./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_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.2024-05-21_14-57-05.files/protection/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_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-76401ed-m [2024-06-20 15:13:48,011 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:13:48,049 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:13:48,056 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:13:48,056 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:13:48,079 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:13:48,081 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:13:48,082 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:13:48,083 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:13:48,086 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:13:48,086 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:13:48,086 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:13:48,087 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:13:48,088 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:13:48,089 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:13:48,089 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:13:48,089 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:13:48,089 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:13:48,089 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:13:48,090 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:13:48,090 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:13:48,090 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:13:48,090 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:13:48,091 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:13:48,091 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:13:48,091 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:13:48,091 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:13:48,091 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:13:48,092 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:13:48,092 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:13:48,093 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:13:48,094 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:13:48,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:13:48,094 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:13:48,095 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:13:48,095 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:13:48,095 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:13:48,095 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:13:48,095 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:13:48,096 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:13:48,096 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:13:48,096 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:13:48,096 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:13:48,096 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:13:48,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:13:48,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:13:48,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:13:48,353 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:13:48,354 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:13:48,355 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:13:49,424 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:13:49,654 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:13:49,659 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:13:49,674 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4daffca6d/576c5cd507624dd9b7a9c02439372f31/FLAG5e8e363b8 [2024-06-20 15:13:49,687 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4daffca6d/576c5cd507624dd9b7a9c02439372f31 [2024-06-20 15:13:49,689 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:13:49,689 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:13:49,690 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-20 15:13:49,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:13:49,799 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:13:49,800 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:13:49,800 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:13:49,815 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:13:49,816 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:13:49" (1/2) ... [2024-06-20 15:13:49,817 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8768fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:49, skipping insertion in model container [2024-06-20 15:13:49,817 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:13:49" (1/2) ... [2024-06-20 15:13:49,818 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2dc31a57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:13:49, skipping insertion in model container [2024-06-20 15:13:49,818 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:49" (2/2) ... [2024-06-20 15:13:49,819 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8768fb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:49, skipping insertion in model container [2024-06-20 15:13:49,819 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:49" (2/2) ... [2024-06-20 15:13:49,819 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:13:49,864 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:13:49,865 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 15:13:49,866 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 15:13:49,866 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 15:13:49,866 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:13:49,867 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-20 15:13:49,904 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:13:50,183 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:13:50,194 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:13:50,268 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:13:50,294 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:13:50,294 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:50 WrapperNode [2024-06-20 15:13:50,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:13:50,295 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:13:50,295 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:13:50,296 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:13:50,300 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 20.06 03:13:50" (1/1) ... [2024-06-20 15:13:50,326 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 20.06 03:13:50" (1/1) ... [2024-06-20 15:13:50,357 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-20 15:13:50,358 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:13:50,359 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:13:50,359 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:13:50,359 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:13:50,366 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:50" (1/1) ... [2024-06-20 15:13:50,367 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:50" (1/1) ... [2024-06-20 15:13:50,370 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:50" (1/1) ... [2024-06-20 15:13:50,388 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]. [2024-06-20 15:13:50,388 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:50" (1/1) ... [2024-06-20 15:13:50,389 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:50" (1/1) ... [2024-06-20 15:13:50,405 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:50" (1/1) ... [2024-06-20 15:13:50,408 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:50" (1/1) ... [2024-06-20 15:13:50,409 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:50" (1/1) ... [2024-06-20 15:13:50,413 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:50" (1/1) ... [2024-06-20 15:13:50,415 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:13:50,419 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:13:50,419 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:13:50,419 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:13:50,420 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:50" (1/1) ... [2024-06-20 15:13:50,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:13:50,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:13:50,443 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) [2024-06-20 15:13:50,462 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 [2024-06-20 15:13:50,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:13:50,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:13:50,477 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:13:50,477 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:13:50,477 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:13:50,478 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:13:50,478 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:13:50,478 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:13:50,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:13:50,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:13:50,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:13:50,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:13:50,480 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:13:50,604 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:13:50,607 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:13:50,799 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:13:50,801 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:13:50,885 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:13:50,885 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:13:50,885 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:13:50 BoogieIcfgContainer [2024-06-20 15:13:50,885 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:13:50,887 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:13:50,887 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:13:50,889 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:13:50,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:13:49" (1/4) ... [2024-06-20 15:13:50,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44aec5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:13:50, skipping insertion in model container [2024-06-20 15:13:50,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:13:49" (2/4) ... [2024-06-20 15:13:50,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44aec5f7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:13:50, skipping insertion in model container [2024-06-20 15:13:50,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:13:50" (3/4) ... [2024-06-20 15:13:50,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44aec5f7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:13:50, skipping insertion in model container [2024-06-20 15:13:50,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:13:50" (4/4) ... [2024-06-20 15:13:50,891 INFO L112 eAbstractionObserver]: Analyzing ICFG safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 15:13:50,907 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:13:50,908 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:13:50,908 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:13:50,939 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:13:50,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 15:13:50,986 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 15:13:50,987 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:13:50,988 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 61 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. [2024-06-20 15:13:50,988 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 15:13:50,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 15:13:50,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:13:51,002 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;@2dc65505, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:13:51,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:13:51,005 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:13:51,005 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:13:51,005 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:13:51,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:51,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:13:51,006 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)] === [2024-06-20 15:13:51,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:51,010 INFO L85 PathProgramCache]: Analyzing trace with hash 219098506, now seen corresponding path program 1 times [2024-06-20 15:13:51,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:51,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689758301] [2024-06-20 15:13:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:51,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:51,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:51,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689758301] [2024-06-20 15:13:51,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689758301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:51,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:51,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:13:51,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175138439] [2024-06-20 15:13:51,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:51,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:13:51,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:51,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:13:51,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:13:51,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-20 15:13:51,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:51,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:51,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-20 15:13:51,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:51,742 INFO L124 PetriNetUnfolderBase]: 471/807 cut-off events. [2024-06-20 15:13:51,743 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-20 15:13:51,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 807 events. 471/807 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3881 event pairs, 288 based on Foata normal form. 1/786 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-20 15:13:51,754 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-20 15:13:51,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 159 flow [2024-06-20 15:13:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:13:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:13:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-20 15:13:51,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-06-20 15:13:51,766 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 85 transitions. [2024-06-20 15:13:51,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 159 flow [2024-06-20 15:13:51,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:51,771 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 15:13:51,772 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} [2024-06-20 15:13:51,775 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 15:13:51,775 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 15:13:51,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:51,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:51,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:51,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:13:51,776 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)] === [2024-06-20 15:13:51,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:51,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1165332823, now seen corresponding path program 1 times [2024-06-20 15:13:51,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:51,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335686461] [2024-06-20 15:13:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:51,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:52,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:52,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335686461] [2024-06-20 15:13:52,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335686461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:52,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:52,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:52,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006229255] [2024-06-20 15:13:52,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:52,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:52,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:52,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:52,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:52,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:52,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:52,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:52,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:52,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:52,322 INFO L124 PetriNetUnfolderBase]: 754/1256 cut-off events. [2024-06-20 15:13:52,322 INFO L125 PetriNetUnfolderBase]: For 195/205 co-relation queries the response was YES. [2024-06-20 15:13:52,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2858 conditions, 1256 events. 754/1256 cut-off events. For 195/205 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6202 event pairs, 318 based on Foata normal form. 6/1258 useless extension candidates. Maximal degree in co-relation 2846. Up to 1124 conditions per place. [2024-06-20 15:13:52,329 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-20 15:13:52,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 250 flow [2024-06-20 15:13:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-20 15:13:52,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-06-20 15:13:52,331 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 107 transitions. [2024-06-20 15:13:52,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 250 flow [2024-06-20 15:13:52,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:52,333 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-20 15:13:52,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-20 15:13:52,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-20 15:13:52,334 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-20 15:13:52,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:52,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:52,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:52,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:13:52,335 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:52,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:52,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1101657832, now seen corresponding path program 1 times [2024-06-20 15:13:52,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:52,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208966592] [2024-06-20 15:13:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:52,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:52,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:52,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208966592] [2024-06-20 15:13:52,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208966592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:52,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:52,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:52,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596109529] [2024-06-20 15:13:52,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:52,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:52,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:52,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:52,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:52,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:52,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:52,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:52,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:52,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:52,669 INFO L124 PetriNetUnfolderBase]: 745/1241 cut-off events. [2024-06-20 15:13:52,670 INFO L125 PetriNetUnfolderBase]: For 594/630 co-relation queries the response was YES. [2024-06-20 15:13:52,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3172 conditions, 1241 events. 745/1241 cut-off events. For 594/630 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6088 event pairs, 218 based on Foata normal form. 19/1256 useless extension candidates. Maximal degree in co-relation 3157. Up to 1079 conditions per place. [2024-06-20 15:13:52,676 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 44 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2024-06-20 15:13:52,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 310 flow [2024-06-20 15:13:52,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:52,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:52,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-20 15:13:52,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-20 15:13:52,678 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 128 transitions. [2024-06-20 15:13:52,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 310 flow [2024-06-20 15:13:52,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 308 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:52,680 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 181 flow [2024-06-20 15:13:52,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-06-20 15:13:52,681 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-20 15:13:52,681 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 181 flow [2024-06-20 15:13:52,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:52,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:52,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:52,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:13:52,682 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)] === [2024-06-20 15:13:52,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:52,682 INFO L85 PathProgramCache]: Analyzing trace with hash -2113468487, now seen corresponding path program 1 times [2024-06-20 15:13:52,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:52,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812995985] [2024-06-20 15:13:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:52,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:52,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:52,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812995985] [2024-06-20 15:13:52,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812995985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:52,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:52,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:52,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326564881] [2024-06-20 15:13:52,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:52,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:52,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:52,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:52,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:52,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:52,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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) [2024-06-20 15:13:52,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:52,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:52,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:52,970 INFO L124 PetriNetUnfolderBase]: 697/1162 cut-off events. [2024-06-20 15:13:52,971 INFO L125 PetriNetUnfolderBase]: For 1029/1029 co-relation queries the response was YES. [2024-06-20 15:13:52,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3245 conditions, 1162 events. 697/1162 cut-off events. For 1029/1029 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5827 event pairs, 308 based on Foata normal form. 2/1162 useless extension candidates. Maximal degree in co-relation 3227. Up to 1047 conditions per place. [2024-06-20 15:13:52,977 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 44 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-20 15:13:52,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 60 transitions, 350 flow [2024-06-20 15:13:52,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-20 15:13:52,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:13:52,979 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 181 flow. Second operand 4 states and 102 transitions. [2024-06-20 15:13:52,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 60 transitions, 350 flow [2024-06-20 15:13:52,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 325 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:52,982 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 229 flow [2024-06-20 15:13:52,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=229, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-06-20 15:13:52,983 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-20 15:13:52,983 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 229 flow [2024-06-20 15:13:52,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 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) [2024-06-20 15:13:52,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:52,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:52,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:13:52,984 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)] === [2024-06-20 15:13:52,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:52,985 INFO L85 PathProgramCache]: Analyzing trace with hash 298840478, now seen corresponding path program 1 times [2024-06-20 15:13:52,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:52,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369611548] [2024-06-20 15:13:52,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:52,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:53,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:53,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369611548] [2024-06-20 15:13:53,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369611548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:53,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:53,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:53,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729570196] [2024-06-20 15:13:53,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:53,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:53,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:53,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:53,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:53,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:53,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:53,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:53,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:53,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:53,307 INFO L124 PetriNetUnfolderBase]: 826/1387 cut-off events. [2024-06-20 15:13:53,329 INFO L125 PetriNetUnfolderBase]: For 1901/1945 co-relation queries the response was YES. [2024-06-20 15:13:53,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4179 conditions, 1387 events. 826/1387 cut-off events. For 1901/1945 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7004 event pairs, 293 based on Foata normal form. 16/1383 useless extension candidates. Maximal degree in co-relation 4159. Up to 1177 conditions per place. [2024-06-20 15:13:53,336 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 47 selfloop transitions, 18 changer transitions 0/75 dead transitions. [2024-06-20 15:13:53,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 459 flow [2024-06-20 15:13:53,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 15:13:53,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.655 [2024-06-20 15:13:53,338 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 229 flow. Second operand 5 states and 131 transitions. [2024-06-20 15:13:53,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 459 flow [2024-06-20 15:13:53,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 75 transitions, 457 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:53,342 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 309 flow [2024-06-20 15:13:53,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-20 15:13:53,342 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-06-20 15:13:53,342 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 309 flow [2024-06-20 15:13:53,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:53,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:53,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:53,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:13:53,343 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)] === [2024-06-20 15:13:53,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:53,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2136706782, now seen corresponding path program 2 times [2024-06-20 15:13:53,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:53,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346060061] [2024-06-20 15:13:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:53,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:53,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:53,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346060061] [2024-06-20 15:13:53,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346060061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:53,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:53,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:53,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706704736] [2024-06-20 15:13:53,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:53,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:53,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:53,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:53,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:53,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:53,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 309 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:53,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:53,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:53,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:53,691 INFO L124 PetriNetUnfolderBase]: 821/1380 cut-off events. [2024-06-20 15:13:53,691 INFO L125 PetriNetUnfolderBase]: For 3008/3070 co-relation queries the response was YES. [2024-06-20 15:13:53,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4570 conditions, 1380 events. 821/1380 cut-off events. For 3008/3070 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6947 event pairs, 293 based on Foata normal form. 18/1379 useless extension candidates. Maximal degree in co-relation 4547. Up to 1181 conditions per place. [2024-06-20 15:13:53,700 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 44 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-06-20 15:13:53,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 465 flow [2024-06-20 15:13:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:53,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-20 15:13:53,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-06-20 15:13:53,701 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 309 flow. Second operand 4 states and 107 transitions. [2024-06-20 15:13:53,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 465 flow [2024-06-20 15:13:53,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 440 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-20 15:13:53,707 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 328 flow [2024-06-20 15:13:53,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-20 15:13:53,708 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-20 15:13:53,708 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 328 flow [2024-06-20 15:13:53,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:53,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:53,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:53,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:13:53,709 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:53,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:53,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1466029098, now seen corresponding path program 1 times [2024-06-20 15:13:53,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:53,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755161463] [2024-06-20 15:13:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:53,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:53,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:53,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755161463] [2024-06-20 15:13:53,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755161463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:53,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:53,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:13:53,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944481866] [2024-06-20 15:13:53,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:53,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:13:53,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:13:53,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:13:53,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:53,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:53,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:53,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:53,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:54,012 INFO L124 PetriNetUnfolderBase]: 697/1172 cut-off events. [2024-06-20 15:13:54,013 INFO L125 PetriNetUnfolderBase]: For 3080/3082 co-relation queries the response was YES. [2024-06-20 15:13:54,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1172 events. 697/1172 cut-off events. For 3080/3082 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5931 event pairs, 278 based on Foata normal form. 6/1176 useless extension candidates. Maximal degree in co-relation 4029. Up to 1029 conditions per place. [2024-06-20 15:13:54,019 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 55 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2024-06-20 15:13:54,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 513 flow [2024-06-20 15:13:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-20 15:13:54,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-20 15:13:54,021 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 328 flow. Second operand 5 states and 124 transitions. [2024-06-20 15:13:54,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 513 flow [2024-06-20 15:13:54,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 483 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:54,025 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 339 flow [2024-06-20 15:13:54,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-20 15:13:54,025 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-20 15:13:54,026 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 339 flow [2024-06-20 15:13:54,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:54,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:54,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:54,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:13:54,026 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)] === [2024-06-20 15:13:54,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:54,027 INFO L85 PathProgramCache]: Analyzing trace with hash 674120920, now seen corresponding path program 1 times [2024-06-20 15:13:54,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:54,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216865211] [2024-06-20 15:13:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:54,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:54,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:54,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216865211] [2024-06-20 15:13:54,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216865211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:54,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:54,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:54,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926746197] [2024-06-20 15:13:54,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:54,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:54,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:54,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:54,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:54,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:54,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:54,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:54,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:54,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:54,358 INFO L124 PetriNetUnfolderBase]: 888/1471 cut-off events. [2024-06-20 15:13:54,359 INFO L125 PetriNetUnfolderBase]: For 4342/4346 co-relation queries the response was YES. [2024-06-20 15:13:54,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5175 conditions, 1471 events. 888/1471 cut-off events. For 4342/4346 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7289 event pairs, 323 based on Foata normal form. 6/1474 useless extension candidates. Maximal degree in co-relation 5149. Up to 1228 conditions per place. [2024-06-20 15:13:54,368 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 69 selfloop transitions, 19 changer transitions 0/95 dead transitions. [2024-06-20 15:13:54,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 95 transitions, 689 flow [2024-06-20 15:13:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:13:54,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:13:54,370 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 339 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:13:54,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 95 transitions, 689 flow [2024-06-20 15:13:54,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 666 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:54,375 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 465 flow [2024-06-20 15:13:54,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=465, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-20 15:13:54,376 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-20 15:13:54,376 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 465 flow [2024-06-20 15:13:54,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:54,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:54,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:54,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:13:54,377 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)] === [2024-06-20 15:13:54,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:54,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1813407076, now seen corresponding path program 2 times [2024-06-20 15:13:54,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:54,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428156156] [2024-06-20 15:13:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:54,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:54,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:54,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428156156] [2024-06-20 15:13:54,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428156156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:54,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:54,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:54,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179250071] [2024-06-20 15:13:54,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:54,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:54,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:54,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:54,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:54,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:54,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 465 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:54,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:54,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:54,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:54,756 INFO L124 PetriNetUnfolderBase]: 899/1494 cut-off events. [2024-06-20 15:13:54,757 INFO L125 PetriNetUnfolderBase]: For 5627/5637 co-relation queries the response was YES. [2024-06-20 15:13:54,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5642 conditions, 1494 events. 899/1494 cut-off events. For 5627/5637 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7459 event pairs, 310 based on Foata normal form. 12/1505 useless extension candidates. Maximal degree in co-relation 5613. Up to 1258 conditions per place. [2024-06-20 15:13:54,767 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 78 selfloop transitions, 19 changer transitions 0/104 dead transitions. [2024-06-20 15:13:54,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 809 flow [2024-06-20 15:13:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:54,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:13:54,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:13:54,768 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 465 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:13:54,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 809 flow [2024-06-20 15:13:54,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 773 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:54,776 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 523 flow [2024-06-20 15:13:54,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=523, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2024-06-20 15:13:54,777 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-20 15:13:54,777 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 523 flow [2024-06-20 15:13:54,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:54,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:54,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:54,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:13:54,778 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)] === [2024-06-20 15:13:54,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:54,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1813401496, now seen corresponding path program 3 times [2024-06-20 15:13:54,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:54,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731977450] [2024-06-20 15:13:54,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:54,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:54,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:54,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731977450] [2024-06-20 15:13:54,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731977450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:54,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:54,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:54,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717296681] [2024-06-20 15:13:54,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:54,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:54,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:54,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:54,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:54,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:54,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 523 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:54,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:54,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:54,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:55,160 INFO L124 PetriNetUnfolderBase]: 894/1485 cut-off events. [2024-06-20 15:13:55,160 INFO L125 PetriNetUnfolderBase]: For 6651/6657 co-relation queries the response was YES. [2024-06-20 15:13:55,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5743 conditions, 1485 events. 894/1485 cut-off events. For 6651/6657 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7351 event pairs, 323 based on Foata normal form. 8/1490 useless extension candidates. Maximal degree in co-relation 5712. Up to 1253 conditions per place. [2024-06-20 15:13:55,172 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 68 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2024-06-20 15:13:55,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 748 flow [2024-06-20 15:13:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 15:13:55,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-20 15:13:55,173 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 523 flow. Second operand 5 states and 127 transitions. [2024-06-20 15:13:55,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 748 flow [2024-06-20 15:13:55,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 694 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:55,192 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 513 flow [2024-06-20 15:13:55,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=513, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-06-20 15:13:55,193 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-20 15:13:55,193 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 513 flow [2024-06-20 15:13:55,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:55,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:55,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:55,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:13:55,194 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:55,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:55,194 INFO L85 PathProgramCache]: Analyzing trace with hash -646658297, now seen corresponding path program 1 times [2024-06-20 15:13:55,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:55,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849847019] [2024-06-20 15:13:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:55,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:55,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:55,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849847019] [2024-06-20 15:13:55,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849847019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:55,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:55,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:13:55,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919006407] [2024-06-20 15:13:55,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:55,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:13:55,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:55,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:13:55,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:13:55,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:55,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 513 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:55,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:55,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:55,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:55,497 INFO L124 PetriNetUnfolderBase]: 832/1381 cut-off events. [2024-06-20 15:13:55,497 INFO L125 PetriNetUnfolderBase]: For 7436/7438 co-relation queries the response was YES. [2024-06-20 15:13:55,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5517 conditions, 1381 events. 832/1381 cut-off events. For 7436/7438 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6895 event pairs, 278 based on Foata normal form. 3/1370 useless extension candidates. Maximal degree in co-relation 5485. Up to 1228 conditions per place. [2024-06-20 15:13:55,506 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 69 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2024-06-20 15:13:55,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 739 flow [2024-06-20 15:13:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:13:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:13:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-20 15:13:55,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 15:13:55,508 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 513 flow. Second operand 4 states and 98 transitions. [2024-06-20 15:13:55,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 739 flow [2024-06-20 15:13:55,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 701 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:55,516 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 565 flow [2024-06-20 15:13:55,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=565, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2024-06-20 15:13:55,517 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-20 15:13:55,517 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 565 flow [2024-06-20 15:13:55,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:13:55,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:55,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:55,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:13:55,518 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)] === [2024-06-20 15:13:55,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:55,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1363176749, now seen corresponding path program 1 times [2024-06-20 15:13:55,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:55,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404734492] [2024-06-20 15:13:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:55,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:55,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:55,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404734492] [2024-06-20 15:13:55,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404734492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:55,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:55,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:55,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829763028] [2024-06-20 15:13:55,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:55,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:55,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:55,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:55,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:55,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:55,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 565 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 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) [2024-06-20 15:13:55,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:55,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:55,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:55,885 INFO L124 PetriNetUnfolderBase]: 854/1423 cut-off events. [2024-06-20 15:13:55,885 INFO L125 PetriNetUnfolderBase]: For 9361/9373 co-relation queries the response was YES. [2024-06-20 15:13:55,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6021 conditions, 1423 events. 854/1423 cut-off events. For 9361/9373 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7210 event pairs, 180 based on Foata normal form. 14/1388 useless extension candidates. Maximal degree in co-relation 5987. Up to 1100 conditions per place. [2024-06-20 15:13:55,895 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 63 selfloop transitions, 32 changer transitions 0/111 dead transitions. [2024-06-20 15:13:55,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 111 transitions, 897 flow [2024-06-20 15:13:55,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:55,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:55,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 15:13:55,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-20 15:13:55,897 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 565 flow. Second operand 6 states and 154 transitions. [2024-06-20 15:13:55,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 111 transitions, 897 flow [2024-06-20 15:13:55,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 893 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 15:13:55,910 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 672 flow [2024-06-20 15:13:55,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=672, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-20 15:13:55,911 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-20 15:13:55,911 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 672 flow [2024-06-20 15:13:55,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 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) [2024-06-20 15:13:55,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:55,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:55,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:13:55,912 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)] === [2024-06-20 15:13:55,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:55,912 INFO L85 PathProgramCache]: Analyzing trace with hash -2089820353, now seen corresponding path program 2 times [2024-06-20 15:13:55,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:55,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168947486] [2024-06-20 15:13:55,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:55,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:56,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:56,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168947486] [2024-06-20 15:13:56,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168947486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:56,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:56,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:56,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141142443] [2024-06-20 15:13:56,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:56,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:56,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:56,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:56,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:56,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:56,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 672 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 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) [2024-06-20 15:13:56,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:56,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:56,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:56,291 INFO L124 PetriNetUnfolderBase]: 871/1450 cut-off events. [2024-06-20 15:13:56,292 INFO L125 PetriNetUnfolderBase]: For 11696/11715 co-relation queries the response was YES. [2024-06-20 15:13:56,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6500 conditions, 1450 events. 871/1450 cut-off events. For 11696/11715 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7359 event pairs, 252 based on Foata normal form. 12/1409 useless extension candidates. Maximal degree in co-relation 6463. Up to 1198 conditions per place. [2024-06-20 15:13:56,302 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 64 selfloop transitions, 30 changer transitions 0/110 dead transitions. [2024-06-20 15:13:56,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 110 transitions, 940 flow [2024-06-20 15:13:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:13:56,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-20 15:13:56,304 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 672 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:13:56,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 110 transitions, 940 flow [2024-06-20 15:13:56,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 110 transitions, 888 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:56,319 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 714 flow [2024-06-20 15:13:56,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=714, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-06-20 15:13:56,319 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-20 15:13:56,320 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 714 flow [2024-06-20 15:13:56,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 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) [2024-06-20 15:13:56,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:56,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:56,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:13:56,320 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)] === [2024-06-20 15:13:56,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:56,321 INFO L85 PathProgramCache]: Analyzing trace with hash 380867293, now seen corresponding path program 3 times [2024-06-20 15:13:56,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:56,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919520586] [2024-06-20 15:13:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:56,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:56,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:56,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919520586] [2024-06-20 15:13:56,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919520586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:56,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:56,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:13:56,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111411142] [2024-06-20 15:13:56,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:56,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:13:56,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:56,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:13:56,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:13:56,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:13:56,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 714 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 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) [2024-06-20 15:13:56,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:56,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:13:56,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:56,709 INFO L124 PetriNetUnfolderBase]: 859/1434 cut-off events. [2024-06-20 15:13:56,709 INFO L125 PetriNetUnfolderBase]: For 12730/12749 co-relation queries the response was YES. [2024-06-20 15:13:56,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6516 conditions, 1434 events. 859/1434 cut-off events. For 12730/12749 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7272 event pairs, 175 based on Foata normal form. 19/1403 useless extension candidates. Maximal degree in co-relation 6477. Up to 1161 conditions per place. [2024-06-20 15:13:56,718 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 63 selfloop transitions, 27 changer transitions 0/106 dead transitions. [2024-06-20 15:13:56,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 942 flow [2024-06-20 15:13:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:13:56,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:13:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 15:13:56,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 15:13:56,719 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 714 flow. Second operand 5 states and 130 transitions. [2024-06-20 15:13:56,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 942 flow [2024-06-20 15:13:56,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 868 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:56,734 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 706 flow [2024-06-20 15:13:56,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=706, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2024-06-20 15:13:56,735 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-20 15:13:56,735 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 706 flow [2024-06-20 15:13:56,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 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) [2024-06-20 15:13:56,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:56,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:56,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:13:56,736 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)] === [2024-06-20 15:13:56,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:56,736 INFO L85 PathProgramCache]: Analyzing trace with hash -361794759, now seen corresponding path program 1 times [2024-06-20 15:13:56,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:56,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327563045] [2024-06-20 15:13:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:56,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:56,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:56,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327563045] [2024-06-20 15:13:56,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327563045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:56,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:56,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:56,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800858561] [2024-06-20 15:13:56,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:56,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:56,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:56,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:56,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:56,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:56,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 706 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-20 15:13:56,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:56,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:56,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:57,180 INFO L124 PetriNetUnfolderBase]: 1027/1704 cut-off events. [2024-06-20 15:13:57,180 INFO L125 PetriNetUnfolderBase]: For 14624/14630 co-relation queries the response was YES. [2024-06-20 15:13:57,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7467 conditions, 1704 events. 1027/1704 cut-off events. For 14624/14630 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8780 event pairs, 220 based on Foata normal form. 18/1720 useless extension candidates. Maximal degree in co-relation 7427. Up to 1134 conditions per place. [2024-06-20 15:13:57,190 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 100 selfloop transitions, 26 changer transitions 0/133 dead transitions. [2024-06-20 15:13:57,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 133 transitions, 1174 flow [2024-06-20 15:13:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:13:57,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:13:57,192 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 706 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:13:57,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 133 transitions, 1174 flow [2024-06-20 15:13:57,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 1105 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:57,210 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 753 flow [2024-06-20 15:13:57,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=753, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2024-06-20 15:13:57,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-20 15:13:57,212 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 753 flow [2024-06-20 15:13:57,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-20 15:13:57,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:57,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:57,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:13:57,212 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:57,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:57,213 INFO L85 PathProgramCache]: Analyzing trace with hash 504326899, now seen corresponding path program 2 times [2024-06-20 15:13:57,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:57,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632997487] [2024-06-20 15:13:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:57,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:57,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:57,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632997487] [2024-06-20 15:13:57,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632997487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:57,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:57,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:57,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948789948] [2024-06-20 15:13:57,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:57,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:57,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:57,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:57,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:57,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:57,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 753 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-20 15:13:57,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:57,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:57,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:57,666 INFO L124 PetriNetUnfolderBase]: 1085/1812 cut-off events. [2024-06-20 15:13:57,667 INFO L125 PetriNetUnfolderBase]: For 17010/17016 co-relation queries the response was YES. [2024-06-20 15:13:57,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8057 conditions, 1812 events. 