-28 00:04:59,323 INFO L125 PetriNetUnfolderBase]: For 670261/670267 co-relation queries the response was YES. [2024-06-28 00:04:59,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66394 conditions, 7360 events. 4312/7360 cut-off events. For 670261/670267 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 54089 event pairs, 628 based on Foata normal form. 18/7373 useless extension candidates. Maximal degree in co-relation 66229. Up to 4093 conditions per place. [2024-06-28 00:04:59,632 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 351 selfloop transitions, 122 changer transitions 0/480 dead transitions. [2024-06-28 00:04:59,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 480 transitions, 9402 flow [2024-06-28 00:04:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:04:59,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:04:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-28 00:04:59,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-28 00:04:59,633 INFO L175 Difference]: Start difference. First operand has 372 places, 439 transitions, 7938 flow. Second operand 9 states and 199 transitions. [2024-06-28 00:04:59,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 480 transitions, 9402 flow [2024-06-28 00:05:01,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 480 transitions, 9251 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 00:05:01,613 INFO L231 Difference]: Finished difference. Result has 375 places, 439 transitions, 8051 flow [2024-06-28 00:05:01,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8051, PETRI_PLACES=375, PETRI_TRANSITIONS=439} [2024-06-28 00:05:01,614 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-28 00:05:01,614 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 439 transitions, 8051 flow [2024-06-28 00:05:01,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:01,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:01,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:01,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 00:05:01,615 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)] === [2024-06-28 00:05:01,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:01,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2115889957, now seen corresponding path program 6 times [2024-06-28 00:05:01,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:01,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889385564] [2024-06-28 00:05:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:01,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:02,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:02,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889385564] [2024-06-28 00:05:02,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889385564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:02,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:02,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:02,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729756353] [2024-06-28 00:05:02,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:02,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:02,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:02,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:02,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:02,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:05:02,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 439 transitions, 8051 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:02,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:02,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:05:02,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:03,893 INFO L124 PetriNetUnfolderBase]: 4432/7560 cut-off events. [2024-06-28 00:05:03,893 INFO L125 PetriNetUnfolderBase]: For 724490/724502 co-relation queries the response was YES. [2024-06-28 00:05:03,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69445 conditions, 7560 events. 4432/7560 cut-off events. For 724490/724502 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 56223 event pairs, 1165 based on Foata normal form. 21/7565 useless extension candidates. Maximal degree in co-relation 69279. Up to 5693 conditions per place. [2024-06-28 00:05:04,032 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 382 selfloop transitions, 93 changer transitions 0/482 dead transitions. [2024-06-28 00:05:04,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 482 transitions, 9814 flow [2024-06-28 00:05:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:05:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:05:04,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-28 00:05:04,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-06-28 00:05:04,033 INFO L175 Difference]: Start difference. First operand has 375 places, 439 transitions, 8051 flow. Second operand 9 states and 194 transitions. [2024-06-28 00:05:04,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 482 transitions, 9814 flow [2024-06-28 00:05:06,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 482 transitions, 9531 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-28 00:05:06,579 INFO L231 Difference]: Finished difference. Result has 374 places, 442 transitions, 8088 flow [2024-06-28 00:05:06,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7788, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8088, PETRI_PLACES=374, PETRI_TRANSITIONS=442} [2024-06-28 00:05:06,581 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2024-06-28 00:05:06,581 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 442 transitions, 8088 flow [2024-06-28 00:05:06,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:06,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:06,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:06,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 00:05:06,581 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)] === [2024-06-28 00:05:06,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:06,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2116156867, now seen corresponding path program 7 times [2024-06-28 00:05:06,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:06,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734576591] [2024-06-28 00:05:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:06,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:07,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:07,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734576591] [2024-06-28 00:05:07,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734576591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:07,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:07,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:07,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956355898] [2024-06-28 00:05:07,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:07,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:07,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:07,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:05:07,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 442 transitions, 8088 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:07,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:07,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:05:07,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:08,756 INFO L124 PetriNetUnfolderBase]: 4411/7538 cut-off events. [2024-06-28 00:05:08,756 INFO L125 PetriNetUnfolderBase]: For 663485/663497 co-relation queries the response was YES. [2024-06-28 00:05:09,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67403 conditions, 7538 events. 4411/7538 cut-off events. For 663485/663497 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 56094 event pairs, 1196 based on Foata normal form. 21/7543 useless extension candidates. Maximal degree in co-relation 67238. Up to 5684 conditions per place. [2024-06-28 00:05:09,063 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 382 selfloop transitions, 94 changer transitions 0/483 dead transitions. [2024-06-28 00:05:09,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 483 transitions, 9615 flow [2024-06-28 00:05:09,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:05:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:05:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-28 00:05:09,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-28 00:05:09,064 INFO L175 Difference]: Start difference. First operand has 374 places, 442 transitions, 8088 flow. Second operand 10 states and 210 transitions. [2024-06-28 00:05:09,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 483 transitions, 9615 flow [2024-06-28 00:05:10,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 483 transitions, 9466 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 00:05:10,990 INFO L231 Difference]: Finished difference. Result has 380 places, 442 transitions, 8131 flow [2024-06-28 00:05:10,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7939, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8131, PETRI_PLACES=380, PETRI_TRANSITIONS=442} [2024-06-28 00:05:10,991 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2024-06-28 00:05:10,991 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 442 transitions, 8131 flow [2024-06-28 00:05:10,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:10,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:10,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:10,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 00:05:10,991 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)] === [2024-06-28 00:05:10,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:10,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2116157084, now seen corresponding path program 15 times [2024-06-28 00:05:10,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:10,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268138500] [2024-06-28 00:05:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:10,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:11,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:11,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268138500] [2024-06-28 00:05:11,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268138500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:11,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:11,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:11,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082869528] [2024-06-28 00:05:11,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:11,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:11,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:11,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:11,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:11,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:05:11,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 442 transitions, 8131 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:11,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:11,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:05:11,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:13,469 INFO L124 PetriNetUnfolderBase]: 4532/7728 cut-off events. [2024-06-28 00:05:13,469 INFO L125 PetriNetUnfolderBase]: For 712389/712395 co-relation queries the response was YES. [2024-06-28 00:05:13,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70881 conditions, 7728 events. 4532/7728 cut-off events. For 712389/712395 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 57469 event pairs, 665 based on Foata normal form. 11/7734 useless extension candidates. Maximal degree in co-relation 70714. Up to 2956 conditions per place. [2024-06-28 00:05:13,587 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 243 selfloop transitions, 250 changer transitions 0/500 dead transitions. [2024-06-28 00:05:13,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 500 transitions, 10519 flow [2024-06-28 00:05:13,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:05:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:05:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-28 00:05:13,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-28 00:05:13,589 INFO L175 Difference]: Start difference. First operand has 380 places, 442 transitions, 8131 flow. Second operand 11 states and 231 transitions. [2024-06-28 00:05:13,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 500 transitions, 10519 flow [2024-06-28 00:05:15,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 500 transitions, 10317 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-28 00:05:15,808 INFO L231 Difference]: Finished difference. Result has 383 places, 449 transitions, 8757 flow [2024-06-28 00:05:15,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7929, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8757, PETRI_PLACES=383, PETRI_TRANSITIONS=449} [2024-06-28 00:05:15,808 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-28 00:05:15,809 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 449 transitions, 8757 flow [2024-06-28 00:05:15,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:15,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:15,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:15,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 00:05:15,809 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)] === [2024-06-28 00:05:15,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash -2106452183, now seen corresponding path program 10 times [2024-06-28 00:05:15,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:15,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251517595] [2024-06-28 00:05:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:15,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:16,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:16,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251517595] [2024-06-28 00:05:16,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251517595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:16,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:16,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:16,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607470465] [2024-06-28 00:05:16,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:16,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:16,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:16,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:16,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:05:16,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 449 transitions, 8757 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:16,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:16,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:05:16,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:18,116 INFO L124 PetriNetUnfolderBase]: 4547/7743 cut-off events. [2024-06-28 00:05:18,116 INFO L125 PetriNetUnfolderBase]: For 739111/739117 co-relation queries the response was YES. [2024-06-28 00:05:18,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73580 conditions, 7743 events. 4547/7743 cut-off events. For 739111/739117 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 57348 event pairs, 867 based on Foata normal form. 8/7728 useless extension candidates. Maximal degree in co-relation 73411. Up to 5721 conditions per place. [2024-06-28 00:05:18,257 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 305 selfloop transitions, 162 changer transitions 0/474 dead transitions. [2024-06-28 00:05:18,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 474 transitions, 10167 flow [2024-06-28 00:05:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-28 00:05:18,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-28 00:05:18,258 INFO L175 Difference]: Start difference. First operand has 383 places, 449 transitions, 8757 flow. Second operand 7 states and 147 transitions. [2024-06-28 00:05:18,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 474 transitions, 10167 flow [2024-06-28 00:05:20,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 474 transitions, 9754 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-28 00:05:20,569 INFO L231 Difference]: Finished difference. Result has 385 places, 453 transitions, 8975 flow [2024-06-28 00:05:20,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8344, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8975, PETRI_PLACES=385, PETRI_TRANSITIONS=453} [2024-06-28 00:05:20,570 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-28 00:05:20,570 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 453 transitions, 8975 flow [2024-06-28 00:05:20,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:20,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:20,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:20,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 00:05:20,571 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)] === [2024-06-28 00:05:20,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:20,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2106451811, now seen corresponding path program 7 times [2024-06-28 00:05:20,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:20,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834565190] [2024-06-28 00:05:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:20,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:20,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:20,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834565190] [2024-06-28 00:05:20,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834565190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:20,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:20,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:20,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789952701] [2024-06-28 00:05:20,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:20,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:20,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:20,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:20,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:20,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:05:20,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 453 transitions, 8975 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:20,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:20,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:05:20,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:22,778 INFO L124 PetriNetUnfolderBase]: 4562/7779 cut-off events. [2024-06-28 00:05:22,778 INFO L125 PetriNetUnfolderBase]: For 775086/775092 co-relation queries the response was YES. [2024-06-28 00:05:22,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74871 conditions, 7779 events. 4562/7779 cut-off events. For 775086/775092 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 57843 event pairs, 909 based on Foata normal form. 8/7770 useless extension candidates. Maximal degree in co-relation 74700. Up to 5712 conditions per place. [2024-06-28 00:05:22,890 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 322 selfloop transitions, 159 changer transitions 0/488 dead transitions. [2024-06-28 00:05:22,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 488 transitions, 10772 flow [2024-06-28 00:05:22,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:22,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 00:05:22,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-28 00:05:22,891 INFO L175 Difference]: Start difference. First operand has 385 places, 453 transitions, 8975 flow. Second operand 7 states and 150 transitions. [2024-06-28 00:05:22,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 488 transitions, 10772 flow [2024-06-28 00:05:25,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 488 transitions, 10546 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-28 00:05:25,086 INFO L231 Difference]: Finished difference. Result has 390 places, 464 transitions, 9513 flow [2024-06-28 00:05:25,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8751, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9513, PETRI_PLACES=390, PETRI_TRANSITIONS=464} [2024-06-28 00:05:25,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 349 predicate places. [2024-06-28 00:05:25,087 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 464 transitions, 9513 flow [2024-06-28 00:05:25,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:25,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:25,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:25,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 00:05:25,087 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)] === [2024-06-28 00:05:25,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2106452028, now seen corresponding path program 16 times [2024-06-28 00:05:25,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:25,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741034377] [2024-06-28 00:05:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:25,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:25,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:25,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741034377] [2024-06-28 00:05:25,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741034377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:25,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:25,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:25,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703856373] [2024-06-28 00:05:25,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:25,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:25,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:25,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:25,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:25,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:05:25,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 464 transitions, 9513 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:25,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:25,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:05:25,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:27,268 INFO L124 PetriNetUnfolderBase]: 4599/7835 cut-off events. [2024-06-28 00:05:27,268 INFO L125 PetriNetUnfolderBase]: For 827650/827656 co-relation queries the response was YES. [2024-06-28 00:05:27,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76594 conditions, 7835 events. 