1085/1812 cut-off events. For 17010/17016 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9593 event pairs, 325 based on Foata normal form. 22/1832 useless extension candidates. Maximal degree in co-relation 8014. Up to 1466 conditions per place. [2024-06-20 15:13:57,678 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 95 selfloop transitions, 24 changer transitions 0/126 dead transitions. [2024-06-20 15:13:57,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 126 transitions, 1098 flow [2024-06-20 15:13:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:57,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:57,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:13:57,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:13:57,680 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 753 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:13:57,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 126 transitions, 1098 flow [2024-06-20 15:13:57,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 126 transitions, 1068 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 15:13:57,704 INFO L231 Difference]: Finished difference. Result has 95 places, 93 transitions, 789 flow [2024-06-20 15:13:57,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=789, PETRI_PLACES=95, PETRI_TRANSITIONS=93} [2024-06-20 15:13:57,705 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-20 15:13:57,706 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 93 transitions, 789 flow [2024-06-20 15:13:57,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-20 15:13:57,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:57,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:57,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:13:57,707 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:57,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:57,708 INFO L85 PathProgramCache]: Analyzing trace with hash -273228999, now seen corresponding path program 3 times [2024-06-20 15:13:57,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:57,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760136057] [2024-06-20 15:13:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:57,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:57,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:57,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760136057] [2024-06-20 15:13:57,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760136057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:57,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:57,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:57,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352536383] [2024-06-20 15:13:57,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:57,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:57,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:57,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:57,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:57,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:57,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 789 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-20 15:13:57,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:57,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:57,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:58,130 INFO L124 PetriNetUnfolderBase]: 1126/1883 cut-off events. [2024-06-20 15:13:58,130 INFO L125 PetriNetUnfolderBase]: For 18782/18788 co-relation queries the response was YES. [2024-06-20 15:13:58,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8549 conditions, 1883 events. 1126/1883 cut-off events. For 18782/18788 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10071 event pairs, 318 based on Foata normal form. 18/1899 useless extension candidates. Maximal degree in co-relation 8504. Up to 1450 conditions per place. [2024-06-20 15:13:58,142 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 99 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2024-06-20 15:13:58,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 132 transitions, 1174 flow [2024-06-20 15:13:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:13:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:13:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:13:58,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-20 15:13:58,144 INFO L175 Difference]: Start difference. First operand has 95 places, 93 transitions, 789 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:13:58,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 132 transitions, 1174 flow [2024-06-20 15:13:58,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 132 transitions, 1127 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:58,189 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 837 flow [2024-06-20 15:13:58,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=837, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2024-06-20 15:13:58,190 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-20 15:13:58,190 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 837 flow [2024-06-20 15:13:58,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-20 15:13:58,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:58,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:58,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:13:58,191 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:58,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:58,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1077867241, now seen corresponding path program 4 times [2024-06-20 15:13:58,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:58,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235447729] [2024-06-20 15:13:58,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:58,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:58,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:58,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235447729] [2024-06-20 15:13:58,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235447729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:58,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:58,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:58,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886800489] [2024-06-20 15:13:58,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:58,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:58,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:58,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:58,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:58,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:58,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 837 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-20 15:13:58,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:58,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:58,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:58,653 INFO L124 PetriNetUnfolderBase]: 1184/1991 cut-off events. [2024-06-20 15:13:58,653 INFO L125 PetriNetUnfolderBase]: For 21864/21870 co-relation queries the response was YES. [2024-06-20 15:13:58,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9128 conditions, 1991 events. 1184/1991 cut-off events. For 21864/21870 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10833 event pairs, 352 based on Foata normal form. 22/2011 useless extension candidates. Maximal degree in co-relation 9081. Up to 1653 conditions per place. [2024-06-20 15:13:58,666 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 100 selfloop transitions, 19 changer transitions 0/126 dead transitions. [2024-06-20 15:13:58,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 126 transitions, 1176 flow [2024-06-20 15:13:58,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:58,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:13:58,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:13:58,668 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 837 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:13:58,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 126 transitions, 1176 flow [2024-06-20 15:13:58,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 126 transitions, 1144 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 15:13:58,698 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 865 flow [2024-06-20 15:13:58,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=865, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2024-06-20 15:13:58,699 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-20 15:13:58,699 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 865 flow [2024-06-20 15:13:58,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-20 15:13:58,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:58,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:58,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:13:58,699 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:58,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:58,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1078015111, now seen corresponding path program 5 times [2024-06-20 15:13:58,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:58,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448212845] [2024-06-20 15:13:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:58,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:58,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448212845] [2024-06-20 15:13:58,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448212845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:58,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:58,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:58,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777987903] [2024-06-20 15:13:58,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:58,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:58,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:58,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:58,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:58,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:58,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 865 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-20 15:13:58,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:58,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:58,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:59,185 INFO L124 PetriNetUnfolderBase]: 1225/2062 cut-off events. [2024-06-20 15:13:59,185 INFO L125 PetriNetUnfolderBase]: For 23756/23762 co-relation queries the response was YES. [2024-06-20 15:13:59,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9608 conditions, 2062 events. 1225/2062 cut-off events. For 23756/23762 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11370 event pairs, 267 based on Foata normal form. 18/2078 useless extension candidates. Maximal degree in co-relation 9559. Up to 1479 conditions per place. [2024-06-20 15:13:59,201 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 104 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-20 15:13:59,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 1309 flow [2024-06-20 15:13:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:13:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:13:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:13:59,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-20 15:13:59,202 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 865 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:13:59,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 1309 flow [2024-06-20 15:13:59,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 133 transitions, 1268 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 15:13:59,235 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 906 flow [2024-06-20 15:13:59,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=906, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2024-06-20 15:13:59,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-20 15:13:59,236 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 906 flow [2024-06-20 15:13:59,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-20 15:13:59,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:59,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:59,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:13:59,237 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:59,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1072504861, now seen corresponding path program 6 times [2024-06-20 15:13:59,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:59,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453948900] [2024-06-20 15:13:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:59,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:59,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:59,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453948900] [2024-06-20 15:13:59,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453948900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:59,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:59,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:59,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471067274] [2024-06-20 15:13:59,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:59,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:59,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:59,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:59,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:59,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:59,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 906 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-20 15:13:59,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:59,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:59,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:13:59,724 INFO L124 PetriNetUnfolderBase]: 1197/2019 cut-off events. [2024-06-20 15:13:59,725 INFO L125 PetriNetUnfolderBase]: For 24237/24245 co-relation queries the response was YES. [2024-06-20 15:13:59,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9356 conditions, 2019 events. 1197/2019 cut-off events. For 24237/24245 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11080 event pairs, 338 based on Foata normal form. 24/2042 useless extension candidates. Maximal degree in co-relation 9305. Up to 1680 conditions per place. [2024-06-20 15:13:59,739 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 109 selfloop transitions, 21 changer transitions 0/137 dead transitions. [2024-06-20 15:13:59,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 137 transitions, 1292 flow [2024-06-20 15:13:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:13:59,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:13:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:13:59,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 15:13:59,741 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 906 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:13:59,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 137 transitions, 1292 flow [2024-06-20 15:13:59,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 137 transitions, 1204 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 15:13:59,770 INFO L231 Difference]: Finished difference. Result has 107 places, 100 transitions, 887 flow [2024-06-20 15:13:59,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=887, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2024-06-20 15:13:59,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-20 15:13:59,771 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 887 flow [2024-06-20 15:13:59,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-20 15:13:59,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:13:59,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:13:59,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:13:59,772 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:13:59,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:13:59,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1072289659, now seen corresponding path program 1 times [2024-06-20 15:13:59,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:13:59,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298336147] [2024-06-20 15:13:59,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:13:59,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:13:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:13:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:13:59,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:13:59,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298336147] [2024-06-20 15:13:59,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298336147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:13:59,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:13:59,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:13:59,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596148630] [2024-06-20 15:13:59,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:13:59,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:13:59,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:13:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:13:59,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:13:59,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:13:59,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 887 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-20 15:13:59,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:13:59,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:13:59,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:00,301 INFO L124 PetriNetUnfolderBase]: 1177/1987 cut-off events. [2024-06-20 15:14:00,302 INFO L125 PetriNetUnfolderBase]: For 22683/22691 co-relation queries the response was YES. [2024-06-20 15:14:00,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8887 conditions, 1987 events. 1177/1987 cut-off events. For 22683/22691 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10866 event pairs, 285 based on Foata normal form. 20/2006 useless extension candidates. Maximal degree in co-relation 8836. Up to 1441 conditions per place. [2024-06-20 15:14:00,317 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 108 selfloop transitions, 25 changer transitions 0/140 dead transitions. [2024-06-20 15:14:00,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 140 transitions, 1237 flow [2024-06-20 15:14:00,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:14:00,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-20 15:14:00,319 INFO L175 Difference]: Start difference. First operand has 107 places, 100 transitions, 887 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:14:00,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 140 transitions, 1237 flow [2024-06-20 15:14:00,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 140 transitions, 1196 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:00,350 INFO L231 Difference]: Finished difference. Result has 108 places, 99 transitions, 860 flow [2024-06-20 15:14:00,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=108, PETRI_TRANSITIONS=99} [2024-06-20 15:14:00,350 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-20 15:14:00,350 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 99 transitions, 860 flow [2024-06-20 15:14:00,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-20 15:14:00,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:00,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:00,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:14:00,351 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)] === [2024-06-20 15:14:00,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:00,352 INFO L85 PathProgramCache]: Analyzing trace with hash 819392194, now seen corresponding path program 1 times [2024-06-20 15:14:00,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:00,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570860585] [2024-06-20 15:14:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:00,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:00,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:00,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570860585] [2024-06-20 15:14:00,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570860585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:00,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:00,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:00,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685711043] [2024-06-20 15:14:00,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:00,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:00,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:00,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:00,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:00,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:00,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 99 transitions, 860 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:00,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:00,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:00,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:00,752 INFO L124 PetriNetUnfolderBase]: 1127/1917 cut-off events. [2024-06-20 15:14:00,753 INFO L125 PetriNetUnfolderBase]: For 22664/22667 co-relation queries the response was YES. [2024-06-20 15:14:00,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8743 conditions, 1917 events. 1127/1917 cut-off events. For 22664/22667 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10535 event pairs, 308 based on Foata normal form. 5/1906 useless extension candidates. Maximal degree in co-relation 8691. Up to 1703 conditions per place. [2024-06-20 15:14:00,768 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 78 selfloop transitions, 19 changer transitions 0/110 dead transitions. [2024-06-20 15:14:00,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 110 transitions, 1096 flow [2024-06-20 15:14:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:14:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:14:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-20 15:14:00,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 15:14:00,770 INFO L175 Difference]: Start difference. First operand has 108 places, 99 transitions, 860 flow. Second operand 4 states and 99 transitions. [2024-06-20 15:14:00,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 110 transitions, 1096 flow [2024-06-20 15:14:00,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 110 transitions, 1026 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:00,812 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 868 flow [2024-06-20 15:14:00,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=868, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2024-06-20 15:14:00,813 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-20 15:14:00,813 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 868 flow [2024-06-20 15:14:00,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:00,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:00,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:00,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:14:00,814 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)] === [2024-06-20 15:14:00,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:00,814 INFO L85 PathProgramCache]: Analyzing trace with hash -807621564, now seen corresponding path program 2 times [2024-06-20 15:14:00,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:00,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104026035] [2024-06-20 15:14:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:00,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:00,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104026035] [2024-06-20 15:14:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104026035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:00,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:00,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:00,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744598172] [2024-06-20 15:14:00,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:00,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:00,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:00,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:00,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:01,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:01,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 868 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:01,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:01,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:01,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:01,180 INFO L124 PetriNetUnfolderBase]: 1121/1909 cut-off events. [2024-06-20 15:14:01,181 INFO L125 PetriNetUnfolderBase]: For 23506/23509 co-relation queries the response was YES. [2024-06-20 15:14:01,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8694 conditions, 1909 events. 1121/1909 cut-off events. For 23506/23509 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10518 event pairs, 308 based on Foata normal form. 5/1898 useless extension candidates. Maximal degree in co-relation 8642. Up to 1690 conditions per place. [2024-06-20 15:14:01,194 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 79 selfloop transitions, 22 changer transitions 0/114 dead transitions. [2024-06-20 15:14:01,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 114 transitions, 1120 flow [2024-06-20 15:14:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:01,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-20 15:14:01,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-20 15:14:01,195 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 868 flow. Second operand 5 states and 118 transitions. [2024-06-20 15:14:01,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 114 transitions, 1120 flow [2024-06-20 15:14:01,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 114 transitions, 1070 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:01,230 INFO L231 Difference]: Finished difference. Result has 108 places, 105 transitions, 902 flow [2024-06-20 15:14:01,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=902, PETRI_PLACES=108, PETRI_TRANSITIONS=105} [2024-06-20 15:14:01,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-20 15:14:01,231 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 105 transitions, 902 flow [2024-06-20 15:14:01,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:01,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:01,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:01,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:14:01,231 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)] === [2024-06-20 15:14:01,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:01,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1154175532, now seen corresponding path program 1 times [2024-06-20 15:14:01,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:01,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380967299] [2024-06-20 15:14:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:01,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:01,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:01,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380967299] [2024-06-20 15:14:01,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380967299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:01,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:01,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:01,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419376302] [2024-06-20 15:14:01,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:01,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:01,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:01,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:01,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:01,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:01,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 105 transitions, 902 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:01,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:01,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:01,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:01,563 INFO L124 PetriNetUnfolderBase]: 1109/1923 cut-off events. [2024-06-20 15:14:01,564 INFO L125 PetriNetUnfolderBase]: For 23992/23994 co-relation queries the response was YES. [2024-06-20 15:14:01,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8831 conditions, 1923 events. 1109/1923 cut-off events. For 23992/23994 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10768 event pairs, 306 based on Foata normal form. 4/1925 useless extension candidates. Maximal degree in co-relation 8778. Up to 1700 conditions per place. [2024-06-20 15:14:01,577 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 92 selfloop transitions, 22 changer transitions 0/124 dead transitions. [2024-06-20 15:14:01,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 124 transitions, 1266 flow [2024-06-20 15:14:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:01,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-20 15:14:01,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-20 15:14:01,578 INFO L175 Difference]: Start difference. First operand has 108 places, 105 transitions, 902 flow. Second operand 5 states and 122 transitions. [2024-06-20 15:14:01,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 124 transitions, 1266 flow [2024-06-20 15:14:01,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 124 transitions, 1208 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:01,619 INFO L231 Difference]: Finished difference. Result has 110 places, 111 transitions, 960 flow [2024-06-20 15:14:01,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=960, PETRI_PLACES=110, PETRI_TRANSITIONS=111} [2024-06-20 15:14:01,619 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-20 15:14:01,619 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 111 transitions, 960 flow [2024-06-20 15:14:01,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:01,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:01,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:01,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:14:01,620 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)] === [2024-06-20 15:14:01,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:01,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1025374060, now seen corresponding path program 2 times [2024-06-20 15:14:01,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:01,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109404016] [2024-06-20 15:14:01,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:01,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:01,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:01,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109404016] [2024-06-20 15:14:01,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109404016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:01,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:01,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:01,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389096904] [2024-06-20 15:14:01,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:01,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:01,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:01,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:01,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:01,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:01,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 111 transitions, 960 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:01,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:01,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:01,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:02,024 INFO L124 PetriNetUnfolderBase]: 1104/1916 cut-off events. [2024-06-20 15:14:02,024 INFO L125 PetriNetUnfolderBase]: For 25924/25926 co-relation queries the response was YES. [2024-06-20 15:14:02,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9032 conditions, 1916 events. 1104/1916 cut-off events. For 25924/25926 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10727 event pairs, 306 based on Foata normal form. 4/1918 useless extension candidates. Maximal degree in co-relation 8978. Up to 1701 conditions per place. [2024-06-20 15:14:02,036 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 93 selfloop transitions, 19 changer transitions 0/122 dead transitions. [2024-06-20 15:14:02,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 122 transitions, 1212 flow [2024-06-20 15:14:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:14:02,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:14:02,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-20 15:14:02,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 15:14:02,037 INFO L175 Difference]: Start difference. First operand has 110 places, 111 transitions, 960 flow. Second operand 4 states and 102 transitions. [2024-06-20 15:14:02,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 122 transitions, 1212 flow [2024-06-20 15:14:02,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 122 transitions, 1157 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-20 15:14:02,079 INFO L231 Difference]: Finished difference. Result has 113 places, 111 transitions, 955 flow [2024-06-20 15:14:02,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=955, PETRI_PLACES=113, PETRI_TRANSITIONS=111} [2024-06-20 15:14:02,079 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-20 15:14:02,079 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 111 transitions, 955 flow [2024-06-20 15:14:02,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:02,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:02,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:02,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:14:02,080 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)] === [2024-06-20 15:14:02,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:02,081 INFO L85 PathProgramCache]: Analyzing trace with hash -807606684, now seen corresponding path program 1 times [2024-06-20 15:14:02,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:02,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236153756] [2024-06-20 15:14:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:02,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:02,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:02,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236153756] [2024-06-20 15:14:02,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236153756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:02,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:02,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:14:02,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160761073] [2024-06-20 15:14:02,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:02,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:14:02,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:02,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:14:02,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:14:02,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:02,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 111 transitions, 955 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:02,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:02,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:02,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:02,441 INFO L124 PetriNetUnfolderBase]: 1111/1911 cut-off events. [2024-06-20 15:14:02,441 INFO L125 PetriNetUnfolderBase]: For 27513/27518 co-relation queries the response was YES. [2024-06-20 15:14:02,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8990 conditions, 1911 events. 1111/1911 cut-off events. For 27513/27518 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10598 event pairs, 292 based on Foata normal form. 7/1904 useless extension candidates. Maximal degree in co-relation 8934. Up to 1704 conditions per place. [2024-06-20 15:14:02,457 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 100 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2024-06-20 15:14:02,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 124 transitions, 1222 flow [2024-06-20 15:14:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-20 15:14:02,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-20 15:14:02,458 INFO L175 Difference]: Start difference. First operand has 113 places, 111 transitions, 955 flow. Second operand 5 states and 116 transitions. [2024-06-20 15:14:02,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 124 transitions, 1222 flow [2024-06-20 15:14:02,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 124 transitions, 1184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:02,499 INFO L231 Difference]: Finished difference. Result has 115 places, 113 transitions, 964 flow [2024-06-20 15:14:02,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=964, PETRI_PLACES=115, PETRI_TRANSITIONS=113} [2024-06-20 15:14:02,500 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-06-20 15:14:02,500 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 113 transitions, 964 flow [2024-06-20 15:14:02,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:02,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:02,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:02,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:14:02,501 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)] === [2024-06-20 15:14:02,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:02,501 INFO L85 PathProgramCache]: Analyzing trace with hash 212333482, now seen corresponding path program 1 times [2024-06-20 15:14:02,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:02,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787116801] [2024-06-20 15:14:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:02,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:02,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:02,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787116801] [2024-06-20 15:14:02,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787116801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:02,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:02,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:02,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928852822] [2024-06-20 15:14:02,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:02,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:02,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:02,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:02,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:02,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:02,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 113 transitions, 964 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:02,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:02,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:02,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:02,923 INFO L124 PetriNetUnfolderBase]: 1193/2031 cut-off events. [2024-06-20 15:14:02,923 INFO L125 PetriNetUnfolderBase]: For 28911/28917 co-relation queries the response was YES. [2024-06-20 15:14:02,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9645 conditions, 2031 events. 1193/2031 cut-off events. For 28911/28917 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11247 event pairs, 308 based on Foata normal form. 7/2037 useless extension candidates. Maximal degree in co-relation 9588. Up to 1807 conditions per place. [2024-06-20 15:14:02,937 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 116 selfloop transitions, 26 changer transitions 0/149 dead transitions. [2024-06-20 15:14:02,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 149 transitions, 1473 flow [2024-06-20 15:14:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:02,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-20 15:14:02,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:14:02,939 INFO L175 Difference]: Start difference. First operand has 115 places, 113 transitions, 964 flow. Second operand 8 states and 176 transitions. [2024-06-20 15:14:02,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 149 transitions, 1473 flow [2024-06-20 15:14:02,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 149 transitions, 1437 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:02,976 INFO L231 Difference]: Finished difference. Result has 122 places, 128 transitions, 1136 flow [2024-06-20 15:14:02,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1136, PETRI_PLACES=122, PETRI_TRANSITIONS=128} [2024-06-20 15:14:02,977 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-20 15:14:02,977 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 128 transitions, 1136 flow [2024-06-20 15:14:02,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:02,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:02,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:02,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:14:02,978 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)] === [2024-06-20 15:14:02,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:02,978 INFO L85 PathProgramCache]: Analyzing trace with hash -326650804, now seen corresponding path program 2 times [2024-06-20 15:14:02,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:02,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178085332] [2024-06-20 15:14:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:02,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:03,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:03,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178085332] [2024-06-20 15:14:03,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178085332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:03,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:03,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:03,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795962028] [2024-06-20 15:14:03,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:03,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:03,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:03,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:03,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:03,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:03,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 128 transitions, 1136 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:03,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:03,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:03,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:03,407 INFO L124 PetriNetUnfolderBase]: 1198/2040 cut-off events. [2024-06-20 15:14:03,407 INFO L125 PetriNetUnfolderBase]: For 31674/31682 co-relation queries the response was YES. [2024-06-20 15:14:03,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10018 conditions, 2040 events. 1198/2040 cut-off events. For 31674/31682 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11317 event pairs, 308 based on Foata normal form. 9/2048 useless extension candidates. Maximal degree in co-relation 9958. Up to 1813 conditions per place. [2024-06-20 15:14:03,419 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 116 selfloop transitions, 28 changer transitions 0/151 dead transitions. [2024-06-20 15:14:03,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 151 transitions, 1556 flow [2024-06-20 15:14:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:03,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-20 15:14:03,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-20 15:14:03,420 INFO L175 Difference]: Start difference. First operand has 122 places, 128 transitions, 1136 flow. Second operand 7 states and 158 transitions. [2024-06-20 15:14:03,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 151 transitions, 1556 flow [2024-06-20 15:14:03,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 151 transitions, 1492 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:03,458 INFO L231 Difference]: Finished difference. Result has 126 places, 131 transitions, 1164 flow [2024-06-20 15:14:03,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1164, PETRI_PLACES=126, PETRI_TRANSITIONS=131} [2024-06-20 15:14:03,459 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-20 15:14:03,459 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 131 transitions, 1164 flow [2024-06-20 15:14:03,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:03,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:03,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:03,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:14:03,460 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)] === [2024-06-20 15:14:03,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:03,460 INFO L85 PathProgramCache]: Analyzing trace with hash -326639644, now seen corresponding path program 3 times [2024-06-20 15:14:03,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:03,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988196183] [2024-06-20 15:14:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:03,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:03,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:03,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988196183] [2024-06-20 15:14:03,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988196183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:03,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:03,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:03,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057413359] [2024-06-20 15:14:03,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:03,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:03,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:03,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:03,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:03,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:03,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 131 transitions, 1164 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:03,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:03,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:03,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:03,851 INFO L124 PetriNetUnfolderBase]: 1195/2033 cut-off events. [2024-06-20 15:14:03,851 INFO L125 PetriNetUnfolderBase]: For 33476/33480 co-relation queries the response was YES. [2024-06-20 15:14:03,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10017 conditions, 2033 events. 1195/2033 cut-off events. For 33476/33480 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11237 event pairs, 317 based on Foata normal form. 2/2033 useless extension candidates. Maximal degree in co-relation 9956. Up to 1810 conditions per place. [2024-06-20 15:14:03,866 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 109 selfloop transitions, 26 changer transitions 0/142 dead transitions. [2024-06-20 15:14:03,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 142 transitions, 1466 flow [2024-06-20 15:14:03,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-20 15:14:03,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-20 15:14:03,867 INFO L175 Difference]: Start difference. First operand has 126 places, 131 transitions, 1164 flow. Second operand 5 states and 116 transitions. [2024-06-20 15:14:03,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 142 transitions, 1466 flow [2024-06-20 15:14:03,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 142 transitions, 1400 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:03,922 INFO L231 Difference]: Finished difference. Result has 126 places, 131 transitions, 1156 flow [2024-06-20 15:14:03,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1156, PETRI_PLACES=126, PETRI_TRANSITIONS=131} [2024-06-20 15:14:03,923 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-20 15:14:03,923 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 131 transitions, 1156 flow [2024-06-20 15:14:03,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:03,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:03,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:03,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:14:03,924 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)] === [2024-06-20 15:14:03,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:03,924 INFO L85 PathProgramCache]: Analyzing trace with hash 733536100, now seen corresponding path program 4 times [2024-06-20 15:14:03,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:03,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112734465] [2024-06-20 15:14:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:03,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:04,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:04,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112734465] [2024-06-20 15:14:04,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112734465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:04,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:04,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:04,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530691291] [2024-06-20 15:14:04,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:04,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:04,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:04,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:04,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:04,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:04,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 131 transitions, 1156 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:04,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:04,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:04,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:04,327 INFO L124 PetriNetUnfolderBase]: 1192/2016 cut-off events. [2024-06-20 15:14:04,328 INFO L125 PetriNetUnfolderBase]: For 32881/32885 co-relation queries the response was YES. [2024-06-20 15:14:04,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9940 conditions, 2016 events. 1192/2016 cut-off events. For 32881/32885 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11036 event pairs, 317 based on Foata normal form. 2/2016 useless extension candidates. Maximal degree in co-relation 9879. Up to 1800 conditions per place. [2024-06-20 15:14:04,343 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 111 selfloop transitions, 31 changer transitions 0/149 dead transitions. [2024-06-20 15:14:04,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 149 transitions, 1512 flow [2024-06-20 15:14:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-20 15:14:04,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-20 15:14:04,344 INFO L175 Difference]: Start difference. First operand has 126 places, 131 transitions, 1156 flow. Second operand 6 states and 134 transitions. [2024-06-20 15:14:04,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 149 transitions, 1512 flow [2024-06-20 15:14:04,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 149 transitions, 1460 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:04,396 INFO L231 Difference]: Finished difference. Result has 129 places, 137 transitions, 1224 flow [2024-06-20 15:14:04,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1224, PETRI_PLACES=129, PETRI_TRANSITIONS=137} [2024-06-20 15:14:04,397 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-20 15:14:04,397 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 137 transitions, 1224 flow [2024-06-20 15:14:04,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:04,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:04,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:04,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:14:04,398 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)] === [2024-06-20 15:14:04,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:04,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1419704304, now seen corresponding path program 1 times [2024-06-20 15:14:04,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:04,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182527668] [2024-06-20 15:14:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:04,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:04,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:04,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182527668] [2024-06-20 15:14:04,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182527668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:04,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:04,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:04,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060563619] [2024-06-20 15:14:04,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:04,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:04,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:04,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:04,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:04,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:04,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 137 transitions, 1224 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:04,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:04,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:04,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:04,790 INFO L124 PetriNetUnfolderBase]: 1197/2027 cut-off events. [2024-06-20 15:14:04,791 INFO L125 PetriNetUnfolderBase]: For 34929/34931 co-relation queries the response was YES. [2024-06-20 15:14:04,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10268 conditions, 2027 events. 1197/2027 cut-off events. For 34929/34931 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11114 event pairs, 306 based on Foata normal form. 3/2029 useless extension candidates. Maximal degree in co-relation 10205. Up to 1823 conditions per place. [2024-06-20 15:14:04,804 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 139 selfloop transitions, 21 changer transitions 0/167 dead transitions. [2024-06-20 15:14:04,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 167 transitions, 1750 flow [2024-06-20 15:14:04,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:04,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:04,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 15:14:04,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:14:04,806 INFO L175 Difference]: Start difference. First operand has 129 places, 137 transitions, 1224 flow. Second operand 6 states and 138 transitions. [2024-06-20 15:14:04,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 167 transitions, 1750 flow [2024-06-20 15:14:04,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 167 transitions, 1697 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:04,861 INFO L231 Difference]: Finished difference. Result has 135 places, 149 transitions, 1342 flow [2024-06-20 15:14:04,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1342, PETRI_PLACES=135, PETRI_TRANSITIONS=149} [2024-06-20 15:14:04,862 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-20 15:14:04,862 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 149 transitions, 1342 flow [2024-06-20 15:14:04,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:04,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:04,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:04,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:14:04,863 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)] === [2024-06-20 15:14:04,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:04,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1721831548, now seen corresponding path program 2 times [2024-06-20 15:14:04,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:04,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704993188] [2024-06-20 15:14:04,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:04,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:05,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:05,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704993188] [2024-06-20 15:14:05,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704993188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:05,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:05,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:05,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381211008] [2024-06-20 15:14:05,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:05,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:05,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:05,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:05,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:05,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:05,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 149 transitions, 1342 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:05,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:05,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:05,359 INFO L124 PetriNetUnfolderBase]: 1202/2036 cut-off events. [2024-06-20 15:14:05,359 INFO L125 PetriNetUnfolderBase]: For 37822/37826 co-relation queries the response was YES. [2024-06-20 15:14:05,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10696 conditions, 2036 events. 1202/2036 cut-off events. For 37822/37826 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11208 event pairs, 304 based on Foata normal form. 5/2040 useless extension candidates. Maximal degree in co-relation 10629. Up to 1835 conditions per place. [2024-06-20 15:14:05,374 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 143 selfloop transitions, 22 changer transitions 0/172 dead transitions. [2024-06-20 15:14:05,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 172 transitions, 1830 flow [2024-06-20 15:14:05,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-20 15:14:05,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-20 15:14:05,376 INFO L175 Difference]: Start difference. First operand has 135 places, 149 transitions, 1342 flow. Second operand 7 states and 155 transitions. [2024-06-20 15:14:05,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 172 transitions, 1830 flow [2024-06-20 15:14:05,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 172 transitions, 1778 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:05,429 INFO L231 Difference]: Finished difference. Result has 141 places, 154 transitions, 1396 flow [2024-06-20 15:14:05,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1396, PETRI_PLACES=141, PETRI_TRANSITIONS=154} [2024-06-20 15:14:05,431 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-20 15:14:05,431 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 154 transitions, 1396 flow [2024-06-20 15:14:05,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:05,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:05,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:14:05,432 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)] === [2024-06-20 15:14:05,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:05,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1721825968, now seen corresponding path program 3 times [2024-06-20 15:14:05,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:05,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938425362] [2024-06-20 15:14:05,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:05,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:05,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:05,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938425362] [2024-06-20 15:14:05,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938425362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:05,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:05,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:05,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32156135] [2024-06-20 15:14:05,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:05,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:05,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:05,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:05,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:05,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:05,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 154 transitions, 1396 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:05,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:05,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:05,911 INFO L124 PetriNetUnfolderBase]: 1199/2032 cut-off events. [2024-06-20 15:14:05,911 INFO L125 PetriNetUnfolderBase]: For 39693/39697 co-relation queries the response was YES. [2024-06-20 15:14:05,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10707 conditions, 2032 events. 1199/2032 cut-off events. For 39693/39697 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11172 event pairs, 306 based on Foata normal form. 5/2036 useless extension candidates. Maximal degree in co-relation 10638. Up to 1832 conditions per place. [2024-06-20 15:14:05,927 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 142 selfloop transitions, 20 changer transitions 0/169 dead transitions. [2024-06-20 15:14:05,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 169 transitions, 1767 flow [2024-06-20 15:14:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-20 15:14:05,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-20 15:14:05,929 INFO L175 Difference]: Start difference. First operand has 141 places, 154 transitions, 1396 flow. Second operand 5 states and 119 transitions. [2024-06-20 15:14:05,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 169 transitions, 1767 flow [2024-06-20 15:14:05,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 169 transitions, 1695 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:05,994 INFO L231 Difference]: Finished difference. Result has 142 places, 154 transitions, 1370 flow [2024-06-20 15:14:05,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1370, PETRI_PLACES=142, PETRI_TRANSITIONS=154} [2024-06-20 15:14:05,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-20 15:14:05,995 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 154 transitions, 1370 flow [2024-06-20 15:14:05,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:05,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:05,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:05,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:14:05,995 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)] === [2024-06-20 15:14:05,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:05,996 INFO L85 PathProgramCache]: Analyzing trace with hash 865299045, now seen corresponding path program 1 times [2024-06-20 15:14:05,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:05,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597112816] [2024-06-20 15:14:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:05,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:06,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:06,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597112816] [2024-06-20 15:14:06,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597112816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:06,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:06,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:06,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648037375] [2024-06-20 15:14:06,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:06,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:06,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:06,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:06,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:06,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 154 transitions, 1370 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:06,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:06,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:06,496 INFO L124 PetriNetUnfolderBase]: 1165/1985 cut-off events. [2024-06-20 15:14:06,496 INFO L125 PetriNetUnfolderBase]: For 43624/43629 co-relation queries the response was YES. [2024-06-20 15:14:06,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10548 conditions, 1985 events. 1165/1985 cut-off events. For 43624/43629 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11019 event pairs, 302 based on Foata normal form. 9/1978 useless extension candidates. Maximal degree in co-relation 10478. Up to 1713 conditions per place. [2024-06-20 15:14:06,509 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 119 selfloop transitions, 27 changer transitions 0/166 dead transitions. [2024-06-20 15:14:06,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 166 transitions, 1714 flow [2024-06-20 15:14:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-20 15:14:06,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-20 15:14:06,510 INFO L175 Difference]: Start difference. First operand has 142 places, 154 transitions, 1370 flow. Second operand 5 states and 119 transitions. [2024-06-20 15:14:06,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 166 transitions, 1714 flow [2024-06-20 15:14:06,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 166 transitions, 1674 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:06,579 INFO L231 Difference]: Finished difference. Result has 143 places, 156 transitions, 1426 flow [2024-06-20 15:14:06,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1426, PETRI_PLACES=143, PETRI_TRANSITIONS=156} [2024-06-20 15:14:06,580 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-20 15:14:06,580 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 156 transitions, 1426 flow [2024-06-20 15:14:06,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:06,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:06,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:14:06,581 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)] === [2024-06-20 15:14:06,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:06,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1264796355, now seen corresponding path program 2 times [2024-06-20 15:14:06,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:06,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452719299] [2024-06-20 15:14:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:06,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:06,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:06,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452719299] [2024-06-20 15:14:06,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452719299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:06,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:06,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:06,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140471700] [2024-06-20 15:14:06,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:06,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:06,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:06,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:06,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:06,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:06,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 156 transitions, 1426 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:06,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:06,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:06,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:07,018 INFO L124 PetriNetUnfolderBase]: 1177/2005 cut-off events. [2024-06-20 15:14:07,019 INFO L125 PetriNetUnfolderBase]: For 46673/46678 co-relation queries the response was YES. [2024-06-20 15:14:07,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10879 conditions, 2005 events. 