4599/7835 cut-off events. For 827650/827656 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 58374 event pairs, 981 based on Foata normal form. 19/7837 useless extension candidates. Maximal degree in co-relation 76420. Up to 6014 conditions per place. [2024-06-28 00:05:27,403 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 326 selfloop transitions, 157 changer transitions 0/490 dead transitions. [2024-06-28 00:05:27,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 490 transitions, 10906 flow [2024-06-28 00:05:27,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:27,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:27,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-28 00:05:27,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-28 00:05:27,404 INFO L175 Difference]: Start difference. First operand has 390 places, 464 transitions, 9513 flow. Second operand 8 states and 165 transitions. [2024-06-28 00:05:27,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 490 transitions, 10906 flow [2024-06-28 00:05:29,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 490 transitions, 10772 flow, removed 67 selfloop flow, removed 0 redundant places. [2024-06-28 00:05:29,926 INFO L231 Difference]: Finished difference. Result has 398 places, 465 transitions, 9716 flow [2024-06-28 00:05:29,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9379, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9716, PETRI_PLACES=398, PETRI_TRANSITIONS=465} [2024-06-28 00:05:29,927 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2024-06-28 00:05:29,927 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 465 transitions, 9716 flow [2024-06-28 00:05:29,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:29,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:29,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:29,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 00:05:29,928 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)] === [2024-06-28 00:05:29,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:29,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1274200573, now seen corresponding path program 2 times [2024-06-28 00:05:29,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:29,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083793592] [2024-06-28 00:05:29,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:29,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:30,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:30,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083793592] [2024-06-28 00:05:30,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083793592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:30,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:30,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:30,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771699748] [2024-06-28 00:05:30,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:30,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:30,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:30,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:30,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:30,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:05:30,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 465 transitions, 9716 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:30,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:30,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:05:30,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:32,311 INFO L124 PetriNetUnfolderBase]: 4607/7852 cut-off events. [2024-06-28 00:05:32,311 INFO L125 PetriNetUnfolderBase]: For 819990/819996 co-relation queries the response was YES. [2024-06-28 00:05:32,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77381 conditions, 7852 events. 4607/7852 cut-off events. For 819990/819996 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 58777 event pairs, 1463 based on Foata normal form. 8/7846 useless extension candidates. Maximal degree in co-relation 77203. Up to 7026 conditions per place. [2024-06-28 00:05:32,433 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 435 selfloop transitions, 42 changer transitions 0/483 dead transitions. [2024-06-28 00:05:32,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 483 transitions, 10825 flow [2024-06-28 00:05:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-28 00:05:32,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-28 00:05:32,434 INFO L175 Difference]: Start difference. First operand has 398 places, 465 transitions, 9716 flow. Second operand 7 states and 135 transitions. [2024-06-28 00:05:32,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 483 transitions, 10825 flow [2024-06-28 00:05:34,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 483 transitions, 10505 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 00:05:34,709 INFO L231 Difference]: Finished difference. Result has 399 places, 467 transitions, 9552 flow [2024-06-28 00:05:34,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9396, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9552, PETRI_PLACES=399, PETRI_TRANSITIONS=467} [2024-06-28 00:05:34,709 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 358 predicate places. [2024-06-28 00:05:34,709 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 467 transitions, 9552 flow [2024-06-28 00:05:34,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:34,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:34,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:34,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 00:05:34,710 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)] === [2024-06-28 00:05:34,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:34,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1024604443, now seen corresponding path program 3 times [2024-06-28 00:05:34,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:34,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914423110] [2024-06-28 00:05:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:34,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:35,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:35,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914423110] [2024-06-28 00:05:35,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914423110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:35,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:35,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:35,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944179774] [2024-06-28 00:05:35,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:35,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:35,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:35,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:35,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:35,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:05:35,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 467 transitions, 9552 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:35,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:35,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:05:35,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:37,065 INFO L124 PetriNetUnfolderBase]: 4615/7866 cut-off events. [2024-06-28 00:05:37,066 INFO L125 PetriNetUnfolderBase]: For 827734/827740 co-relation queries the response was YES. [2024-06-28 00:05:37,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77100 conditions, 7866 events. 4615/7866 cut-off events. For 827734/827740 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 58949 event pairs, 1437 based on Foata normal form. 8/7860 useless extension candidates. Maximal degree in co-relation 76921. Up to 7071 conditions per place. [2024-06-28 00:05:37,213 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 448 selfloop transitions, 30 changer transitions 0/484 dead transitions. [2024-06-28 00:05:37,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 484 transitions, 10656 flow [2024-06-28 00:05:37,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 00:05:37,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-28 00:05:37,215 INFO L175 Difference]: Start difference. First operand has 399 places, 467 transitions, 9552 flow. Second operand 8 states and 145 transitions. [2024-06-28 00:05:37,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 484 transitions, 10656 flow [2024-06-28 00:05:39,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 484 transitions, 10542 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 00:05:39,449 INFO L231 Difference]: Finished difference. Result has 402 places, 469 transitions, 9574 flow [2024-06-28 00:05:39,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9438, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9574, PETRI_PLACES=402, PETRI_TRANSITIONS=469} [2024-06-28 00:05:39,449 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-28 00:05:39,449 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 469 transitions, 9574 flow [2024-06-28 00:05:39,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:39,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:39,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:39,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 00:05:39,449 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)] === [2024-06-28 00:05:39,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:39,450 INFO L85 PathProgramCache]: Analyzing trace with hash 12828049, now seen corresponding path program 4 times [2024-06-28 00:05:39,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:39,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782257344] [2024-06-28 00:05:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:39,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:40,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:40,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782257344] [2024-06-28 00:05:40,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782257344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:40,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:40,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:05:40,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859828908] [2024-06-28 00:05:40,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:40,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:05:40,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:40,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:05:40,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:05:40,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:05:40,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 469 transitions, 9574 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:40,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:40,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:05:40,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:42,078 INFO L124 PetriNetUnfolderBase]: 4610/7857 cut-off events. [2024-06-28 00:05:42,078 INFO L125 PetriNetUnfolderBase]: For 835130/835136 co-relation queries the response was YES. [2024-06-28 00:05:42,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77022 conditions, 7857 events. 4610/7857 cut-off events. For 835130/835136 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 58872 event pairs, 1427 based on Foata normal form. 8/7851 useless extension candidates. Maximal degree in co-relation 76841. Up to 6917 conditions per place. [2024-06-28 00:05:42,214 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 418 selfloop transitions, 65 changer transitions 0/489 dead transitions. [2024-06-28 00:05:42,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 489 transitions, 10742 flow [2024-06-28 00:05:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:05:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:05:42,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-28 00:05:42,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175 [2024-06-28 00:05:42,219 INFO L175 Difference]: Start difference. First operand has 402 places, 469 transitions, 9574 flow. Second operand 10 states and 167 transitions. [2024-06-28 00:05:42,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 489 transitions, 10742 flow [2024-06-28 00:05:44,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 489 transitions, 10608 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-28 00:05:44,738 INFO L231 Difference]: Finished difference. Result has 405 places, 471 transitions, 9658 flow [2024-06-28 00:05:44,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9440, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9658, PETRI_PLACES=405, PETRI_TRANSITIONS=471} [2024-06-28 00:05:44,738 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-28 00:05:44,739 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 471 transitions, 9658 flow [2024-06-28 00:05:44,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:05:44,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:44,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:44,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 00:05:44,739 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)] === [2024-06-28 00:05:44,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:44,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1433208357, now seen corresponding path program 11 times [2024-06-28 00:05:44,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:44,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779937108] [2024-06-28 00:05:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:44,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:45,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:45,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779937108] [2024-06-28 00:05:45,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779937108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:45,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:45,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:45,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842503595] [2024-06-28 00:05:45,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:45,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:45,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:45,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:45,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:45,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:05:45,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 471 transitions, 9658 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:45,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:45,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:05:45,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:46,938 INFO L124 PetriNetUnfolderBase]: 4630/7900 cut-off events. [2024-06-28 00:05:46,938 INFO L125 PetriNetUnfolderBase]: For 866584/866584 co-relation queries the response was YES. [2024-06-28 00:05:47,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77580 conditions, 7900 events. 4630/7900 cut-off events. For 866584/866584 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 59080 event pairs, 1023 based on Foata normal form. 6/7889 useless extension candidates. Maximal degree in co-relation 77400. Up to 6732 conditions per place. [2024-06-28 00:05:47,077 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 427 selfloop transitions, 56 changer transitions 0/490 dead transitions. [2024-06-28 00:05:47,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 490 transitions, 10792 flow [2024-06-28 00:05:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-28 00:05:47,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-28 00:05:47,078 INFO L175 Difference]: Start difference. First operand has 405 places, 471 transitions, 9658 flow. Second operand 7 states and 142 transitions. [2024-06-28 00:05:47,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 490 transitions, 10792 flow [2024-06-28 00:05:49,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 490 transitions, 10618 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-28 00:05:49,719 INFO L231 Difference]: Finished difference. Result has 403 places, 473 transitions, 9687 flow [2024-06-28 00:05:49,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9484, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9687, PETRI_PLACES=403, PETRI_TRANSITIONS=473} [2024-06-28 00:05:49,719 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 362 predicate places. [2024-06-28 00:05:49,719 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 473 transitions, 9687 flow [2024-06-28 00:05:49,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:49,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:49,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:49,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 00:05:49,720 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)] === [2024-06-28 00:05:49,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:49,720 INFO L85 PathProgramCache]: Analyzing trace with hash -222875987, now seen corresponding path program 8 times [2024-06-28 00:05:49,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:49,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144217907] [2024-06-28 00:05:49,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:49,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:50,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:50,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144217907] [2024-06-28 00:05:50,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144217907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:50,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:50,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:50,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093019191] [2024-06-28 00:05:50,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:50,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:50,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:50,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:50,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:50,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:05:50,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 473 transitions, 9687 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:50,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:50,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:05:50,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:51,996 INFO L124 PetriNetUnfolderBase]: 4638/7916 cut-off events. [2024-06-28 00:05:51,997 INFO L125 PetriNetUnfolderBase]: For 840719/840719 co-relation queries the response was YES. [2024-06-28 00:05:52,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77542 conditions, 7916 events. 4638/7916 cut-off events. For 840719/840719 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 59208 event pairs, 998 based on Foata normal form. 2/7901 useless extension candidates. Maximal degree in co-relation 77363. Up to 6273 conditions per place. [2024-06-28 00:05:52,119 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 378 selfloop transitions, 107 changer transitions 0/492 dead transitions. [2024-06-28 00:05:52,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 492 transitions, 10995 flow [2024-06-28 00:05:52,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:05:52,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:05:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-28 00:05:52,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107142857142857 [2024-06-28 00:05:52,120 INFO L175 Difference]: Start difference. First operand has 403 places, 473 transitions, 9687 flow. Second operand 7 states and 143 transitions. [2024-06-28 00:05:52,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 492 transitions, 10995 flow [2024-06-28 00:05:54,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 492 transitions, 10822 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 00:05:54,682 INFO L231 Difference]: Finished difference. Result has 405 places, 475 transitions, 9818 flow [2024-06-28 00:05:54,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9514, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9818, PETRI_PLACES=405, PETRI_TRANSITIONS=475} [2024-06-28 00:05:54,682 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-28 00:05:54,683 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 475 transitions, 9818 flow [2024-06-28 00:05:54,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:54,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:54,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:54,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 00:05:54,683 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)] === [2024-06-28 00:05:54,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:54,683 INFO L85 PathProgramCache]: Analyzing trace with hash -233373511, now seen corresponding path program 8 times [2024-06-28 00:05:54,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:54,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898585091] [2024-06-28 00:05:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:54,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:05:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:05:55,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:05:55,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898585091] [2024-06-28 00:05:55,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898585091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:05:55,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:05:55,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:05:55,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300748834] [2024-06-28 00:05:55,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:05:55,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:05:55,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:05:55,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:05:55,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:05:55,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:05:55,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 475 transitions, 9818 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:55,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:05:55,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:05:55,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:05:56,961 INFO L124 PetriNetUnfolderBase]: 4671/7966 cut-off events. [2024-06-28 00:05:56,961 INFO L125 PetriNetUnfolderBase]: For 886342/886348 co-relation queries the response was YES. [2024-06-28 00:05:57,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78332 conditions, 7966 events. 4671/7966 cut-off events. For 886342/886348 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 59910 event pairs, 1542 based on Foata normal form. 15/7967 useless extension candidates. Maximal degree in co-relation 78152. Up to 7149 conditions per place. [2024-06-28 00:05:57,094 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 456 selfloop transitions, 31 changer transitions 0/494 dead transitions. [2024-06-28 00:05:57,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 494 transitions, 10983 flow [2024-06-28 00:05:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:05:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:05:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 00:05:57,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-28 00:05:57,097 INFO L175 Difference]: Start difference. First operand has 405 places, 475 transitions, 9818 flow. Second operand 8 states and 156 transitions. [2024-06-28 00:05:57,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 494 transitions, 10983 flow [2024-06-28 00:05:59,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 494 transitions, 10646 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-28 00:05:59,744 INFO L231 Difference]: Finished difference. Result has 407 places, 476 transitions, 9588 flow [2024-06-28 00:05:59,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9484, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9588, PETRI_PLACES=407, PETRI_TRANSITIONS=476} [2024-06-28 00:05:59,745 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-28 00:05:59,745 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 476 transitions, 9588 flow [2024-06-28 00:05:59,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:05:59,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:05:59,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:05:59,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 00:05:59,745 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)] === [2024-06-28 00:05:59,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:05:59,746 INFO L85 PathProgramCache]: Analyzing trace with hash -233373728, now seen corresponding path program 17 times [2024-06-28 00:05:59,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:05:59,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316349296] [2024-06-28 00:05:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:05:59,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:05:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:00,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:00,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316349296] [2024-06-28 00:06:00,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316349296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:00,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:00,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:00,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923333558] [2024-06-28 00:06:00,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:00,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:00,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:00,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:00,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:00,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:06:00,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 476 transitions, 9588 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:00,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:00,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:06:00,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:02,145 INFO L124 PetriNetUnfolderBase]: 4794/8169 cut-off events. [2024-06-28 00:06:02,145 INFO L125 PetriNetUnfolderBase]: For 927282/927282 co-relation queries the response was YES. [2024-06-28 00:06:02,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80979 conditions, 8169 events. 4794/8169 cut-off events. For 927282/927282 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 61374 event pairs, 1063 based on Foata normal form. 3/8155 useless extension candidates. Maximal degree in co-relation 80799. Up to 6442 conditions per place. [2024-06-28 00:06:02,282 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 390 selfloop transitions, 116 changer transitions 0/513 dead transitions. [2024-06-28 00:06:02,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 513 transitions, 11442 flow [2024-06-28 00:06:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:06:02,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:06:02,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-28 00:06:02,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2024-06-28 00:06:02,283 INFO L175 Difference]: Start difference. First operand has 407 places, 476 transitions, 9588 flow. Second operand 9 states and 182 transitions. [2024-06-28 00:06:02,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 513 transitions, 11442 flow [2024-06-28 00:06:05,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 513 transitions, 11354 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 00:06:05,025 INFO L231 Difference]: Finished difference. Result has 410 places, 482 transitions, 9906 flow [2024-06-28 00:06:05,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9500, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9906, PETRI_PLACES=410, PETRI_TRANSITIONS=482} [2024-06-28 00:06:05,025 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-28 00:06:05,025 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 482 transitions, 9906 flow [2024-06-28 00:06:05,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:05,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:05,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:05,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 00:06:05,026 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)] === [2024-06-28 00:06:05,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:05,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1429483335, now seen corresponding path program 9 times [2024-06-28 00:06:05,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:05,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601615583] [2024-06-28 00:06:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:05,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:05,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:05,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601615583] [2024-06-28 00:06:05,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601615583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:05,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:05,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:05,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953706160] [2024-06-28 00:06:05,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:05,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:05,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:05,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:05,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:05,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:06:05,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 482 transitions, 9906 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:05,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:05,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:06:05,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:07,464 INFO L124 PetriNetUnfolderBase]: 4827/8227 cut-off events. [2024-06-28 00:06:07,464 INFO L125 PetriNetUnfolderBase]: For 981014/981020 co-relation queries the response was YES. [2024-06-28 00:06:07,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82671 conditions, 8227 events. 4827/8227 cut-off events. For 981014/981020 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 62235 event pairs, 1589 based on Foata normal form. 15/8228 useless extension candidates. Maximal degree in co-relation 82490. Up to 7397 conditions per place. [2024-06-28 00:06:07,587 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 470 selfloop transitions, 23 changer transitions 0/500 dead transitions. [2024-06-28 00:06:07,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 500 transitions, 11076 flow [2024-06-28 00:06:07,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:06:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:06:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 00:06:07,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-28 00:06:07,588 INFO L175 Difference]: Start difference. First operand has 410 places, 482 transitions, 9906 flow. Second operand 8 states and 155 transitions. [2024-06-28 00:06:07,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 500 transitions, 11076 flow [2024-06-28 00:06:10,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 500 transitions, 10819 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-28 00:06:10,129 INFO L231 Difference]: Finished difference. Result has 413 places, 483 transitions, 9739 flow [2024-06-28 00:06:10,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9649, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9739, PETRI_PLACES=413, PETRI_TRANSITIONS=483} [2024-06-28 00:06:10,129 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-28 00:06:10,129 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 483 transitions, 9739 flow [2024-06-28 00:06:10,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:10,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:10,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:10,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 00:06:10,130 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)] === [2024-06-28 00:06:10,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:10,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1433212077, now seen corresponding path program 12 times [2024-06-28 00:06:10,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:10,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800674960] [2024-06-28 00:06:10,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:10,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:10,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:10,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800674960] [2024-06-28 00:06:10,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800674960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:10,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:10,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:10,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701735827] [2024-06-28 00:06:10,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:10,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:10,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:10,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:10,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:10,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:06:10,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 483 transitions, 9739 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:10,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:10,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:06:10,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:12,515 INFO L124 PetriNetUnfolderBase]: 4846/8261 cut-off events. [2024-06-28 00:06:12,515 INFO L125 PetriNetUnfolderBase]: For 973403/973403 co-relation queries the response was YES. [2024-06-28 00:06:12,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82502 conditions, 8261 events. 4846/8261 cut-off events. For 973403/973403 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 62385 event pairs, 1043 based on Foata normal form. 6/8250 useless extension candidates. Maximal degree in co-relation 82318. Up to 7049 conditions per place. [2024-06-28 00:06:12,658 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 437 selfloop transitions, 64 changer transitions 0/507 dead transitions. [2024-06-28 00:06:12,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 507 transitions, 10892 flow [2024-06-28 00:06:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:06:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:06:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 00:06:12,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-28 00:06:12,659 INFO L175 Difference]: Start difference. First operand has 413 places, 483 transitions, 9739 flow. Second operand 9 states and 158 transitions. [2024-06-28 00:06:12,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 507 transitions, 10892 flow [2024-06-28 00:06:15,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 507 transitions, 10808 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 00:06:15,095 INFO L231 Difference]: Finished difference. Result has 417 places, 486 transitions, 9891 flow [2024-06-28 00:06:15,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9655, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9891, PETRI_PLACES=417, PETRI_TRANSITIONS=486} [2024-06-28 00:06:15,096 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-28 00:06:15,096 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 486 transitions, 9891 flow [2024-06-28 00:06:15,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:15,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:15,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:15,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 00:06:15,097 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)] === [2024-06-28 00:06:15,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:15,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1419129961, now seen corresponding path program 9 times [2024-06-28 00:06:15,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:15,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637725407] [2024-06-28 00:06:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:15,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:15,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:15,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637725407] [2024-06-28 00:06:15,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637725407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:15,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:15,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:15,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899211402] [2024-06-28 00:06:15,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:15,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:15,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:15,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:15,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:15,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:06:15,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 486 transitions, 9891 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:15,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:15,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:06:15,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:17,433 INFO L124 PetriNetUnfolderBase]: 4841/8252 cut-off events. [2024-06-28 00:06:17,433 INFO L125 PetriNetUnfolderBase]: For 971365/971365 co-relation queries the response was YES. [2024-06-28 00:06:17,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82758 conditions, 8252 events. 4841/8252 cut-off events. For 971365/971365 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 62155 event pairs, 1116 based on Foata normal form. 2/8237 useless extension candidates. Maximal degree in co-relation 82572. Up to 7064 conditions per place. [2024-06-28 00:06:17,579 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 439 selfloop transitions, 57 changer transitions 0/503 dead transitions. [2024-06-28 00:06:17,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 503 transitions, 10995 flow [2024-06-28 00:06:17,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:06:17,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:06:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-28 00:06:17,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035714285714286 [2024-06-28 00:06:17,580 INFO L175 Difference]: Start difference. First operand has 417 places, 486 transitions, 9891 flow. Second operand 7 states and 141 transitions. [2024-06-28 00:06:17,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 503 transitions, 10995 flow [2024-06-28 00:06:20,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 503 transitions, 10804 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 00:06:20,402 INFO L231 Difference]: Finished difference. Result has 418 places, 488 transitions, 9897 flow [2024-06-28 00:06:20,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9700, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9897, PETRI_PLACES=418, PETRI_TRANSITIONS=488} [2024-06-28 00:06:20,402 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 377 predicate places. [2024-06-28 00:06:20,402 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 488 transitions, 9897 flow [2024-06-28 00:06:20,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:20,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:20,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:20,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 00:06:20,403 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)] === [2024-06-28 00:06:20,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1422705098, now seen corresponding path program 18 times [2024-06-28 00:06:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:20,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121160605] [2024-06-28 00:06:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:20,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:20,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:20,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121160605] [2024-06-28 00:06:20,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121160605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:20,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:20,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:20,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419387115] [2024-06-28 00:06:20,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:20,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:20,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:20,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:20,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:20,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:06:20,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 488 transitions, 9897 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:20,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:20,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:06:20,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:22,679 INFO L124 PetriNetUnfolderBase]: 4886/8329 cut-off events. [2024-06-28 00:06:22,679 INFO L125 PetriNetUnfolderBase]: For 1034896/1034896 co-relation queries the response was YES. [2024-06-28 00:06:22,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83602 conditions, 8329 events. 4886/8329 cut-off events. For 1034896/1034896 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 62907 event pairs, 1119 based on Foata normal form. 13/8325 useless extension candidates. Maximal degree in co-relation 83416. Up to 7030 conditions per place. [2024-06-28 00:06:22,832 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 446 selfloop transitions, 57 changer transitions 0/510 dead transitions. [2024-06-28 00:06:22,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 510 transitions, 11117 flow [2024-06-28 00:06:22,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:06:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:06:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 00:06:22,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:06:22,833 INFO L175 Difference]: Start difference. First operand has 418 places, 488 transitions, 9897 flow. Second operand 8 states and 160 transitions. [2024-06-28 00:06:22,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 510 transitions, 11117 flow [2024-06-28 00:06:25,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 510 transitions, 10932 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 00:06:25,842 INFO L231 Difference]: Finished difference. Result has 421 places, 489 transitions, 9862 flow [2024-06-28 00:06:25,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9712, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9862, PETRI_PLACES=421, PETRI_TRANSITIONS=489} [2024-06-28 00:06:25,842 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 380 predicate places. [2024-06-28 00:06:25,842 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 489 transitions, 9862 flow [2024-06-28 00:06:25,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:25,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:25,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:25,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 00:06:25,843 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)] === [2024-06-28 00:06:25,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:25,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1429625625, now seen corresponding path program 10 times [2024-06-28 00:06:25,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:25,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109001673] [2024-06-28 00:06:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:25,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:26,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:26,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109001673] [2024-06-28 00:06:26,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109001673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:26,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:26,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:26,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812267464] [2024-06-28 00:06:26,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:26,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:26,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:26,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:26,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:26,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:06:26,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 489 transitions, 9862 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:26,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:26,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:06:26,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:28,154 INFO L124 PetriNetUnfolderBase]: 4881/8322 cut-off events. [2024-06-28 00:06:28,154 INFO L125 PetriNetUnfolderBase]: For 1000384/1000384 co-relation queries the response was YES. [2024-06-28 00:06:28,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83466 conditions, 8322 events. 