1177/2005 cut-off events. For 46673/46678 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11120 event pairs, 306 based on Foata normal form. 9/1998 useless extension candidates. Maximal degree in co-relation 10808. Up to 1739 conditions per place. [2024-06-20 15:14:07,037 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 119 selfloop transitions, 30 changer transitions 0/169 dead transitions. [2024-06-20 15:14:07,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 169 transitions, 1782 flow [2024-06-20 15:14:07,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-20 15:14:07,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-20 15:14:07,038 INFO L175 Difference]: Start difference. First operand has 143 places, 156 transitions, 1426 flow. Second operand 6 states and 137 transitions. [2024-06-20 15:14:07,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 169 transitions, 1782 flow [2024-06-20 15:14:07,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 169 transitions, 1714 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:07,119 INFO L231 Difference]: Finished difference. Result has 146 places, 158 transitions, 1460 flow [2024-06-20 15:14:07,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1460, PETRI_PLACES=146, PETRI_TRANSITIONS=158} [2024-06-20 15:14:07,119 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-20 15:14:07,119 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 158 transitions, 1460 flow [2024-06-20 15:14:07,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:07,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:07,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:07,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:14:07,120 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)] === [2024-06-20 15:14:07,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1279081155, now seen corresponding path program 3 times [2024-06-20 15:14:07,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:07,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362564978] [2024-06-20 15:14:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:07,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:07,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:07,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362564978] [2024-06-20 15:14:07,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362564978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:07,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:07,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:07,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020728666] [2024-06-20 15:14:07,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:07,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:07,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:07,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:07,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:07,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:07,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 158 transitions, 1460 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:07,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:07,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:07,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:07,546 INFO L124 PetriNetUnfolderBase]: 1167/1991 cut-off events. [2024-06-20 15:14:07,546 INFO L125 PetriNetUnfolderBase]: For 47210/47215 co-relation queries the response was YES. [2024-06-20 15:14:07,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10774 conditions, 1991 events. 1167/1991 cut-off events. For 47210/47215 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11058 event pairs, 300 based on Foata normal form. 9/1984 useless extension candidates. Maximal degree in co-relation 10702. Up to 1687 conditions per place. [2024-06-20 15:14:07,562 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 118 selfloop transitions, 34 changer transitions 0/172 dead transitions. [2024-06-20 15:14:07,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 172 transitions, 1828 flow [2024-06-20 15:14:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:07,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 15:14:07,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:14:07,564 INFO L175 Difference]: Start difference. First operand has 146 places, 158 transitions, 1460 flow. Second operand 6 states and 138 transitions. [2024-06-20 15:14:07,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 172 transitions, 1828 flow [2024-06-20 15:14:07,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 172 transitions, 1744 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:07,645 INFO L231 Difference]: Finished difference. Result has 148 places, 160 transitions, 1489 flow [2024-06-20 15:14:07,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1489, PETRI_PLACES=148, PETRI_TRANSITIONS=160} [2024-06-20 15:14:07,646 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-20 15:14:07,646 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 160 transitions, 1489 flow [2024-06-20 15:14:07,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:07,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:07,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:07,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:14:07,647 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)] === [2024-06-20 15:14:07,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:07,647 INFO L85 PathProgramCache]: Analyzing trace with hash -436841749, now seen corresponding path program 1 times [2024-06-20 15:14:07,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:07,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732698100] [2024-06-20 15:14:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:07,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:07,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:07,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732698100] [2024-06-20 15:14:07,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732698100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:07,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:07,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:07,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139289588] [2024-06-20 15:14:07,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:07,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:07,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:07,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:07,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:07,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:07,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 160 transitions, 1489 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:07,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:07,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:07,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:08,084 INFO L124 PetriNetUnfolderBase]: 1178/2011 cut-off events. [2024-06-20 15:14:08,084 INFO L125 PetriNetUnfolderBase]: For 50406/50410 co-relation queries the response was YES. [2024-06-20 15:14:08,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11025 conditions, 2011 events. 1178/2011 cut-off events. For 50406/50410 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11216 event pairs, 261 based on Foata normal form. 8/2011 useless extension candidates. Maximal degree in co-relation 10952. Up to 1686 conditions per place. [2024-06-20 15:14:08,101 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 134 selfloop transitions, 32 changer transitions 0/183 dead transitions. [2024-06-20 15:14:08,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 183 transitions, 2003 flow [2024-06-20 15:14:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 15:14:08,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-20 15:14:08,103 INFO L175 Difference]: Start difference. First operand has 148 places, 160 transitions, 1489 flow. Second operand 6 states and 145 transitions. [2024-06-20 15:14:08,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 183 transitions, 2003 flow [2024-06-20 15:14:08,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 183 transitions, 1906 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:08,175 INFO L231 Difference]: Finished difference. Result has 150 places, 164 transitions, 1533 flow [2024-06-20 15:14:08,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1533, PETRI_PLACES=150, PETRI_TRANSITIONS=164} [2024-06-20 15:14:08,176 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-20 15:14:08,176 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 164 transitions, 1533 flow [2024-06-20 15:14:08,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:08,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:08,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:14:08,177 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)] === [2024-06-20 15:14:08,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:08,177 INFO L85 PathProgramCache]: Analyzing trace with hash -436781299, now seen corresponding path program 2 times [2024-06-20 15:14:08,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:08,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87724330] [2024-06-20 15:14:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:08,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:08,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:08,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87724330] [2024-06-20 15:14:08,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87724330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:08,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:08,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:08,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707227227] [2024-06-20 15:14:08,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:08,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:08,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:08,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:08,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:08,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:08,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 164 transitions, 1533 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:08,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:08,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:08,596 INFO L124 PetriNetUnfolderBase]: 1192/2033 cut-off events. [2024-06-20 15:14:08,596 INFO L125 PetriNetUnfolderBase]: For 53248/53252 co-relation queries the response was YES. [2024-06-20 15:14:08,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11229 conditions, 2033 events. 1192/2033 cut-off events. For 53248/53252 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11352 event pairs, 298 based on Foata normal form. 8/2033 useless extension candidates. Maximal degree in co-relation 11155. Up to 1768 conditions per place. [2024-06-20 15:14:08,613 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 133 selfloop transitions, 30 changer transitions 0/180 dead transitions. [2024-06-20 15:14:08,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 180 transitions, 1931 flow [2024-06-20 15:14:08,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 15:14:08,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:14:08,615 INFO L175 Difference]: Start difference. First operand has 150 places, 164 transitions, 1533 flow. Second operand 6 states and 140 transitions. [2024-06-20 15:14:08,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 180 transitions, 1931 flow [2024-06-20 15:14:08,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 180 transitions, 1855 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:08,708 INFO L231 Difference]: Finished difference. Result has 154 places, 166 transitions, 1565 flow [2024-06-20 15:14:08,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1565, PETRI_PLACES=154, PETRI_TRANSITIONS=166} [2024-06-20 15:14:08,708 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-20 15:14:08,708 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 166 transitions, 1565 flow [2024-06-20 15:14:08,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:08,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:08,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:14:08,709 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)] === [2024-06-20 15:14:08,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:08,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1836993707, now seen corresponding path program 3 times [2024-06-20 15:14:08,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:08,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777024619] [2024-06-20 15:14:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:08,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:08,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:08,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777024619] [2024-06-20 15:14:08,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777024619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:08,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:08,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:14:08,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566905489] [2024-06-20 15:14:08,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:08,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:14:08,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:08,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:14:08,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:14:08,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 15:14:08,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 166 transitions, 1565 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:08,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:08,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 15:14:08,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:09,143 INFO L124 PetriNetUnfolderBase]: 1182/2019 cut-off events. [2024-06-20 15:14:09,143 INFO L125 PetriNetUnfolderBase]: For 53369/53373 co-relation queries the response was YES. [2024-06-20 15:14:09,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11043 conditions, 2019 events. 1182/2019 cut-off events. For 53369/53373 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11294 event pairs, 259 based on Foata normal form. 8/2019 useless extension candidates. Maximal degree in co-relation 10967. Up to 1726 conditions per place. [2024-06-20 15:14:09,160 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 138 selfloop transitions, 27 changer transitions 0/182 dead transitions. [2024-06-20 15:14:09,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 182 transitions, 1935 flow [2024-06-20 15:14:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:14:09,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:14:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-20 15:14:09,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:14:09,162 INFO L175 Difference]: Start difference. First operand has 154 places, 166 transitions, 1565 flow. Second operand 5 states and 125 transitions. [2024-06-20 15:14:09,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 182 transitions, 1935 flow [2024-06-20 15:14:09,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 182 transitions, 1837 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:09,243 INFO L231 Difference]: Finished difference. Result has 155 places, 166 transitions, 1531 flow [2024-06-20 15:14:09,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1531, PETRI_PLACES=155, PETRI_TRANSITIONS=166} [2024-06-20 15:14:09,243 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-20 15:14:09,243 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 166 transitions, 1531 flow [2024-06-20 15:14:09,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:09,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:09,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:14:09,244 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)] === [2024-06-20 15:14:09,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:09,244 INFO L85 PathProgramCache]: Analyzing trace with hash -154294055, now seen corresponding path program 1 times [2024-06-20 15:14:09,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:09,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085480599] [2024-06-20 15:14:09,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:09,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:09,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:09,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085480599] [2024-06-20 15:14:09,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085480599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:09,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:09,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:09,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350651274] [2024-06-20 15:14:09,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:09,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:09,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:09,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:09,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:09,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:09,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 166 transitions, 1531 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:09,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:09,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:09,701 INFO L124 PetriNetUnfolderBase]: 1256/2130 cut-off events. [2024-06-20 15:14:09,702 INFO L125 PetriNetUnfolderBase]: For 54741/54749 co-relation queries the response was YES. [2024-06-20 15:14:09,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11559 conditions, 2130 events. 1256/2130 cut-off events. For 54741/54749 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11851 event pairs, 335 based on Foata normal form. 9/2137 useless extension candidates. Maximal degree in co-relation 11482. Up to 1767 conditions per place. [2024-06-20 15:14:09,718 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 139 selfloop transitions, 54 changer transitions 0/200 dead transitions. [2024-06-20 15:14:09,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 200 transitions, 2241 flow [2024-06-20 15:14:09,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:09,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 15:14:09,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 15:14:09,719 INFO L175 Difference]: Start difference. First operand has 155 places, 166 transitions, 1531 flow. Second operand 7 states and 170 transitions. [2024-06-20 15:14:09,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 200 transitions, 2241 flow [2024-06-20 15:14:09,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 200 transitions, 2179 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:09,808 INFO L231 Difference]: Finished difference. Result has 158 places, 175 transitions, 1703 flow [2024-06-20 15:14:09,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1703, PETRI_PLACES=158, PETRI_TRANSITIONS=175} [2024-06-20 15:14:09,809 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-20 15:14:09,809 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 175 transitions, 1703 flow [2024-06-20 15:14:09,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:09,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:09,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:14:09,809 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)] === [2024-06-20 15:14:09,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:09,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1033448141, now seen corresponding path program 1 times [2024-06-20 15:14:09,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:09,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497820044] [2024-06-20 15:14:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:09,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:09,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:09,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497820044] [2024-06-20 15:14:09,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497820044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:09,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:09,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:09,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774563490] [2024-06-20 15:14:09,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:09,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:09,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:09,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:09,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:09,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:09,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 175 transitions, 1703 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:09,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:09,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:09,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:10,372 INFO L124 PetriNetUnfolderBase]: 1282/2171 cut-off events. [2024-06-20 15:14:10,372 INFO L125 PetriNetUnfolderBase]: For 60122/60134 co-relation queries the response was YES. [2024-06-20 15:14:10,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12250 conditions, 2171 events. 1282/2171 cut-off events. For 60122/60134 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12111 event pairs, 322 based on Foata normal form. 13/2183 useless extension candidates. Maximal degree in co-relation 12172. Up to 1843 conditions per place. [2024-06-20 15:14:10,388 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 142 selfloop transitions, 63 changer transitions 0/212 dead transitions. [2024-06-20 15:14:10,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 212 transitions, 2492 flow [2024-06-20 15:14:10,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:10,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-20 15:14:10,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2024-06-20 15:14:10,389 INFO L175 Difference]: Start difference. First operand has 158 places, 175 transitions, 1703 flow. Second operand 10 states and 221 transitions. [2024-06-20 15:14:10,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 212 transitions, 2492 flow [2024-06-20 15:14:10,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 212 transitions, 2403 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:10,494 INFO L231 Difference]: Finished difference. Result has 166 places, 187 transitions, 1919 flow [2024-06-20 15:14:10,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1919, PETRI_PLACES=166, PETRI_TRANSITIONS=187} [2024-06-20 15:14:10,494 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-20 15:14:10,494 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 187 transitions, 1919 flow [2024-06-20 15:14:10,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:10,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:10,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:10,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:14:10,495 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)] === [2024-06-20 15:14:10,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:10,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1033447955, now seen corresponding path program 2 times [2024-06-20 15:14:10,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:10,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546204577] [2024-06-20 15:14:10,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:10,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:10,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:10,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546204577] [2024-06-20 15:14:10,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546204577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:10,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:10,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:10,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136998592] [2024-06-20 15:14:10,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:10,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:10,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:10,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:10,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:10,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:10,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 187 transitions, 1919 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:10,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:10,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:10,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:10,973 INFO L124 PetriNetUnfolderBase]: 1287/2180 cut-off events. [2024-06-20 15:14:10,974 INFO L125 PetriNetUnfolderBase]: For 63974/63986 co-relation queries the response was YES. [2024-06-20 15:14:10,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12630 conditions, 2180 events. 1287/2180 cut-off events. For 63974/63986 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12199 event pairs, 322 based on Foata normal form. 13/2192 useless extension candidates. Maximal degree in co-relation 12550. Up to 1891 conditions per place. [2024-06-20 15:14:10,994 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 165 selfloop transitions, 38 changer transitions 0/210 dead transitions. [2024-06-20 15:14:10,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 210 transitions, 2403 flow [2024-06-20 15:14:10,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:10,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 15:14:10,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-20 15:14:10,996 INFO L175 Difference]: Start difference. First operand has 166 places, 187 transitions, 1919 flow. Second operand 7 states and 162 transitions. [2024-06-20 15:14:10,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 210 transitions, 2403 flow [2024-06-20 15:14:11,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 210 transitions, 2276 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:11,107 INFO L231 Difference]: Finished difference. Result has 169 places, 190 transitions, 1908 flow [2024-06-20 15:14:11,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1908, PETRI_PLACES=169, PETRI_TRANSITIONS=190} [2024-06-20 15:14:11,107 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-20 15:14:11,107 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 190 transitions, 1908 flow [2024-06-20 15:14:11,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:11,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:11,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:14:11,109 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)] === [2024-06-20 15:14:11,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:11,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1210816811, now seen corresponding path program 2 times [2024-06-20 15:14:11,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:11,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725375955] [2024-06-20 15:14:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:11,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:11,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:11,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725375955] [2024-06-20 15:14:11,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725375955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:11,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:11,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:11,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819834041] [2024-06-20 15:14:11,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:11,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:11,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:11,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:11,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:11,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:11,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 190 transitions, 1908 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:11,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:11,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:11,714 INFO L124 PetriNetUnfolderBase]: 1318/2229 cut-off events. [2024-06-20 15:14:11,715 INFO L125 PetriNetUnfolderBase]: For 68552/68564 co-relation queries the response was YES. [2024-06-20 15:14:11,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13090 conditions, 2229 events. 1318/2229 cut-off events. For 68552/68564 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 12539 event pairs, 322 based on Foata normal form. 13/2241 useless extension candidates. Maximal degree in co-relation 13008. Up to 1882 conditions per place. [2024-06-20 15:14:11,735 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 144 selfloop transitions, 75 changer transitions 0/226 dead transitions. [2024-06-20 15:14:11,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 226 transitions, 2743 flow [2024-06-20 15:14:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-20 15:14:11,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-20 15:14:11,737 INFO L175 Difference]: Start difference. First operand has 169 places, 190 transitions, 1908 flow. Second operand 9 states and 201 transitions. [2024-06-20 15:14:11,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 226 transitions, 2743 flow [2024-06-20 15:14:11,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 226 transitions, 2643 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:11,881 INFO L231 Difference]: Finished difference. Result has 173 places, 205 transitions, 2151 flow [2024-06-20 15:14:11,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2151, PETRI_PLACES=173, PETRI_TRANSITIONS=205} [2024-06-20 15:14:11,881 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-20 15:14:11,882 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 205 transitions, 2151 flow [2024-06-20 15:14:11,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:11,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:11,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:11,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:14:11,882 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)] === [2024-06-20 15:14:11,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1210579475, now seen corresponding path program 3 times [2024-06-20 15:14:11,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:11,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933631593] [2024-06-20 15:14:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:11,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:12,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:12,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933631593] [2024-06-20 15:14:12,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933631593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:12,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:12,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:12,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086889891] [2024-06-20 15:14:12,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:12,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:12,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:12,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:12,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:12,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:12,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 205 transitions, 2151 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:12,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:12,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:12,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:12,385 INFO L124 PetriNetUnfolderBase]: 1331/2251 cut-off events. [2024-06-20 15:14:12,385 INFO L125 PetriNetUnfolderBase]: For 72643/72655 co-relation queries the response was YES. [2024-06-20 15:14:12,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13383 conditions, 2251 events. 1331/2251 cut-off events. For 72643/72655 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12663 event pairs, 322 based on Foata normal form. 13/2263 useless extension candidates. Maximal degree in co-relation 13300. Up to 1943 conditions per place. [2024-06-20 15:14:12,404 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 173 selfloop transitions, 50 changer transitions 0/230 dead transitions. [2024-06-20 15:14:12,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 230 transitions, 2795 flow [2024-06-20 15:14:12,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-20 15:14:12,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-20 15:14:12,405 INFO L175 Difference]: Start difference. First operand has 173 places, 205 transitions, 2151 flow. Second operand 8 states and 178 transitions. [2024-06-20 15:14:12,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 230 transitions, 2795 flow [2024-06-20 15:14:12,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 230 transitions, 2682 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:12,550 INFO L231 Difference]: Finished difference. Result has 179 places, 211 transitions, 2234 flow [2024-06-20 15:14:12,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2234, PETRI_PLACES=179, PETRI_TRANSITIONS=211} [2024-06-20 15:14:12,550 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-20 15:14:12,550 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 211 transitions, 2234 flow [2024-06-20 15:14:12,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:12,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:12,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:12,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:14:12,551 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)] === [2024-06-20 15:14:12,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:12,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1126390637, now seen corresponding path program 3 times [2024-06-20 15:14:12,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:12,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476498521] [2024-06-20 15:14:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:12,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:12,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:12,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476498521] [2024-06-20 15:14:12,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476498521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:12,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:12,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:12,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007493734] [2024-06-20 15:14:12,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:12,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:12,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:12,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:12,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:12,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:12,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 211 transitions, 2234 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:12,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:12,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:12,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:13,086 INFO L124 PetriNetUnfolderBase]: 1328/2247 cut-off events. [2024-06-20 15:14:13,087 INFO L125 PetriNetUnfolderBase]: For 75138/75150 co-relation queries the response was YES. [2024-06-20 15:14:13,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13387 conditions, 2247 events. 1328/2247 cut-off events. For 75138/75150 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12679 event pairs, 322 based on Foata normal form. 13/2259 useless extension candidates. Maximal degree in co-relation 13302. Up to 1897 conditions per place. [2024-06-20 15:14:13,106 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 151 selfloop transitions, 76 changer transitions 0/234 dead transitions. [2024-06-20 15:14:13,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 234 transitions, 2910 flow [2024-06-20 15:14:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:14:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:14:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-20 15:14:13,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386363636363637 [2024-06-20 15:14:13,108 INFO L175 Difference]: Start difference. First operand has 179 places, 211 transitions, 2234 flow. Second operand 11 states and 237 transitions. [2024-06-20 15:14:13,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 234 transitions, 2910 flow [2024-06-20 15:14:13,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 234 transitions, 2790 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:13,269 INFO L231 Difference]: Finished difference. Result has 186 places, 211 transitions, 2272 flow [2024-06-20 15:14:13,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2272, PETRI_PLACES=186, PETRI_TRANSITIONS=211} [2024-06-20 15:14:13,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-20 15:14:13,271 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 211 transitions, 2272 flow [2024-06-20 15:14:13,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:13,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:13,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:13,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:14:13,272 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)] === [2024-06-20 15:14:13,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:13,274 INFO L85 PathProgramCache]: Analyzing trace with hash 944790125, now seen corresponding path program 1 times [2024-06-20 15:14:13,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:13,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567190735] [2024-06-20 15:14:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:13,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:13,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:13,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567190735] [2024-06-20 15:14:13,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567190735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:13,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:13,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:13,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84459770] [2024-06-20 15:14:13,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:13,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:13,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:13,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:13,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:13,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:13,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 211 transitions, 2272 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:13,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:13,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:13,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:13,836 INFO L124 PetriNetUnfolderBase]: 1402/2363 cut-off events. [2024-06-20 15:14:13,837 INFO L125 PetriNetUnfolderBase]: For 90450/90458 co-relation queries the response was YES. [2024-06-20 15:14:13,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14307 conditions, 2363 events. 1402/2363 cut-off events. For 90450/90458 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13421 event pairs, 244 based on Foata normal form. 14/2376 useless extension candidates. Maximal degree in co-relation 14221. Up to 1984 conditions per place. [2024-06-20 15:14:13,856 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 207 selfloop transitions, 35 changer transitions 0/249 dead transitions. [2024-06-20 15:14:13,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 249 transitions, 3006 flow [2024-06-20 15:14:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-20 15:14:13,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-20 15:14:13,860 INFO L175 Difference]: Start difference. First operand has 186 places, 211 transitions, 2272 flow. Second operand 9 states and 202 transitions. [2024-06-20 15:14:13,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 249 transitions, 3006 flow [2024-06-20 15:14:14,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 249 transitions, 2830 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 15:14:14,070 INFO L231 Difference]: Finished difference. Result has 188 places, 216 transitions, 2236 flow [2024-06-20 15:14:14,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2236, PETRI_PLACES=188, PETRI_TRANSITIONS=216} [2024-06-20 15:14:14,071 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-20 15:14:14,071 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 216 transitions, 2236 flow [2024-06-20 15:14:14,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:14,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:14,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:14,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:14:14,072 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)] === [2024-06-20 15:14:14,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1210813835, now seen corresponding path program 2 times [2024-06-20 15:14:14,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:14,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343485382] [2024-06-20 15:14:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:14,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:14,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:14,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343485382] [2024-06-20 15:14:14,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343485382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:14,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:14,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:14,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595575276] [2024-06-20 15:14:14,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:14,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:14,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:14,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:14,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:14,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:14,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 216 transitions, 2236 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:14,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:14,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:14,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:14,595 INFO L124 PetriNetUnfolderBase]: 1430/2411 cut-off events. [2024-06-20 15:14:14,595 INFO L125 PetriNetUnfolderBase]: For 96531/96539 co-relation queries the response was YES. [2024-06-20 15:14:14,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14656 conditions, 2411 events. 1430/2411 cut-off events. For 96531/96539 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 13757 event pairs, 325 based on Foata normal form. 16/2426 useless extension candidates. Maximal degree in co-relation 14567. Up to 2128 conditions per place. [2024-06-20 15:14:14,615 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 205 selfloop transitions, 30 changer transitions 0/242 dead transitions. [2024-06-20 15:14:14,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 242 transitions, 2807 flow [2024-06-20 15:14:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-20 15:14:14,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-20 15:14:14,623 INFO L175 Difference]: Start difference. First operand has 188 places, 216 transitions, 2236 flow. Second operand 9 states and 195 transitions. [2024-06-20 15:14:14,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 242 transitions, 2807 flow [2024-06-20 15:14:14,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 242 transitions, 2762 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:14,844 INFO L231 Difference]: Finished difference. Result has 193 places, 217 transitions, 2269 flow [2024-06-20 15:14:14,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2269, PETRI_PLACES=193, PETRI_TRANSITIONS=217} [2024-06-20 15:14:14,844 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-20 15:14:14,845 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 217 transitions, 2269 flow [2024-06-20 15:14:14,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:14,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:14,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:14,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:14:14,845 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)] === [2024-06-20 15:14:14,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:14,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1210487405, now seen corresponding path program 3 times [2024-06-20 15:14:14,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:14,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375999672] [2024-06-20 15:14:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:14,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:15,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:15,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375999672] [2024-06-20 15:14:15,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375999672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:15,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:15,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:15,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78354855] [2024-06-20 15:14:15,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:15,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:15,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:15,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:15,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:15,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 217 transitions, 2269 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:15,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:15,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:15,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:15,442 INFO L124 PetriNetUnfolderBase]: 1458/2455 cut-off events. [2024-06-20 15:14:15,442 INFO L125 PetriNetUnfolderBase]: For 98782/98790 co-relation queries the response was YES. [2024-06-20 15:14:15,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15006 conditions, 2455 events. 1458/2455 cut-off events. For 98782/98790 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14047 event pairs, 323 based on Foata normal form. 14/2468 useless extension candidates. Maximal degree in co-relation 14915. Up to 2142 conditions per place. [2024-06-20 15:14:15,465 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 209 selfloop transitions, 33 changer transitions 0/249 dead transitions. [2024-06-20 15:14:15,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 249 transitions, 2896 flow [2024-06-20 15:14:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-20 15:14:15,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-20 15:14:15,466 INFO L175 Difference]: Start difference. First operand has 193 places, 217 transitions, 2269 flow. Second operand 10 states and 215 transitions. [2024-06-20 15:14:15,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 249 transitions, 2896 flow [2024-06-20 15:14:15,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 249 transitions, 2837 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:15,649 INFO L231 Difference]: Finished difference. Result has 197 places, 220 transitions, 2325 flow [2024-06-20 15:14:15,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2325, PETRI_PLACES=197, PETRI_TRANSITIONS=220} [2024-06-20 15:14:15,650 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-20 15:14:15,650 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 220 transitions, 2325 flow [2024-06-20 15:14:15,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:15,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:15,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:15,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:14:15,651 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)] === [2024-06-20 15:14:15,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:15,651 INFO L85 PathProgramCache]: Analyzing trace with hash 318037639, now seen corresponding path program 4 times [2024-06-20 15:14:15,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:15,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538861527] [2024-06-20 15:14:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:15,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:15,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:15,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538861527] [2024-06-20 15:14:15,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538861527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:15,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:15,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:15,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137738465] [2024-06-20 15:14:15,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:15,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:15,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:15,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:15,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:15,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:15,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 220 transitions, 2325 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:15,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:15,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:15,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:16,252 INFO L124 PetriNetUnfolderBase]: 1471/2479 cut-off events. [2024-06-20 15:14:16,252 INFO L125 PetriNetUnfolderBase]: For 99355/99367 co-relation queries the response was YES. [2024-06-20 15:14:16,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15345 conditions, 2479 events. 1471/2479 cut-off events. For 99355/99367 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14249 event pairs, 350 based on Foata normal form. 13/2491 useless extension candidates. Maximal degree in co-relation 15252. Up to 2111 conditions per place. [2024-06-20 15:14:16,273 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 189 selfloop transitions, 59 changer transitions 0/255 dead transitions. [2024-06-20 15:14:16,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 255 transitions, 3161 flow [2024-06-20 15:14:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:14:16,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 15:14:16,275 INFO L175 Difference]: Start difference. First operand has 197 places, 220 transitions, 2325 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:14:16,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 255 transitions, 3161 flow [2024-06-20 15:14:16,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 255 transitions, 3095 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:16,514 INFO L231 Difference]: Finished difference. Result has 198 places, 226 transitions, 2467 flow [2024-06-20 15:14:16,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2467, PETRI_PLACES=198, PETRI_TRANSITIONS=226} [2024-06-20 15:14:16,514 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-20 15:14:16,514 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 226 transitions, 2467 flow [2024-06-20 15:14:16,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:16,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:16,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:16,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:14:16,515 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)] === [2024-06-20 15:14:16,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:16,516 INFO L85 PathProgramCache]: Analyzing trace with hash -700013827, now seen corresponding path program 5 times [2024-06-20 15:14:16,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:16,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685085983] [2024-06-20 15:14:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:16,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:16,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:16,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685085983] [2024-06-20 15:14:16,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685085983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:16,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:16,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:16,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059385102] [2024-06-20 15:14:16,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:16,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:16,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:16,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:16,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:16,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 226 transitions, 2467 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:16,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:16,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:16,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:17,072 INFO L124 PetriNetUnfolderBase]: 1484/2499 cut-off events. [2024-06-20 15:14:17,072 INFO L125 PetriNetUnfolderBase]: For 104835/104847 co-relation queries the response was YES. [2024-06-20 15:14:17,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15659 conditions, 2499 events. 1484/2499 cut-off events. For 104835/104847 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14396 event pairs, 350 based on Foata normal form. 13/2511 useless extension candidates. Maximal degree in co-relation 15565. Up to 2126 conditions per place. [2024-06-20 15:14:17,096 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 184 selfloop transitions, 68 changer transitions 0/259 dead transitions. [2024-06-20 15:14:17,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 259 transitions, 3321 flow [2024-06-20 15:14:17,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:17,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-20 15:14:17,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-20 15:14:17,097 INFO L175 Difference]: Start difference. First operand has 198 places, 226 transitions, 2467 flow. Second operand 9 states and 206 transitions. [2024-06-20 15:14:17,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 259 transitions, 3321 flow [2024-06-20 15:14:17,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 259 transitions, 3105 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:17,327 INFO L231 Difference]: Finished difference. Result has 202 places, 232 transitions, 2489 flow [2024-06-20 15:14:17,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2489, PETRI_PLACES=202, PETRI_TRANSITIONS=232} [2024-06-20 15:14:17,328 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-20 15:14:17,328 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 232 transitions, 2489 flow [2024-06-20 15:14:17,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:17,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:17,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:17,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:14:17,329 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)] === [2024-06-20 15:14:17,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:17,329 INFO L85 PathProgramCache]: Analyzing trace with hash -700013455, now seen corresponding path program 1 times [2024-06-20 15:14:17,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:17,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362955621] [2024-06-20 15:14:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:17,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:17,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:17,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362955621] [2024-06-20 15:14:17,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362955621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:17,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:17,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:17,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044109079] [2024-06-20 15:14:17,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:17,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:17,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:17,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:17,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:17,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 232 transitions, 2489 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:17,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:17,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:17,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:17,904 INFO L124 PetriNetUnfolderBase]: 1497/2519 cut-off events. [2024-06-20 15:14:17,904 INFO L125 PetriNetUnfolderBase]: For 109585/109597 co-relation queries the response was YES. [2024-06-20 15:14:17,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15853 conditions, 2519 events. 1497/2519 cut-off events. For 109585/109597 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14495 event pairs, 349 based on Foata normal form. 13/2531 useless extension candidates. Maximal degree in co-relation 15758. Up to 2186 conditions per place. [2024-06-20 15:14:17,926 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 194 selfloop transitions, 53 changer transitions 0/254 dead transitions. [2024-06-20 15:14:17,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 254 transitions, 3213 flow [2024-06-20 15:14:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-20 15:14:17,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-20 15:14:17,927 INFO L175 Difference]: Start difference. First operand has 202 places, 232 transitions, 2489 flow. Second operand 8 states and 179 transitions. [2024-06-20 15:14:17,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 254 transitions, 3213 flow [2024-06-20 15:14:18,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 254 transitions, 3083 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:18,118 INFO L231 Difference]: Finished difference. Result has 205 places, 238 transitions, 2577 flow [2024-06-20 15:14:18,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2359, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2577, PETRI_PLACES=205, PETRI_TRANSITIONS=238} [2024-06-20 15:14:18,119 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-20 15:14:18,119 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 238 transitions, 2577 flow [2024-06-20 15:14:18,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:18,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:18,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:18,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:14:18,119 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)] === [2024-06-20 15:14:18,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash -705674737, now seen corresponding path program 6 times [2024-06-20 15:14:18,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:18,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112453871] [2024-06-20 15:14:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:18,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:18,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:18,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112453871] [2024-06-20 15:14:18,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112453871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:18,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:18,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:18,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63711609] [2024-06-20 15:14:18,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:18,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:18,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:18,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:18,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:18,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:18,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 238 transitions, 2577 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:18,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:18,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:18,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:18,659 INFO L124 PetriNetUnfolderBase]: 1494/2514 cut-off events. [2024-06-20 15:14:18,660 INFO L125 PetriNetUnfolderBase]: For 113382/113390 co-relation queries the response was YES. [2024-06-20 15:14:18,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16020 conditions, 2514 events. 1494/2514 cut-off events. For 113382/113390 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14452 event pairs, 361 based on Foata normal form. 9/2521 useless extension candidates. Maximal degree in co-relation 15924. Up to 2141 conditions per place. [2024-06-20 15:14:18,688 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 191 selfloop transitions, 61 changer transitions 0/259 dead transitions. [2024-06-20 15:14:18,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 259 transitions, 3329 flow [2024-06-20 15:14:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:14:18,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-20 15:14:18,689 INFO L175 Difference]: Start difference. First operand has 205 places, 238 transitions, 2577 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:14:18,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 259 transitions, 3329 flow [2024-06-20 15:14:18,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 259 transitions, 3207 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:18,961 INFO L231 Difference]: Finished difference. Result has 206 places, 238 transitions, 2587 flow [2024-06-20 15:14:18,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2587, PETRI_PLACES=206, PETRI_TRANSITIONS=238} [2024-06-20 15:14:18,962 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-20 15:14:18,962 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 238 transitions, 2587 flow [2024-06-20 15:14:18,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:18,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:18,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:18,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:14:18,963 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)] === [2024-06-20 15:14:18,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:18,964 INFO L85 PathProgramCache]: Analyzing trace with hash -705554581, now seen corresponding path program 4 times [2024-06-20 15:14:18,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:18,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711752857] [2024-06-20 15:14:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:18,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:19,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:19,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711752857] [2024-06-20 15:14:19,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711752857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:19,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:19,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:19,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022310528] [2024-06-20 15:14:19,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:19,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:19,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:19,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:19,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:19,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:19,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 238 transitions, 2587 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:19,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:19,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:19,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:19,543 INFO L124 PetriNetUnfolderBase]: 1491/2511 cut-off events. [2024-06-20 15:14:19,543 INFO L125 PetriNetUnfolderBase]: For 112438/112450 co-relation queries the response was YES. [2024-06-20 15:14:19,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16025 conditions, 2511 events. 1491/2511 cut-off events. For 112438/112450 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14454 event pairs, 349 based on Foata normal form. 13/2523 useless extension candidates. Maximal degree in co-relation 15928. Up to 2181 conditions per place. [2024-06-20 15:14:19,570 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 195 selfloop transitions, 54 changer transitions 0/256 dead transitions. [2024-06-20 15:14:19,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 256 transitions, 3227 flow [2024-06-20 15:14:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 15:14:19,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-20 15:14:19,571 INFO L175 Difference]: Start difference. First operand has 206 places, 238 transitions, 2587 flow. Second operand 7 states and 164 transitions. [2024-06-20 15:14:19,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 256 transitions, 3227 flow [2024-06-20 15:14:19,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 256 transitions, 3075 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:19,814 INFO L231 Difference]: Finished difference. Result has 208 places, 238 transitions, 2553 flow [2024-06-20 15:14:19,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2553, PETRI_PLACES=208, PETRI_TRANSITIONS=238} [2024-06-20 15:14:19,814 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-20 15:14:19,814 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 238 transitions, 2553 flow [2024-06-20 15:14:19,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:19,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:19,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:19,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:14:19,815 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)] === [2024-06-20 15:14:19,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:19,815 INFO L85 PathProgramCache]: Analyzing trace with hash -705554767, now seen corresponding path program 7 times [2024-06-20 15:14:19,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:19,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264167515] [2024-06-20 15:14:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:19,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:20,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:20,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264167515] [2024-06-20 15:14:20,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264167515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:20,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:20,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:20,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345400780] [2024-06-20 15:14:20,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:20,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:20,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:20,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:20,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:20,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:20,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 238 transitions, 2553 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:20,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:20,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:20,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:20,428 INFO L124 PetriNetUnfolderBase]: 1488/2507 cut-off events. [2024-06-20 15:14:20,428 INFO L125 PetriNetUnfolderBase]: For 115189/115201 co-relation queries the response was YES. [2024-06-20 15:14:20,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15991 conditions, 2507 events. 1488/2507 cut-off events. For 115189/115201 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14428 event pairs, 349 based on Foata normal form. 13/2519 useless extension candidates. Maximal degree in co-relation 15893. Up to 2208 conditions per place. [2024-06-20 15:14:20,453 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 213 selfloop transitions, 34 changer transitions 0/254 dead transitions. [2024-06-20 15:14:20,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 254 transitions, 3087 flow [2024-06-20 15:14:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:20,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:20,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 15:14:20,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:14:20,455 INFO L175 Difference]: Start difference. First operand has 208 places, 238 transitions, 2553 flow. Second operand 6 states and 141 transitions. [2024-06-20 15:14:20,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 254 transitions, 3087 flow [2024-06-20 15:14:20,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 254 transitions, 2984 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:20,705 INFO L231 Difference]: Finished difference. Result has 209 places, 238 transitions, 2524 flow [2024-06-20 15:14:20,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2524, PETRI_PLACES=209, PETRI_TRANSITIONS=238} [2024-06-20 15:14:20,706 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-20 15:14:20,706 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 238 transitions, 2524 flow [2024-06-20 15:14:20,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:20,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:20,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:20,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:14:20,707 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)] === [2024-06-20 15:14:20,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash 620163953, now seen corresponding path program 8 times [2024-06-20 15:14:20,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:20,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182609694] [2024-06-20 15:14:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:20,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:20,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:20,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182609694] [2024-06-20 15:14:20,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182609694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:20,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:20,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:20,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000956775] [2024-06-20 15:14:20,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:20,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:20,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:20,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:20,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:20,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:20,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 238 transitions, 2524 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:20,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:20,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:20,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:21,313 INFO L124 PetriNetUnfolderBase]: 1485/2505 cut-off events. [2024-06-20 15:14:21,313 INFO L125 PetriNetUnfolderBase]: For 118170/118182 co-relation queries the response was YES. [2024-06-20 15:14:21,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15972 conditions, 2505 events. 1485/2505 cut-off events. For 118170/118182 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14449 event pairs, 349 based on Foata normal form. 13/2517 useless extension candidates. Maximal degree in co-relation 15873. Up to 2148 conditions per place. [2024-06-20 15:14:21,337 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 204 selfloop transitions, 54 changer transitions 0/265 dead transitions. [2024-06-20 15:14:21,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 265 transitions, 3210 flow [2024-06-20 15:14:21,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:21,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:21,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:14:21,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-20 15:14:21,339 INFO L175 Difference]: Start difference. First operand has 209 places, 238 transitions, 2524 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:14:21,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 265 transitions, 3210 flow [2024-06-20 15:14:21,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 265 transitions, 3122 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:21,622 INFO L231 Difference]: Finished difference. Result has 211 places, 238 transitions, 2558 flow [2024-06-20 15:14:21,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2558, PETRI_PLACES=211, PETRI_TRANSITIONS=238} [2024-06-20 15:14:21,623 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-20 15:14:21,623 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 238 transitions, 2558 flow [2024-06-20 15:14:21,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:21,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:21,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:21,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:14:21,624 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)] === [2024-06-20 15:14:21,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:21,624 INFO L85 PathProgramCache]: Analyzing trace with hash 620175485, now seen corresponding path program 2 times [2024-06-20 15:14:21,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:21,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972586233] [2024-06-20 15:14:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:21,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:21,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:21,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972586233] [2024-06-20 15:14:21,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972586233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:21,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:21,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:21,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133242099] [2024-06-20 15:14:21,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:21,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:21,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:21,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:21,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:21,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:21,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 238 transitions, 2558 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:21,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:21,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:21,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:22,232 INFO L124 PetriNetUnfolderBase]: 1514/2548 cut-off events. [2024-06-20 15:14:22,232 INFO L125 PetriNetUnfolderBase]: For 124275/124287 co-relation queries the response was YES. [2024-06-20 15:14:22,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16507 conditions, 2548 events. 1514/2548 cut-off events. For 124275/124287 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 14668 event pairs, 349 based on Foata normal form. 13/2560 useless extension candidates. Maximal degree in co-relation 16407. Up to 2231 conditions per place. [2024-06-20 15:14:22,257 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 212 selfloop transitions, 46 changer transitions 0/265 dead transitions. [2024-06-20 15:14:22,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 265 transitions, 3383 flow [2024-06-20 15:14:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 15:14:22,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 15:14:22,258 INFO L175 Difference]: Start difference. First operand has 211 places, 238 transitions, 2558 flow. Second operand 7 states and 160 transitions. [2024-06-20 15:14:22,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 265 transitions, 3383 flow [2024-06-20 15:14:22,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 265 transitions, 3221 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 15:14:22,520 INFO L231 Difference]: Finished difference. Result has 210 places, 250 transitions, 2704 flow [2024-06-20 15:14:22,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2414, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2704, PETRI_PLACES=210, PETRI_TRANSITIONS=250} [2024-06-20 15:14:22,520 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-20 15:14:22,520 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 250 transitions, 2704 flow [2024-06-20 15:14:22,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:22,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:22,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:22,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:14:22,521 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)] === [2024-06-20 15:14:22,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:22,522 INFO L85 PathProgramCache]: Analyzing trace with hash 620164139, now seen corresponding path program 5 times [2024-06-20 15:14:22,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:22,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038508622] [2024-06-20 15:14:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:22,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:22,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:22,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038508622] [2024-06-20 15:14:22,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038508622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:22,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:22,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:22,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423404018] [2024-06-20 15:14:22,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:22,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:22,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:22,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:22,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:22,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:22,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 250 transitions, 2704 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:22,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:22,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:22,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:23,107 INFO L124 PetriNetUnfolderBase]: 1519/2557 cut-off events. [2024-06-20 15:14:23,108 INFO L125 PetriNetUnfolderBase]: For 119855/119869 co-relation queries the response was YES. [2024-06-20 15:14:23,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16450 conditions, 2557 events. 1519/2557 cut-off events. For 119855/119869 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14739 event pairs, 349 based on Foata normal form. 15/2571 useless extension candidates. Maximal degree in co-relation 16350. Up to 2220 conditions per place. [2024-06-20 15:14:23,129 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 206 selfloop transitions, 57 changer transitions 0/270 dead transitions. [2024-06-20 15:14:23,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 270 transitions, 3420 flow [2024-06-20 15:14:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:23,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 15:14:23,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-20 15:14:23,130 INFO L175 Difference]: Start difference. First operand has 210 places, 250 transitions, 2704 flow. Second operand 6 states and 145 transitions. [2024-06-20 15:14:23,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 270 transitions, 3420 flow [2024-06-20 15:14:23,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 270 transitions, 3359 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:23,369 INFO L231 Difference]: Finished difference. Result has 213 places, 253 transitions, 2823 flow [2024-06-20 15:14:23,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2823, PETRI_PLACES=213, PETRI_TRANSITIONS=253} [2024-06-20 15:14:23,370 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-20 15:14:23,370 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 253 transitions, 2823 flow [2024-06-20 15:14:23,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:23,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:23,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:23,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:14:23,371 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)] === [2024-06-20 15:14:23,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:23,371 INFO L85 PathProgramCache]: Analyzing trace with hash 620169905, now seen corresponding path program 3 times [2024-06-20 15:14:23,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:23,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325908886] [2024-06-20 15:14:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:23,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:23,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:23,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325908886] [2024-06-20 15:14:23,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325908886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:23,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:23,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:23,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86738629] [2024-06-20 15:14:23,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:23,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:23,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:23,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:23,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:23,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:23,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 253 transitions, 2823 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:23,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:23,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:23,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:23,940 INFO L124 PetriNetUnfolderBase]: 1516/2553 cut-off events. [2024-06-20 15:14:23,940 INFO L125 PetriNetUnfolderBase]: For 118707/118721 co-relation queries the response was YES. [2024-06-20 15:14:23,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16501 conditions, 2553 events. 1516/2553 cut-off events. For 118707/118721 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14724 event pairs, 349 based on Foata normal form. 15/2567 useless extension candidates. Maximal degree in co-relation 16400. Up to 2235 conditions per place. [2024-06-20 15:14:23,965 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 213 selfloop transitions, 46 changer transitions 0/266 dead transitions. [2024-06-20 15:14:23,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 266 transitions, 3373 flow [2024-06-20 15:14:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 15:14:23,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:14:23,966 INFO L175 Difference]: Start difference. First operand has 213 places, 253 transitions, 2823 flow. Second operand 6 states and 141 transitions. [2024-06-20 15:14:23,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 266 transitions, 3373 flow [2024-06-20 15:14:24,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 266 transitions, 3235 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:24,233 INFO L231 Difference]: Finished difference. Result has 214 places, 253 transitions, 2787 flow [2024-06-20 15:14:24,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2787, PETRI_PLACES=214, PETRI_TRANSITIONS=253} [2024-06-20 15:14:24,233 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-20 15:14:24,233 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 253 transitions, 2787 flow [2024-06-20 15:14:24,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:24,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:24,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:24,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:14:24,234 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)] === [2024-06-20 15:14:24,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:24,234 INFO L85 PathProgramCache]: Analyzing trace with hash 620175299, now seen corresponding path program 6 times [2024-06-20 15:14:24,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:24,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574737501] [2024-06-20 15:14:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:24,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:24,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:24,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574737501] [2024-06-20 15:14:24,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574737501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:24,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:24,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:24,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048152182] [2024-06-20 15:14:24,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:24,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:24,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:24,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:24,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:24,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:24,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 253 transitions, 2787 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:24,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:24,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:24,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:24,790 INFO L124 PetriNetUnfolderBase]: 1513/2549 cut-off events. [2024-06-20 15:14:24,791 INFO L125 PetriNetUnfolderBase]: For 113372/113386 co-relation queries the response was YES. [2024-06-20 15:14:24,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16286 conditions, 2549 events. 1513/2549 cut-off events. For 113372/113386 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14719 event pairs, 349 based on Foata normal form. 15/2563 useless extension candidates. Maximal degree in co-relation 16186. Up to 2213 conditions per place. [2024-06-20 15:14:24,814 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 206 selfloop transitions, 57 changer transitions 0/270 dead transitions. [2024-06-20 15:14:24,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 270 transitions, 3355 flow [2024-06-20 15:14:24,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 15:14:24,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-20 15:14:24,816 INFO L175 Difference]: Start difference. First operand has 214 places, 253 transitions, 2787 flow. Second operand 7 states and 162 transitions. [2024-06-20 15:14:24,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 270 transitions, 3355 flow [2024-06-20 15:14:25,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 270 transitions, 3233 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:25,159 INFO L231 Difference]: Finished difference. Result has 215 places, 253 transitions, 2789 flow [2024-06-20 15:14:25,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2665, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2789, PETRI_PLACES=215, PETRI_TRANSITIONS=253} [2024-06-20 15:14:25,160 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-20 15:14:25,160 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 253 transitions, 2789 flow [2024-06-20 15:14:25,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:25,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:25,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:25,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:14:25,160 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)] === [2024-06-20 15:14:25,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:25,161 INFO L85 PathProgramCache]: Analyzing trace with hash 620169533, now seen corresponding path program 9 times [2024-06-20 15:14:25,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:25,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786152959] [2024-06-20 15:14:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:25,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:25,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:25,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786152959] [2024-06-20 15:14:25,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786152959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:25,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:25,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:25,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31211399] [2024-06-20 15:14:25,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:25,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:25,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:25,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:25,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:25,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:25,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 253 transitions, 2789 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:25,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:25,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:25,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:25,726 INFO L124 PetriNetUnfolderBase]: 1510/2545 cut-off events. [2024-06-20 15:14:25,726 INFO L125 PetriNetUnfolderBase]: For 112095/112109 co-relation queries the response was YES. [2024-06-20 15:14:25,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16222 conditions, 2545 events. 1510/2545 cut-off events. For 112095/112109 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14686 event pairs, 349 based on Foata normal form. 15/2559 useless extension candidates. Maximal degree in co-relation 16122. Up to 2173 conditions per place. [2024-06-20 15:14:25,750 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 208 selfloop transitions, 60 changer transitions 0/275 dead transitions. [2024-06-20 15:14:25,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 275 transitions, 3381 flow [2024-06-20 15:14:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:14:25,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:14:25,752 INFO L175 Difference]: Start difference. First operand has 215 places, 253 transitions, 2789 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:14:25,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 275 transitions, 3381 flow [2024-06-20 15:14:26,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 275 transitions, 3205 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:26,038 INFO L231 Difference]: Finished difference. Result has 213 places, 253 transitions, 2745 flow [2024-06-20 15:14:26,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2745, PETRI_PLACES=213, PETRI_TRANSITIONS=253} [2024-06-20 15:14:26,038 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-20 15:14:26,038 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 253 transitions, 2745 flow [2024-06-20 15:14:26,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:26,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:26,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:26,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:14:26,039 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)] === [2024-06-20 15:14:26,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:26,039 INFO L85 PathProgramCache]: Analyzing trace with hash -368055421, now seen corresponding path program 7 times [2024-06-20 15:14:26,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:26,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209779539] [2024-06-20 15:14:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:26,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:26,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:26,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209779539] [2024-06-20 15:14:26,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209779539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:26,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:26,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:26,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749833494] [2024-06-20 15:14:26,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:26,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:26,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:26,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:26,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:26,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:26,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 253 transitions, 2745 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:26,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:26,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:26,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:26,512 INFO L124 PetriNetUnfolderBase]: 1515/2551 cut-off events. [2024-06-20 15:14:26,512 INFO L125 PetriNetUnfolderBase]: For 112391/112401 co-relation queries the response was YES. [2024-06-20 15:14:26,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16269 conditions, 2551 events. 1515/2551 cut-off events. For 112391/112401 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 14715 event pairs, 371 based on Foata normal form. 8/2557 useless extension candidates. Maximal degree in co-relation 16169. Up to 2180 conditions per place. [2024-06-20 15:14:26,535 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 186 selfloop transitions, 74 changer transitions 0/267 dead transitions. [2024-06-20 15:14:26,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 267 transitions, 3430 flow [2024-06-20 15:14:26,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:26,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 15:14:26,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:14:26,541 INFO L175 Difference]: Start difference. First operand has 213 places, 253 transitions, 2745 flow. Second operand 6 states and 138 transitions. [2024-06-20 15:14:26,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 267 transitions, 3430 flow [2024-06-20 15:14:26,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 267 transitions, 3301 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:26,811 INFO L231 Difference]: Finished difference. Result has 213 places, 256 transitions, 2811 flow [2024-06-20 15:14:26,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2811, PETRI_PLACES=213, PETRI_TRANSITIONS=256} [2024-06-20 15:14:26,812 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-20 15:14:26,812 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 256 transitions, 2811 flow [2024-06-20 15:14:26,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:26,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:26,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:26,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:14:26,820 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)] === [2024-06-20 15:14:26,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:26,821 INFO L85 PathProgramCache]: Analyzing trace with hash -379017517, now seen corresponding path program 10 times [2024-06-20 15:14:26,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:26,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206212315] [2024-06-20 15:14:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:26,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:26,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:26,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206212315] [2024-06-20 15:14:26,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206212315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:26,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:26,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:26,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206141811] [2024-06-20 15:14:26,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:26,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:26,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:26,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:26,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:27,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:27,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 256 transitions, 2811 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:27,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:27,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:27,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:27,358 INFO L124 PetriNetUnfolderBase]: 1512/2548 cut-off events. [2024-06-20 15:14:27,358 INFO L125 PetriNetUnfolderBase]: For 110827/110841 co-relation queries the response was YES. [2024-06-20 15:14:27,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16187 conditions, 2548 events. 1512/2548 cut-off events. For 110827/110841 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 14707 event pairs, 349 based on Foata normal form. 15/2562 useless extension candidates. Maximal degree in co-relation 16087. Up to 2140 conditions per place. [2024-06-20 15:14:27,382 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 196 selfloop transitions, 83 changer transitions 0/286 dead transitions. [2024-06-20 15:14:27,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 286 transitions, 3445 flow [2024-06-20 15:14:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:27,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:14:27,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-20 15:14:27,384 INFO L175 Difference]: Start difference. First operand has 213 places, 256 transitions, 2811 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:14:27,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 286 transitions, 3445 flow [2024-06-20 15:14:27,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 286 transitions, 3308 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:27,669 INFO L231 Difference]: Finished difference. Result has 218 places, 256 transitions, 2858 flow [2024-06-20 15:14:27,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2674, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2858, PETRI_PLACES=218, PETRI_TRANSITIONS=256} [2024-06-20 15:14:27,670 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-20 15:14:27,670 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 256 transitions, 2858 flow [2024-06-20 15:14:27,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:27,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:27,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:27,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:14:27,670 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)] === [2024-06-20 15:14:27,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:27,671 INFO L85 PathProgramCache]: Analyzing trace with hash -378780181, now seen corresponding path program 8 times [2024-06-20 15:14:27,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:27,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965114619] [2024-06-20 15:14:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:27,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:27,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:27,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965114619] [2024-06-20 15:14:27,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965114619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:27,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:27,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:27,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413480538] [2024-06-20 15:14:27,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:27,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:27,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:27,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:27,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:27,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:27,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 256 transitions, 2858 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:27,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:27,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:27,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:28,155 INFO L124 PetriNetUnfolderBase]: 1517/2557 cut-off events. [2024-06-20 15:14:28,155 INFO L125 PetriNetUnfolderBase]: For 115138/115152 co-relation queries the response was YES. [2024-06-20 15:14:28,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16391 conditions, 2557 events. 1517/2557 cut-off events. For 115138/115152 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14798 event pairs, 349 based on Foata normal form. 15/2571 useless extension candidates. Maximal degree in co-relation 16290. Up to 2182 conditions per place. [2024-06-20 15:14:28,180 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 189 selfloop transitions, 82 changer transitions 0/278 dead transitions. [2024-06-20 15:14:28,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 278 transitions, 3590 flow [2024-06-20 15:14:28,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:28,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:28,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-20 15:14:28,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-20 15:14:28,182 INFO L175 Difference]: Start difference. First operand has 218 places, 256 transitions, 2858 flow. Second operand 8 states and 181 transitions. [2024-06-20 15:14:28,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 278 transitions, 3590 flow [2024-06-20 15:14:28,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 278 transitions, 3408 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:28,416 INFO L231 Difference]: Finished difference. Result has 218 places, 259 transitions, 2898 flow [2024-06-20 15:14:28,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2682, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2898, PETRI_PLACES=218, PETRI_TRANSITIONS=259} [2024-06-20 15:14:28,416 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-20 15:14:28,416 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 259 transitions, 2898 flow [2024-06-20 15:14:28,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:28,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:28,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:28,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:14:28,417 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)] === [2024-06-20 15:14:28,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:28,417 INFO L85 PathProgramCache]: Analyzing trace with hash -379017331, now seen corresponding path program 9 times [2024-06-20 15:14:28,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:28,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188353421] [2024-06-20 15:14:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:28,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:28,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:28,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188353421] [2024-06-20 15:14:28,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188353421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:28,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:28,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:28,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572700533] [2024-06-20 15:14:28,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:28,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:28,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:28,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:28,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:28,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:28,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 259 transitions, 2898 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:28,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:28,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:28,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:28,941 INFO L124 PetriNetUnfolderBase]: 1514/2553 cut-off events. [2024-06-20 15:14:28,941 INFO L125 PetriNetUnfolderBase]: For 105977/105991 co-relation queries the response was YES. [2024-06-20 15:14:28,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16123 conditions, 2553 events. 1514/2553 cut-off events. For 105977/105991 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14767 event pairs, 349 based on Foata normal form. 15/2567 useless extension candidates. Maximal degree in co-relation 16022. Up to 2179 conditions per place. [2024-06-20 15:14:28,966 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 188 selfloop transitions, 86 changer transitions 0/281 dead transitions. [2024-06-20 15:14:28,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 281 transitions, 3500 flow [2024-06-20 15:14:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-20 15:14:28,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-20 15:14:28,967 INFO L175 Difference]: Start difference. First operand has 218 places, 259 transitions, 2898 flow. Second operand 9 states and 201 transitions. [2024-06-20 15:14:28,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 281 transitions, 3500 flow [2024-06-20 15:14:29,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 281 transitions, 3272 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:29,195 INFO L231 Difference]: Finished difference. Result has 220 places, 259 transitions, 2856 flow [2024-06-20 15:14:29,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2856, PETRI_PLACES=220, PETRI_TRANSITIONS=259} [2024-06-20 15:14:29,196 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-20 15:14:29,196 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 259 transitions, 2856 flow [2024-06-20 15:14:29,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:29,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:29,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:29,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:14:29,197 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)] === [2024-06-20 15:14:29,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:29,197 INFO L85 PathProgramCache]: Analyzing trace with hash -368058397, now seen corresponding path program 4 times [2024-06-20 15:14:29,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:29,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445820548] [2024-06-20 15:14:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:29,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:29,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:29,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445820548] [2024-06-20 15:14:29,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445820548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:29,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:29,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:29,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494964286] [2024-06-20 15:14:29,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:29,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:29,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:29,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:29,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:29,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 259 transitions, 2856 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:29,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:29,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:29,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:29,762 INFO L124 PetriNetUnfolderBase]: 1542/2592 cut-off events. [2024-06-20 15:14:29,762 INFO L125 PetriNetUnfolderBase]: For 114272/114276 co-relation queries the response was YES. [2024-06-20 15:14:29,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16329 conditions, 2592 events. 1542/2592 cut-off events. For 114272/114276 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 14975 event pairs, 341 based on Foata normal form. 9/2599 useless extension candidates. Maximal degree in co-relation 16228. Up to 2296 conditions per place. [2024-06-20 15:14:29,787 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 242 selfloop transitions, 27 changer transitions 0/276 dead transitions. [2024-06-20 15:14:29,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 276 transitions, 3477 flow [2024-06-20 15:14:29,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-20 15:14:29,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 15:14:29,788 INFO L175 Difference]: Start difference. First operand has 220 places, 259 transitions, 2856 flow. Second operand 6 states and 136 transitions. [2024-06-20 15:14:29,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 276 transitions, 3477 flow [2024-06-20 15:14:29,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 276 transitions, 3277 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:14:29,988 INFO L231 Difference]: Finished difference. Result has 216 places, 260 transitions, 2730 flow [2024-06-20 15:14:29,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2730, PETRI_PLACES=216, PETRI_TRANSITIONS=260} [2024-06-20 15:14:29,988 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-20 15:14:29,988 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 260 transitions, 2730 flow [2024-06-20 15:14:29,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:29,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:29,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:29,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:14:29,989 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)] === [2024-06-20 15:14:29,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:29,990 INFO L85 PathProgramCache]: Analyzing trace with hash -378783157, now seen corresponding path program 5 times [2024-06-20 15:14:29,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:29,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554735736] [2024-06-20 15:14:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:29,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:30,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:30,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554735736] [2024-06-20 15:14:30,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554735736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:30,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:30,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:30,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12664112] [2024-06-20 15:14:30,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:30,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:30,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:30,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:30,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:30,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:30,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 260 transitions, 2730 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:30,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:30,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:30,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:30,562 INFO L124 PetriNetUnfolderBase]: 1557/2624 cut-off events. [2024-06-20 15:14:30,562 INFO L125 PetriNetUnfolderBase]: For 107392/107400 co-relation queries the response was YES. [2024-06-20 15:14:30,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16198 conditions, 2624 events. 1557/2624 cut-off events. For 107392/107400 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15212 event pairs, 337 based on Foata normal form. 16/2639 useless extension candidates. Maximal degree in co-relation 16098. Up to 2289 conditions per place. [2024-06-20 15:14:30,584 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 248 selfloop transitions, 30 changer transitions 0/285 dead transitions. [2024-06-20 15:14:30,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 285 transitions, 3391 flow [2024-06-20 15:14:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:30,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-20 15:14:30,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-20 15:14:30,586 INFO L175 Difference]: Start difference. First operand has 216 places, 260 transitions, 2730 flow. Second operand 8 states and 177 transitions. [2024-06-20 15:14:30,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 285 transitions, 3391 flow [2024-06-20 15:14:30,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 285 transitions, 3334 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:30,787 INFO L231 Difference]: Finished difference. Result has 220 places, 261 transitions, 2758 flow [2024-06-20 15:14:30,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2758, PETRI_PLACES=220, PETRI_TRANSITIONS=261} [2024-06-20 15:14:30,788 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-20 15:14:30,788 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 261 transitions, 2758 flow [2024-06-20 15:14:30,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:30,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:30,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:30,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:14:30,789 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)] === [2024-06-20 15:14:30,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:30,789 INFO L85 PathProgramCache]: Analyzing trace with hash -379109587, now seen corresponding path program 6 times [2024-06-20 15:14:30,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:30,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134564955] [2024-06-20 15:14:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:30,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:30,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:30,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134564955] [2024-06-20 15:14:30,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134564955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:30,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:30,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:30,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422152977] [2024-06-20 15:14:30,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:30,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:30,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:30,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:30,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:30,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:30,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 261 transitions, 2758 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:30,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:30,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:30,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:31,337 INFO L124 PetriNetUnfolderBase]: 1544/2605 cut-off events. [2024-06-20 15:14:31,338 INFO L125 PetriNetUnfolderBase]: For 102056/102064 co-relation queries the response was YES. [2024-06-20 15:14:31,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15913 conditions, 2605 events. 1544/2605 cut-off events. For 102056/102064 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15112 event pairs, 245 based on Foata normal form. 14/2618 useless extension candidates. Maximal degree in co-relation 15812. Up to 2116 conditions per place. [2024-06-20 15:14:31,363 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 243 selfloop transitions, 41 changer transitions 0/291 dead transitions. [2024-06-20 15:14:31,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 291 transitions, 3444 flow [2024-06-20 15:14:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 15:14:31,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-20 15:14:31,365 INFO L175 Difference]: Start difference. First operand has 220 places, 261 transitions, 2758 flow. Second operand 8 states and 183 transitions. [2024-06-20 15:14:31,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 291 transitions, 3444 flow [2024-06-20 15:14:31,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 291 transitions, 3376 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:31,593 INFO L231 Difference]: Finished difference. Result has 222 places, 261 transitions, 2780 flow [2024-06-20 15:14:31,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2780, PETRI_PLACES=222, PETRI_TRANSITIONS=261} [2024-06-20 15:14:31,593 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-20 15:14:31,594 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 261 transitions, 2780 flow [2024-06-20 15:14:31,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:31,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:31,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:31,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:14:31,594 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)] === [2024-06-20 15:14:31,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:31,595 INFO L85 PathProgramCache]: Analyzing trace with hash -367658683, now seen corresponding path program 1 times [2024-06-20 15:14:31,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:31,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697076313] [2024-06-20 15:14:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:31,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:31,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:31,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697076313] [2024-06-20 15:14:31,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697076313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:31,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:31,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:31,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100606178] [2024-06-20 15:14:31,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:31,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:31,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:31,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:31,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:31,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:31,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 261 transitions, 2780 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:31,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:31,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:31,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:32,308 INFO L124 PetriNetUnfolderBase]: 1564/2634 cut-off events. [2024-06-20 15:14:32,309 INFO L125 PetriNetUnfolderBase]: For 102807/102811 co-relation queries the response was YES. [2024-06-20 15:14:32,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16113 conditions, 2634 events. 1564/2634 cut-off events. For 102807/102811 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 15239 event pairs, 335 based on Foata normal form. 7/2639 useless extension candidates. Maximal degree in co-relation 16011. Up to 2234 conditions per place. [2024-06-20 15:14:32,331 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 245 selfloop transitions, 32 changer transitions 0/284 dead transitions. [2024-06-20 15:14:32,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 284 transitions, 3456 flow [2024-06-20 15:14:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:32,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-20 15:14:32,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-20 15:14:32,333 INFO L175 Difference]: Start difference. First operand has 222 places, 261 transitions, 2780 flow. Second operand 6 states and 139 transitions. [2024-06-20 15:14:32,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 284 transitions, 3456 flow [2024-06-20 15:14:32,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 284 transitions, 3368 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:32,561 INFO L231 Difference]: Finished difference. Result has 222 places, 265 transitions, 2812 flow [2024-06-20 15:14:32,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2812, PETRI_PLACES=222, PETRI_TRANSITIONS=265} [2024-06-20 15:14:32,561 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-20 15:14:32,562 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 265 transitions, 2812 flow [2024-06-20 15:14:32,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:32,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:32,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:32,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:14:32,562 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)] === [2024-06-20 15:14:32,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:32,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1449083601, now seen corresponding path program 4 times [2024-06-20 15:14:32,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:32,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403425695] [2024-06-20 15:14:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:32,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:32,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:32,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403425695] [2024-06-20 15:14:32,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403425695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:32,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:32,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:32,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164892405] [2024-06-20 15:14:32,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:32,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:32,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:32,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:32,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:32,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:32,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 265 transitions, 2812 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:32,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:32,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:32,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:33,113 INFO L124 PetriNetUnfolderBase]: 1569/2648 cut-off events. [2024-06-20 15:14:33,113 INFO L125 PetriNetUnfolderBase]: For 93756/93770 co-relation queries the response was YES. [2024-06-20 15:14:33,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16139 conditions, 2648 events. 1569/2648 cut-off events. For 93756/93770 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 15454 event pairs, 361 based on Foata normal form. 15/2662 useless extension candidates. Maximal degree in co-relation 16036. Up to 2271 conditions per place. [2024-06-20 15:14:33,141 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 214 selfloop transitions, 65 changer transitions 0/286 dead transitions. [2024-06-20 15:14:33,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 286 transitions, 3610 flow [2024-06-20 15:14:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 15:14:33,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 15:14:33,143 INFO L175 Difference]: Start difference. First operand has 222 places, 265 transitions, 2812 flow. Second operand 7 states and 160 transitions. [2024-06-20 15:14:33,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 286 transitions, 3610 flow [2024-06-20 15:14:33,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 286 transitions, 3571 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:33,385 INFO L231 Difference]: Finished difference. Result has 227 places, 271 transitions, 3023 flow [2024-06-20 15:14:33,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3023, PETRI_PLACES=227, PETRI_TRANSITIONS=271} [2024-06-20 15:14:33,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-20 15:14:33,386 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 271 transitions, 3023 flow [2024-06-20 15:14:33,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:33,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:33,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:33,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:14:33,387 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)] === [2024-06-20 15:14:33,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:33,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1111954481, now seen corresponding path program 5 times [2024-06-20 15:14:33,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:33,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093691155] [2024-06-20 15:14:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:33,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:33,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:33,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093691155] [2024-06-20 15:14:33,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093691155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:33,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:33,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:33,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396197473] [2024-06-20 15:14:33,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:33,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:33,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:33,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:33,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:33,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:33,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 271 transitions, 3023 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:33,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:33,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:33,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:33,967 INFO L124 PetriNetUnfolderBase]: 1566/2646 cut-off events. [2024-06-20 15:14:33,967 INFO L125 PetriNetUnfolderBase]: For 97261/97275 co-relation queries the response was YES. [2024-06-20 15:14:33,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16450 conditions, 2646 events. 1566/2646 cut-off events. For 97261/97275 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 15423 event pairs, 357 based on Foata normal form. 15/2660 useless extension candidates. Maximal degree in co-relation 16345. Up to 2331 conditions per place. [2024-06-20 15:14:33,993 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 247 selfloop transitions, 33 changer transitions 0/287 dead transitions. [2024-06-20 15:14:33,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 287 transitions, 3623 flow [2024-06-20 15:14:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 15:14:33,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:14:33,994 INFO L175 Difference]: Start difference. First operand has 227 places, 271 transitions, 3023 flow. Second operand 6 states and 141 transitions. [2024-06-20 15:14:33,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 287 transitions, 3623 flow [2024-06-20 15:14:34,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 287 transitions, 3503 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:34,248 INFO L231 Difference]: Finished difference. Result has 230 places, 271 transitions, 2975 flow [2024-06-20 15:14:34,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2975, PETRI_PLACES=230, PETRI_TRANSITIONS=271} [2024-06-20 15:14:34,249 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-20 15:14:34,249 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 271 transitions, 2975 flow [2024-06-20 15:14:34,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:34,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:34,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:34,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:14:34,250 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)] === [2024-06-20 15:14:34,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:34,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1112370191, now seen corresponding path program 6 times [2024-06-20 15:14:34,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:34,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208292511] [2024-06-20 15:14:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:34,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:34,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:34,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208292511] [2024-06-20 15:14:34,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208292511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:34,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:34,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:34,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373902044] [2024-06-20 15:14:34,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:34,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:34,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:34,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:34,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:34,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:34,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 271 transitions, 2975 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:34,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:34,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:34,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:34,874 INFO L124 PetriNetUnfolderBase]: 1571/2651 cut-off events. [2024-06-20 15:14:34,874 INFO L125 PetriNetUnfolderBase]: For 99431/99443 co-relation queries the response was YES. [2024-06-20 15:14:34,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16393 conditions, 2651 events. 1571/2651 cut-off events. For 99431/99443 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 15464 event pairs, 361 based on Foata normal form. 13/2663 useless extension candidates. Maximal degree in co-relation 16286. Up to 2293 conditions per place. [2024-06-20 15:14:34,910 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 223 selfloop transitions, 58 changer transitions 0/288 dead transitions. [2024-06-20 15:14:34,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 288 transitions, 3727 flow [2024-06-20 15:14:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 15:14:34,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:14:34,912 INFO L175 Difference]: Start difference. First operand has 230 places, 271 transitions, 2975 flow. Second operand 6 states and 141 transitions. [2024-06-20 15:14:34,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 288 transitions, 3727 flow [2024-06-20 15:14:35,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 288 transitions, 3555 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:35,329 INFO L231 Difference]: Finished difference. Result has 229 places, 274 transitions, 2981 flow [2024-06-20 15:14:35,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2803, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2981, PETRI_PLACES=229, PETRI_TRANSITIONS=274} [2024-06-20 15:14:35,332 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-20 15:14:35,332 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 274 transitions, 2981 flow [2024-06-20 15:14:35,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:35,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:35,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:35,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:14:35,333 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)] === [2024-06-20 15:14:35,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:35,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1117495235, now seen corresponding path program 10 times [2024-06-20 15:14:35,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:35,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210549092] [2024-06-20 15:14:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:35,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:35,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:35,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210549092] [2024-06-20 15:14:35,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210549092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:35,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:35,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:35,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755051703] [2024-06-20 15:14:35,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:35,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:35,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:35,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:35,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:35,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:35,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 274 transitions, 2981 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:35,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:35,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:35,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:35,919 INFO L124 PetriNetUnfolderBase]: 1576/2658 cut-off events. [2024-06-20 15:14:35,919 INFO L125 PetriNetUnfolderBase]: For 102895/102907 co-relation queries the response was YES. [2024-06-20 15:14:35,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16400 conditions, 2658 events. 