4881/8322 cut-off events. For 1000384/1000384 co-relation queries the response was YES. Maximal size of possible extension queue 679. Compared 62828 event pairs, 1116 based on Foata normal form. 2/8307 useless extension candidates. Maximal degree in co-relation 83279. Up to 7126 conditions per place. [2024-06-28 00:06:28,275 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 440 selfloop transitions, 59 changer transitions 0/506 dead transitions. [2024-06-28 00:06:28,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 506 transitions, 10948 flow [2024-06-28 00:06:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:06:28,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:06:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-28 00:06:28,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:06:28,276 INFO L175 Difference]: Start difference. First operand has 421 places, 489 transitions, 9862 flow. Second operand 7 states and 140 transitions. [2024-06-28 00:06:28,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 506 transitions, 10948 flow [2024-06-28 00:06:30,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 506 transitions, 10816 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 00:06:30,686 INFO L231 Difference]: Finished difference. Result has 422 places, 491 transitions, 9907 flow [2024-06-28 00:06:30,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9732, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9907, PETRI_PLACES=422, PETRI_TRANSITIONS=491} [2024-06-28 00:06:30,686 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-28 00:06:30,686 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 491 transitions, 9907 flow [2024-06-28 00:06:30,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:30,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:30,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:30,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 00:06:30,687 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)] === [2024-06-28 00:06:30,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:30,687 INFO L85 PathProgramCache]: Analyzing trace with hash -222876204, now seen corresponding path program 19 times [2024-06-28 00:06:30,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:30,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730247486] [2024-06-28 00:06:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:30,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:31,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:31,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730247486] [2024-06-28 00:06:31,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730247486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:31,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:31,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:31,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936690312] [2024-06-28 00:06:31,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:31,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:31,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:31,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:06:31,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 491 transitions, 9907 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:31,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:31,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:06:31,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:33,071 INFO L124 PetriNetUnfolderBase]: 4905/8377 cut-off events. [2024-06-28 00:06:33,071 INFO L125 PetriNetUnfolderBase]: For 1057454/1057454 co-relation queries the response was YES. [2024-06-28 00:06:33,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83260 conditions, 8377 events. 4905/8377 cut-off events. For 1057454/1057454 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 63602 event pairs, 1084 based on Foata normal form. 19/8379 useless extension candidates. Maximal degree in co-relation 83072. Up to 6716 conditions per place. [2024-06-28 00:06:33,224 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 401 selfloop transitions, 110 changer transitions 0/518 dead transitions. [2024-06-28 00:06:33,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 518 transitions, 11427 flow [2024-06-28 00:06:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:06:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:06:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-28 00:06:33,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-28 00:06:33,225 INFO L175 Difference]: Start difference. First operand has 422 places, 491 transitions, 9907 flow. Second operand 8 states and 162 transitions. [2024-06-28 00:06:33,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 518 transitions, 11427 flow [2024-06-28 00:06:36,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 518 transitions, 11257 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 00:06:36,168 INFO L231 Difference]: Finished difference. Result has 426 places, 492 transitions, 9987 flow [2024-06-28 00:06:36,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9737, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9987, PETRI_PLACES=426, PETRI_TRANSITIONS=492} [2024-06-28 00:06:36,168 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-28 00:06:36,168 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 492 transitions, 9987 flow [2024-06-28 00:06:36,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:36,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:36,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:36,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 00:06:36,169 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)] === [2024-06-28 00:06:36,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash -225754951, now seen corresponding path program 10 times [2024-06-28 00:06:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:36,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114662514] [2024-06-28 00:06:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:36,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:36,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114662514] [2024-06-28 00:06:36,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114662514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:36,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:36,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:36,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248772497] [2024-06-28 00:06:36,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:36,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:36,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:36,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:36,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:36,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:06:36,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 492 transitions, 9987 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:36,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:36,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:06:36,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:38,651 INFO L124 PetriNetUnfolderBase]: 4938/8445 cut-off events. [2024-06-28 00:06:38,651 INFO L125 PetriNetUnfolderBase]: For 1041918/1041924 co-relation queries the response was YES. [2024-06-28 00:06:38,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84317 conditions, 8445 events. 4938/8445 cut-off events. For 1041918/1041924 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 64544 event pairs, 1564 based on Foata normal form. 15/8446 useless extension candidates. Maximal degree in co-relation 84129. Up to 7260 conditions per place. [2024-06-28 00:06:38,784 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 463 selfloop transitions, 45 changer transitions 0/515 dead transitions. [2024-06-28 00:06:38,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 515 transitions, 11445 flow [2024-06-28 00:06:38,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:06:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:06:38,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 00:06:38,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503125 [2024-06-28 00:06:38,785 INFO L175 Difference]: Start difference. First operand has 426 places, 492 transitions, 9987 flow. Second operand 8 states and 161 transitions. [2024-06-28 00:06:38,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 515 transitions, 11445 flow [2024-06-28 00:06:41,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 515 transitions, 11217 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 00:06:41,667 INFO L231 Difference]: Finished difference. Result has 428 places, 493 transitions, 9893 flow [2024-06-28 00:06:41,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9759, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9893, PETRI_PLACES=428, PETRI_TRANSITIONS=493} [2024-06-28 00:06:41,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-28 00:06:41,668 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 493 transitions, 9893 flow [2024-06-28 00:06:41,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:41,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:41,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:41,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 00:06:41,668 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)] === [2024-06-28 00:06:41,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:41,668 INFO L85 PathProgramCache]: Analyzing trace with hash -215518757, now seen corresponding path program 11 times [2024-06-28 00:06:41,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:41,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544720532] [2024-06-28 00:06:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:41,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:42,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:42,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544720532] [2024-06-28 00:06:42,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544720532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:42,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:42,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:42,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118610739] [2024-06-28 00:06:42,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:42,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:42,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:42,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:42,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:42,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:06:42,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 493 transitions, 9893 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:42,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:42,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:06:42,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:44,111 INFO L124 PetriNetUnfolderBase]: 4917/8407 cut-off events. [2024-06-28 00:06:44,111 INFO L125 PetriNetUnfolderBase]: For 1019946/1019952 co-relation queries the response was YES. [2024-06-28 00:06:44,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82944 conditions, 8407 events. 4917/8407 cut-off events. For 1019946/1019952 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 64120 event pairs, 1581 based on Foata normal form. 15/8408 useless extension candidates. Maximal degree in co-relation 82755. Up to 7251 conditions per place. [2024-06-28 00:06:44,258 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 465 selfloop transitions, 45 changer transitions 0/517 dead transitions. [2024-06-28 00:06:44,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 517 transitions, 11141 flow [2024-06-28 00:06:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:06:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:06:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-28 00:06:44,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-06-28 00:06:44,259 INFO L175 Difference]: Start difference. First operand has 428 places, 493 transitions, 9893 flow. Second operand 9 states and 179 transitions. [2024-06-28 00:06:44,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 517 transitions, 11141 flow [2024-06-28 00:06:47,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 517 transitions, 10965 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 00:06:47,196 INFO L231 Difference]: Finished difference. Result has 431 places, 493 transitions, 9813 flow [2024-06-28 00:06:47,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9717, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9813, PETRI_PLACES=431, PETRI_TRANSITIONS=493} [2024-06-28 00:06:47,197 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-28 00:06:47,197 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 493 transitions, 9813 flow [2024-06-28 00:06:47,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:47,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:47,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:47,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 00:06:47,197 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)] === [2024-06-28 00:06:47,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:47,198 INFO L85 PathProgramCache]: Analyzing trace with hash -215518974, now seen corresponding path program 20 times [2024-06-28 00:06:47,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:47,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443874249] [2024-06-28 00:06:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:47,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:47,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:47,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443874249] [2024-06-28 00:06:47,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443874249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:47,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:47,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:47,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440527552] [2024-06-28 00:06:47,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:47,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:47,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:47,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:47,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:47,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:06:47,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 493 transitions, 9813 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:47,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:47,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:06:47,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:49,809 INFO L124 PetriNetUnfolderBase]: 4968/8466 cut-off events. [2024-06-28 00:06:49,809 INFO L125 PetriNetUnfolderBase]: For 1032729/1032729 co-relation queries the response was YES. [2024-06-28 00:06:49,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84113 conditions, 8466 events. 4968/8466 cut-off events. For 1032729/1032729 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 64122 event pairs, 1055 based on Foata normal form. 3/8452 useless extension candidates. Maximal degree in co-relation 83923. Up to 5470 conditions per place. [2024-06-28 00:06:49,939 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 378 selfloop transitions, 149 changer transitions 0/534 dead transitions. [2024-06-28 00:06:49,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 534 transitions, 12065 flow [2024-06-28 00:06:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:06:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:06:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-28 00:06:49,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-28 00:06:49,940 INFO L175 Difference]: Start difference. First operand has 431 places, 493 transitions, 9813 flow. Second operand 10 states and 204 transitions. [2024-06-28 00:06:49,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 534 transitions, 12065 flow [2024-06-28 00:06:52,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 534 transitions, 11921 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-28 00:06:52,831 INFO L231 Difference]: Finished difference. Result has 432 places, 500 transitions, 10203 flow [2024-06-28 00:06:52,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9675, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10203, PETRI_PLACES=432, PETRI_TRANSITIONS=500} [2024-06-28 00:06:52,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-28 00:06:52,832 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 500 transitions, 10203 flow [2024-06-28 00:06:52,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 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) [2024-06-28 00:06:52,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:52,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:52,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 00:06:52,832 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)] === [2024-06-28 00:06:52,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:52,832 INFO L85 PathProgramCache]: Analyzing trace with hash 799266113, now seen corresponding path program 1 times [2024-06-28 00:06:52,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:52,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72883266] [2024-06-28 00:06:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:52,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:53,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:53,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72883266] [2024-06-28 00:06:53,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72883266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:53,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:53,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:06:53,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155010475] [2024-06-28 00:06:53,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:53,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:06:53,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:53,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:06:53,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:06:53,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:06:53,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 500 transitions, 10203 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 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) [2024-06-28 00:06:53,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:53,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:06:53,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:06:55,546 INFO L124 PetriNetUnfolderBase]: 5189/8839 cut-off events. [2024-06-28 00:06:55,546 INFO L125 PetriNetUnfolderBase]: For 1135414/1135430 co-relation queries the response was YES. [2024-06-28 00:06:55,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88938 conditions, 8839 events. 