1576/2658 cut-off events. For 102895/102907 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15505 event pairs, 355 based on Foata normal form. 13/2670 useless extension candidates. Maximal degree in co-relation 16294. Up to 2300 conditions per place. [2024-06-20 15:14:35,948 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 220 selfloop transitions, 68 changer transitions 0/295 dead transitions. [2024-06-20 15:14:35,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 295 transitions, 3655 flow [2024-06-20 15:14:35,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-20 15:14:35,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-20 15:14:35,949 INFO L175 Difference]: Start difference. First operand has 229 places, 274 transitions, 2981 flow. Second operand 8 states and 181 transitions. [2024-06-20 15:14:35,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 295 transitions, 3655 flow [2024-06-20 15:14:36,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 295 transitions, 3491 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:36,247 INFO L231 Difference]: Finished difference. Result has 233 places, 277 transitions, 3023 flow [2024-06-20 15:14:36,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3023, PETRI_PLACES=233, PETRI_TRANSITIONS=277} [2024-06-20 15:14:36,248 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-20 15:14:36,248 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 277 transitions, 3023 flow [2024-06-20 15:14:36,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:36,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:36,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:36,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:14:36,249 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)] === [2024-06-20 15:14:36,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:36,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1117495421, now seen corresponding path program 7 times [2024-06-20 15:14:36,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:36,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417582998] [2024-06-20 15:14:36,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:36,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:36,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:36,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417582998] [2024-06-20 15:14:36,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417582998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:36,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:36,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:36,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857974453] [2024-06-20 15:14:36,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:36,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:36,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:36,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:36,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:36,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:36,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 277 transitions, 3023 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:36,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:36,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:36,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:36,858 INFO L124 PetriNetUnfolderBase]: 1581/2669 cut-off events. [2024-06-20 15:14:36,858 INFO L125 PetriNetUnfolderBase]: For 106634/106646 co-relation queries the response was YES. [2024-06-20 15:14:36,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16734 conditions, 2669 events. 1581/2669 cut-off events. For 106634/106646 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15586 event pairs, 357 based on Foata normal form. 13/2681 useless extension candidates. Maximal degree in co-relation 16627. Up to 2306 conditions per place. [2024-06-20 15:14:36,884 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 222 selfloop transitions, 68 changer transitions 0/297 dead transitions. [2024-06-20 15:14:36,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 297 transitions, 3803 flow [2024-06-20 15:14:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:14:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:14:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-20 15:14:36,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-20 15:14:36,886 INFO L175 Difference]: Start difference. First operand has 233 places, 277 transitions, 3023 flow. Second operand 9 states and 196 transitions. [2024-06-20 15:14:36,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 297 transitions, 3803 flow [2024-06-20 15:14:37,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 297 transitions, 3631 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:37,263 INFO L231 Difference]: Finished difference. Result has 236 places, 280 transitions, 3049 flow [2024-06-20 15:14:37,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2851, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3049, PETRI_PLACES=236, PETRI_TRANSITIONS=280} [2024-06-20 15:14:37,263 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-20 15:14:37,263 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 280 transitions, 3049 flow [2024-06-20 15:14:37,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:37,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:37,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:37,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:14:37,264 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)] === [2024-06-20 15:14:37,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:37,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1117732571, now seen corresponding path program 8 times [2024-06-20 15:14:37,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:37,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910865117] [2024-06-20 15:14:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:37,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:37,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:37,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910865117] [2024-06-20 15:14:37,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910865117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:37,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:37,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:37,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065929749] [2024-06-20 15:14:37,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:37,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:37,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:37,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:37,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:37,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:37,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 280 transitions, 3049 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:37,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:37,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:37,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:37,789 INFO L124 PetriNetUnfolderBase]: 1578/2665 cut-off events. [2024-06-20 15:14:37,789 INFO L125 PetriNetUnfolderBase]: For 108576/108588 co-relation queries the response was YES. [2024-06-20 15:14:37,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16684 conditions, 2665 events. 1578/2665 cut-off events. For 108576/108588 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15568 event pairs, 357 based on Foata normal form. 13/2677 useless extension candidates. Maximal degree in co-relation 16576. Up to 2303 conditions per place. [2024-06-20 15:14:37,817 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 223 selfloop transitions, 65 changer transitions 0/295 dead transitions. [2024-06-20 15:14:37,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 295 transitions, 3661 flow [2024-06-20 15:14:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:37,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-20 15:14:37,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-20 15:14:37,818 INFO L175 Difference]: Start difference. First operand has 236 places, 280 transitions, 3049 flow. Second operand 8 states and 177 transitions. [2024-06-20 15:14:37,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 295 transitions, 3661 flow [2024-06-20 15:14:38,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 295 transitions, 3402 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:38,186 INFO L231 Difference]: Finished difference. Result has 237 places, 280 transitions, 2926 flow [2024-06-20 15:14:38,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2926, PETRI_PLACES=237, PETRI_TRANSITIONS=280} [2024-06-20 15:14:38,187 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-20 15:14:38,187 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 280 transitions, 2926 flow [2024-06-20 15:14:38,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:38,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:38,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:38,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:14:38,187 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)] === [2024-06-20 15:14:38,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:38,188 INFO L85 PathProgramCache]: Analyzing trace with hash 553585411, now seen corresponding path program 11 times [2024-06-20 15:14:38,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:38,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258582010] [2024-06-20 15:14:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:38,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:38,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:38,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258582010] [2024-06-20 15:14:38,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258582010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:38,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:38,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:38,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481004142] [2024-06-20 15:14:38,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:38,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:38,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:38,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:38,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:38,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:38,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 280 transitions, 2926 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:38,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:38,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:38,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:38,711 INFO L124 PetriNetUnfolderBase]: 1575/2654 cut-off events. [2024-06-20 15:14:38,712 INFO L125 PetriNetUnfolderBase]: For 110661/110669 co-relation queries the response was YES. [2024-06-20 15:14:38,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16458 conditions, 2654 events. 1575/2654 cut-off events. For 110661/110669 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15449 event pairs, 377 based on Foata normal form. 6/2658 useless extension candidates. Maximal degree in co-relation 16350. Up to 2260 conditions per place. [2024-06-20 15:14:38,740 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 199 selfloop transitions, 88 changer transitions 0/294 dead transitions. [2024-06-20 15:14:38,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 294 transitions, 3586 flow [2024-06-20 15:14:38,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:38,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-20 15:14:38,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-20 15:14:38,742 INFO L175 Difference]: Start difference. First operand has 237 places, 280 transitions, 2926 flow. Second operand 7 states and 156 transitions. [2024-06-20 15:14:38,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 294 transitions, 3586 flow [2024-06-20 15:14:39,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 294 transitions, 3408 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:39,025 INFO L231 Difference]: Finished difference. Result has 236 places, 283 transitions, 2996 flow [2024-06-20 15:14:39,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2996, PETRI_PLACES=236, PETRI_TRANSITIONS=283} [2024-06-20 15:14:39,026 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-20 15:14:39,026 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 283 transitions, 2996 flow [2024-06-20 15:14:39,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:39,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:39,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:39,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:14:39,026 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)] === [2024-06-20 15:14:39,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:39,027 INFO L85 PathProgramCache]: Analyzing trace with hash 553582435, now seen corresponding path program 7 times [2024-06-20 15:14:39,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:39,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746559941] [2024-06-20 15:14:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:39,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:39,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:39,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746559941] [2024-06-20 15:14:39,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746559941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:39,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:39,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:39,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24825390] [2024-06-20 15:14:39,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:39,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:39,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:39,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:39,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:39,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:39,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 283 transitions, 2996 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:39,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:39,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:39,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:39,576 INFO L124 PetriNetUnfolderBase]: 1590/2681 cut-off events. [2024-06-20 15:14:39,577 INFO L125 PetriNetUnfolderBase]: For 117900/117904 co-relation queries the response was YES. [2024-06-20 15:14:39,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16513 conditions, 2681 events. 1590/2681 cut-off events. For 117900/117904 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 15621 event pairs, 348 based on Foata normal form. 9/2688 useless extension candidates. Maximal degree in co-relation 16404. Up to 2369 conditions per place. [2024-06-20 15:14:39,601 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 262 selfloop transitions, 32 changer transitions 0/301 dead transitions. [2024-06-20 15:14:39,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 301 transitions, 3672 flow [2024-06-20 15:14:39,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-20 15:14:39,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:14:39,603 INFO L175 Difference]: Start difference. First operand has 236 places, 283 transitions, 2996 flow. Second operand 7 states and 154 transitions. [2024-06-20 15:14:39,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 301 transitions, 3672 flow [2024-06-20 15:14:39,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 301 transitions, 3450 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:39,867 INFO L231 Difference]: Finished difference. Result has 238 places, 284 transitions, 2857 flow [2024-06-20 15:14:39,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2857, PETRI_PLACES=238, PETRI_TRANSITIONS=284} [2024-06-20 15:14:39,868 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-20 15:14:39,868 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 284 transitions, 2857 flow [2024-06-20 15:14:39,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:39,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:39,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:39,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:14:39,869 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)] === [2024-06-20 15:14:39,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:39,869 INFO L85 PathProgramCache]: Analyzing trace with hash 553982149, now seen corresponding path program 2 times [2024-06-20 15:14:39,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:39,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978525726] [2024-06-20 15:14:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:39,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:40,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:40,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978525726] [2024-06-20 15:14:40,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978525726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:40,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:40,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:40,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657267154] [2024-06-20 15:14:40,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:40,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:40,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:40,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:40,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:40,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:40,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 284 transitions, 2857 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:40,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:40,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:40,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:40,429 INFO L124 PetriNetUnfolderBase]: 1610/2717 cut-off events. [2024-06-20 15:14:40,430 INFO L125 PetriNetUnfolderBase]: For 118800/118804 co-relation queries the response was YES. [2024-06-20 15:14:40,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16646 conditions, 2717 events. 1610/2717 cut-off events. For 118800/118804 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15899 event pairs, 348 based on Foata normal form. 7/2722 useless extension candidates. Maximal degree in co-relation 16536. Up to 2371 conditions per place. [2024-06-20 15:14:40,457 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 266 selfloop transitions, 34 changer transitions 0/307 dead transitions. [2024-06-20 15:14:40,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 307 transitions, 3587 flow [2024-06-20 15:14:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:40,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:40,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-20 15:14:40,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-20 15:14:40,458 INFO L175 Difference]: Start difference. First operand has 238 places, 284 transitions, 2857 flow. Second operand 7 states and 157 transitions. [2024-06-20 15:14:40,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 307 transitions, 3587 flow [2024-06-20 15:14:40,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 307 transitions, 3518 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:40,812 INFO L231 Difference]: Finished difference. Result has 241 places, 287 transitions, 2902 flow [2024-06-20 15:14:40,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2902, PETRI_PLACES=241, PETRI_TRANSITIONS=287} [2024-06-20 15:14:40,813 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-20 15:14:40,813 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 287 transitions, 2902 flow [2024-06-20 15:14:40,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:40,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:40,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:40,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:14:40,814 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)] === [2024-06-20 15:14:40,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:40,814 INFO L85 PathProgramCache]: Analyzing trace with hash 996810949, now seen corresponding path program 3 times [2024-06-20 15:14:40,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:40,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375501126] [2024-06-20 15:14:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:40,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:40,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:40,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375501126] [2024-06-20 15:14:40,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375501126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:40,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:40,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:40,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371758793] [2024-06-20 15:14:40,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:40,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:40,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:40,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:40,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:41,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:41,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 287 transitions, 2902 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:41,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:41,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:41,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:41,376 INFO L124 PetriNetUnfolderBase]: 1597/2698 cut-off events. [2024-06-20 15:14:41,376 INFO L125 PetriNetUnfolderBase]: For 113402/113406 co-relation queries the response was YES. [2024-06-20 15:14:41,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16301 conditions, 2698 events. 1597/2698 cut-off events. For 113402/113406 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15726 event pairs, 339 based on Foata normal form. 7/2703 useless extension candidates. Maximal degree in co-relation 16189. Up to 2188 conditions per place. [2024-06-20 15:14:41,407 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 262 selfloop transitions, 41 changer transitions 0/310 dead transitions. [2024-06-20 15:14:41,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 310 transitions, 3628 flow [2024-06-20 15:14:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-20 15:14:41,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-20 15:14:41,409 INFO L175 Difference]: Start difference. First operand has 241 places, 287 transitions, 2902 flow. Second operand 7 states and 157 transitions. [2024-06-20 15:14:41,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 310 transitions, 3628 flow [2024-06-20 15:14:41,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 310 transitions, 3546 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:41,821 INFO L231 Difference]: Finished difference. Result has 245 places, 289 transitions, 2931 flow [2024-06-20 15:14:41,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2822, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2931, PETRI_PLACES=245, PETRI_TRANSITIONS=289} [2024-06-20 15:14:41,821 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-20 15:14:41,822 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 289 transitions, 2931 flow [2024-06-20 15:14:41,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:41,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:41,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:41,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:14:41,822 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)] === [2024-06-20 15:14:41,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:41,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1537788303, now seen corresponding path program 1 times [2024-06-20 15:14:41,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:41,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437199168] [2024-06-20 15:14:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:41,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:41,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:41,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437199168] [2024-06-20 15:14:41,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437199168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:41,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:41,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:41,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508728581] [2024-06-20 15:14:41,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:41,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:41,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:41,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:41,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:42,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:42,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 289 transitions, 2931 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:42,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:42,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:42,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:42,409 INFO L124 PetriNetUnfolderBase]: 1650/2787 cut-off events. [2024-06-20 15:14:42,409 INFO L125 PetriNetUnfolderBase]: For 126647/126651 co-relation queries the response was YES. [2024-06-20 15:14:42,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17058 conditions, 2787 events. 1650/2787 cut-off events. For 126647/126651 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 16396 event pairs, 346 based on Foata normal form. 10/2796 useless extension candidates. Maximal degree in co-relation 16944. Up to 2385 conditions per place. [2024-06-20 15:14:42,437 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 290 selfloop transitions, 28 changer transitions 0/325 dead transitions. [2024-06-20 15:14:42,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 325 transitions, 3851 flow [2024-06-20 15:14:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 15:14:42,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-20 15:14:42,438 INFO L175 Difference]: Start difference. First operand has 245 places, 289 transitions, 2931 flow. Second operand 7 states and 164 transitions. [2024-06-20 15:14:42,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 325 transitions, 3851 flow [2024-06-20 15:14:42,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 325 transitions, 3700 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:42,731 INFO L231 Difference]: Finished difference. Result has 248 places, 294 transitions, 2899 flow [2024-06-20 15:14:42,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2899, PETRI_PLACES=248, PETRI_TRANSITIONS=294} [2024-06-20 15:14:42,732 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-20 15:14:42,732 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 294 transitions, 2899 flow [2024-06-20 15:14:42,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:42,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:42,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:42,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:14:42,733 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)] === [2024-06-20 15:14:42,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:42,733 INFO L85 PathProgramCache]: Analyzing trace with hash -568477521, now seen corresponding path program 2 times [2024-06-20 15:14:42,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:42,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838088428] [2024-06-20 15:14:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:42,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:42,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:42,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838088428] [2024-06-20 15:14:42,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838088428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:42,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:42,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:42,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852465988] [2024-06-20 15:14:42,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:42,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:42,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:42,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:42,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:42,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:42,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 294 transitions, 2899 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:42,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:42,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:42,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:43,333 INFO L124 PetriNetUnfolderBase]: 1678/2835 cut-off events. [2024-06-20 15:14:43,334 INFO L125 PetriNetUnfolderBase]: For 133770/133774 co-relation queries the response was YES. [2024-06-20 15:14:43,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17069 conditions, 2835 events. 1678/2835 cut-off events. For 133770/133774 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16741 event pairs, 360 based on Foata normal form. 12/2846 useless extension candidates. Maximal degree in co-relation 16954. Up to 2525 conditions per place. [2024-06-20 15:14:43,366 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 283 selfloop transitions, 26 changer transitions 0/316 dead transitions. [2024-06-20 15:14:43,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 316 transitions, 3613 flow [2024-06-20 15:14:43,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-20 15:14:43,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-20 15:14:43,367 INFO L175 Difference]: Start difference. First operand has 248 places, 294 transitions, 2899 flow. Second operand 7 states and 157 transitions. [2024-06-20 15:14:43,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 316 transitions, 3613 flow [2024-06-20 15:14:43,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 316 transitions, 3581 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 15:14:43,766 INFO L231 Difference]: Finished difference. Result has 253 places, 295 transitions, 2935 flow [2024-06-20 15:14:43,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2867, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2935, PETRI_PLACES=253, PETRI_TRANSITIONS=295} [2024-06-20 15:14:43,767 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-20 15:14:43,767 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 295 transitions, 2935 flow [2024-06-20 15:14:43,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:43,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:43,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:43,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:14:43,768 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)] === [2024-06-20 15:14:43,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash -568625391, now seen corresponding path program 3 times [2024-06-20 15:14:43,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:43,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132668625] [2024-06-20 15:14:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:43,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:43,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:43,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132668625] [2024-06-20 15:14:43,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132668625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:43,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:43,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:43,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193127418] [2024-06-20 15:14:43,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:43,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:43,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:43,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:43,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:43,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:43,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 295 transitions, 2935 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:43,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:43,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:43,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:44,436 INFO L124 PetriNetUnfolderBase]: 1698/2867 cut-off events. [2024-06-20 15:14:44,436 INFO L125 PetriNetUnfolderBase]: For 135209/135213 co-relation queries the response was YES. [2024-06-20 15:14:44,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17411 conditions, 2867 events. 1698/2867 cut-off events. For 135209/135213 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 17034 event pairs, 358 based on Foata normal form. 10/2876 useless extension candidates. Maximal degree in co-relation 17294. Up to 2527 conditions per place. [2024-06-20 15:14:44,470 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 287 selfloop transitions, 28 changer transitions 0/322 dead transitions. [2024-06-20 15:14:44,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 322 transitions, 3701 flow [2024-06-20 15:14:44,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:14:44,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:14:44,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 15:14:44,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 15:14:44,471 INFO L175 Difference]: Start difference. First operand has 253 places, 295 transitions, 2935 flow. Second operand 7 states and 160 transitions. [2024-06-20 15:14:44,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 322 transitions, 3701 flow [2024-06-20 15:14:44,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 322 transitions, 3650 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:44,832 INFO L231 Difference]: Finished difference. Result has 256 places, 298 transitions, 2981 flow [2024-06-20 15:14:44,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2884, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2981, PETRI_PLACES=256, PETRI_TRANSITIONS=298} [2024-06-20 15:14:44,833 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-20 15:14:44,833 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 298 transitions, 2981 flow [2024-06-20 15:14:44,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:44,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:44,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:44,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:14:44,834 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)] === [2024-06-20 15:14:44,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:44,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1117741499, now seen corresponding path program 4 times [2024-06-20 15:14:44,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:44,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014522050] [2024-06-20 15:14:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:44,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:44,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:44,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014522050] [2024-06-20 15:14:44,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014522050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:44,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:44,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:44,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253691658] [2024-06-20 15:14:44,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:44,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:44,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:44,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:44,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:45,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:45,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 298 transitions, 2981 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:45,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:45,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:45,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:45,469 INFO L124 PetriNetUnfolderBase]: 1726/2911 cut-off events. [2024-06-20 15:14:45,469 INFO L125 PetriNetUnfolderBase]: For 143936/143940 co-relation queries the response was YES. [2024-06-20 15:14:45,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17802 conditions, 2911 events. 1726/2911 cut-off events. For 143936/143940 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 17311 event pairs, 366 based on Foata normal form. 12/2922 useless extension candidates. Maximal degree in co-relation 17683. Up to 2607 conditions per place. [2024-06-20 15:14:45,502 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 291 selfloop transitions, 23 changer transitions 0/321 dead transitions. [2024-06-20 15:14:45,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 321 transitions, 3711 flow [2024-06-20 15:14:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-20 15:14:45,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-20 15:14:45,504 INFO L175 Difference]: Start difference. First operand has 256 places, 298 transitions, 2981 flow. Second operand 8 states and 174 transitions. [2024-06-20 15:14:45,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 321 transitions, 3711 flow [2024-06-20 15:14:45,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 321 transitions, 3677 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 15:14:45,891 INFO L231 Difference]: Finished difference. Result has 261 places, 299 transitions, 3013 flow [2024-06-20 15:14:45,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3013, PETRI_PLACES=261, PETRI_TRANSITIONS=299} [2024-06-20 15:14:45,891 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-20 15:14:45,891 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 299 transitions, 3013 flow [2024-06-20 15:14:45,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:45,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:45,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:45,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:14:45,892 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)] === [2024-06-20 15:14:45,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:45,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1112234969, now seen corresponding path program 5 times [2024-06-20 15:14:45,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:45,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128030129] [2024-06-20 15:14:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:45,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:46,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:46,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128030129] [2024-06-20 15:14:46,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128030129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:46,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:46,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:46,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164160207] [2024-06-20 15:14:46,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:46,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:46,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:46,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:46,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:46,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:46,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 299 transitions, 3013 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:46,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:46,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:46,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:46,537 INFO L124 PetriNetUnfolderBase]: 1741/2940 cut-off events. [2024-06-20 15:14:46,537 INFO L125 PetriNetUnfolderBase]: For 144159/144163 co-relation queries the response was YES. [2024-06-20 15:14:46,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17990 conditions, 2940 events. 1741/2940 cut-off events. For 144159/144163 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 17515 event pairs, 373 based on Foata normal form. 12/2951 useless extension candidates. Maximal degree in co-relation 17869. Up to 2632 conditions per place. [2024-06-20 15:14:46,569 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 292 selfloop transitions, 21 changer transitions 0/320 dead transitions. [2024-06-20 15:14:46,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 320 transitions, 3739 flow [2024-06-20 15:14:46,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:46,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:46,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-20 15:14:46,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-20 15:14:46,571 INFO L175 Difference]: Start difference. First operand has 261 places, 299 transitions, 3013 flow. Second operand 6 states and 139 transitions. [2024-06-20 15:14:46,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 320 transitions, 3739 flow [2024-06-20 15:14:47,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 320 transitions, 3690 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:14:47,021 INFO L231 Difference]: Finished difference. Result has 261 places, 300 transitions, 3028 flow [2024-06-20 15:14:47,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2964, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3028, PETRI_PLACES=261, PETRI_TRANSITIONS=300} [2024-06-20 15:14:47,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-20 15:14:47,022 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 300 transitions, 3028 flow [2024-06-20 15:14:47,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:47,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:47,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:47,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:14:47,022 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)] === [2024-06-20 15:14:47,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1112231249, now seen corresponding path program 6 times [2024-06-20 15:14:47,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:47,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616745314] [2024-06-20 15:14:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:47,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:47,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:47,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616745314] [2024-06-20 15:14:47,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616745314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:47,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:47,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:47,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226732509] [2024-06-20 15:14:47,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:47,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:47,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:47,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:47,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:47,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:47,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 300 transitions, 3028 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:47,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:47,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:47,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:47,653 INFO L124 PetriNetUnfolderBase]: 1728/2921 cut-off events. [2024-06-20 15:14:47,653 INFO L125 PetriNetUnfolderBase]: For 133425/133429 co-relation queries the response was YES. [2024-06-20 15:14:47,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17580 conditions, 2921 events. 1728/2921 cut-off events. For 133425/133429 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 17374 event pairs, 352 based on Foata normal form. 10/2930 useless extension candidates. Maximal degree in co-relation 17458. Up to 2533 conditions per place. [2024-06-20 15:14:47,684 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 296 selfloop transitions, 25 changer transitions 0/328 dead transitions. [2024-06-20 15:14:47,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 328 transitions, 3807 flow [2024-06-20 15:14:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:14:47,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:14:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 15:14:47,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-20 15:14:47,685 INFO L175 Difference]: Start difference. First operand has 261 places, 300 transitions, 3028 flow. Second operand 6 states and 145 transitions. [2024-06-20 15:14:47,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 328 transitions, 3807 flow [2024-06-20 15:14:48,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 328 transitions, 3756 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:48,026 INFO L231 Difference]: Finished difference. Result has 264 places, 302 transitions, 3066 flow [2024-06-20 15:14:48,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3066, PETRI_PLACES=264, PETRI_TRANSITIONS=302} [2024-06-20 15:14:48,026 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-20 15:14:48,026 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 302 transitions, 3066 flow [2024-06-20 15:14:48,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:48,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:48,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:48,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:14:48,027 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)] === [2024-06-20 15:14:48,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:48,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1117956701, now seen corresponding path program 1 times [2024-06-20 15:14:48,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:48,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880574422] [2024-06-20 15:14:48,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:48,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:48,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:48,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880574422] [2024-06-20 15:14:48,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880574422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:48,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:48,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:14:48,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725746662] [2024-06-20 15:14:48,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:48,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:14:48,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:48,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:14:48,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:14:48,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:48,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 302 transitions, 3066 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:48,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:48,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:48,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:48,667 INFO L124 PetriNetUnfolderBase]: 1715/2894 cut-off events. [2024-06-20 15:14:48,668 INFO L125 PetriNetUnfolderBase]: For 125423/125427 co-relation queries the response was YES. [2024-06-20 15:14:48,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17217 conditions, 2894 events. 1715/2894 cut-off events. For 125423/125427 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 17179 event pairs, 341 based on Foata normal form. 10/2903 useless extension candidates. Maximal degree in co-relation 17093. Up to 2522 conditions per place. [2024-06-20 15:14:48,700 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 293 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2024-06-20 15:14:48,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 328 transitions, 3823 flow [2024-06-20 15:14:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-20 15:14:48,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-20 15:14:48,702 INFO L175 Difference]: Start difference. First operand has 264 places, 302 transitions, 3066 flow. Second operand 8 states and 177 transitions. [2024-06-20 15:14:48,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 328 transitions, 3823 flow [2024-06-20 15:14:49,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 328 transitions, 3737 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 15:14:49,133 INFO L231 Difference]: Finished difference. Result has 267 places, 302 transitions, 3040 flow [2024-06-20 15:14:49,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3040, PETRI_PLACES=267, PETRI_TRANSITIONS=302} [2024-06-20 15:14:49,133 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-20 15:14:49,134 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 302 transitions, 3040 flow [2024-06-20 15:14:49,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:49,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:49,134 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] [2024-06-20 15:14:49,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:14:49,134 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)] === [2024-06-20 15:14:49,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:49,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2066324371, now seen corresponding path program 1 times [2024-06-20 15:14:49,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:49,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469696867] [2024-06-20 15:14:49,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:49,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:49,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:49,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469696867] [2024-06-20 15:14:49,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469696867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:49,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:49,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:14:49,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244641074] [2024-06-20 15:14:49,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:49,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:14:49,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:49,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:14:49,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:14:49,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:49,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 302 transitions, 3040 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:49,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:49,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:49,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:49,830 INFO L124 PetriNetUnfolderBase]: 1736/2931 cut-off events. [2024-06-20 15:14:49,831 INFO L125 PetriNetUnfolderBase]: For 123274/123282 co-relation queries the response was YES. [2024-06-20 15:14:49,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17481 conditions, 2931 events. 1736/2931 cut-off events. For 123274/123282 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 17487 event pairs, 397 based on Foata normal form. 9/2938 useless extension candidates. Maximal degree in co-relation 17357. Up to 2352 conditions per place. [2024-06-20 15:14:49,860 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 175 selfloop transitions, 159 changer transitions 0/341 dead transitions. [2024-06-20 15:14:49,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 341 transitions, 4186 flow [2024-06-20 15:14:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:14:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:14:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 265 transitions. [2024-06-20 15:14:49,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-06-20 15:14:49,861 INFO L175 Difference]: Start difference. First operand has 267 places, 302 transitions, 3040 flow. Second operand 12 states and 265 transitions. [2024-06-20 15:14:49,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 341 transitions, 4186 flow [2024-06-20 15:14:50,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 341 transitions, 4108 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:50,333 INFO L231 Difference]: Finished difference. Result has 272 places, 311 transitions, 3442 flow [2024-06-20 15:14:50,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2962, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3442, PETRI_PLACES=272, PETRI_TRANSITIONS=311} [2024-06-20 15:14:50,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-20 15:14:50,334 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 311 transitions, 3442 flow [2024-06-20 15:14:50,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:50,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:50,334 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] [2024-06-20 15:14:50,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:14:50,334 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)] === [2024-06-20 15:14:50,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:50,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1972116713, now seen corresponding path program 2 times [2024-06-20 15:14:50,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:50,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153027410] [2024-06-20 15:14:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:50,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:50,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:50,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153027410] [2024-06-20 15:14:50,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153027410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:50,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:50,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:14:50,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992973348] [2024-06-20 15:14:50,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:50,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:14:50,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:50,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:14:50,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:14:50,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:50,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 311 transitions, 3442 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:50,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:50,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:50,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:51,074 INFO L124 PetriNetUnfolderBase]: 1749/2954 cut-off events. [2024-06-20 15:14:51,075 INFO L125 PetriNetUnfolderBase]: For 131606/131618 co-relation queries the response was YES. [2024-06-20 15:14:51,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18176 conditions, 2954 events. 1749/2954 cut-off events. For 131606/131618 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17638 event pairs, 380 based on Foata normal form. 13/2966 useless extension candidates. Maximal degree in co-relation 18052. Up to 2542 conditions per place. [2024-06-20 15:14:51,107 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 240 selfloop transitions, 96 changer transitions 0/343 dead transitions. [2024-06-20 15:14:51,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 343 transitions, 4418 flow [2024-06-20 15:14:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:14:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:14:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-20 15:14:51,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354166666666667 [2024-06-20 15:14:51,109 INFO L175 Difference]: Start difference. First operand has 272 places, 311 transitions, 3442 flow. Second operand 12 states and 257 transitions. [2024-06-20 15:14:51,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 343 transitions, 4418 flow [2024-06-20 15:14:51,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 343 transitions, 4097 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-20 15:14:51,575 INFO L231 Difference]: Finished difference. Result has 277 places, 317 transitions, 3439 flow [2024-06-20 15:14:51,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3179, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3439, PETRI_PLACES=277, PETRI_TRANSITIONS=317} [2024-06-20 15:14:51,576 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-20 15:14:51,576 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 317 transitions, 3439 flow [2024-06-20 15:14:51,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:51,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:51,577 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] [2024-06-20 15:14:51,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:14:51,577 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)] === [2024-06-20 15:14:51,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:51,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1972122293, now seen corresponding path program 3 times [2024-06-20 15:14:51,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:51,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995748836] [2024-06-20 15:14:51,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:51,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:51,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:51,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995748836] [2024-06-20 15:14:51,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995748836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:51,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:51,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:14:51,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138277224] [2024-06-20 15:14:51,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:51,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:14:51,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:51,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:14:51,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:14:51,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:51,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 317 transitions, 3439 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:51,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:51,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:51,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:52,274 INFO L124 PetriNetUnfolderBase]: 1746/2950 cut-off events. [2024-06-20 15:14:52,275 INFO L125 PetriNetUnfolderBase]: For 128633/128645 co-relation queries the response was YES. [2024-06-20 15:14:52,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18040 conditions, 2950 events. 1746/2950 cut-off events. For 128633/128645 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17658 event pairs, 380 based on Foata normal form. 13/2962 useless extension candidates. Maximal degree in co-relation 17914. Up to 2539 conditions per place. [2024-06-20 15:14:52,307 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 240 selfloop transitions, 96 changer transitions 0/343 dead transitions. [2024-06-20 15:14:52,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 343 transitions, 4173 flow [2024-06-20 15:14:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:14:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:14:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-06-20 15:14:52,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-20 15:14:52,308 INFO L175 Difference]: Start difference. First operand has 277 places, 317 transitions, 3439 flow. Second operand 13 states and 273 transitions. [2024-06-20 15:14:52,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 343 transitions, 4173 flow [2024-06-20 15:14:52,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 343 transitions, 4030 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:52,919 INFO L231 Difference]: Finished difference. Result has 282 places, 317 transitions, 3494 flow [2024-06-20 15:14:52,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3296, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3494, PETRI_PLACES=282, PETRI_TRANSITIONS=317} [2024-06-20 15:14:52,920 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-20 15:14:52,920 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 317 transitions, 3494 flow [2024-06-20 15:14:52,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:52,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:52,921 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] [2024-06-20 15:14:52,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:14:52,921 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)] === [2024-06-20 15:14:52,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:52,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1119383529, now seen corresponding path program 4 times [2024-06-20 15:14:52,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:52,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370664293] [2024-06-20 15:14:52,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:52,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:53,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:53,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370664293] [2024-06-20 15:14:53,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370664293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:53,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:53,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:14:53,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558216835] [2024-06-20 15:14:53,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:53,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:14:53,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:53,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:14:53,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:14:53,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:53,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 317 transitions, 3494 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:53,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:53,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:53,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:53,607 INFO L124 PetriNetUnfolderBase]: 1767/2985 cut-off events. [2024-06-20 15:14:53,607 INFO L125 PetriNetUnfolderBase]: For 136542/136554 co-relation queries the response was YES. [2024-06-20 15:14:53,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18546 conditions, 2985 events. 1767/2985 cut-off events. For 136542/136554 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 17868 event pairs, 380 based on Foata normal form. 13/2997 useless extension candidates. Maximal degree in co-relation 18418. Up to 2547 conditions per place. [2024-06-20 15:14:53,641 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 108 changer transitions 0/349 dead transitions. [2024-06-20 15:14:53,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 349 transitions, 4468 flow [2024-06-20 15:14:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:14:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:14:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-20 15:14:53,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-20 15:14:53,643 INFO L175 Difference]: Start difference. First operand has 282 places, 317 transitions, 3494 flow. Second operand 12 states and 254 transitions. [2024-06-20 15:14:53,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 349 transitions, 4468 flow [2024-06-20 15:14:54,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 349 transitions, 4272 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-20 15:14:54,205 INFO L231 Difference]: Finished difference. Result has 283 places, 326 transitions, 3654 flow [2024-06-20 15:14:54,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3654, PETRI_PLACES=283, PETRI_TRANSITIONS=326} [2024-06-20 15:14:54,205 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-20 15:14:54,205 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 326 transitions, 3654 flow [2024-06-20 15:14:54,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:54,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:54,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:54,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:14:54,206 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)] === [2024-06-20 15:14:54,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:54,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1126735179, now seen corresponding path program 5 times [2024-06-20 15:14:54,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:54,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339174719] [2024-06-20 15:14:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:54,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:54,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:54,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339174719] [2024-06-20 15:14:54,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339174719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:54,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:54,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:14:54,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273913648] [2024-06-20 15:14:54,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:54,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:14:54,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:54,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:14:54,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:14:54,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:54,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 326 transitions, 3654 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:54,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:54,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:54,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:54,921 INFO L124 PetriNetUnfolderBase]: 1772/2994 cut-off events. [2024-06-20 15:14:54,921 INFO L125 PetriNetUnfolderBase]: For 140457/140469 co-relation queries the response was YES. [2024-06-20 15:14:54,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18738 conditions, 2994 events. 1772/2994 cut-off events. For 140457/140469 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 17944 event pairs, 380 based on Foata normal form. 13/3006 useless extension candidates. Maximal degree in co-relation 18608. Up to 2553 conditions per place. [2024-06-20 15:14:54,955 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 239 selfloop transitions, 110 changer transitions 0/356 dead transitions. [2024-06-20 15:14:54,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 356 transitions, 4725 flow [2024-06-20 15:14:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-20 15:14:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-20 15:14:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 311 transitions. [2024-06-20 15:14:54,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183333333333333 [2024-06-20 15:14:54,957 INFO L175 Difference]: Start difference. First operand has 283 places, 326 transitions, 3654 flow. Second operand 15 states and 311 transitions. [2024-06-20 15:14:54,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 356 transitions, 4725 flow [2024-06-20 15:14:55,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 356 transitions, 4572 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 15:14:55,631 INFO L231 Difference]: Finished difference. Result has 290 places, 329 transitions, 3770 flow [2024-06-20 15:14:55,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3501, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3770, PETRI_PLACES=290, PETRI_TRANSITIONS=329} [2024-06-20 15:14:55,632 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 249 predicate places. [2024-06-20 15:14:55,632 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 329 transitions, 3770 flow [2024-06-20 15:14:55,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:55,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:55,632 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] [2024-06-20 15:14:55,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:14:55,633 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)] === [2024-06-20 15:14:55,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:55,633 INFO L85 PathProgramCache]: Analyzing trace with hash -558375965, now seen corresponding path program 6 times [2024-06-20 15:14:55,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:55,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124263786] [2024-06-20 15:14:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:55,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:55,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:55,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124263786] [2024-06-20 15:14:55,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124263786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:55,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:55,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:14:55,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672803931] [2024-06-20 15:14:55,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:55,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:14:55,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:55,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:14:55,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:14:55,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:55,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 329 transitions, 3770 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:55,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:55,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:55,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:56,369 INFO L124 PetriNetUnfolderBase]: 1769/2990 cut-off events. [2024-06-20 15:14:56,369 INFO L125 PetriNetUnfolderBase]: For 141854/141866 co-relation queries the response was YES. [2024-06-20 15:14:56,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18859 conditions, 2990 events. 1769/2990 cut-off events. For 141854/141866 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 17918 event pairs, 380 based on Foata normal form. 13/3002 useless extension candidates. Maximal degree in co-relation 18727. Up to 2550 conditions per place. [2024-06-20 15:14:56,403 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 236 selfloop transitions, 110 changer transitions 0/353 dead transitions. [2024-06-20 15:14:56,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 353 transitions, 4654 flow [2024-06-20 15:14:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:14:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:14:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-20 15:14:56,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269230769230769 [2024-06-20 15:14:56,405 INFO L175 Difference]: Start difference. First operand has 290 places, 329 transitions, 3770 flow. Second operand 13 states and 274 transitions. [2024-06-20 15:14:56,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 353 transitions, 4654 flow [2024-06-20 15:14:57,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 353 transitions, 4346 flow, removed 22 selfloop flow, removed 12 redundant places. [2024-06-20 15:14:57,040 INFO L231 Difference]: Finished difference. Result has 291 places, 329 transitions, 3688 flow [2024-06-20 15:14:57,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3462, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3688, PETRI_PLACES=291, PETRI_TRANSITIONS=329} [2024-06-20 15:14:57,040 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-20 15:14:57,041 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 329 transitions, 3688 flow [2024-06-20 15:14:57,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:57,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:57,041 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] [2024-06-20 15:14:57,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:14:57,041 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)] === [2024-06-20 15:14:57,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:57,042 INFO L85 PathProgramCache]: Analyzing trace with hash -401079187, now seen corresponding path program 7 times [2024-06-20 15:14:57,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:57,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833043242] [2024-06-20 15:14:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:57,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:57,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:57,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833043242] [2024-06-20 15:14:57,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833043242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:57,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:57,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:14:57,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332426685] [2024-06-20 15:14:57,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:57,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:14:57,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:57,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:14:57,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:14:57,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:57,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 329 transitions, 3688 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:57,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:57,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:57,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:57,722 INFO L124 PetriNetUnfolderBase]: 1782/3011 cut-off events. [2024-06-20 15:14:57,723 INFO L125 PetriNetUnfolderBase]: For 148127/148135 co-relation queries the response was YES. [2024-06-20 15:14:57,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18925 conditions, 3011 events. 1782/3011 cut-off events. For 148127/148135 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 18067 event pairs, 397 based on Foata normal form. 9/3018 useless extension candidates. Maximal degree in co-relation 18793. Up to 2491 conditions per place. [2024-06-20 15:14:57,760 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 235 selfloop transitions, 116 changer transitions 0/358 dead transitions. [2024-06-20 15:14:57,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 358 transitions, 4806 flow [2024-06-20 15:14:57,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:14:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:14:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:14:57,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-20 15:14:57,761 INFO L175 Difference]: Start difference. First operand has 291 places, 329 transitions, 3688 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:14:57,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 358 transitions, 4806 flow [2024-06-20 15:14:58,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 358 transitions, 4586 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-20 15:14:58,422 INFO L231 Difference]: Finished difference. Result has 287 places, 335 transitions, 3790 flow [2024-06-20 15:14:58,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3790, PETRI_PLACES=287, PETRI_TRANSITIONS=335} [2024-06-20 15:14:58,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-20 15:14:58,423 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 335 transitions, 3790 flow [2024-06-20 15:14:58,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:58,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:58,423 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] [2024-06-20 15:14:58,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:14:58,423 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)] === [2024-06-20 15:14:58,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:58,424 INFO L85 PathProgramCache]: Analyzing trace with hash -397354537, now seen corresponding path program 8 times [2024-06-20 15:14:58,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:58,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909040708] [2024-06-20 15:14:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:58,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:14:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:14:58,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:14:58,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909040708] [2024-06-20 15:14:58,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909040708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:14:58,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:14:58,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:14:58,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776033478] [2024-06-20 15:14:58,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:14:58,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:14:58,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:14:58,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:14:58,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:14:58,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:14:58,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 335 transitions, 3790 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:58,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:14:58,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:14:58,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:14:59,157 INFO L124 PetriNetUnfolderBase]: 1787/3021 cut-off events. [2024-06-20 15:14:59,158 INFO L125 PetriNetUnfolderBase]: For 152287/152299 co-relation queries the response was YES. [2024-06-20 15:14:59,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19080 conditions, 3021 events. 1787/3021 cut-off events. For 152287/152299 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 18131 event pairs, 380 based on Foata normal form. 13/3033 useless extension candidates. Maximal degree in co-relation 18947. Up to 2631 conditions per place. [2024-06-20 15:14:59,190 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 286 selfloop transitions, 66 changer transitions 0/359 dead transitions. [2024-06-20 15:14:59,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 359 transitions, 4730 flow [2024-06-20 15:14:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:14:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:14:59,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-20 15:14:59,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-20 15:14:59,191 INFO L175 Difference]: Start difference. First operand has 287 places, 335 transitions, 3790 flow. Second operand 10 states and 218 transitions. [2024-06-20 15:14:59,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 359 transitions, 4730 flow [2024-06-20 15:14:59,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 359 transitions, 4530 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 15:14:59,874 INFO L231 Difference]: Finished difference. Result has 293 places, 338 transitions, 3774 flow [2024-06-20 15:14:59,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3593, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3774, PETRI_PLACES=293, PETRI_TRANSITIONS=338} [2024-06-20 15:14:59,875 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-20 15:14:59,875 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 338 transitions, 3774 flow [2024-06-20 15:14:59,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:14:59,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:14:59,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:14:59,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:14:59,876 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)] === [2024-06-20 15:14:59,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:14:59,876 INFO L85 PathProgramCache]: Analyzing trace with hash -234845407, now seen corresponding path program 9 times [2024-06-20 15:14:59,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:14:59,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417313176] [2024-06-20 15:14:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:14:59,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:14:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:00,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:00,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417313176] [2024-06-20 15:15:00,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417313176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:00,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:00,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:00,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673600576] [2024-06-20 15:15:00,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:00,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:00,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:00,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:00,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:00,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:00,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 338 transitions, 3774 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:00,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:00,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:00,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:00,547 INFO L124 PetriNetUnfolderBase]: 1792/3030 cut-off events. [2024-06-20 15:15:00,547 INFO L125 PetriNetUnfolderBase]: For 156272/156284 co-relation queries the response was YES. [2024-06-20 15:15:00,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19066 conditions, 3030 events. 1792/3030 cut-off events. For 156272/156284 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18230 event pairs, 380 based on Foata normal form. 13/3042 useless extension candidates. Maximal degree in co-relation 18932. Up to 2503 conditions per place. [2024-06-20 15:15:00,584 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 238 selfloop transitions, 128 changer transitions 0/373 dead transitions. [2024-06-20 15:15:00,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 373 transitions, 4907 flow [2024-06-20 15:15:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:00,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:00,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-20 15:15:00,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5704545454545454 [2024-06-20 15:15:00,585 INFO L175 Difference]: Start difference. First operand has 293 places, 338 transitions, 3774 flow. Second operand 11 states and 251 transitions. [2024-06-20 15:15:00,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 373 transitions, 4907 flow [2024-06-20 15:15:01,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 373 transitions, 4723 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:01,383 INFO L231 Difference]: Finished difference. Result has 295 places, 341 transitions, 3891 flow [2024-06-20 15:15:01,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3590, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3891, PETRI_PLACES=295, PETRI_TRANSITIONS=341} [2024-06-20 15:15:01,384 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-20 15:15:01,384 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 341 transitions, 3891 flow [2024-06-20 15:15:01,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:01,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:01,384 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] [2024-06-20 15:15:01,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:15:01,384 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)] === [2024-06-20 15:15:01,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:01,385 INFO L85 PathProgramCache]: Analyzing trace with hash -397360117, now seen corresponding path program 10 times [2024-06-20 15:15:01,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:01,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152024408] [2024-06-20 15:15:01,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:01,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:01,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:01,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152024408] [2024-06-20 15:15:01,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152024408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:01,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:01,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:01,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089227749] [2024-06-20 15:15:01,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:01,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:01,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:01,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:01,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:01,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:01,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 341 transitions, 3891 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:01,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:01,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:01,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:02,060 INFO L124 PetriNetUnfolderBase]: 1789/3026 cut-off events. [2024-06-20 15:15:02,061 INFO L125 PetriNetUnfolderBase]: For 157959/157971 co-relation queries the response was YES. [2024-06-20 15:15:02,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19153 conditions, 3026 events. 1789/3026 cut-off events. For 157959/157971 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18213 event pairs, 380 based on Foata normal form. 13/3038 useless extension candidates. Maximal degree in co-relation 19018. Up to 2635 conditions per place. [2024-06-20 15:15:02,095 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 64 changer transitions 0/359 dead transitions. [2024-06-20 15:15:02,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 359 transitions, 4639 flow [2024-06-20 15:15:02,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:02,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 15:15:02,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-20 15:15:02,099 INFO L175 Difference]: Start difference. First operand has 295 places, 341 transitions, 3891 flow. Second operand 8 states and 182 transitions. [2024-06-20 15:15:02,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 359 transitions, 4639 flow [2024-06-20 15:15:02,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 359 transitions, 4299 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:02,883 INFO L231 Difference]: Finished difference. Result has 294 places, 341 transitions, 3685 flow [2024-06-20 15:15:02,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3551, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3685, PETRI_PLACES=294, PETRI_TRANSITIONS=341} [2024-06-20 15:15:02,883 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-20 15:15:02,884 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 341 transitions, 3685 flow [2024-06-20 15:15:02,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:02,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:02,884 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] [2024-06-20 15:15:02,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:15:02,884 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)] === [2024-06-20 15:15:02,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash -225590977, now seen corresponding path program 11 times [2024-06-20 15:15:02,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:02,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931988149] [2024-06-20 15:15:02,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:02,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:03,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:03,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931988149] [2024-06-20 15:15:03,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931988149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:03,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:03,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:03,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253567246] [2024-06-20 15:15:03,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:03,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:03,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:03,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:03,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:03,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:03,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 341 transitions, 3685 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:03,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:03,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:03,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:03,547 INFO L124 PetriNetUnfolderBase]: 1802/3048 cut-off events. [2024-06-20 15:15:03,548 INFO L125 PetriNetUnfolderBase]: For 163498/163510 co-relation queries the response was YES. [2024-06-20 15:15:03,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19150 conditions, 3048 events. 1802/3048 cut-off events. For 163498/163510 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 18376 event pairs, 380 based on Foata normal form. 13/3060 useless extension candidates. Maximal degree in co-relation 19014. Up to 2515 conditions per place. [2024-06-20 15:15:03,582 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 233 selfloop transitions, 138 changer transitions 0/378 dead transitions. [2024-06-20 15:15:03,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 378 transitions, 4855 flow [2024-06-20 15:15:03,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:15:03,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:15:03,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 286 transitions. [2024-06-20 15:15:03,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:15:03,584 INFO L175 Difference]: Start difference. First operand has 294 places, 341 transitions, 3685 flow. Second operand 13 states and 286 transitions. [2024-06-20 15:15:03,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 378 transitions, 4855 flow [2024-06-20 15:15:04,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 378 transitions, 4727 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:04,324 INFO L231 Difference]: Finished difference. Result has 300 places, 347 transitions, 3901 flow [2024-06-20 15:15:04,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3557, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3901, PETRI_PLACES=300, PETRI_TRANSITIONS=347} [2024-06-20 15:15:04,324 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-20 15:15:04,325 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 347 transitions, 3901 flow [2024-06-20 15:15:04,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:04,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:04,325 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] [2024-06-20 15:15:04,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:15:04,325 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)] === [2024-06-20 15:15:04,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:04,325 INFO L85 PathProgramCache]: Analyzing trace with hash -225579817, now seen corresponding path program 12 times [2024-06-20 15:15:04,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:04,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040498769] [2024-06-20 15:15:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:04,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:04,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:04,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040498769] [2024-06-20 15:15:04,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040498769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:04,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:04,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:04,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898908693] [2024-06-20 15:15:04,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:04,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:04,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:04,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:04,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:04,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:04,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 347 transitions, 3901 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:04,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:04,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:04,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:05,043 INFO L124 PetriNetUnfolderBase]: 1799/3044 cut-off events. [2024-06-20 15:15:05,044 INFO L125 PetriNetUnfolderBase]: For 165307/165319 co-relation queries the response was YES. [2024-06-20 15:15:05,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19300 conditions, 3044 events. 1799/3044 cut-off events. For 165307/165319 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 18326 event pairs, 380 based on Foata normal form. 13/3056 useless extension candidates. Maximal degree in co-relation 19163. Up to 2512 conditions per place. [2024-06-20 15:15:05,080 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 230 selfloop transitions, 140 changer transitions 0/377 dead transitions. [2024-06-20 15:15:05,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 377 transitions, 4861 flow [2024-06-20 15:15:05,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:15:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:15:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 283 transitions. [2024-06-20 15:15:05,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5442307692307692 [2024-06-20 15:15:05,081 INFO L175 Difference]: Start difference. First operand has 300 places, 347 transitions, 3901 flow. Second operand 13 states and 283 transitions. [2024-06-20 15:15:05,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 377 transitions, 4861 flow [2024-06-20 15:15:05,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 377 transitions, 4602 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:05,941 INFO L231 Difference]: Finished difference. Result has 304 places, 347 transitions, 3928 flow [2024-06-20 15:15:05,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3642, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3928, PETRI_PLACES=304, PETRI_TRANSITIONS=347} [2024-06-20 15:15:05,942 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-20 15:15:05,942 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 347 transitions, 3928 flow [2024-06-20 15:15:05,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:05,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:05,943 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] [2024-06-20 15:15:05,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:15:05,943 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)] === [2024-06-20 15:15:05,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:05,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2045214539, now seen corresponding path program 13 times [2024-06-20 15:15:05,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:05,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795725485] [2024-06-20 15:15:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:05,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:06,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:06,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795725485] [2024-06-20 15:15:06,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795725485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:06,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:06,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:06,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742939136] [2024-06-20 15:15:06,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:06,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:06,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:06,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:06,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:06,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:06,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 347 transitions, 3928 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:06,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:06,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:06,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:06,669 INFO L124 PetriNetUnfolderBase]: 1828/3096 cut-off events. [2024-06-20 15:15:06,670 INFO L125 PetriNetUnfolderBase]: For 172760/172772 co-relation queries the response was YES. [2024-06-20 15:15:06,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19736 conditions, 3096 events. 1828/3096 cut-off events. For 172760/172772 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 18701 event pairs, 380 based on Foata normal form. 13/3108 useless extension candidates. Maximal degree in co-relation 19598. Up to 2613 conditions per place. [2024-06-20 15:15:06,706 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 279 selfloop transitions, 103 changer transitions 0/389 dead transitions. [2024-06-20 15:15:06,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 389 transitions, 5231 flow [2024-06-20 15:15:06,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 15:15:06,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-20 15:15:06,707 INFO L175 Difference]: Start difference. First operand has 304 places, 347 transitions, 3928 flow. Second operand 9 states and 215 transitions. [2024-06-20 15:15:06,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 389 transitions, 5231 flow [2024-06-20 15:15:07,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 389 transitions, 4925 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-20 15:15:07,519 INFO L231 Difference]: Finished difference. Result has 302 places, 358 transitions, 4025 flow [2024-06-20 15:15:07,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4025, PETRI_PLACES=302, PETRI_TRANSITIONS=358} [2024-06-20 15:15:07,519 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-20 15:15:07,520 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 358 transitions, 4025 flow [2024-06-20 15:15:07,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:07,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:07,520 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] [2024-06-20 15:15:07,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:15:07,520 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)] === [2024-06-20 15:15:07,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:07,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2045220119, now seen corresponding path program 14 times [2024-06-20 15:15:07,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:07,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546234055] [2024-06-20 15:15:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:07,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:07,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:07,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546234055] [2024-06-20 15:15:07,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546234055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:07,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:07,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:07,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70119684] [2024-06-20 15:15:07,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:07,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:07,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:07,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:07,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:07,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:07,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 358 transitions, 4025 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:07,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:07,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:07,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:08,256 INFO L124 PetriNetUnfolderBase]: 1841/3118 cut-off events. [2024-06-20 15:15:08,256 INFO L125 PetriNetUnfolderBase]: For 179939/179951 co-relation queries the response was YES. [2024-06-20 15:15:08,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19948 conditions, 3118 events. 1841/3118 cut-off events. For 179939/179951 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 18870 event pairs, 380 based on Foata normal form. 13/3130 useless extension candidates. Maximal degree in co-relation 19808. Up to 2628 conditions per place. [2024-06-20 15:15:08,293 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 272 selfloop transitions, 114 changer transitions 0/393 dead transitions. [2024-06-20 15:15:08,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 393 transitions, 5264 flow [2024-06-20 15:15:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-20 15:15:08,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-20 15:15:08,294 INFO L175 Difference]: Start difference. First operand has 302 places, 358 transitions, 4025 flow. Second operand 10 states and 229 transitions. [2024-06-20 15:15:08,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 393 transitions, 5264 flow [2024-06-20 15:15:09,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 393 transitions, 5039 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:09,224 INFO L231 Difference]: Finished difference. Result has 306 places, 365 transitions, 4168 flow [2024-06-20 15:15:09,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3813, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4168, PETRI_PLACES=306, PETRI_TRANSITIONS=365} [2024-06-20 15:15:09,225 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-20 15:15:09,225 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 365 transitions, 4168 flow [2024-06-20 15:15:09,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:09,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:09,226 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] [2024-06-20 15:15:09,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:15:09,228 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)] === [2024-06-20 15:15:09,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:09,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2045398679, now seen corresponding path program 15 times [2024-06-20 15:15:09,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:09,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921144048] [2024-06-20 15:15:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:09,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:09,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:09,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921144048] [2024-06-20 15:15:09,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921144048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:09,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:09,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:09,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641336904] [2024-06-20 15:15:09,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:09,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:09,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:09,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:09,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:09,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:09,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 365 transitions, 4168 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:09,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:09,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:09,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:10,022 INFO L124 PetriNetUnfolderBase]: 1846/3127 cut-off events. [2024-06-20 15:15:10,023 INFO L125 PetriNetUnfolderBase]: For 180056/180068 co-relation queries the response was YES. [2024-06-20 15:15:10,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20082 conditions, 3127 events. 1846/3127 cut-off events. For 180056/180068 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18942 event pairs, 380 based on Foata normal form. 13/3139 useless extension candidates. Maximal degree in co-relation 19941. Up to 2634 conditions per place. [2024-06-20 15:15:10,068 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 272 selfloop transitions, 112 changer transitions 0/391 dead transitions. [2024-06-20 15:15:10,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 391 transitions, 5345 flow [2024-06-20 15:15:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:15:10,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-20 15:15:10,070 INFO L175 Difference]: Start difference. First operand has 306 places, 365 transitions, 4168 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:15:10,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 391 transitions, 5345 flow [2024-06-20 15:15:11,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 391 transitions, 5131 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:11,041 INFO L231 Difference]: Finished difference. Result has 307 places, 368 transitions, 4237 flow [2024-06-20 15:15:11,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3961, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4237, PETRI_PLACES=307, PETRI_TRANSITIONS=368} [2024-06-20 15:15:11,041 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-20 15:15:11,042 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 368 transitions, 4237 flow [2024-06-20 15:15:11,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:11,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:11,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:11,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:15:11,042 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)] === [2024-06-20 15:15:11,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:11,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2045571659, now seen corresponding path program 16 times [2024-06-20 15:15:11,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:11,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773852357] [2024-06-20 15:15:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:11,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:11,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:11,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773852357] [2024-06-20 15:15:11,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773852357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:11,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:11,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:11,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558788893] [2024-06-20 15:15:11,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:11,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:11,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:11,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:11,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:11,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:11,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 368 transitions, 4237 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:11,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:11,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:11,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:11,777 INFO L124 PetriNetUnfolderBase]: 1843/3123 cut-off events. [2024-06-20 15:15:11,777 INFO L125 PetriNetUnfolderBase]: For 177398/177410 co-relation queries the response was YES. [2024-06-20 15:15:11,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19972 conditions, 3123 events. 1843/3123 cut-off events. For 177398/177410 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18916 event pairs, 380 based on Foata normal form. 13/3135 useless extension candidates. Maximal degree in co-relation 19831. Up to 2631 conditions per place. [2024-06-20 15:15:11,814 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 270 selfloop transitions, 116 changer transitions 0/393 dead transitions. [2024-06-20 15:15:11,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 393 transitions, 5373 flow [2024-06-20 15:15:11,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:11,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-20 15:15:11,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-20 15:15:11,816 INFO L175 Difference]: Start difference. First operand has 307 places, 368 transitions, 4237 flow. Second operand 10 states and 227 transitions. [2024-06-20 15:15:11,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 393 transitions, 5373 flow [2024-06-20 15:15:12,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 393 transitions, 5190 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:12,672 INFO L231 Difference]: Finished difference. Result has 312 places, 368 transitions, 4292 flow [2024-06-20 15:15:12,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4054, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4292, PETRI_PLACES=312, PETRI_TRANSITIONS=368} [2024-06-20 15:15:12,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-20 15:15:12,673 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 368 transitions, 4292 flow [2024-06-20 15:15:12,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:12,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:12,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:12,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:15:12,674 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)] === [2024-06-20 15:15:12,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2045566079, now seen corresponding path program 17 times [2024-06-20 15:15:12,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:12,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009016866] [2024-06-20 15:15:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:12,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:12,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:12,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009016866] [2024-06-20 15:15:12,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009016866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:12,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:12,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:12,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172436026] [2024-06-20 15:15:12,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:12,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:12,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:12,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:12,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:12,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:12,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 368 transitions, 4292 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:12,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:12,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:12,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:13,448 INFO L124 PetriNetUnfolderBase]: 1840/3119 cut-off events. [2024-06-20 15:15:13,448 INFO L125 PetriNetUnfolderBase]: For 178947/178959 co-relation queries the response was YES. [2024-06-20 15:15:13,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19959 conditions, 3119 events. 1840/3119 cut-off events. For 178947/178959 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18878 event pairs, 380 based on Foata normal form. 13/3131 useless extension candidates. Maximal degree in co-relation 19817. Up to 2628 conditions per place. [2024-06-20 15:15:13,487 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 269 selfloop transitions, 117 changer transitions 0/393 dead transitions. [2024-06-20 15:15:13,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 393 transitions, 5278 flow [2024-06-20 15:15:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-20 15:15:13,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522727272727272 [2024-06-20 15:15:13,488 INFO L175 Difference]: Start difference. First operand has 312 places, 368 transitions, 4292 flow. Second operand 11 states and 243 transitions. [2024-06-20 15:15:13,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 393 transitions, 5278 flow [2024-06-20 15:15:14,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 393 transitions, 5016 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:14,442 INFO L231 Difference]: Finished difference. Result has 316 places, 368 transitions, 4270 flow [2024-06-20 15:15:14,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4030, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4270, PETRI_PLACES=316, PETRI_TRANSITIONS=368} [2024-06-20 15:15:14,443 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-20 15:15:14,443 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 368 transitions, 4270 flow [2024-06-20 15:15:14,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:14,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:14,443 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] [2024-06-20 15:15:14,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:15:14,443 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)] === [2024-06-20 15:15:14,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:14,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2045387519, now seen corresponding path program 18 times [2024-06-20 15:15:14,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:14,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272270927] [2024-06-20 15:15:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:14,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:14,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:14,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272270927] [2024-06-20 15:15:14,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272270927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:14,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:14,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:14,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984499604] [2024-06-20 15:15:14,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:14,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:14,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:14,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:14,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:14,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:14,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 368 transitions, 4270 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:14,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:14,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:14,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:15,170 INFO L124 PetriNetUnfolderBase]: 1837/3115 cut-off events. [2024-06-20 15:15:15,170 INFO L125 PetriNetUnfolderBase]: For 179929/179941 co-relation queries the response was YES. [2024-06-20 15:15:15,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19889 conditions, 3115 events. 1837/3115 cut-off events. For 179929/179941 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18848 event pairs, 380 based on Foata normal form. 13/3127 useless extension candidates. Maximal degree in co-relation 19746. Up to 2625 conditions per place. [2024-06-20 15:15:15,208 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 274 selfloop transitions, 111 changer transitions 0/392 dead transitions. [2024-06-20 15:15:15,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 392 transitions, 5100 flow [2024-06-20 15:15:15,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:15,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:15:15,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 15:15:15,209 INFO L175 Difference]: Start difference. First operand has 316 places, 368 transitions, 4270 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:15:15,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 392 transitions, 5100 flow [2024-06-20 15:15:16,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 392 transitions, 4810 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-20 15:15:16,226 INFO L231 Difference]: Finished difference. Result has 313 places, 368 transitions, 4208 flow [2024-06-20 15:15:16,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3980, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4208, PETRI_PLACES=313, PETRI_TRANSITIONS=368} [2024-06-20 15:15:16,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-20 15:15:16,226 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 368 transitions, 4208 flow [2024-06-20 15:15:16,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:16,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:16,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:16,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:15:16,227 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)] === [2024-06-20 15:15:16,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:16,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1475184831, now seen corresponding path program 19 times [2024-06-20 15:15:16,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:16,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072964802] [2024-06-20 15:15:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:16,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:16,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:16,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072964802] [2024-06-20 15:15:16,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072964802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:16,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:16,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:16,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525344024] [2024-06-20 15:15:16,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:16,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:16,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:16,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:16,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:16,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 368 transitions, 4208 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:16,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:16,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:16,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:16,948 INFO L124 PetriNetUnfolderBase]: 1842/3121 cut-off events. [2024-06-20 15:15:16,948 INFO L125 PetriNetUnfolderBase]: For 184087/184095 co-relation queries the response was YES. [2024-06-20 15:15:16,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19942 conditions, 3121 events. 1842/3121 cut-off events. For 184087/184095 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 18924 event pairs, 402 based on Foata normal form. 6/3125 useless extension candidates. Maximal degree in co-relation 19798. Up to 2552 conditions per place. [2024-06-20 15:15:16,987 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 170 changer transitions 0/389 dead transitions. [2024-06-20 15:15:16,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 389 transitions, 5206 flow [2024-06-20 15:15:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-20 15:15:16,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-20 15:15:16,989 INFO L175 Difference]: Start difference. First operand has 313 places, 368 transitions, 4208 flow. Second operand 10 states and 218 transitions. [2024-06-20 15:15:16,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 389 transitions, 5206 flow [2024-06-20 15:15:18,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 389 transitions, 4942 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:18,152 INFO L231 Difference]: Finished difference. Result has 315 places, 371 transitions, 4324 flow [2024-06-20 15:15:18,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3944, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4324, PETRI_PLACES=315, PETRI_TRANSITIONS=371} [2024-06-20 15:15:18,161 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-20 15:15:18,161 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 371 transitions, 4324 flow [2024-06-20 15:15:18,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:18,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:18,161 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] [2024-06-20 15:15:18,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:15:18,161 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)] === [2024-06-20 15:15:18,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:18,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1135365621, now seen corresponding path program 20 times [2024-06-20 15:15:18,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:18,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877859397] [2024-06-20 15:15:18,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:18,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:18,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:18,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877859397] [2024-06-20 15:15:18,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877859397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:18,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:18,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:18,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62373453] [2024-06-20 15:15:18,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:18,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:18,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:18,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:18,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:18,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 371 transitions, 4324 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:18,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:18,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:18,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:18,928 INFO L124 PetriNetUnfolderBase]: 1855/3146 cut-off events. [2024-06-20 15:15:18,928 INFO L125 PetriNetUnfolderBase]: For 191323/191335 co-relation queries the response was YES. [2024-06-20 15:15:18,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20302 conditions, 3146 events. 1855/3146 cut-off events. For 191323/191335 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19093 event pairs, 380 based on Foata normal form. 13/3158 useless extension candidates. Maximal degree in co-relation 20157. Up to 2567 conditions per place. [2024-06-20 15:15:18,966 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 226 selfloop transitions, 182 changer transitions 0/415 dead transitions. [2024-06-20 15:15:18,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 415 transitions, 5632 flow [2024-06-20 15:15:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 15:15:18,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 15:15:18,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 309 transitions. [2024-06-20 15:15:18,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517857142857143 [2024-06-20 15:15:18,967 INFO L175 Difference]: Start difference. First operand has 315 places, 371 transitions, 4324 flow. Second operand 14 states and 309 transitions. [2024-06-20 15:15:18,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 415 transitions, 5632 flow [2024-06-20 15:15:20,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 415 transitions, 5330 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:20,133 INFO L231 Difference]: Finished difference. Result has 322 places, 377 transitions, 4480 flow [2024-06-20 15:15:20,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4028, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4480, PETRI_PLACES=322, PETRI_TRANSITIONS=377} [2024-06-20 15:15:20,134 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-20 15:15:20,134 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 377 transitions, 4480 flow [2024-06-20 15:15:20,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:20,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:20,134 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] [2024-06-20 15:15:20,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:15:20,135 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)] === [2024-06-20 15:15:20,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:20,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1142717271, now seen corresponding path program 21 times [2024-06-20 15:15:20,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:20,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70799769] [2024-06-20 15:15:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:20,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:20,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:20,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70799769] [2024-06-20 15:15:20,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70799769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:20,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:20,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:20,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130063430] [2024-06-20 15:15:20,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:20,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:20,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:20,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:20,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:20,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:20,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 377 transitions, 4480 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:20,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:20,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:20,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:20,851 INFO L124 PetriNetUnfolderBase]: 1852/3142 cut-off events. [2024-06-20 15:15:20,852 INFO L125 PetriNetUnfolderBase]: For 192629/192641 co-relation queries the response was YES. [2024-06-20 15:15:20,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20310 conditions, 3142 events. 1852/3142 cut-off events. For 192629/192641 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19097 event pairs, 380 based on Foata normal form. 13/3154 useless extension candidates. Maximal degree in co-relation 20164. Up to 2564 conditions per place. [2024-06-20 15:15:20,894 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 218 selfloop transitions, 181 changer transitions 0/406 dead transitions. [2024-06-20 15:15:20,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 406 transitions, 5510 flow [2024-06-20 15:15:20,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:15:20,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:15:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-20 15:15:20,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:15:20,896 INFO L175 Difference]: Start difference. First operand has 322 places, 377 transitions, 4480 flow. Second operand 12 states and 264 transitions. [2024-06-20 15:15:20,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 406 transitions, 5510 flow [2024-06-20 15:15:22,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 406 transitions, 5150 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-20 15:15:22,023 INFO L231 Difference]: Finished difference. Result has 322 places, 377 transitions, 4496 flow [2024-06-20 15:15:22,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4496, PETRI_PLACES=322, PETRI_TRANSITIONS=377} [2024-06-20 15:15:22,024 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-20 15:15:22,024 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 377 transitions, 4496 flow [2024-06-20 15:15:22,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:22,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:22,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:22,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:15:22,024 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)] === [2024-06-20 15:15:22,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:22,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1135360041, now seen corresponding path program 22 times [2024-06-20 15:15:22,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:22,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629550652] [2024-06-20 15:15:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:22,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:22,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:22,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:22,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629550652] [2024-06-20 15:15:22,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629550652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:22,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:22,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:22,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936396919] [2024-06-20 15:15:22,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:22,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:22,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:22,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:22,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:22,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:22,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 377 transitions, 4496 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:22,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:22,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:22,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:22,787 INFO L124 PetriNetUnfolderBase]: 1849/3138 cut-off events. [2024-06-20 15:15:22,787 INFO L125 PetriNetUnfolderBase]: For 185259/185271 co-relation queries the response was YES. [2024-06-20 15:15:22,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20143 conditions, 3138 events. 1849/3138 cut-off events. For 185259/185271 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19045 event pairs, 380 based on Foata normal form. 13/3150 useless extension candidates. Maximal degree in co-relation 19998. Up to 2561 conditions per place. [2024-06-20 15:15:22,830 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 222 selfloop transitions, 182 changer transitions 0/411 dead transitions. [2024-06-20 15:15:22,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 411 transitions, 5388 flow [2024-06-20 15:15:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:15:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:15:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 271 transitions. [2024-06-20 15:15:22,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5645833333333333 [2024-06-20 15:15:22,832 INFO L175 Difference]: Start difference. First operand has 322 places, 377 transitions, 4496 flow. Second operand 12 states and 271 transitions. [2024-06-20 15:15:22,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 411 transitions, 5388 flow [2024-06-20 15:15:23,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 411 transitions, 4880 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-20 15:15:23,919 INFO L231 Difference]: Finished difference. Result has 320 places, 377 transitions, 4366 flow [2024-06-20 15:15:23,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3988, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4366, PETRI_PLACES=320, PETRI_TRANSITIONS=377} [2024-06-20 15:15:23,919 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-20 15:15:23,919 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 377 transitions, 4366 flow [2024-06-20 15:15:23,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:23,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:23,919 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] [2024-06-20 15:15:23,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:15:23,920 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)] === [2024-06-20 15:15:23,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:23,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1420374067, now seen corresponding path program 23 times [2024-06-20 15:15:23,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:23,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231147373] [2024-06-20 15:15:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:23,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:24,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:24,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231147373] [2024-06-20 15:15:24,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231147373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:24,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:24,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:24,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596277735] [2024-06-20 15:15:24,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:24,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:24,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:24,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:24,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:24,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:24,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 377 transitions, 4366 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:24,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:24,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:24,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:24,630 INFO L124 PetriNetUnfolderBase]: 1862/3160 cut-off events. [2024-06-20 15:15:24,630 INFO L125 PetriNetUnfolderBase]: For 188453/188465 co-relation queries the response was YES. [2024-06-20 15:15:24,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20324 conditions, 3160 events. 