5189/8839 cut-off events. For 1135414/1135430 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 67459 event pairs, 847 based on Foata normal form. 32/8862 useless extension candidates. Maximal degree in co-relation 88747. Up to 5834 conditions per place. [2024-06-28 00:06:55,701 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 368 selfloop transitions, 191 changer transitions 0/565 dead transitions. [2024-06-28 00:06:55,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 565 transitions, 12483 flow [2024-06-28 00:06:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:06:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:06:55,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-28 00:06:55,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-28 00:06:55,702 INFO L175 Difference]: Start difference. First operand has 432 places, 500 transitions, 10203 flow. Second operand 10 states and 204 transitions. [2024-06-28 00:06:55,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 565 transitions, 12483 flow [2024-06-28 00:06:59,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 565 transitions, 12180 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-28 00:06:59,257 INFO L231 Difference]: Finished difference. Result has 441 places, 520 transitions, 11073 flow [2024-06-28 00:06:59,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9920, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11073, PETRI_PLACES=441, PETRI_TRANSITIONS=520} [2024-06-28 00:06:59,258 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-28 00:06:59,258 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 520 transitions, 11073 flow [2024-06-28 00:06:59,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 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) [2024-06-28 00:06:59,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:06:59,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:06:59,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 00:06:59,258 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)] === [2024-06-28 00:06:59,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:06:59,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1006069283, now seen corresponding path program 2 times [2024-06-28 00:06:59,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:06:59,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697664239] [2024-06-28 00:06:59,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:06:59,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:06:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:06:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:06:59,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:06:59,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697664239] [2024-06-28 00:06:59,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697664239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:06:59,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:06:59,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:06:59,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879884945] [2024-06-28 00:06:59,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:06:59,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:06:59,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:06:59,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:06:59,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:06:59,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:06:59,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 520 transitions, 11073 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:06:59,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:06:59,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:06:59,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:01,955 INFO L124 PetriNetUnfolderBase]: 5265/9011 cut-off events. [2024-06-28 00:07:01,955 INFO L125 PetriNetUnfolderBase]: For 1190074/1190080 co-relation queries the response was YES. [2024-06-28 00:07:02,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90781 conditions, 9011 events. 5265/9011 cut-off events. For 1190074/1190080 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 69775 event pairs, 1307 based on Foata normal form. 36/9037 useless extension candidates. Maximal degree in co-relation 90584. Up to 7351 conditions per place. [2024-06-28 00:07:02,112 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 468 selfloop transitions, 78 changer transitions 0/553 dead transitions. [2024-06-28 00:07:02,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 553 transitions, 12566 flow [2024-06-28 00:07:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:07:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:07:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-28 00:07:02,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2024-06-28 00:07:02,113 INFO L175 Difference]: Start difference. First operand has 441 places, 520 transitions, 11073 flow. Second operand 9 states and 182 transitions. [2024-06-28 00:07:02,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 553 transitions, 12566 flow [2024-06-28 00:07:06,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 553 transitions, 12393 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 00:07:06,150 INFO L231 Difference]: Finished difference. Result has 443 places, 523 transitions, 11252 flow [2024-06-28 00:07:06,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10901, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11252, PETRI_PLACES=443, PETRI_TRANSITIONS=523} [2024-06-28 00:07:06,151 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-28 00:07:06,151 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 523 transitions, 11252 flow [2024-06-28 00:07:06,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:06,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:06,151 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] [2024-06-28 00:07:06,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 00:07:06,151 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)] === [2024-06-28 00:07:06,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:06,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1881408351, now seen corresponding path program 3 times [2024-06-28 00:07:06,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:06,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198486058] [2024-06-28 00:07:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:06,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:06,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:06,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198486058] [2024-06-28 00:07:06,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198486058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:06,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:06,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:06,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057109240] [2024-06-28 00:07:06,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:06,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:06,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:06,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:06,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:07:06,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 523 transitions, 11252 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:06,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:06,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:07:06,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:09,115 INFO L124 PetriNetUnfolderBase]: 5316/9098 cut-off events. [2024-06-28 00:07:09,115 INFO L125 PetriNetUnfolderBase]: For 1034864/1034870 co-relation queries the response was YES. [2024-06-28 00:07:09,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90177 conditions, 9098 events. 5316/9098 cut-off events. For 1034864/1034870 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 70610 event pairs, 1140 based on Foata normal form. 16/9087 useless extension candidates. Maximal degree in co-relation 89984. Up to 6635 conditions per place. [2024-06-28 00:07:09,268 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 434 selfloop transitions, 131 changer transitions 0/572 dead transitions. [2024-06-28 00:07:09,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 572 transitions, 13175 flow [2024-06-28 00:07:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:07:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:07:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-28 00:07:09,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-28 00:07:09,269 INFO L175 Difference]: Start difference. First operand has 443 places, 523 transitions, 11252 flow. Second operand 10 states and 210 transitions. [2024-06-28 00:07:09,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 572 transitions, 13175 flow [2024-06-28 00:07:12,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 572 transitions, 12921 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-28 00:07:12,689 INFO L231 Difference]: Finished difference. Result has 449 places, 529 transitions, 11541 flow [2024-06-28 00:07:12,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11045, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11541, PETRI_PLACES=449, PETRI_TRANSITIONS=529} [2024-06-28 00:07:12,690 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 408 predicate places. [2024-06-28 00:07:12,690 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 529 transitions, 11541 flow [2024-06-28 00:07:12,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:12,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:12,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:12,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 00:07:12,690 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)] === [2024-06-28 00:07:12,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:12,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1762714669, now seen corresponding path program 1 times [2024-06-28 00:07:12,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:12,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8073054] [2024-06-28 00:07:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:12,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:12,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:12,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8073054] [2024-06-28 00:07:12,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8073054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:12,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:12,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:07:12,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813981548] [2024-06-28 00:07:12,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:12,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:07:12,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:12,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:07:12,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:07:12,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:07:12,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 529 transitions, 11541 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:12,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:12,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:07:12,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:15,622 INFO L124 PetriNetUnfolderBase]: 5782/10164 cut-off events. [2024-06-28 00:07:15,622 INFO L125 PetriNetUnfolderBase]: For 1348423/1348661 co-relation queries the response was YES. [2024-06-28 00:07:15,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98456 conditions, 10164 events. 5782/10164 cut-off events. For 1348423/1348661 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 83327 event pairs, 892 based on Foata normal form. 250/10398 useless extension candidates. Maximal degree in co-relation 98261. Up to 5441 conditions per place. [2024-06-28 00:07:15,776 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 398 selfloop transitions, 109 changer transitions 29/598 dead transitions. [2024-06-28 00:07:15,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 598 transitions, 13569 flow [2024-06-28 00:07:15,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:07:15,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:07:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 00:07:15,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-28 00:07:15,777 INFO L175 Difference]: Start difference. First operand has 449 places, 529 transitions, 11541 flow. Second operand 9 states and 172 transitions. [2024-06-28 00:07:15,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 598 transitions, 13569 flow [2024-06-28 00:07:19,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 598 transitions, 13252 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 00:07:19,714 INFO L231 Difference]: Finished difference. Result has 453 places, 532 transitions, 11520 flow [2024-06-28 00:07:19,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11224, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11520, PETRI_PLACES=453, PETRI_TRANSITIONS=532} [2024-06-28 00:07:19,715 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 412 predicate places. [2024-06-28 00:07:19,715 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 532 transitions, 11520 flow [2024-06-28 00:07:19,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:19,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:19,715 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] [2024-06-28 00:07:19,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 00:07:19,715 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)] === [2024-06-28 00:07:19,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:19,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1589741029, now seen corresponding path program 2 times [2024-06-28 00:07:19,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:19,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473979020] [2024-06-28 00:07:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:19,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:20,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:20,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473979020] [2024-06-28 00:07:20,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473979020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:20,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:20,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:20,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204648782] [2024-06-28 00:07:20,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:20,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:20,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:20,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:20,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:20,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:07:20,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 532 transitions, 11520 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:20,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:20,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:07:20,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:22,848 INFO L124 PetriNetUnfolderBase]: 5799/10097 cut-off events. [2024-06-28 00:07:22,848 INFO L125 PetriNetUnfolderBase]: For 1213133/1213139 co-relation queries the response was YES. [2024-06-28 00:07:22,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97839 conditions, 10097 events. 5799/10097 cut-off events. For 1213133/1213139 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 81826 event pairs, 1696 based on Foata normal form. 33/10100 useless extension candidates. Maximal degree in co-relation 97642. Up to 8568 conditions per place. [2024-06-28 00:07:23,037 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 505 selfloop transitions, 37 changer transitions 18/567 dead transitions. [2024-06-28 00:07:23,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 567 transitions, 12943 flow [2024-06-28 00:07:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:07:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:07:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-28 00:07:23,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-28 00:07:23,038 INFO L175 Difference]: Start difference. First operand has 453 places, 532 transitions, 11520 flow. Second operand 8 states and 170 transitions. [2024-06-28 00:07:23,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 567 transitions, 12943 flow [2024-06-28 00:07:26,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 567 transitions, 12358 flow, removed 46 selfloop flow, removed 10 redundant places. [2024-06-28 00:07:26,863 INFO L231 Difference]: Finished difference. Result has 451 places, 529 transitions, 10969 flow [2024-06-28 00:07:26,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10941, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10969, PETRI_PLACES=451, PETRI_TRANSITIONS=529} [2024-06-28 00:07:26,864 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 410 predicate places. [2024-06-28 00:07:26,864 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 529 transitions, 10969 flow [2024-06-28 00:07:26,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:26,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:26,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:26,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 00:07:26,864 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)] === [2024-06-28 00:07:26,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:26,865 INFO L85 PathProgramCache]: Analyzing trace with hash 585567191, now seen corresponding path program 3 times [2024-06-28 00:07:26,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:26,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535867972] [2024-06-28 00:07:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:26,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:27,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:27,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535867972] [2024-06-28 00:07:27,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535867972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:27,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:27,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:27,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450201363] [2024-06-28 00:07:27,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:27,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:27,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:27,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:27,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:27,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:07:27,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 529 transitions, 10969 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:27,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:27,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:07:27,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:29,821 INFO L124 PetriNetUnfolderBase]: 5814/10114 cut-off events. [2024-06-28 00:07:29,821 INFO L125 PetriNetUnfolderBase]: For 1320496/1320502 co-relation queries the response was YES. [2024-06-28 00:07:29,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98229 conditions, 10114 events. 5814/10114 cut-off events. For 1320496/1320502 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 81656 event pairs, 1530 based on Foata normal form. 33/10117 useless extension candidates. Maximal degree in co-relation 98037. Up to 7843 conditions per place. [2024-06-28 00:07:30,010 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 461 selfloop transitions, 64 changer transitions 46/578 dead transitions. [2024-06-28 00:07:30,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 578 transitions, 12862 flow [2024-06-28 00:07:30,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:07:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:07:30,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-28 00:07:30,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181818181818182 [2024-06-28 00:07:30,013 INFO L175 Difference]: Start difference. First operand has 451 places, 529 transitions, 10969 flow. Second operand 11 states and 228 transitions. [2024-06-28 00:07:30,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 578 transitions, 12862 flow [2024-06-28 00:07:33,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 578 transitions, 12748 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 00:07:33,978 INFO L231 Difference]: Finished difference. Result has 452 places, 504 transitions, 10197 flow [2024-06-28 00:07:33,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10859, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10197, PETRI_PLACES=452, PETRI_TRANSITIONS=504} [2024-06-28 00:07:33,979 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-28 00:07:33,979 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 504 transitions, 10197 flow [2024-06-28 00:07:33,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:33,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:33,979 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] [2024-06-28 00:07:33,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 00:07:33,979 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)] === [2024-06-28 00:07:33,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:33,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2059018723, now seen corresponding path program 4 times [2024-06-28 00:07:33,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:33,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906776535] [2024-06-28 00:07:33,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:33,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:34,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:34,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906776535] [2024-06-28 00:07:34,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906776535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:34,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:34,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:34,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734331950] [2024-06-28 00:07:34,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:34,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:34,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:34,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:34,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:34,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:07:34,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 504 transitions, 10197 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:34,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:34,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:07:34,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:36,742 INFO L124 PetriNetUnfolderBase]: 5601/9733 cut-off events. [2024-06-28 00:07:36,742 INFO L125 PetriNetUnfolderBase]: For 1279841/1279847 co-relation queries the response was YES. [2024-06-28 00:07:36,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94290 conditions, 9733 events. 