1862/3160 cut-off events. For 188453/188465 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 19203 event pairs, 386 based on Foata normal form. 13/3172 useless extension candidates. Maximal degree in co-relation 20179. Up to 2549 conditions per place. [2024-06-20 15:15:24,670 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 227 selfloop transitions, 178 changer transitions 0/412 dead transitions. [2024-06-20 15:15:24,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 412 transitions, 5518 flow [2024-06-20 15:15:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:15:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:15:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-20 15:15:24,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:15:24,671 INFO L175 Difference]: Start difference. First operand has 320 places, 377 transitions, 4366 flow. Second operand 12 states and 264 transitions. [2024-06-20 15:15:24,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 412 transitions, 5518 flow [2024-06-20 15:15:25,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 412 transitions, 5138 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-20 15:15:25,699 INFO L231 Difference]: Finished difference. Result has 319 places, 383 transitions, 4470 flow [2024-06-20 15:15:25,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3990, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4470, PETRI_PLACES=319, PETRI_TRANSITIONS=383} [2024-06-20 15:15:25,700 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-20 15:15:25,700 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 383 transitions, 4470 flow [2024-06-20 15:15:25,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:25,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:25,700 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] [2024-06-20 15:15:25,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:15:25,701 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)] === [2024-06-20 15:15:25,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:25,701 INFO L85 PathProgramCache]: Analyzing trace with hash -973830741, now seen corresponding path program 24 times [2024-06-20 15:15:25,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:25,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484025600] [2024-06-20 15:15:25,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:25,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:25,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:25,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484025600] [2024-06-20 15:15:25,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484025600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:25,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:25,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:25,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501798859] [2024-06-20 15:15:25,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:25,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:25,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:25,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:25,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:25,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:25,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 383 transitions, 4470 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:25,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:25,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:25,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:26,526 INFO L124 PetriNetUnfolderBase]: 1867/3169 cut-off events. [2024-06-20 15:15:26,527 INFO L125 PetriNetUnfolderBase]: For 186773/186785 co-relation queries the response was YES. [2024-06-20 15:15:26,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20620 conditions, 3169 events. 1867/3169 cut-off events. For 186773/186785 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 19298 event pairs, 380 based on Foata normal form. 13/3181 useless extension candidates. Maximal degree in co-relation 20476. Up to 2703 conditions per place. [2024-06-20 15:15:26,561 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 332 selfloop transitions, 72 changer transitions 0/411 dead transitions. [2024-06-20 15:15:26,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 411 transitions, 5544 flow [2024-06-20 15:15:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:26,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:26,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:15:26,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-20 15:15:26,562 INFO L175 Difference]: Start difference. First operand has 319 places, 383 transitions, 4470 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:15:26,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 411 transitions, 5544 flow [2024-06-20 15:15:27,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 411 transitions, 5317 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:27,547 INFO L231 Difference]: Finished difference. Result has 319 places, 386 transitions, 4439 flow [2024-06-20 15:15:27,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4439, PETRI_PLACES=319, PETRI_TRANSITIONS=386} [2024-06-20 15:15:27,547 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-20 15:15:27,548 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 386 transitions, 4439 flow [2024-06-20 15:15:27,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:27,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:27,548 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] [2024-06-20 15:15:27,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:15:27,548 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)] === [2024-06-20 15:15:27,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:27,549 INFO L85 PathProgramCache]: Analyzing trace with hash 110840191, now seen corresponding path program 25 times [2024-06-20 15:15:27,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:27,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956628698] [2024-06-20 15:15:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:27,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:27,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:27,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956628698] [2024-06-20 15:15:27,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956628698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:27,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:27,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:27,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364205736] [2024-06-20 15:15:27,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:27,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:27,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:27,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:27,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:27,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 386 transitions, 4439 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:27,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:27,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:27,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:28,291 INFO L124 PetriNetUnfolderBase]: 1864/3165 cut-off events. [2024-06-20 15:15:28,291 INFO L125 PetriNetUnfolderBase]: For 187348/187360 co-relation queries the response was YES. [2024-06-20 15:15:28,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20627 conditions, 3165 events. 1864/3165 cut-off events. For 187348/187360 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 19251 event pairs, 380 based on Foata normal form. 13/3177 useless extension candidates. Maximal degree in co-relation 20481. Up to 2700 conditions per place. [2024-06-20 15:15:28,331 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 334 selfloop transitions, 74 changer transitions 0/415 dead transitions. [2024-06-20 15:15:28,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 415 transitions, 5327 flow [2024-06-20 15:15:28,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-20 15:15:28,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-20 15:15:28,333 INFO L175 Difference]: Start difference. First operand has 319 places, 386 transitions, 4439 flow. Second operand 10 states and 226 transitions. [2024-06-20 15:15:28,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 415 transitions, 5327 flow [2024-06-20 15:15:29,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 415 transitions, 5100 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 15:15:29,499 INFO L231 Difference]: Finished difference. Result has 323 places, 386 transitions, 4366 flow [2024-06-20 15:15:29,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4212, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4366, PETRI_PLACES=323, PETRI_TRANSITIONS=386} [2024-06-20 15:15:29,500 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 282 predicate places. [2024-06-20 15:15:29,500 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 386 transitions, 4366 flow [2024-06-20 15:15:29,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:29,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:29,500 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] [2024-06-20 15:15:29,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:15:29,500 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)] === [2024-06-20 15:15:29,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:29,501 INFO L85 PathProgramCache]: Analyzing trace with hash 123738361, now seen corresponding path program 26 times [2024-06-20 15:15:29,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:29,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710991761] [2024-06-20 15:15:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:29,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:29,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:29,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710991761] [2024-06-20 15:15:29,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710991761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:29,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:29,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:29,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284361569] [2024-06-20 15:15:29,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:29,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:29,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:29,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:29,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:29,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:29,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 386 transitions, 4366 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:29,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:29,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:29,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:30,204 INFO L124 PetriNetUnfolderBase]: 1869/3174 cut-off events. [2024-06-20 15:15:30,205 INFO L125 PetriNetUnfolderBase]: For 191313/191325 co-relation queries the response was YES. [2024-06-20 15:15:30,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20600 conditions, 3174 events. 1869/3174 cut-off events. For 191313/191325 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 19327 event pairs, 386 based on Foata normal form. 13/3186 useless extension candidates. Maximal degree in co-relation 20455. Up to 2603 conditions per place. [2024-06-20 15:15:30,245 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 259 selfloop transitions, 145 changer transitions 0/411 dead transitions. [2024-06-20 15:15:30,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 411 transitions, 5432 flow [2024-06-20 15:15:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:30,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:15:30,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:15:30,246 INFO L175 Difference]: Start difference. First operand has 323 places, 386 transitions, 4366 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:15:30,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 411 transitions, 5432 flow [2024-06-20 15:15:31,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 411 transitions, 5101 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-20 15:15:31,208 INFO L231 Difference]: Finished difference. Result has 319 places, 389 transitions, 4373 flow [2024-06-20 15:15:31,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4035, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4373, PETRI_PLACES=319, PETRI_TRANSITIONS=389} [2024-06-20 15:15:31,208 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-20 15:15:31,209 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 389 transitions, 4373 flow [2024-06-20 15:15:31,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:31,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:31,209 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] [2024-06-20 15:15:31,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:15:31,209 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)] === [2024-06-20 15:15:31,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash 289972141, now seen corresponding path program 27 times [2024-06-20 15:15:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:31,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404876191] [2024-06-20 15:15:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:31,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:31,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:31,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404876191] [2024-06-20 15:15:31,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404876191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:31,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:31,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:31,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655888361] [2024-06-20 15:15:31,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:31,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:31,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:31,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:31,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:31,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:31,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 389 transitions, 4373 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:31,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:31,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:31,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:31,886 INFO L124 PetriNetUnfolderBase]: 1874/3183 cut-off events. [2024-06-20 15:15:31,887 INFO L125 PetriNetUnfolderBase]: For 195373/195385 co-relation queries the response was YES. [2024-06-20 15:15:31,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20759 conditions, 3183 events. 1874/3183 cut-off events. For 195373/195385 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19432 event pairs, 380 based on Foata normal form. 13/3195 useless extension candidates. Maximal degree in co-relation 20613. Up to 2609 conditions per place. [2024-06-20 15:15:31,927 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 254 selfloop transitions, 156 changer transitions 0/417 dead transitions. [2024-06-20 15:15:31,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 417 transitions, 5465 flow [2024-06-20 15:15:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:15:31,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:15:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-20 15:15:31,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-20 15:15:31,929 INFO L175 Difference]: Start difference. First operand has 319 places, 389 transitions, 4373 flow. Second operand 11 states and 244 transitions. [2024-06-20 15:15:31,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 417 transitions, 5465 flow [2024-06-20 15:15:32,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 417 transitions, 5216 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:32,757 INFO L231 Difference]: Finished difference. Result has 325 places, 392 transitions, 4490 flow [2024-06-20 15:15:32,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4490, PETRI_PLACES=325, PETRI_TRANSITIONS=392} [2024-06-20 15:15:32,758 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-20 15:15:32,758 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 392 transitions, 4490 flow [2024-06-20 15:15:32,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:32,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:32,758 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] [2024-06-20 15:15:32,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:15:32,758 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)] === [2024-06-20 15:15:32,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:32,759 INFO L85 PathProgramCache]: Analyzing trace with hash 282620491, now seen corresponding path program 28 times [2024-06-20 15:15:32,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:32,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011858161] [2024-06-20 15:15:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:32,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:32,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:32,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011858161] [2024-06-20 15:15:32,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011858161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:32,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:32,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:32,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202410673] [2024-06-20 15:15:32,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:32,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:32,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:32,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:32,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:32,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:32,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 392 transitions, 4490 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:32,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:32,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:32,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:33,530 INFO L124 PetriNetUnfolderBase]: 1879/3192 cut-off events. [2024-06-20 15:15:33,530 INFO L125 PetriNetUnfolderBase]: For 200284/200296 co-relation queries the response was YES. [2024-06-20 15:15:33,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20901 conditions, 3192 events. 1879/3192 cut-off events. For 200284/200296 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19507 event pairs, 380 based on Foata normal form. 13/3204 useless extension candidates. Maximal degree in co-relation 20754. Up to 2615 conditions per place. [2024-06-20 15:15:33,570 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 253 selfloop transitions, 162 changer transitions 0/422 dead transitions. [2024-06-20 15:15:33,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 422 transitions, 5601 flow [2024-06-20 15:15:33,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:15:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:15:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2024-06-20 15:15:33,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423076923076923 [2024-06-20 15:15:33,572 INFO L175 Difference]: Start difference. First operand has 325 places, 392 transitions, 4490 flow. Second operand 13 states and 282 transitions. [2024-06-20 15:15:33,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 422 transitions, 5601 flow [2024-06-20 15:15:34,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 422 transitions, 5197 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-20 15:15:34,765 INFO L231 Difference]: Finished difference. Result has 329 places, 395 transitions, 4467 flow [2024-06-20 15:15:34,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4100, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4467, PETRI_PLACES=329, PETRI_TRANSITIONS=395} [2024-06-20 15:15:34,769 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-20 15:15:34,769 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 395 transitions, 4467 flow [2024-06-20 15:15:34,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:34,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:34,769 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] [2024-06-20 15:15:34,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:15:34,769 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)] === [2024-06-20 15:15:34,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:34,770 INFO L85 PathProgramCache]: Analyzing trace with hash 282614911, now seen corresponding path program 29 times [2024-06-20 15:15:34,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:34,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874020648] [2024-06-20 15:15:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:34,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:34,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:34,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874020648] [2024-06-20 15:15:34,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874020648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:34,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:34,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:34,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235118660] [2024-06-20 15:15:34,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:34,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:34,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:34,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:34,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:34,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:34,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 395 transitions, 4467 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:34,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:34,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:34,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:35,601 INFO L124 PetriNetUnfolderBase]: 1876/3188 cut-off events. [2024-06-20 15:15:35,602 INFO L125 PetriNetUnfolderBase]: For 200338/200350 co-relation queries the response was YES. [2024-06-20 15:15:35,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20786 conditions, 3188 events. 1876/3188 cut-off events. For 200338/200350 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19504 event pairs, 380 based on Foata normal form. 13/3200 useless extension candidates. Maximal degree in co-relation 20638. Up to 2612 conditions per place. [2024-06-20 15:15:35,638 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 250 selfloop transitions, 164 changer transitions 0/421 dead transitions. [2024-06-20 15:15:35,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 421 transitions, 5357 flow [2024-06-20 15:15:35,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:15:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:15:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 279 transitions. [2024-06-20 15:15:35,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365384615384615 [2024-06-20 15:15:35,639 INFO L175 Difference]: Start difference. First operand has 329 places, 395 transitions, 4467 flow. Second operand 13 states and 279 transitions. [2024-06-20 15:15:35,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 421 transitions, 5357 flow [2024-06-20 15:15:36,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 421 transitions, 4969 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-20 15:15:36,742 INFO L231 Difference]: Finished difference. Result has 331 places, 395 transitions, 4413 flow [2024-06-20 15:15:36,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4413, PETRI_PLACES=331, PETRI_TRANSITIONS=395} [2024-06-20 15:15:36,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-20 15:15:36,743 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 395 transitions, 4413 flow [2024-06-20 15:15:36,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:36,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:36,743 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] [2024-06-20 15:15:36,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:15:36,744 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)] === [2024-06-20 15:15:36,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:36,744 INFO L85 PathProgramCache]: Analyzing trace with hash -18720449, now seen corresponding path program 30 times [2024-06-20 15:15:36,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:36,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726652094] [2024-06-20 15:15:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:36,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:36,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:36,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726652094] [2024-06-20 15:15:36,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726652094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:36,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:36,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:36,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938165908] [2024-06-20 15:15:36,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:36,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:36,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:36,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:36,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:36,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:36,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 395 transitions, 4413 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:36,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:36,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:36,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:37,447 INFO L124 PetriNetUnfolderBase]: 1873/3181 cut-off events. [2024-06-20 15:15:37,448 INFO L125 PetriNetUnfolderBase]: For 200954/200962 co-relation queries the response was YES. [2024-06-20 15:15:37,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20672 conditions, 3181 events. 1873/3181 cut-off events. For 200954/200962 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19415 event pairs, 402 based on Foata normal form. 6/3185 useless extension candidates. Maximal degree in co-relation 20523. Up to 2521 conditions per place. [2024-06-20 15:15:37,489 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 184 selfloop transitions, 226 changer transitions 0/417 dead transitions. [2024-06-20 15:15:37,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 417 transitions, 5339 flow [2024-06-20 15:15:37,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:15:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:15:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-20 15:15:37,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-20 15:15:37,491 INFO L175 Difference]: Start difference. First operand has 331 places, 395 transitions, 4413 flow. Second operand 12 states and 254 transitions. [2024-06-20 15:15:37,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 417 transitions, 5339 flow [2024-06-20 15:15:38,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 417 transitions, 4931 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-20 15:15:38,588 INFO L231 Difference]: Finished difference. Result has 330 places, 398 transitions, 4531 flow [2024-06-20 15:15:38,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4531, PETRI_PLACES=330, PETRI_TRANSITIONS=398} [2024-06-20 15:15:38,589 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-20 15:15:38,589 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 398 transitions, 4531 flow [2024-06-20 15:15:38,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:38,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:38,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:38,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:15:38,590 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)] === [2024-06-20 15:15:38,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:38,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1473257326, now seen corresponding path program 1 times [2024-06-20 15:15:38,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:38,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002908616] [2024-06-20 15:15:38,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:38,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:38,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:38,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002908616] [2024-06-20 15:15:38,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002908616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:38,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:38,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:38,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767580819] [2024-06-20 15:15:38,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:38,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:38,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:38,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:38,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:38,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:38,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 398 transitions, 4531 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:38,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:38,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:38,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:39,315 INFO L124 PetriNetUnfolderBase]: 1959/3315 cut-off events. [2024-06-20 15:15:39,315 INFO L125 PetriNetUnfolderBase]: For 272580/272588 co-relation queries the response was YES. [2024-06-20 15:15:39,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22952 conditions, 3315 events. 1959/3315 cut-off events. For 272580/272588 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 20224 event pairs, 314 based on Foata normal form. 14/3321 useless extension candidates. Maximal degree in co-relation 22802. Up to 1909 conditions per place. [2024-06-20 15:15:39,359 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 333 selfloop transitions, 101 changer transitions 0/441 dead transitions. [2024-06-20 15:15:39,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 441 transitions, 5967 flow [2024-06-20 15:15:39,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:39,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:15:39,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 15:15:39,360 INFO L175 Difference]: Start difference. First operand has 330 places, 398 transitions, 4531 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:15:39,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 441 transitions, 5967 flow [2024-06-20 15:15:40,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 441 transitions, 5463 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-20 15:15:40,950 INFO L231 Difference]: Finished difference. Result has 328 places, 401 transitions, 4289 flow [2024-06-20 15:15:40,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4289, PETRI_PLACES=328, PETRI_TRANSITIONS=401} [2024-06-20 15:15:40,950 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 287 predicate places. [2024-06-20 15:15:40,950 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 401 transitions, 4289 flow [2024-06-20 15:15:40,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:40,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:40,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:40,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:15:40,951 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)] === [2024-06-20 15:15:40,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:40,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1527871854, now seen corresponding path program 1 times [2024-06-20 15:15:40,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:40,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523073048] [2024-06-20 15:15:40,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:40,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:41,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:41,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523073048] [2024-06-20 15:15:41,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523073048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:41,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:41,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:41,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031172148] [2024-06-20 15:15:41,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:41,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:41,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:41,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:41,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:41,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:41,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 401 transitions, 4289 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:41,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:41,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:41,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:41,820 INFO L124 PetriNetUnfolderBase]: 2079/3518 cut-off events. [2024-06-20 15:15:41,820 INFO L125 PetriNetUnfolderBase]: For 337978/337990 co-relation queries the response was YES. [2024-06-20 15:15:41,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25613 conditions, 3518 events. 2079/3518 cut-off events. For 337978/337990 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 21760 event pairs, 337 based on Foata normal form. 18/3535 useless extension candidates. Maximal degree in co-relation 25462. Up to 2470 conditions per place. [2024-06-20 15:15:41,866 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 337 selfloop transitions, 102 changer transitions 0/446 dead transitions. [2024-06-20 15:15:41,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 446 transitions, 5805 flow [2024-06-20 15:15:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:41,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-20 15:15:41,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-20 15:15:41,867 INFO L175 Difference]: Start difference. First operand has 328 places, 401 transitions, 4289 flow. Second operand 10 states and 233 transitions. [2024-06-20 15:15:41,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 446 transitions, 5805 flow [2024-06-20 15:15:43,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 446 transitions, 5682 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 15:15:43,624 INFO L231 Difference]: Finished difference. Result has 336 places, 406 transitions, 4469 flow [2024-06-20 15:15:43,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4469, PETRI_PLACES=336, PETRI_TRANSITIONS=406} [2024-06-20 15:15:43,625 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-20 15:15:43,625 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 406 transitions, 4469 flow [2024-06-20 15:15:43,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:43,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:43,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:43,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:15:43,626 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)] === [2024-06-20 15:15:43,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:43,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1527871668, now seen corresponding path program 2 times [2024-06-20 15:15:43,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:43,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863557822] [2024-06-20 15:15:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:43,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:43,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:43,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863557822] [2024-06-20 15:15:43,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863557822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:43,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:43,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:43,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319336926] [2024-06-20 15:15:43,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:43,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:43,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:43,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:43,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:43,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:43,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 406 transitions, 4469 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:43,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:43,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:43,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:44,491 INFO L124 PetriNetUnfolderBase]: 2099/3554 cut-off events. [2024-06-20 15:15:44,491 INFO L125 PetriNetUnfolderBase]: For 347734/347746 co-relation queries the response was YES. [2024-06-20 15:15:44,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26124 conditions, 3554 events. 2099/3554 cut-off events. For 347734/347746 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 22071 event pairs, 313 based on Foata normal form. 18/3571 useless extension candidates. Maximal degree in co-relation 25970. Up to 2946 conditions per place. [2024-06-20 15:15:44,541 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 373 selfloop transitions, 57 changer transitions 0/437 dead transitions. [2024-06-20 15:15:44,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 437 transitions, 5433 flow [2024-06-20 15:15:44,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:44,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:15:44,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:15:44,542 INFO L175 Difference]: Start difference. First operand has 336 places, 406 transitions, 4469 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:15:44,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 437 transitions, 5433 flow [2024-06-20 15:15:46,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 437 transitions, 5322 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:46,297 INFO L231 Difference]: Finished difference. Result has 340 places, 407 transitions, 4492 flow [2024-06-20 15:15:46,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4358, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4492, PETRI_PLACES=340, PETRI_TRANSITIONS=407} [2024-06-20 15:15:46,298 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-20 15:15:46,298 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 407 transitions, 4492 flow [2024-06-20 15:15:46,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:46,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:46,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:46,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:15:46,299 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)] === [2024-06-20 15:15:46,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:46,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1705003188, now seen corresponding path program 3 times [2024-06-20 15:15:46,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:46,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231477221] [2024-06-20 15:15:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:46,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:46,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:46,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231477221] [2024-06-20 15:15:46,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231477221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:46,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:46,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:46,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315493641] [2024-06-20 15:15:46,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:46,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:46,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:46,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:46,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 407 transitions, 4492 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:46,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:46,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:46,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:47,154 INFO L124 PetriNetUnfolderBase]: 2176/3681 cut-off events. [2024-06-20 15:15:47,154 INFO L125 PetriNetUnfolderBase]: For 379493/379505 co-relation queries the response was YES. [2024-06-20 15:15:47,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27550 conditions, 3681 events. 2176/3681 cut-off events. For 379493/379505 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 22991 event pairs, 318 based on Foata normal form. 18/3698 useless extension candidates. Maximal degree in co-relation 27394. Up to 2988 conditions per place. [2024-06-20 15:15:47,204 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 375 selfloop transitions, 65 changer transitions 0/447 dead transitions. [2024-06-20 15:15:47,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 447 transitions, 5758 flow [2024-06-20 15:15:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:15:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:15:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-20 15:15:47,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-20 15:15:47,206 INFO L175 Difference]: Start difference. First operand has 340 places, 407 transitions, 4492 flow. Second operand 9 states and 203 transitions. [2024-06-20 15:15:47,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 447 transitions, 5758 flow [2024-06-20 15:15:48,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 447 transitions, 5620 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 15:15:48,623 INFO L231 Difference]: Finished difference. Result has 343 places, 415 transitions, 4595 flow [2024-06-20 15:15:48,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4368, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4595, PETRI_PLACES=343, PETRI_TRANSITIONS=415} [2024-06-20 15:15:48,623 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-20 15:15:48,623 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 415 transitions, 4595 flow [2024-06-20 15:15:48,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:48,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:48,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:48,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:15:48,624 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)] === [2024-06-20 15:15:48,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:48,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1532513484, now seen corresponding path program 2 times [2024-06-20 15:15:48,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:48,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716543277] [2024-06-20 15:15:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:48,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:48,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:48,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716543277] [2024-06-20 15:15:48,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716543277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:48,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:48,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:48,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827733967] [2024-06-20 15:15:48,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:48,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:48,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:48,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:48,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:48,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:48,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 415 transitions, 4595 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:48,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:48,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:48,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:49,483 INFO L124 PetriNetUnfolderBase]: 2262/3823 cut-off events. [2024-06-20 15:15:49,483 INFO L125 PetriNetUnfolderBase]: For 437724/437736 co-relation queries the response was YES. [2024-06-20 15:15:49,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29803 conditions, 3823 events. 2262/3823 cut-off events. For 437724/437736 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 24016 event pairs, 352 based on Foata normal form. 18/3840 useless extension candidates. Maximal degree in co-relation 29646. Up to 2645 conditions per place. [2024-06-20 15:15:49,537 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 347 selfloop transitions, 103 changer transitions 0/457 dead transitions. [2024-06-20 15:15:49,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 457 transitions, 6311 flow [2024-06-20 15:15:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:49,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-20 15:15:49,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-20 15:15:49,538 INFO L175 Difference]: Start difference. First operand has 343 places, 415 transitions, 4595 flow. Second operand 10 states and 232 transitions. [2024-06-20 15:15:49,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 457 transitions, 6311 flow [2024-06-20 15:15:51,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 457 transitions, 6193 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 15:15:51,568 INFO L231 Difference]: Finished difference. Result has 349 places, 418 transitions, 4765 flow [2024-06-20 15:15:51,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4765, PETRI_PLACES=349, PETRI_TRANSITIONS=418} [2024-06-20 15:15:51,568 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-20 15:15:51,568 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 418 transitions, 4765 flow [2024-06-20 15:15:51,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:51,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:51,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:51,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:15:51,569 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)] === [2024-06-20 15:15:51,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:51,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1705240524, now seen corresponding path program 3 times [2024-06-20 15:15:51,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:51,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718238783] [2024-06-20 15:15:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:51,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:51,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:51,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718238783] [2024-06-20 15:15:51,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718238783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:51,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:51,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:51,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182249695] [2024-06-20 15:15:51,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:51,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:51,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:51,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:51,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:51,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:51,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 418 transitions, 4765 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:51,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:51,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:51,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:52,457 INFO L124 PetriNetUnfolderBase]: 2249/3800 cut-off events. [2024-06-20 15:15:52,458 INFO L125 PetriNetUnfolderBase]: For 423145/423157 co-relation queries the response was YES. [2024-06-20 15:15:52,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29287 conditions, 3800 events. 2249/3800 cut-off events. For 423145/423157 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 23778 event pairs, 360 based on Foata normal form. 18/3817 useless extension candidates. Maximal degree in co-relation 29130. Up to 2639 conditions per place. [2024-06-20 15:15:52,509 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 341 selfloop transitions, 106 changer transitions 0/454 dead transitions. [2024-06-20 15:15:52,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 454 transitions, 6193 flow [2024-06-20 15:15:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:15:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:15:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-20 15:15:52,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-20 15:15:52,518 INFO L175 Difference]: Start difference. First operand has 349 places, 418 transitions, 4765 flow. Second operand 10 states and 229 transitions. [2024-06-20 15:15:52,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 454 transitions, 6193 flow [2024-06-20 15:15:54,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 454 transitions, 6027 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:15:54,226 INFO L231 Difference]: Finished difference. Result has 354 places, 418 transitions, 4815 flow [2024-06-20 15:15:54,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4599, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4815, PETRI_PLACES=354, PETRI_TRANSITIONS=418} [2024-06-20 15:15:54,227 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-20 15:15:54,227 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 418 transitions, 4815 flow [2024-06-20 15:15:54,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:54,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:54,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:54,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:15:54,228 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)] === [2024-06-20 15:15:54,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:54,228 INFO L85 PathProgramCache]: Analyzing trace with hash 740101138, now seen corresponding path program 4 times [2024-06-20 15:15:54,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:54,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013989812] [2024-06-20 15:15:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:54,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:54,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:54,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013989812] [2024-06-20 15:15:54,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013989812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:54,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:54,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:54,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483816477] [2024-06-20 15:15:54,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:54,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:54,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:54,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:54,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:54,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:54,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 418 transitions, 4815 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:54,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:54,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:54,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:55,172 INFO L124 PetriNetUnfolderBase]: 2381/4008 cut-off events. [2024-06-20 15:15:55,172 INFO L125 PetriNetUnfolderBase]: For 520983/520991 co-relation queries the response was YES. [2024-06-20 15:15:55,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32496 conditions, 4008 events. 2381/4008 cut-off events. For 520983/520991 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 25326 event pairs, 541 based on Foata normal form. 14/4015 useless extension candidates. Maximal degree in co-relation 32338. Up to 3069 conditions per place. [2024-06-20 15:15:55,219 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 356 selfloop transitions, 98 changer transitions 0/461 dead transitions. [2024-06-20 15:15:55,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 461 transitions, 6335 flow [2024-06-20 15:15:55,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:55,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:15:55,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 15:15:55,221 INFO L175 Difference]: Start difference. First operand has 354 places, 418 transitions, 4815 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:15:55,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 461 transitions, 6335 flow [2024-06-20 15:15:57,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 461 transitions, 6125 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:15:57,115 INFO L231 Difference]: Finished difference. Result has 355 places, 422 transitions, 4891 flow [2024-06-20 15:15:57,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4605, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4891, PETRI_PLACES=355, PETRI_TRANSITIONS=422} [2024-06-20 15:15:57,115 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 314 predicate places. [2024-06-20 15:15:57,115 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 422 transitions, 4891 flow [2024-06-20 15:15:57,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:57,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:15:57,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:15:57,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:15:57,116 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)] === [2024-06-20 15:15:57,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:15:57,116 INFO L85 PathProgramCache]: Analyzing trace with hash 882204208, now seen corresponding path program 5 times [2024-06-20 15:15:57,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:15:57,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126849642] [2024-06-20 15:15:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:15:57,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:15:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:15:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:15:57,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:15:57,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126849642] [2024-06-20 15:15:57,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126849642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:15:57,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:15:57,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:15:57,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477283665] [2024-06-20 15:15:57,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:15:57,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:15:57,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:15:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:15:57,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:15:57,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:15:57,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 422 transitions, 4891 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:15:57,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:15:57,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:15:57,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:15:58,003 INFO L124 PetriNetUnfolderBase]: 2409/4053 cut-off events. [2024-06-20 15:15:58,004 INFO L125 PetriNetUnfolderBase]: For 540813/540821 co-relation queries the response was YES. [2024-06-20 15:15:58,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32973 conditions, 4053 events. 2409/4053 cut-off events. For 540813/540821 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 25609 event pairs, 583 based on Foata normal form. 16/4065 useless extension candidates. Maximal degree in co-relation 32813. Up to 3296 conditions per place. [2024-06-20 15:15:58,062 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 357 selfloop transitions, 95 changer transitions 0/459 dead transitions. [2024-06-20 15:15:58,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 459 transitions, 6169 flow [2024-06-20 15:15:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:15:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:15:58,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:15:58,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 15:15:58,064 INFO L175 Difference]: Start difference. First operand has 355 places, 422 transitions, 4891 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:15:58,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 459 transitions, 6169 flow [2024-06-20 15:16:00,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 459 transitions, 6049 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 15:16:00,315 INFO L231 Difference]: Finished difference. Result has 360 places, 423 transitions, 4987 flow [2024-06-20 15:16:00,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4773, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4987, PETRI_PLACES=360, PETRI_TRANSITIONS=423} [2024-06-20 15:16:00,315 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 319 predicate places. [2024-06-20 15:16:00,315 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 423 transitions, 4987 flow [2024-06-20 15:16:00,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:00,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:00,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:00,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:16:00,316 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)] === [2024-06-20 15:16:00,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:00,316 INFO L85 PathProgramCache]: Analyzing trace with hash -962535718, now seen corresponding path program 6 times [2024-06-20 15:16:00,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:00,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41295846] [2024-06-20 15:16:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:00,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:00,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:00,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41295846] [2024-06-20 15:16:00,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41295846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:00,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:00,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:00,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313906825] [2024-06-20 15:16:00,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:00,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:00,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:00,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:00,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:00,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:00,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 423 transitions, 4987 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:00,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:00,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:00,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:01,240 INFO L124 PetriNetUnfolderBase]: 2437/4099 cut-off events. [2024-06-20 15:16:01,240 INFO L125 PetriNetUnfolderBase]: For 551571/551579 co-relation queries the response was YES. [2024-06-20 15:16:01,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33545 conditions, 4099 events. 2437/4099 cut-off events. For 551571/551579 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 25963 event pairs, 615 based on Foata normal form. 16/4113 useless extension candidates. Maximal degree in co-relation 33383. Up to 3506 conditions per place. [2024-06-20 15:16:01,294 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 351 selfloop transitions, 94 changer transitions 0/452 dead transitions. [2024-06-20 15:16:01,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 452 transitions, 6007 flow [2024-06-20 15:16:01,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:01,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:16:01,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:16:01,295 INFO L175 Difference]: Start difference. First operand has 360 places, 423 transitions, 4987 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:16:01,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 452 transitions, 6007 flow [2024-06-20 15:16:03,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 452 transitions, 5798 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:03,509 INFO L231 Difference]: Finished difference. Result has 362 places, 424 transitions, 4995 flow [2024-06-20 15:16:03,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4782, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4995, PETRI_PLACES=362, PETRI_TRANSITIONS=424} [2024-06-20 15:16:03,510 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-20 15:16:03,510 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 424 transitions, 4995 flow [2024-06-20 15:16:03,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:03,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:03,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:03,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:16:03,510 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)] === [2024-06-20 15:16:03,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:03,511 INFO L85 PathProgramCache]: Analyzing trace with hash 740221294, now seen corresponding path program 4 times [2024-06-20 15:16:03,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:03,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511441767] [2024-06-20 15:16:03,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:03,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:03,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:03,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511441767] [2024-06-20 15:16:03,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511441767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:03,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:03,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:03,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244224688] [2024-06-20 15:16:03,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:03,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:03,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:03,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:03,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:03,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:03,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 424 transitions, 4995 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:03,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:03,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:03,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:04,549 INFO L124 PetriNetUnfolderBase]: 2503/4197 cut-off events. [2024-06-20 15:16:04,549 INFO L125 PetriNetUnfolderBase]: For 590757/590769 co-relation queries the response was YES. [2024-06-20 15:16:04,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35103 conditions, 4197 events. 2503/4197 cut-off events. For 590757/590769 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26650 event pairs, 599 based on Foata normal form. 18/4205 useless extension candidates. Maximal degree in co-relation 34940. Up to 3571 conditions per place. [2024-06-20 15:16:04,611 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 362 selfloop transitions, 93 changer transitions 0/462 dead transitions. [2024-06-20 15:16:04,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 462 transitions, 6296 flow [2024-06-20 15:16:04,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:16:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:16:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-20 15:16:04,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590909090909091 [2024-06-20 15:16:04,613 INFO L175 Difference]: Start difference. First operand has 362 places, 424 transitions, 4995 flow. Second operand 11 states and 246 transitions. [2024-06-20 15:16:04,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 462 transitions, 6296 flow [2024-06-20 15:16:06,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 462 transitions, 6107 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:06,922 INFO L231 Difference]: Finished difference. Result has 368 places, 426 transitions, 5071 flow [2024-06-20 15:16:06,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4806, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5071, PETRI_PLACES=368, PETRI_TRANSITIONS=426} [2024-06-20 15:16:06,923 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-20 15:16:06,923 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 426 transitions, 5071 flow [2024-06-20 15:16:06,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:06,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:06,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:06,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:16:06,924 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)] === [2024-06-20 15:16:06,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:06,924 INFO L85 PathProgramCache]: Analyzing trace with hash 740221108, now seen corresponding path program 7 times [2024-06-20 15:16:06,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:06,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147119705] [2024-06-20 15:16:06,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:06,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:07,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:07,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147119705] [2024-06-20 15:16:07,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147119705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:07,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:07,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:07,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122032913] [2024-06-20 15:16:07,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:07,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:07,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:07,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:07,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:07,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:07,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 426 transitions, 5071 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:07,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:07,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:07,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:07,899 INFO L124 PetriNetUnfolderBase]: 2490/4184 cut-off events. [2024-06-20 15:16:07,900 INFO L125 PetriNetUnfolderBase]: For 576651/576663 co-relation queries the response was YES. [2024-06-20 15:16:07,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34613 conditions, 4184 events. 