5601/9733 cut-off events. For 1279841/1279847 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 78309 event pairs, 1471 based on Foata normal form. 33/9734 useless extension candidates. Maximal degree in co-relation 94117. Up to 8199 conditions per place. [2024-06-28 00:07:36,912 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 448 selfloop transitions, 52 changer transitions 28/535 dead transitions. [2024-06-28 00:07:36,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 535 transitions, 11571 flow [2024-06-28 00:07:36,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:07:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:07:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-28 00:07:36,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-06-28 00:07:36,913 INFO L175 Difference]: Start difference. First operand has 452 places, 504 transitions, 10197 flow. Second operand 10 states and 196 transitions. [2024-06-28 00:07:36,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 535 transitions, 11571 flow [2024-06-28 00:07:40,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 535 transitions, 11283 flow, removed 38 selfloop flow, removed 16 redundant places. [2024-06-28 00:07:40,666 INFO L231 Difference]: Finished difference. Result has 436 places, 490 transitions, 9552 flow [2024-06-28 00:07:40,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9909, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9552, PETRI_PLACES=436, PETRI_TRANSITIONS=490} [2024-06-28 00:07:40,666 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-28 00:07:40,667 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 490 transitions, 9552 flow [2024-06-28 00:07:40,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:40,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:40,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:40,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 00:07:40,667 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)] === [2024-06-28 00:07:40,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:40,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1448468789, now seen corresponding path program 5 times [2024-06-28 00:07:40,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:40,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008633969] [2024-06-28 00:07:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:40,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:41,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:41,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008633969] [2024-06-28 00:07:41,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008633969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:41,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:41,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:41,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300455568] [2024-06-28 00:07:41,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:41,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:41,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:41,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:41,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:41,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:07:41,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 490 transitions, 9552 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:41,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:41,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:07:41,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:43,536 INFO L124 PetriNetUnfolderBase]: 5597/9756 cut-off events. [2024-06-28 00:07:43,536 INFO L125 PetriNetUnfolderBase]: For 1345216/1345222 co-relation queries the response was YES. [2024-06-28 00:07:43,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93060 conditions, 9756 events. 5597/9756 cut-off events. For 1345216/1345222 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 78512 event pairs, 1502 based on Foata normal form. 60/9807 useless extension candidates. Maximal degree in co-relation 92891. Up to 7742 conditions per place. [2024-06-28 00:07:43,699 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 447 selfloop transitions, 54 changer transitions 20/528 dead transitions. [2024-06-28 00:07:43,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 528 transitions, 10927 flow [2024-06-28 00:07:43,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:07:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:07:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-28 00:07:43,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-28 00:07:43,700 INFO L175 Difference]: Start difference. First operand has 436 places, 490 transitions, 9552 flow. Second operand 8 states and 170 transitions. [2024-06-28 00:07:43,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 528 transitions, 10927 flow [2024-06-28 00:07:47,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 528 transitions, 10733 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-28 00:07:47,230 INFO L231 Difference]: Finished difference. Result has 428 places, 485 transitions, 9402 flow [2024-06-28 00:07:47,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9360, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9402, PETRI_PLACES=428, PETRI_TRANSITIONS=485} [2024-06-28 00:07:47,230 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-28 00:07:47,230 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 485 transitions, 9402 flow [2024-06-28 00:07:47,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:47,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:47,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:47,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 00:07:47,231 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)] === [2024-06-28 00:07:47,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:47,231 INFO L85 PathProgramCache]: Analyzing trace with hash -209186425, now seen corresponding path program 6 times [2024-06-28 00:07:47,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:47,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708642704] [2024-06-28 00:07:47,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:47,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:47,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:47,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708642704] [2024-06-28 00:07:47,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708642704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:47,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:47,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:47,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193490279] [2024-06-28 00:07:47,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:47,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:47,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:47,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:47,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:47,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:07:47,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 485 transitions, 9402 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:47,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:47,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:07:47,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:49,852 INFO L124 PetriNetUnfolderBase]: 5420/9420 cut-off events. [2024-06-28 00:07:49,852 INFO L125 PetriNetUnfolderBase]: For 1280694/1280700 co-relation queries the response was YES. [2024-06-28 00:07:49,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91927 conditions, 9420 events. 5420/9420 cut-off events. For 1280694/1280700 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 74853 event pairs, 1381 based on Foata normal form. 33/9434 useless extension candidates. Maximal degree in co-relation 91760. Up to 6663 conditions per place. [2024-06-28 00:07:50,017 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 382 selfloop transitions, 104 changer transitions 39/532 dead transitions. [2024-06-28 00:07:50,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 532 transitions, 11304 flow [2024-06-28 00:07:50,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:07:50,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:07:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-28 00:07:50,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-28 00:07:50,019 INFO L175 Difference]: Start difference. First operand has 428 places, 485 transitions, 9402 flow. Second operand 10 states and 215 transitions. [2024-06-28 00:07:50,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 532 transitions, 11304 flow [2024-06-28 00:07:53,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 532 transitions, 11168 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-28 00:07:53,216 INFO L231 Difference]: Finished difference. Result has 430 places, 467 transitions, 9101 flow [2024-06-28 00:07:53,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9286, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9101, PETRI_PLACES=430, PETRI_TRANSITIONS=467} [2024-06-28 00:07:53,217 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 389 predicate places. [2024-06-28 00:07:53,217 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 467 transitions, 9101 flow [2024-06-28 00:07:53,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:53,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:53,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:53,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 00:07:53,217 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)] === [2024-06-28 00:07:53,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:53,217 INFO L85 PathProgramCache]: Analyzing trace with hash -36816505, now seen corresponding path program 7 times [2024-06-28 00:07:53,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:53,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122373250] [2024-06-28 00:07:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:53,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:53,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:53,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122373250] [2024-06-28 00:07:53,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122373250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:53,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:53,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:53,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430232792] [2024-06-28 00:07:53,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:53,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:53,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:53,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:53,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:53,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:07:53,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 467 transitions, 9101 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:53,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:53,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:07:53,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:07:55,850 INFO L124 PetriNetUnfolderBase]: 5235/9044 cut-off events. [2024-06-28 00:07:55,850 INFO L125 PetriNetUnfolderBase]: For 1184996/1185002 co-relation queries the response was YES. [2024-06-28 00:07:55,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89270 conditions, 9044 events. 5235/9044 cut-off events. For 1184996/1185002 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 71183 event pairs, 1215 based on Foata normal form. 9/9044 useless extension candidates. Maximal degree in co-relation 89104. Up to 5759 conditions per place. [2024-06-28 00:07:56,010 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 401 selfloop transitions, 117 changer transitions 2/527 dead transitions. [2024-06-28 00:07:56,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 527 transitions, 11120 flow [2024-06-28 00:07:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:07:56,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:07:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-28 00:07:56,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-06-28 00:07:56,012 INFO L175 Difference]: Start difference. First operand has 430 places, 467 transitions, 9101 flow. Second operand 10 states and 211 transitions. [2024-06-28 00:07:56,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 527 transitions, 11120 flow [2024-06-28 00:07:59,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 527 transitions, 10793 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-06-28 00:07:59,202 INFO L231 Difference]: Finished difference. Result has 423 places, 484 transitions, 9386 flow [2024-06-28 00:07:59,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8782, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9386, PETRI_PLACES=423, PETRI_TRANSITIONS=484} [2024-06-28 00:07:59,202 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 382 predicate places. [2024-06-28 00:07:59,202 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 484 transitions, 9386 flow [2024-06-28 00:07:59,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:59,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:07:59,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:07:59,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 00:07:59,203 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)] === [2024-06-28 00:07:59,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:07:59,203 INFO L85 PathProgramCache]: Analyzing trace with hash -36488215, now seen corresponding path program 8 times [2024-06-28 00:07:59,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:07:59,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061235973] [2024-06-28 00:07:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:07:59,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:07:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:07:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:07:59,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:07:59,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061235973] [2024-06-28 00:07:59,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061235973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:07:59,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:07:59,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:07:59,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859711129] [2024-06-28 00:07:59,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:07:59,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:07:59,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:07:59,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:07:59,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:07:59,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:07:59,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 484 transitions, 9386 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:07:59,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:07:59,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:07:59,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:01,887 INFO L124 PetriNetUnfolderBase]: 5214/9008 cut-off events. [2024-06-28 00:08:01,887 INFO L125 PetriNetUnfolderBase]: For 1172598/1172604 co-relation queries the response was YES. [2024-06-28 00:08:01,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90201 conditions, 9008 events. 5214/9008 cut-off events. For 1172598/1172604 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 70751 event pairs, 1222 based on Foata normal form. 15/9014 useless extension candidates. Maximal degree in co-relation 90034. Up to 5759 conditions per place. [2024-06-28 00:08:02,017 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 408 selfloop transitions, 104 changer transitions 0/519 dead transitions. [2024-06-28 00:08:02,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 519 transitions, 10910 flow [2024-06-28 00:08:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:02,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-28 00:08:02,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540625 [2024-06-28 00:08:02,018 INFO L175 Difference]: Start difference. First operand has 423 places, 484 transitions, 9386 flow. Second operand 8 states and 173 transitions. [2024-06-28 00:08:02,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 519 transitions, 10910 flow [2024-06-28 00:08:04,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 519 transitions, 10393 flow, removed 100 selfloop flow, removed 6 redundant places. [2024-06-28 00:08:04,706 INFO L231 Difference]: Finished difference. Result has 425 places, 484 transitions, 9088 flow [2024-06-28 00:08:04,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8869, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9088, PETRI_PLACES=425, PETRI_TRANSITIONS=484} [2024-06-28 00:08:04,707 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-28 00:08:04,707 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 484 transitions, 9088 flow [2024-06-28 00:08:04,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:04,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:04,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:04,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 00:08:04,707 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)] === [2024-06-28 00:08:04,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:04,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1614702569, now seen corresponding path program 9 times [2024-06-28 00:08:04,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:04,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597917405] [2024-06-28 00:08:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:04,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:05,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:05,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597917405] [2024-06-28 00:08:05,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597917405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:05,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:05,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:05,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381888014] [2024-06-28 00:08:05,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:05,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:05,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:05,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:05,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:05,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:08:05,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 484 transitions, 9088 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:05,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:05,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:08:05,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:07,331 INFO L124 PetriNetUnfolderBase]: 5211/8992 cut-off events. [2024-06-28 00:08:07,331 INFO L125 PetriNetUnfolderBase]: For 1156323/1156329 co-relation queries the response was YES. [2024-06-28 00:08:07,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89289 conditions, 8992 events. 5211/8992 cut-off events. For 1156323/1156329 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 70524 event pairs, 1255 based on Foata normal form. 7/8989 useless extension candidates. Maximal degree in co-relation 89121. Up to 6642 conditions per place. [2024-06-28 00:08:07,491 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 409 selfloop transitions, 104 changer transitions 3/523 dead transitions. [2024-06-28 00:08:07,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 523 transitions, 10474 flow [2024-06-28 00:08:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:08:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:08:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-28 00:08:07,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-28 00:08:07,492 INFO L175 Difference]: Start difference. First operand has 425 places, 484 transitions, 9088 flow. Second operand 9 states and 186 transitions. [2024-06-28 00:08:07,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 523 transitions, 10474 flow [2024-06-28 00:08:11,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 523 transitions, 10264 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 00:08:11,110 INFO L231 Difference]: Finished difference. Result has 428 places, 491 transitions, 9295 flow [2024-06-28 00:08:11,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8880, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9295, PETRI_PLACES=428, PETRI_TRANSITIONS=491} [2024-06-28 00:08:11,111 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-28 00:08:11,111 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 491 transitions, 9295 flow [2024-06-28 00:08:11,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:11,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:11,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:11,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 00:08:11,112 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)] === [2024-06-28 00:08:11,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:11,112 INFO L85 PathProgramCache]: Analyzing trace with hash -42952645, now seen corresponding path program 10 times [2024-06-28 00:08:11,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:11,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937477171] [2024-06-28 00:08:11,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:11,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:11,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:11,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937477171] [2024-06-28 00:08:11,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937477171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:11,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:11,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:11,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80613252] [2024-06-28 00:08:11,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:11,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:11,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:11,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:11,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:11,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:08:11,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 491 transitions, 9295 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:11,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:11,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:08:11,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:13,858 INFO L124 PetriNetUnfolderBase]: 5430/9372 cut-off events. [2024-06-28 00:08:13,858 INFO L125 PetriNetUnfolderBase]: For 1351653/1351659 co-relation queries the response was YES. [2024-06-28 00:08:13,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97612 conditions, 9372 events. 5430/9372 cut-off events. For 1351653/1351659 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 73891 event pairs, 1344 based on Foata normal form. 7/9358 useless extension candidates. Maximal degree in co-relation 97442. Up to 3811 conditions per place. [2024-06-28 00:08:14,018 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 364 selfloop transitions, 166 changer transitions 2/539 dead transitions. [2024-06-28 00:08:14,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 539 transitions, 11427 flow [2024-06-28 00:08:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:08:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:08:14,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-28 00:08:14,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-28 00:08:14,019 INFO L175 Difference]: Start difference. First operand has 428 places, 491 transitions, 9295 flow. Second operand 10 states and 217 transitions. [2024-06-28 00:08:14,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 539 transitions, 11427 flow [2024-06-28 00:08:17,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 539 transitions, 11095 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-28 00:08:17,594 INFO L231 Difference]: Finished difference. Result has 434 places, 498 transitions, 9729 flow [2024-06-28 00:08:17,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8963, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9729, PETRI_PLACES=434, PETRI_TRANSITIONS=498} [2024-06-28 00:08:17,594 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-28 00:08:17,594 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 498 transitions, 9729 flow [2024-06-28 00:08:17,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:17,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:17,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:17,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 00:08:17,594 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)] === [2024-06-28 00:08:17,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:17,595 INFO L85 PathProgramCache]: Analyzing trace with hash -32769145, now seen corresponding path program 11 times [2024-06-28 00:08:17,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:17,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397013793] [2024-06-28 00:08:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:17,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:18,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:18,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397013793] [2024-06-28 00:08:18,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397013793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:18,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:18,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:18,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227478059] [2024-06-28 00:08:18,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:18,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:18,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:18,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:18,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:18,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:08:18,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 498 transitions, 9729 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:18,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:18,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:08:18,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:20,687 INFO L124 PetriNetUnfolderBase]: 5746/9912 cut-off events. [2024-06-28 00:08:20,687 INFO L125 PetriNetUnfolderBase]: For 1670479/1670485 co-relation queries the response was YES. [2024-06-28 00:08:20,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110873 conditions, 9912 events. 5746/9912 cut-off events. For 1670479/1670485 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 78825 event pairs, 1078 based on Foata normal form. 15/9909 useless extension candidates. Maximal degree in co-relation 110700. Up to 3811 conditions per place. [2024-06-28 00:08:20,860 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 379 selfloop transitions, 167 changer transitions 1/554 dead transitions. [2024-06-28 00:08:20,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 554 transitions, 12356 flow [2024-06-28 00:08:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:08:20,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:08:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-28 00:08:20,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-28 00:08:20,861 INFO L175 Difference]: Start difference. First operand has 434 places, 498 transitions, 9729 flow. Second operand 10 states and 224 transitions. [2024-06-28 00:08:20,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 554 transitions, 12356 flow [2024-06-28 00:08:24,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 554 transitions, 11922 flow, removed 126 selfloop flow, removed 6 redundant places. [2024-06-28 00:08:24,618 INFO L231 Difference]: Finished difference. Result has 438 places, 501 transitions, 9805 flow [2024-06-28 00:08:24,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9371, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9805, PETRI_PLACES=438, PETRI_TRANSITIONS=501} [2024-06-28 00:08:24,619 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-28 00:08:24,619 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 501 transitions, 9805 flow [2024-06-28 00:08:24,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:24,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:24,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:24,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 00:08:24,619 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)] === [2024-06-28 00:08:24,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1624999529, now seen corresponding path program 12 times [2024-06-28 00:08:24,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:24,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774028692] [2024-06-28 00:08:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:24,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:25,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:25,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774028692] [2024-06-28 00:08:25,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774028692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:25,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:25,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:25,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349169842] [2024-06-28 00:08:25,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:25,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:25,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:25,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:25,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:25,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:08:25,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 501 transitions, 9805 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:25,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:25,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:08:25,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:27,575 INFO L124 PetriNetUnfolderBase]: 5738/9904 cut-off events. [2024-06-28 00:08:27,575 INFO L125 PetriNetUnfolderBase]: For 1665274/1665280 co-relation queries the response was YES. [2024-06-28 00:08:27,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110697 conditions, 9904 events. 5738/9904 cut-off events. For 1665274/1665280 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 78792 event pairs, 1449 based on Foata normal form. 9/9895 useless extension candidates. Maximal degree in co-relation 110524. Up to 3811 conditions per place. [2024-06-28 00:08:27,752 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 374 selfloop transitions, 167 changer transitions 1/549 dead transitions. [2024-06-28 00:08:27,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 549 transitions, 11964 flow [2024-06-28 00:08:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:08:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:08:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-28 00:08:27,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-28 00:08:27,753 INFO L175 Difference]: Start difference. First operand has 438 places, 501 transitions, 9805 flow. Second operand 11 states and 236 transitions. [2024-06-28 00:08:27,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 549 transitions, 11964 flow [2024-06-28 00:08:31,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 549 transitions, 11564 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-28 00:08:31,892 INFO L231 Difference]: Finished difference. Result has 441 places, 504 transitions, 9846 flow [2024-06-28 00:08:31,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9405, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9846, PETRI_PLACES=441, PETRI_TRANSITIONS=504} [2024-06-28 00:08:31,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-28 00:08:31,892 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 504 transitions, 9846 flow [2024-06-28 00:08:31,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:31,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:31,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:31,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 00:08:31,893 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)] === [2024-06-28 00:08:31,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:31,893 INFO L85 PathProgramCache]: Analyzing trace with hash 110941895, now seen corresponding path program 13 times [2024-06-28 00:08:31,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:31,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099378081] [2024-06-28 00:08:31,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:31,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:32,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:32,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099378081] [2024-06-28 00:08:32,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099378081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:32,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:32,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:32,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010493914] [2024-06-28 00:08:32,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:32,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:32,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:32,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:32,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:32,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:08:32,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 504 transitions, 9846 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:32,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:32,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:08:32,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:35,446 INFO L124 PetriNetUnfolderBase]: 5684/9821 cut-off events. [2024-06-28 00:08:35,446 INFO L125 PetriNetUnfolderBase]: For 1672790/1672796 co-relation queries the response was YES. [2024-06-28 00:08:35,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107558 conditions, 9821 events. 5684/9821 cut-off events. For 1672790/1672796 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 78239 event pairs, 1566 based on Foata normal form. 33/9831 useless extension candidates. Maximal degree in co-relation 107384. Up to 7780 conditions per place. [2024-06-28 00:08:35,812 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 395 selfloop transitions, 109 changer transitions 24/535 dead transitions. [2024-06-28 00:08:35,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 535 transitions, 11428 flow [2024-06-28 00:08:35,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:08:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:08:35,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-28 00:08:35,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-28 00:08:35,813 INFO L175 Difference]: Start difference. First operand has 441 places, 504 transitions, 9846 flow. Second operand 9 states and 186 transitions. [2024-06-28 00:08:35,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 535 transitions, 11428 flow [2024-06-28 00:08:39,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 535 transitions, 11039 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-28 00:08:39,650 INFO L231 Difference]: Finished difference. Result has 442 places, 494 transitions, 9514 flow [2024-06-28 00:08:39,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9457, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9514, PETRI_PLACES=442, PETRI_TRANSITIONS=494} [2024-06-28 00:08:39,651 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 401 predicate places. [2024-06-28 00:08:39,651 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 494 transitions, 9514 flow [2024-06-28 00:08:39,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:39,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:39,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:39,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 00:08:39,651 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)] === [2024-06-28 00:08:39,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:39,652 INFO L85 PathProgramCache]: Analyzing trace with hash -802540390, now seen corresponding path program 1 times [2024-06-28 00:08:39,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:39,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021845591] [2024-06-28 00:08:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:39,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:40,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:40,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021845591] [2024-06-28 00:08:40,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021845591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:40,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:40,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:40,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342736877] [2024-06-28 00:08:40,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:40,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:40,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:40,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:40,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:40,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:08:40,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 494 transitions, 9514 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:40,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:40,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:08:40,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:42,799 INFO L124 PetriNetUnfolderBase]: 5332/9201 cut-off events. [2024-06-28 00:08:42,799 INFO L125 PetriNetUnfolderBase]: For 1459287/1459287 co-relation queries the response was YES. [2024-06-28 00:08:42,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99261 conditions, 9201 events. 5332/9201 cut-off events. For 1459287/1459287 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 72397 event pairs, 1549 based on Foata normal form. 4/9184 useless extension candidates. Maximal degree in co-relation 99086. Up to 7504 conditions per place. [2024-06-28 00:08:42,945 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 428 selfloop transitions, 76 changer transitions 0/511 dead transitions. [2024-06-28 00:08:42,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 511 transitions, 10834 flow [2024-06-28 00:08:42,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:08:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:08:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-28 00:08:42,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-28 00:08:42,946 INFO L175 Difference]: Start difference. First operand has 442 places, 494 transitions, 9514 flow. Second operand 6 states and 128 transitions. [2024-06-28 00:08:42,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 511 transitions, 10834 flow [2024-06-28 00:08:46,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 511 transitions, 10542 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 00:08:46,692 INFO L231 Difference]: Finished difference. Result has 434 places, 496 transitions, 9481 flow [2024-06-28 00:08:46,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9228, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9481, PETRI_PLACES=434, PETRI_TRANSITIONS=496} [2024-06-28 00:08:46,692 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-28 00:08:46,692 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 496 transitions, 9481 flow [2024-06-28 00:08:46,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:46,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:46,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:46,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 00:08:46,693 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)] === [2024-06-28 00:08:46,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:46,693 INFO L85 PathProgramCache]: Analyzing trace with hash -918212891, now seen corresponding path program 14 times [2024-06-28 00:08:46,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:46,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695422231] [2024-06-28 00:08:46,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:46,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:47,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:47,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695422231] [2024-06-28 00:08:47,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695422231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:47,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:47,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:47,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819964134] [2024-06-28 00:08:47,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:47,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:47,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:47,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:47,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:47,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:08:47,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 496 transitions, 9481 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:47,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:47,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:08:47,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:49,888 INFO L124 PetriNetUnfolderBase]: 5278/9126 cut-off events. [2024-06-28 00:08:49,896 INFO L125 PetriNetUnfolderBase]: For 1383803/1383803 co-relation queries the response was YES. [2024-06-28 00:08:50,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95264 conditions, 9126 events. 5278/9126 cut-off events. For 1383803/1383803 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 72046 event pairs, 1430 based on Foata normal form. 27/9128 useless extension candidates. Maximal degree in co-relation 95091. Up to 7660 conditions per place. [2024-06-28 00:08:50,046 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 447 selfloop transitions, 43 changer transitions 24/521 dead transitions. [2024-06-28 00:08:50,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 521 transitions, 10824 flow [2024-06-28 00:08:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:08:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:08:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 00:08:50,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503125 [2024-06-28 00:08:50,047 INFO L175 Difference]: Start difference. First operand has 434 places, 496 transitions, 9481 flow. Second operand 8 states and 161 transitions. [2024-06-28 00:08:50,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 521 transitions, 10824 flow [2024-06-28 00:08:53,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 521 transitions, 10713 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 00:08:53,316 INFO L231 Difference]: Finished difference. Result has 438 places, 487 transitions, 9203 flow [2024-06-28 00:08:53,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9370, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9203, PETRI_PLACES=438, PETRI_TRANSITIONS=487} [2024-06-28 00:08:53,316 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 397 predicate places. [2024-06-28 00:08:53,316 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 487 transitions, 9203 flow [2024-06-28 00:08:53,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:53,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:53,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:53,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 00:08:53,317 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)] === [2024-06-28 00:08:53,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:53,317 INFO L85 PathProgramCache]: Analyzing trace with hash -921014020, now seen corresponding path program 2 times [2024-06-28 00:08:53,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:53,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808759666] [2024-06-28 00:08:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:53,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:08:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:08:53,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:08:53,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808759666] [2024-06-28 00:08:53,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808759666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:08:53,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:08:53,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:08:53,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272272613] [2024-06-28 00:08:53,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:08:53,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:08:53,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:08:53,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:08:53,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:08:53,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 00:08:53,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 487 transitions, 9203 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:53,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:08:53,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 00:08:53,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:08:56,158 INFO L124 PetriNetUnfolderBase]: 5097/8799 cut-off events. [2024-06-28 00:08:56,158 INFO L125 PetriNetUnfolderBase]: For 1239564/1239564 co-relation queries the response was YES. [2024-06-28 00:08:56,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91546 conditions, 8799 events. 5097/8799 cut-off events. For 1239564/1239564 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 68752 event pairs, 1398 based on Foata normal form. 4/8778 useless extension candidates. Maximal degree in co-relation 91373. Up to 7604 conditions per place. [2024-06-28 00:08:56,428 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 450 selfloop transitions, 46 changer transitions 0/502 dead transitions. [2024-06-28 00:08:56,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 502 transitions, 10268 flow [2024-06-28 00:08:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:08:56,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:08:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 00:08:56,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 00:08:56,429 INFO L175 Difference]: Start difference. First operand has 438 places, 487 transitions, 9203 flow. Second operand 7 states and 130 transitions. [2024-06-28 00:08:56,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 502 transitions, 10268 flow [2024-06-28 00:08:59,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 502 transitions, 10029 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-28 00:08:59,540 INFO L231 Difference]: Finished difference. Result has 428 places, 488 transitions, 9096 flow [2024-06-28 00:08:59,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8965, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9096, PETRI_PLACES=428, PETRI_TRANSITIONS=488} [2024-06-28 00:08:59,540 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-28 00:08:59,540 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 488 transitions, 9096 flow [2024-06-28 00:08:59,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:08:59,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:08:59,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:08:59,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-28 00:08:59,540 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)] === [2024-06-28 00:08:59,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:08:59,541 INFO L85 PathProgramCache]: Analyzing trace with hash -546033928, now seen corresponding path program 1 times [2024-06-28 00:08:59,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:08:59,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454901737] [2024-06-28 00:08:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:08:59,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:08:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:09:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:09:00,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:09:00,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454901737] [2024-06-28 00:09:00,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454901737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:09:00,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:09:00,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:09:00,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955934343] [2024-06-28 00:09:00,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:09:00,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:09:00,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:09:00,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:09:00,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:09:00,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:09:00,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 488 transitions, 9096 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:09:00,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:09:00,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:09:00,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:09:02,560 INFO L124 PetriNetUnfolderBase]: 5084/8781 cut-off events. [2024-06-28 00:09:02,560 INFO L125 PetriNetUnfolderBase]: For 1202060/1202066 co-relation queries the response was YES. [2024-06-28 00:09:02,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89915 conditions, 8781 events. 5084/8781 cut-off events. For 1202060/1202066 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 68916 event pairs, 1892 based on Foata normal form. 12/8772 useless extension candidates. Maximal degree in co-relation 89746. Up to 7765 conditions per place. [2024-06-28 00:09:02,713 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 458 selfloop transitions, 42 changer transitions 0/506 dead transitions. [2024-06-28 00:09:02,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 506 transitions, 10272 flow [2024-06-28 00:09:02,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:09:02,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:09:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 00:09:02,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-28 00:09:02,714 INFO L175 Difference]: Start difference. First operand has 428 places, 488 transitions, 9096 flow. Second operand 9 states and 153 transitions. [2024-06-28 00:09:02,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 506 transitions, 10272 flow [2024-06-28 00:09:05,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 506 transitions, 10158 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 00:09:05,918 INFO L231 Difference]: Finished difference. Result has 431 places, 488 transitions, 9076 flow [2024-06-28 00:09:05,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8982, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9076, PETRI_PLACES=431, PETRI_TRANSITIONS=488} [2024-06-28 00:09:05,918 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-28 00:09:05,919 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 488 transitions, 9076 flow [2024-06-28 00:09:05,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:09:05,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:09:05,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:09:05,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-28 00:09:05,919 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)] === [2024-06-28 00:09:05,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:09:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash -909931985, now seen corresponding path program 1 times [2024-06-28 00:09:05,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:09:05,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710324130] [2024-06-28 00:09:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:09:05,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:09:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:09:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:09:06,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:09:06,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710324130] [2024-06-28 00:09:06,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710324130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:09:06,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:09:06,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:09:06,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978946647] [2024-06-28 00:09:06,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:09:06,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:09:06,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:09:06,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:09:06,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:09:06,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-28 00:09:06,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 488 transitions, 9076 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:09:06,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:09:06,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-28 00:09:06,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:09:08,930 INFO L124 PetriNetUnfolderBase]: 5062/8746 cut-off events. [2024-06-28 00:09:08,930 INFO L125 PetriNetUnfolderBase]: For 1194200/1194200 co-relation queries the response was YES. [2024-06-28 00:09:09,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88144 conditions, 8746 events. 5062/8746 cut-off events. For 1194200/1194200 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 68391 event pairs, 1476 based on Foata normal form. 20/8745 useless extension candidates. Maximal degree in co-relation 87975. Up to 7431 conditions per place. [2024-06-28 00:09:09,072 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 452 selfloop transitions, 55 changer transitions 0/513 dead transitions. [2024-06-28 00:09:09,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 513 transitions, 10316 flow [2024-06-28 00:09:09,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:09:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:09:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 00:09:09,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 00:09:09,073 INFO L175 Difference]: Start difference. First operand has 431 places, 488 transitions, 9076 flow. Second operand 9 states and 160 transitions. [2024-06-28 00:09:09,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 513 transitions, 10316 flow [2024-06-28 00:09:12,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 513 transitions, 9951 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-28 00:09:12,501 INFO L231 Difference]: Finished difference. Result has 431 places, 489 transitions, 8879 flow [2024-06-28 00:09:12,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8720, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8879, PETRI_PLACES=431, PETRI_TRANSITIONS=489} [2024-06-28 00:09:12,501 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-28 00:09:12,502 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 489 transitions, 8879 flow [2024-06-28 00:09:12,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:09:12,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:09:12,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:09:12,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-28 00:09:12,502 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)] === [2024-06-28 00:09:12,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:09:12,502 INFO L85 PathProgramCache]: Analyzing trace with hash -802540235, now seen corresponding path program 2 times [2024-06-28 00:09:12,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:09:12,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262480794] [2024-06-28 00:09:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:09:12,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:09:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:09:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:09:12,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:09:12,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262480794] [2024-06-28 00:09:12,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262480794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:09:12,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:09:12,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:09:12,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397541698] [2024-06-28 00:09:12,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:09:12,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:09:12,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:09:12,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:09:12,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:09:13,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:09:13,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 489 transitions, 8879 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:09:13,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:09:13,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:09:13,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:09:15,351 INFO L124 PetriNetUnfolderBase]: 5082/8788 cut-off events. [2024-06-28 00:09:15,351 INFO L125 PetriNetUnfolderBase]: For 1133775/1133775 co-relation queries the response was YES. [2024-06-28 00:09:15,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87244 conditions, 8788 events. 5082/8788 cut-off events. For 1133775/1133775 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 68752 event pairs, 1350 based on Foata normal form. 6/8771 useless extension candidates. Maximal degree in co-relation 87076. Up to 7127 conditions per place. [2024-06-28 00:09:15,494 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 420 selfloop transitions, 81 changer transitions 0/508 dead transitions. [2024-06-28 00:09:15,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 508 transitions, 10057 flow [2024-06-28 00:09:15,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:09:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:09:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-28 00:09:15,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-28 00:09:15,495 INFO L175 Difference]: Start difference. First operand has 431 places, 489 transitions, 8879 flow. Second operand 7 states and 145 transitions. [2024-06-28 00:09:15,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 508 transitions, 10057 flow [2024-06-28 00:09:18,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 508 transitions, 9859 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-28 00:09:18,650 INFO L231 Difference]: Finished difference. Result has 430 places, 490 transitions, 8886 flow [2024-06-28 00:09:18,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8683, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8886, PETRI_PLACES=430, PETRI_TRANSITIONS=490} [2024-06-28 00:09:18,650 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 389 predicate places. [2024-06-28 00:09:18,650 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 490 transitions, 8886 flow [2024-06-28 00:09:18,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:09:18,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:09:18,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:09:18,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-28 00:09:18,651 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)] === [2024-06-28 00:09:18,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:09:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash -802742231, now seen corresponding path program 15 times [2024-06-28 00:09:18,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:09:18,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488945937] [2024-06-28 00:09:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:09:18,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:09:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:09:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:09:19,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:09:19,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488945937] [2024-06-28 00:09:19,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488945937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:09:19,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:09:19,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:09:19,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656763687] [2024-06-28 00:09:19,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:09:19,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:09:19,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:09:19,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:09:19,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:09:19,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:09:19,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 490 transitions, 8886 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:09:19,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:09:19,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:09:19,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:09:21,557 INFO L124 PetriNetUnfolderBase]: 5209/9011 cut-off events. [2024-06-28 00:09:21,557 INFO L125 PetriNetUnfolderBase]: For 1209820/1209820 co-relation queries the response was YES. [2024-06-28 00:09:21,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90175 conditions, 9011 events. 5209/9011 cut-off events. For 1209820/1209820 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 70926 event pairs, 1358 based on Foata normal form. 9/8997 useless extension candidates. Maximal degree in co-relation 90007. Up to 6115 conditions per place. [2024-06-28 00:09:21,692 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 412 selfloop transitions, 102 changer transitions 0/521 dead transitions. [2024-06-28 00:09:21,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 521 transitions, 10639 flow [2024-06-28 00:09:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:09:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:09:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-28 00:09:21,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.534375 [2024-06-28 00:09:21,693 INFO L175 Difference]: Start difference. First operand has 430 places, 490 transitions, 8886 flow. Second operand 8 states and 171 transitions. [2024-06-28 00:09:21,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 521 transitions, 10639 flow [2024-06-28 00:09:24,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 521 transitions, 10474 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 00:09:24,852 INFO L231 Difference]: Finished difference. Result has 433 places, 493 transitions, 9033 flow [2024-06-28 00:09:24,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8721, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9033, PETRI_PLACES=433, PETRI_TRANSITIONS=493} [2024-06-28 00:09:24,852 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 392 predicate places. [2024-06-28 00:09:24,852 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 493 transitions, 9033 flow [2024-06-28 00:09:24,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:09:24,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:09:24,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:09:24,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-28 00:09:24,852 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)] === [2024-06-28 00:09:24,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:09:24,853 INFO L85 PathProgramCache]: Analyzing trace with hash -802921721, now seen corresponding path program 16 times [2024-06-28 00:09:24,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:09:24,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112345760] [2024-06-28 00:09:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:09:24,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:09:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:09:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:09:25,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:09:25,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112345760] [2024-06-28 00:09:25,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112345760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:09:25,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:09:25,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:09:25,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122982129] [2024-06-28 00:09:25,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:09:25,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:09:25,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:09:25,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:09:25,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:09:25,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-06-28 00:09:25,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 493 transitions, 9033 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:09:25,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:09:25,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-06-28 00:09:25,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:09:27,566 INFO L124 PetriNetUnfolderBase]: 5155/8926 cut-off events. [2024-06-28 00:09:27,566 INFO L125 PetriNetUnfolderBase]: For 1201035/1201035 co-relation queries the response was YES. [2024-06-28 00:09:27,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87582 conditions, 8926 events. 5155/8926 cut-off events. For 1201035/1201035 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 70309 event pairs, 1402 based on Foata normal form. 27/8928 useless extension candidates. Maximal degree in co-relation 87413. Up to 7218 conditions per place. [2024-06-28 00:09:27,704 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 413 selfloop transitions, 71 changer transitions 28/519 dead transitions. [2024-06-28 00:09:27,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 519 transitions, 10356 flow [2024-06-28 00:09:27,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:09:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:09:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-28 00:09:27,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-28 00:09:27,705 INFO L175 Difference]: Start difference. First operand has 433 places, 493 transitions, 9033 flow. Second operand 8 states and 164 transitions. [2024-06-28 00:09:27,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 519 transitions, 10356 flow