2490/4184 cut-off events. For 576651/576663 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26619 event pairs, 592 based on Foata normal form. 18/4190 useless extension candidates. Maximal degree in co-relation 34448. Up to 3678 conditions per place. [2024-06-20 15:16:07,959 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 401 selfloop transitions, 47 changer transitions 0/455 dead transitions. [2024-06-20 15:16:07,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 455 transitions, 6055 flow [2024-06-20 15:16:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 15:16:07,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-20 15:16:07,961 INFO L175 Difference]: Start difference. First operand has 368 places, 426 transitions, 5071 flow. Second operand 8 states and 185 transitions. [2024-06-20 15:16:07,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 455 transitions, 6055 flow [2024-06-20 15:16:10,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 455 transitions, 5886 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:10,232 INFO L231 Difference]: Finished difference. Result has 369 places, 426 transitions, 5000 flow [2024-06-20 15:16:10,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5000, PETRI_PLACES=369, PETRI_TRANSITIONS=426} [2024-06-20 15:16:10,233 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-20 15:16:10,233 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 426 transitions, 5000 flow [2024-06-20 15:16:10,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:10,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:10,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:10,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:16:10,233 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)] === [2024-06-20 15:16:10,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:10,234 INFO L85 PathProgramCache]: Analyzing trace with hash -553870406, now seen corresponding path program 8 times [2024-06-20 15:16:10,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:10,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952884664] [2024-06-20 15:16:10,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:10,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:10,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:10,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952884664] [2024-06-20 15:16:10,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952884664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:10,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:10,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:10,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861709245] [2024-06-20 15:16:10,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:10,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:10,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:10,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:10,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:10,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:10,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 426 transitions, 5000 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:10,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:10,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:10,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:11,293 INFO L124 PetriNetUnfolderBase]: 2564/4307 cut-off events. [2024-06-20 15:16:11,293 INFO L125 PetriNetUnfolderBase]: For 626398/626410 co-relation queries the response was YES. [2024-06-20 15:16:11,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36162 conditions, 4307 events. 2564/4307 cut-off events. For 626398/626410 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 27511 event pairs, 619 based on Foata normal form. 18/4322 useless extension candidates. Maximal degree in co-relation 35996. Up to 3769 conditions per place. [2024-06-20 15:16:11,351 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 48 changer transitions 0/460 dead transitions. [2024-06-20 15:16:11,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 460 transitions, 6295 flow [2024-06-20 15:16:11,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:11,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-20 15:16:11,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-20 15:16:11,352 INFO L175 Difference]: Start difference. First operand has 369 places, 426 transitions, 5000 flow. Second operand 9 states and 203 transitions. [2024-06-20 15:16:11,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 460 transitions, 6295 flow [2024-06-20 15:16:14,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 460 transitions, 6192 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:14,021 INFO L231 Difference]: Finished difference. Result has 373 places, 430 transitions, 5078 flow [2024-06-20 15:16:14,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4901, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5078, PETRI_PLACES=373, PETRI_TRANSITIONS=430} [2024-06-20 15:16:14,022 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-20 15:16:14,022 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 430 transitions, 5078 flow [2024-06-20 15:16:14,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:14,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:14,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:14,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:16:14,022 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)] === [2024-06-20 15:16:14,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:14,023 INFO L85 PathProgramCache]: Analyzing trace with hash 747630604, now seen corresponding path program 5 times [2024-06-20 15:16:14,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:14,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212509968] [2024-06-20 15:16:14,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:14,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:14,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:14,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212509968] [2024-06-20 15:16:14,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212509968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:14,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:14,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:14,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056431683] [2024-06-20 15:16:14,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:14,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:14,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:14,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:14,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:14,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:14,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 430 transitions, 5078 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:14,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:14,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:14,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:15,053 INFO L124 PetriNetUnfolderBase]: 2630/4409 cut-off events. [2024-06-20 15:16:15,053 INFO L125 PetriNetUnfolderBase]: For 679046/679058 co-relation queries the response was YES. [2024-06-20 15:16:15,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37980 conditions, 4409 events. 2630/4409 cut-off events. For 679046/679058 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 28222 event pairs, 635 based on Foata normal form. 18/4424 useless extension candidates. Maximal degree in co-relation 37812. Up to 3822 conditions per place. [2024-06-20 15:16:15,120 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 367 selfloop transitions, 91 changer transitions 0/465 dead transitions. [2024-06-20 15:16:15,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 465 transitions, 6390 flow [2024-06-20 15:16:15,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:16:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:16:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 260 transitions. [2024-06-20 15:16:15,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-20 15:16:15,122 INFO L175 Difference]: Start difference. First operand has 373 places, 430 transitions, 5078 flow. Second operand 12 states and 260 transitions. [2024-06-20 15:16:15,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 465 transitions, 6390 flow [2024-06-20 15:16:17,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 465 transitions, 6292 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:17,899 INFO L231 Difference]: Finished difference. Result has 379 places, 432 transitions, 5226 flow [2024-06-20 15:16:17,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4980, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5226, PETRI_PLACES=379, PETRI_TRANSITIONS=432} [2024-06-20 15:16:17,899 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-20 15:16:17,900 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 432 transitions, 5226 flow [2024-06-20 15:16:17,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:17,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:17,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:17,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:16:17,900 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)] === [2024-06-20 15:16:17,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:17,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1006066258, now seen corresponding path program 9 times [2024-06-20 15:16:17,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:17,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864060388] [2024-06-20 15:16:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:17,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:18,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:18,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864060388] [2024-06-20 15:16:18,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864060388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:18,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:18,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:18,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066015267] [2024-06-20 15:16:18,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:18,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:18,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:18,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:18,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:18,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:18,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 432 transitions, 5226 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:18,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:18,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:18,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:18,916 INFO L124 PetriNetUnfolderBase]: 2612/4389 cut-off events. [2024-06-20 15:16:18,917 INFO L125 PetriNetUnfolderBase]: For 664208/664220 co-relation queries the response was YES. [2024-06-20 15:16:18,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37231 conditions, 4389 events. 2612/4389 cut-off events. For 664208/664220 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 28184 event pairs, 637 based on Foata normal form. 20/4408 useless extension candidates. Maximal degree in co-relation 37062. Up to 3893 conditions per place. [2024-06-20 15:16:18,981 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 45 changer transitions 0/457 dead transitions. [2024-06-20 15:16:18,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 457 transitions, 6226 flow [2024-06-20 15:16:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:16:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:16:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 15:16:18,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-20 15:16:18,982 INFO L175 Difference]: Start difference. First operand has 379 places, 432 transitions, 5226 flow. Second operand 8 states and 182 transitions. [2024-06-20 15:16:18,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 457 transitions, 6226 flow [2024-06-20 15:16:21,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 457 transitions, 6097 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 15:16:21,974 INFO L231 Difference]: Finished difference. Result has 379 places, 432 transitions, 5192 flow [2024-06-20 15:16:21,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5097, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5192, PETRI_PLACES=379, PETRI_TRANSITIONS=432} [2024-06-20 15:16:21,974 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-20 15:16:21,975 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 432 transitions, 5192 flow [2024-06-20 15:16:21,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:21,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:21,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:21,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:16:21,975 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)] === [2024-06-20 15:16:21,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:21,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1006245004, now seen corresponding path program 6 times [2024-06-20 15:16:21,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:21,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023866237] [2024-06-20 15:16:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:21,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:22,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:22,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023866237] [2024-06-20 15:16:22,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023866237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:22,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:22,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:22,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877038509] [2024-06-20 15:16:22,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:22,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:22,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:22,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:22,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:22,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:22,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 432 transitions, 5192 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:22,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:22,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:22,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:23,046 INFO L124 PetriNetUnfolderBase]: 2594/4367 cut-off events. [2024-06-20 15:16:23,046 INFO L125 PetriNetUnfolderBase]: For 634886/634898 co-relation queries the response was YES. [2024-06-20 15:16:23,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36323 conditions, 4367 events. 2594/4367 cut-off events. For 634886/634898 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 28054 event pairs, 631 based on Foata normal form. 20/4386 useless extension candidates. Maximal degree in co-relation 36152. Up to 3818 conditions per place. [2024-06-20 15:16:23,109 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 365 selfloop transitions, 88 changer transitions 0/460 dead transitions. [2024-06-20 15:16:23,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 460 transitions, 6208 flow [2024-06-20 15:16:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:16:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:16:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-20 15:16:23,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431818181818182 [2024-06-20 15:16:23,110 INFO L175 Difference]: Start difference. First operand has 379 places, 432 transitions, 5192 flow. Second operand 11 states and 239 transitions. [2024-06-20 15:16:23,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 460 transitions, 6208 flow [2024-06-20 15:16:26,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 460 transitions, 6113 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:26,135 INFO L231 Difference]: Finished difference. Result has 384 places, 432 transitions, 5278 flow [2024-06-20 15:16:26,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5097, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5278, PETRI_PLACES=384, PETRI_TRANSITIONS=432} [2024-06-20 15:16:26,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-20 15:16:26,136 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 432 transitions, 5278 flow [2024-06-20 15:16:26,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:26,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:26,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:26,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:16:26,137 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)] === [2024-06-20 15:16:26,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:26,137 INFO L85 PathProgramCache]: Analyzing trace with hash 235415692, now seen corresponding path program 7 times [2024-06-20 15:16:26,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:26,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000787708] [2024-06-20 15:16:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:26,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:26,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:26,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000787708] [2024-06-20 15:16:26,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000787708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:26,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:26,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:26,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778503469] [2024-06-20 15:16:26,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:26,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:26,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:26,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:26,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:26,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:26,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 432 transitions, 5278 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:26,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:26,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:26,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:27,169 INFO L124 PetriNetUnfolderBase]: 2776/4639 cut-off events. [2024-06-20 15:16:27,169 INFO L125 PetriNetUnfolderBase]: For 764493/764505 co-relation queries the response was YES. [2024-06-20 15:16:27,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41084 conditions, 4639 events. 2776/4639 cut-off events. For 764493/764505 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 29950 event pairs, 649 based on Foata normal form. 18/4650 useless extension candidates. Maximal degree in co-relation 40912. Up to 3774 conditions per place. [2024-06-20 15:16:27,240 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 372 selfloop transitions, 97 changer transitions 0/476 dead transitions. [2024-06-20 15:16:27,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 476 transitions, 6988 flow [2024-06-20 15:16:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:16:27,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:16:27,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-20 15:16:27,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-20 15:16:27,241 INFO L175 Difference]: Start difference. First operand has 384 places, 432 transitions, 5278 flow. Second operand 11 states and 245 transitions. [2024-06-20 15:16:27,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 476 transitions, 6988 flow [2024-06-20 15:16:30,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 476 transitions, 6813 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 15:16:30,585 INFO L231 Difference]: Finished difference. Result has 388 places, 440 transitions, 5506 flow [2024-06-20 15:16:30,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5103, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5506, PETRI_PLACES=388, PETRI_TRANSITIONS=440} [2024-06-20 15:16:30,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-20 15:16:30,586 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 440 transitions, 5506 flow [2024-06-20 15:16:30,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:30,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:30,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:30,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:16:30,586 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)] === [2024-06-20 15:16:30,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:30,587 INFO L85 PathProgramCache]: Analyzing trace with hash -657948492, now seen corresponding path program 10 times [2024-06-20 15:16:30,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:30,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525777504] [2024-06-20 15:16:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:30,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:30,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:30,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525777504] [2024-06-20 15:16:30,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525777504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:30,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:30,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:30,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257013859] [2024-06-20 15:16:30,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:30,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:30,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:30,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:30,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:30,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:30,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 440 transitions, 5506 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:30,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:30,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:30,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:31,717 INFO L124 PetriNetUnfolderBase]: 2921/4864 cut-off events. [2024-06-20 15:16:31,717 INFO L125 PetriNetUnfolderBase]: For 900603/900615 co-relation queries the response was YES. [2024-06-20 15:16:31,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45378 conditions, 4864 events. 2921/4864 cut-off events. For 900603/900615 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31620 event pairs, 712 based on Foata normal form. 18/4873 useless extension candidates. Maximal degree in co-relation 45203. Up to 4141 conditions per place. [2024-06-20 15:16:31,796 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 62 changer transitions 0/474 dead transitions. [2024-06-20 15:16:31,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 474 transitions, 6870 flow [2024-06-20 15:16:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-20 15:16:31,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-20 15:16:31,797 INFO L175 Difference]: Start difference. First operand has 388 places, 440 transitions, 5506 flow. Second operand 9 states and 201 transitions. [2024-06-20 15:16:31,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 474 transitions, 6870 flow [2024-06-20 15:16:35,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 474 transitions, 6749 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:16:35,431 INFO L231 Difference]: Finished difference. Result has 392 places, 446 transitions, 5649 flow [2024-06-20 15:16:35,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5385, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5649, PETRI_PLACES=392, PETRI_TRANSITIONS=446} [2024-06-20 15:16:35,432 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-20 15:16:35,432 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 446 transitions, 5649 flow [2024-06-20 15:16:35,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:35,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:35,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:35,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:16:35,433 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)] === [2024-06-20 15:16:35,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:35,433 INFO L85 PathProgramCache]: Analyzing trace with hash -569234862, now seen corresponding path program 11 times [2024-06-20 15:16:35,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:35,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761603911] [2024-06-20 15:16:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:35,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:35,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:35,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761603911] [2024-06-20 15:16:35,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761603911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:35,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:35,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:35,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913085031] [2024-06-20 15:16:35,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:35,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:35,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:35,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:35,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:35,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:35,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 446 transitions, 5649 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:35,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:35,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:35,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:36,582 INFO L124 PetriNetUnfolderBase]: 2903/4850 cut-off events. [2024-06-20 15:16:36,582 INFO L125 PetriNetUnfolderBase]: For 885480/885492 co-relation queries the response was YES. [2024-06-20 15:16:36,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44887 conditions, 4850 events. 2903/4850 cut-off events. For 885480/885492 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31588 event pairs, 722 based on Foata normal form. 20/4869 useless extension candidates. Maximal degree in co-relation 44709. Up to 4336 conditions per place. [2024-06-20 15:16:36,655 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 411 selfloop transitions, 51 changer transitions 0/469 dead transitions. [2024-06-20 15:16:36,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 469 transitions, 6667 flow [2024-06-20 15:16:36,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:16:36,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:16:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-20 15:16:36,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-20 15:16:36,657 INFO L175 Difference]: Start difference. First operand has 392 places, 446 transitions, 5649 flow. Second operand 9 states and 197 transitions. [2024-06-20 15:16:36,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 469 transitions, 6667 flow [2024-06-20 15:16:40,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 469 transitions, 6554 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:16:40,547 INFO L231 Difference]: Finished difference. Result has 396 places, 446 transitions, 5643 flow [2024-06-20 15:16:40,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5536, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5643, PETRI_PLACES=396, PETRI_TRANSITIONS=446} [2024-06-20 15:16:40,547 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-20 15:16:40,547 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 446 transitions, 5643 flow [2024-06-20 15:16:40,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:40,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:40,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:40,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:16:40,548 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)] === [2024-06-20 15:16:40,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:40,548 INFO L85 PathProgramCache]: Analyzing trace with hash -569056116, now seen corresponding path program 8 times [2024-06-20 15:16:40,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:40,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615371244] [2024-06-20 15:16:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:40,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:40,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:40,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615371244] [2024-06-20 15:16:40,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615371244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:40,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:40,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:40,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729905191] [2024-06-20 15:16:40,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:40,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:40,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:40,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:40,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:40,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:40,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 446 transitions, 5643 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:40,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:40,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:40,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:41,786 INFO L124 PetriNetUnfolderBase]: 2931/4898 cut-off events. [2024-06-20 15:16:41,786 INFO L125 PetriNetUnfolderBase]: For 902597/902609 co-relation queries the response was YES. [2024-06-20 15:16:41,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45308 conditions, 4898 events. 2931/4898 cut-off events. For 902597/902609 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32005 event pairs, 728 based on Foata normal form. 20/4917 useless extension candidates. Maximal degree in co-relation 45129. Up to 4337 conditions per place. [2024-06-20 15:16:41,862 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 380 selfloop transitions, 86 changer transitions 0/473 dead transitions. [2024-06-20 15:16:41,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 473 transitions, 6713 flow [2024-06-20 15:16:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:16:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:16:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-20 15:16:41,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-20 15:16:41,863 INFO L175 Difference]: Start difference. First operand has 396 places, 446 transitions, 5643 flow. Second operand 12 states and 255 transitions. [2024-06-20 15:16:41,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 473 transitions, 6713 flow [2024-06-20 15:16:45,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 473 transitions, 6606 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:45,708 INFO L231 Difference]: Finished difference. Result has 401 places, 447 transitions, 5749 flow [2024-06-20 15:16:45,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5536, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5749, PETRI_PLACES=401, PETRI_TRANSITIONS=447} [2024-06-20 15:16:45,708 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-20 15:16:45,708 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 447 transitions, 5749 flow [2024-06-20 15:16:45,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:45,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:45,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:45,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 15:16:45,709 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)] === [2024-06-20 15:16:45,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:45,709 INFO L85 PathProgramCache]: Analyzing trace with hash -657711156, now seen corresponding path program 9 times [2024-06-20 15:16:45,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:45,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060315676] [2024-06-20 15:16:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:45,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:45,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:45,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060315676] [2024-06-20 15:16:45,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060315676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:45,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:45,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:45,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669536790] [2024-06-20 15:16:45,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:45,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:45,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:45,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:45,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:45,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:45,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 447 transitions, 5749 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:45,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:45,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:45,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:47,059 INFO L124 PetriNetUnfolderBase]: 3017/5024 cut-off events. [2024-06-20 15:16:47,059 INFO L125 PetriNetUnfolderBase]: For 976404/976416 co-relation queries the response was YES. [2024-06-20 15:16:47,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47949 conditions, 5024 events. 3017/5024 cut-off events. For 976404/976416 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32836 event pairs, 706 based on Foata normal form. 18/5033 useless extension candidates. Maximal degree in co-relation 47769. Up to 4035 conditions per place. [2024-06-20 15:16:47,127 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 373 selfloop transitions, 103 changer transitions 0/483 dead transitions. [2024-06-20 15:16:47,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 483 transitions, 7381 flow [2024-06-20 15:16:47,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:16:47,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:16:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-20 15:16:47,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-20 15:16:47,129 INFO L175 Difference]: Start difference. First operand has 401 places, 447 transitions, 5749 flow. Second operand 11 states and 244 transitions. [2024-06-20 15:16:47,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 483 transitions, 7381 flow [2024-06-20 15:16:51,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 483 transitions, 7200 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 15:16:51,416 INFO L231 Difference]: Finished difference. Result has 402 places, 450 transitions, 5876 flow [2024-06-20 15:16:51,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5568, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5876, PETRI_PLACES=402, PETRI_TRANSITIONS=450} [2024-06-20 15:16:51,417 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-20 15:16:51,417 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 450 transitions, 5876 flow [2024-06-20 15:16:51,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:51,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:51,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:51,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 15:16:51,418 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)] === [2024-06-20 15:16:51,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:51,418 INFO L85 PathProgramCache]: Analyzing trace with hash -144599782, now seen corresponding path program 12 times [2024-06-20 15:16:51,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:51,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399801469] [2024-06-20 15:16:51,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:51,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:51,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:51,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399801469] [2024-06-20 15:16:51,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399801469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:51,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:51,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:51,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507274336] [2024-06-20 15:16:51,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:51,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:51,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:51,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:51,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:51,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 450 transitions, 5876 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:51,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:51,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:51,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:52,617 INFO L124 PetriNetUnfolderBase]: 3004/5011 cut-off events. [2024-06-20 15:16:52,617 INFO L125 PetriNetUnfolderBase]: For 963135/963147 co-relation queries the response was YES. [2024-06-20 15:16:52,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47490 conditions, 5011 events. 3004/5011 cut-off events. For 963135/963147 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32857 event pairs, 749 based on Foata normal form. 18/5026 useless extension candidates. Maximal degree in co-relation 47309. Up to 4465 conditions per place. [2024-06-20 15:16:52,694 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 416 selfloop transitions, 54 changer transitions 0/477 dead transitions. [2024-06-20 15:16:52,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 477 transitions, 6936 flow [2024-06-20 15:16:52,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:16:52,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:16:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-20 15:16:52,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-20 15:16:52,695 INFO L175 Difference]: Start difference. First operand has 402 places, 450 transitions, 5876 flow. Second operand 10 states and 217 transitions. [2024-06-20 15:16:52,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 477 transitions, 6936 flow [2024-06-20 15:16:57,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 477 transitions, 6750 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:16:57,543 INFO L231 Difference]: Finished difference. Result has 405 places, 450 transitions, 5802 flow [2024-06-20 15:16:57,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5690, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5802, PETRI_PLACES=405, PETRI_TRANSITIONS=450} [2024-06-20 15:16:57,544 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-20 15:16:57,544 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 450 transitions, 5802 flow [2024-06-20 15:16:57,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:57,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:16:57,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:16:57,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 15:16:57,544 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)] === [2024-06-20 15:16:57,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:16:57,545 INFO L85 PathProgramCache]: Analyzing trace with hash -181467648, now seen corresponding path program 10 times [2024-06-20 15:16:57,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:16:57,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997515117] [2024-06-20 15:16:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:16:57,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:16:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:16:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:16:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:16:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997515117] [2024-06-20 15:16:57,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997515117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:16:57,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:16:57,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:16:57,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900318537] [2024-06-20 15:16:57,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:16:57,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:16:57,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:16:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:16:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:16:57,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:16:57,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 450 transitions, 5802 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:16:57,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:16:57,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:16:57,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:16:58,785 INFO L124 PetriNetUnfolderBase]: 2991/4992 cut-off events. [2024-06-20 15:16:58,785 INFO L125 PetriNetUnfolderBase]: For 942976/942988 co-relation queries the response was YES. [2024-06-20 15:16:58,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46529 conditions, 4992 events. 2991/4992 cut-off events. For 942976/942988 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32720 event pairs, 742 based on Foata normal form. 18/5007 useless extension candidates. Maximal degree in co-relation 46347. Up to 4353 conditions per place. [2024-06-20 15:16:58,862 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 383 selfloop transitions, 90 changer transitions 0/480 dead transitions. [2024-06-20 15:16:58,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 480 transitions, 7096 flow [2024-06-20 15:16:58,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:16:58,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:16:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-20 15:16:58,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-20 15:16:58,864 INFO L175 Difference]: Start difference. First operand has 405 places, 450 transitions, 5802 flow. Second operand 12 states and 258 transitions. [2024-06-20 15:16:58,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 480 transitions, 7096 flow [2024-06-20 15:17:03,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 480 transitions, 6984 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 15:17:03,554 INFO L231 Difference]: Finished difference. Result has 410 places, 450 transitions, 5874 flow [2024-06-20 15:17:03,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5690, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5874, PETRI_PLACES=410, PETRI_TRANSITIONS=450} [2024-06-20 15:17:03,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-20 15:17:03,555 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 450 transitions, 5874 flow [2024-06-20 15:17:03,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:03,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:03,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:03,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 15:17:03,556 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)] === [2024-06-20 15:17:03,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:03,556 INFO L85 PathProgramCache]: Analyzing trace with hash -814718542, now seen corresponding path program 11 times [2024-06-20 15:17:03,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:03,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356453410] [2024-06-20 15:17:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:03,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:03,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:03,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356453410] [2024-06-20 15:17:03,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356453410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:03,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:03,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:17:03,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661799298] [2024-06-20 15:17:03,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:03,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:17:03,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:03,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:17:03,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:17:03,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:03,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 450 transitions, 5874 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:03,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:03,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:03,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:04,761 INFO L124 PetriNetUnfolderBase]: 2973/4968 cut-off events. [2024-06-20 15:17:04,762 INFO L125 PetriNetUnfolderBase]: For 925465/925477 co-relation queries the response was YES. [2024-06-20 15:17:04,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45638 conditions, 4968 events. 2973/4968 cut-off events. For 925465/925477 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32568 event pairs, 742 based on Foata normal form. 20/4987 useless extension candidates. Maximal degree in co-relation 45455. Up to 4407 conditions per place. [2024-06-20 15:17:04,836 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 382 selfloop transitions, 85 changer transitions 0/474 dead transitions. [2024-06-20 15:17:04,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 474 transitions, 6908 flow [2024-06-20 15:17:04,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-20 15:17:04,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5475 [2024-06-20 15:17:04,838 INFO L175 Difference]: Start difference. First operand has 410 places, 450 transitions, 5874 flow. Second operand 10 states and 219 transitions. [2024-06-20 15:17:04,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 474 transitions, 6908 flow [2024-06-20 15:17:09,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 474 transitions, 6717 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-20 15:17:09,587 INFO L231 Difference]: Finished difference. Result has 411 places, 450 transitions, 5858 flow [2024-06-20 15:17:09,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5858, PETRI_PLACES=411, PETRI_TRANSITIONS=450} [2024-06-20 15:17:09,587 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-20 15:17:09,587 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 450 transitions, 5858 flow [2024-06-20 15:17:09,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:09,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:09,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:09,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 15:17:09,588 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)] === [2024-06-20 15:17:09,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:09,588 INFO L85 PathProgramCache]: Analyzing trace with hash -344011926, now seen corresponding path program 12 times [2024-06-20 15:17:09,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:09,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501861321] [2024-06-20 15:17:09,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:09,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:09,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:09,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501861321] [2024-06-20 15:17:09,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501861321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:09,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:09,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:17:09,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068090326] [2024-06-20 15:17:09,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:09,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:17:09,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:09,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:17:09,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:17:09,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:09,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 450 transitions, 5858 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:09,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:09,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:09,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:10,764 INFO L124 PetriNetUnfolderBase]: 2955/4942 cut-off events. [2024-06-20 15:17:10,764 INFO L125 PetriNetUnfolderBase]: For 891835/891847 co-relation queries the response was YES. [2024-06-20 15:17:10,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44541 conditions, 4942 events. 2955/4942 cut-off events. For 891835/891847 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32391 event pairs, 718 based on Foata normal form. 20/4961 useless extension candidates. Maximal degree in co-relation 44357. Up to 4191 conditions per place. [2024-06-20 15:17:10,843 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 383 selfloop transitions, 89 changer transitions 0/479 dead transitions. [2024-06-20 15:17:10,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 479 transitions, 7174 flow [2024-06-20 15:17:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-20 15:17:10,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-20 15:17:10,844 INFO L175 Difference]: Start difference. First operand has 411 places, 450 transitions, 5858 flow. Second operand 10 states and 223 transitions. [2024-06-20 15:17:10,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 479 transitions, 7174 flow [2024-06-20 15:17:15,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 479 transitions, 6995 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:15,520 INFO L231 Difference]: Finished difference. Result has 413 places, 450 transitions, 5861 flow [2024-06-20 15:17:15,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5679, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5861, PETRI_PLACES=413, PETRI_TRANSITIONS=450} [2024-06-20 15:17:15,521 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-20 15:17:15,521 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 450 transitions, 5861 flow [2024-06-20 15:17:15,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:15,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:15,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:15,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 15:17:15,522 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)] === [2024-06-20 15:17:15,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:15,522 INFO L85 PathProgramCache]: Analyzing trace with hash 442866510, now seen corresponding path program 13 times [2024-06-20 15:17:15,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:15,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966768085] [2024-06-20 15:17:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:15,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:15,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:15,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966768085] [2024-06-20 15:17:15,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966768085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:15,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:15,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:17:15,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708924063] [2024-06-20 15:17:15,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:15,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:17:15,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:15,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:17:15,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:17:15,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:15,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 450 transitions, 5861 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:15,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:15,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:15,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:16,721 INFO L124 PetriNetUnfolderBase]: 3062/5106 cut-off events. [2024-06-20 15:17:16,721 INFO L125 PetriNetUnfolderBase]: For 996443/996451 co-relation queries the response was YES. [2024-06-20 15:17:16,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47429 conditions, 5106 events. 3062/5106 cut-off events. For 996443/996451 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 33568 event pairs, 774 based on Foata normal form. 16/5120 useless extension candidates. Maximal degree in co-relation 47244. Up to 4312 conditions per place. [2024-06-20 15:17:16,800 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 404 selfloop transitions, 74 changer transitions 0/485 dead transitions. [2024-06-20 15:17:16,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 485 transitions, 7263 flow [2024-06-20 15:17:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:17:16,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-20 15:17:16,801 INFO L175 Difference]: Start difference. First operand has 413 places, 450 transitions, 5861 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:17:16,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 485 transitions, 7263 flow [2024-06-20 15:17:22,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 485 transitions, 7091 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:22,955 INFO L231 Difference]: Finished difference. Result has 413 places, 453 transitions, 5926 flow [2024-06-20 15:17:22,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5689, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5926, PETRI_PLACES=413, PETRI_TRANSITIONS=453} [2024-06-20 15:17:22,956 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-20 15:17:22,956 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 453 transitions, 5926 flow [2024-06-20 15:17:22,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:22,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:22,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:22,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 15:17:22,957 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)] === [2024-06-20 15:17:22,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash 451437390, now seen corresponding path program 14 times [2024-06-20 15:17:22,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:22,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458030156] [2024-06-20 15:17:22,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:22,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:23,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:23,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458030156] [2024-06-20 15:17:23,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458030156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:23,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:23,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:17:23,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32929886] [2024-06-20 15:17:23,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:23,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:17:23,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:23,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:17:23,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:17:23,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:23,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 453 transitions, 5926 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:23,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:23,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:23,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:24,141 INFO L124 PetriNetUnfolderBase]: 3090/5150 cut-off events. [2024-06-20 15:17:24,141 INFO L125 PetriNetUnfolderBase]: For 1015699/1015707 co-relation queries the response was YES. [2024-06-20 15:17:24,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48015 conditions, 5150 events. 3090/5150 cut-off events. For 1015699/1015707 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 33910 event pairs, 794 based on Foata normal form. 16/5164 useless extension candidates. Maximal degree in co-relation 47828. Up to 4564 conditions per place. [2024-06-20 15:17:24,225 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 399 selfloop transitions, 72 changer transitions 0/478 dead transitions. [2024-06-20 15:17:24,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 478 transitions, 6993 flow [2024-06-20 15:17:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:17:24,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-20 15:17:24,226 INFO L175 Difference]: Start difference. First operand has 413 places, 453 transitions, 5926 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:17:24,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 478 transitions, 6993 flow [2024-06-20 15:17:29,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 478 transitions, 6883 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-20 15:17:29,748 INFO L231 Difference]: Finished difference. Result has 417 places, 454 transitions, 5994 flow [2024-06-20 15:17:29,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5822, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5994, PETRI_PLACES=417, PETRI_TRANSITIONS=454} [2024-06-20 15:17:29,749 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 376 predicate places. [2024-06-20 15:17:29,749 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 454 transitions, 5994 flow [2024-06-20 15:17:29,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:29,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:29,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:29,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 15:17:29,750 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)] === [2024-06-20 15:17:29,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:29,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1301146394, now seen corresponding path program 15 times [2024-06-20 15:17:29,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:29,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545175762] [2024-06-20 15:17:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:29,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:29,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:29,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545175762] [2024-06-20 15:17:29,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545175762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:29,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:29,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:17:29,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361712638] [2024-06-20 15:17:29,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:29,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:17:29,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:29,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:17:29,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:17:29,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:29,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 454 transitions, 5994 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:29,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:29,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:29,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:31,041 INFO L124 PetriNetUnfolderBase]: 3151/5246 cut-off events. [2024-06-20 15:17:31,042 INFO L125 PetriNetUnfolderBase]: For 1070904/1070916 co-relation queries the response was YES. [2024-06-20 15:17:31,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49517 conditions, 5246 events. 3151/5246 cut-off events. For 1070904/1070916 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 34616 event pairs, 786 based on Foata normal form. 20/5265 useless extension candidates. Maximal degree in co-relation 49328. Up to 4483 conditions per place. [2024-06-20 15:17:31,124 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 412 selfloop transitions, 77 changer transitions 0/496 dead transitions. [2024-06-20 15:17:31,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 496 transitions, 7424 flow [2024-06-20 15:17:31,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:17:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:17:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-20 15:17:31,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:17:31,125 INFO L175 Difference]: Start difference. First operand has 417 places, 454 transitions, 5994 flow. Second operand 9 states and 216 transitions. [2024-06-20 15:17:31,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 496 transitions, 7424 flow [2024-06-20 15:17:36,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 496 transitions, 7277 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:17:36,621 INFO L231 Difference]: Finished difference. Result has 421 places, 456 transitions, 6059 flow [2024-06-20 15:17:36,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5847, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6059, PETRI_PLACES=421, PETRI_TRANSITIONS=456} [2024-06-20 15:17:36,621 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 380 predicate places. [2024-06-20 15:17:36,621 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 456 transitions, 6059 flow [2024-06-20 15:17:36,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:36,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:36,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:36,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 15:17:36,622 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)] === [2024-06-20 15:17:36,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:36,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1309717274, now seen corresponding path program 16 times [2024-06-20 15:17:36,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:36,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102750975] [2024-06-20 15:17:36,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:36,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:36,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:36,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102750975] [2024-06-20 15:17:36,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102750975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:36,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:36,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:17:36,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667642671] [2024-06-20 15:17:36,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:36,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:17:36,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:17:36,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:17:36,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:36,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 456 transitions, 6059 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:36,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:36,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:36,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:37,987 INFO L124 PetriNetUnfolderBase]: 3179/5290 cut-off events. [2024-06-20 15:17:37,988 INFO L125 PetriNetUnfolderBase]: For 1090988/1091000 co-relation queries the response was YES. [2024-06-20 15:17:38,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50090 conditions, 5290 events. 3179/5290 cut-off events. For 1090988/1091000 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35002 event pairs, 806 based on Foata normal form. 20/5309 useless extension candidates. Maximal degree in co-relation 49900. Up to 4703 conditions per place. [2024-06-20 15:17:38,069 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 77 changer transitions 0/489 dead transitions. [2024-06-20 15:17:38,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 489 transitions, 7169 flow [2024-06-20 15:17:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:17:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:17:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-20 15:17:38,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-20 15:17:38,071 INFO L175 Difference]: Start difference. First operand has 421 places, 456 transitions, 6059 flow. Second operand 9 states and 209 transitions. [2024-06-20 15:17:38,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 489 transitions, 7169 flow [2024-06-20 15:17:43,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 489 transitions, 7045 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 15:17:43,565 INFO L231 Difference]: Finished difference. Result has 425 places, 457 transitions, 6124 flow [2024-06-20 15:17:43,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5945, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6124, PETRI_PLACES=425, PETRI_TRANSITIONS=457} [2024-06-20 15:17:43,566 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-20 15:17:43,566 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 457 transitions, 6124 flow [2024-06-20 15:17:43,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:43,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:43,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:43,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 15:17:43,567 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)] === [2024-06-20 15:17:43,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1596604604, now seen corresponding path program 17 times [2024-06-20 15:17:43,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:43,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952876183] [2024-06-20 15:17:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:43,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:43,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:43,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952876183] [2024-06-20 15:17:43,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952876183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:43,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:43,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:17:43,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755807094] [2024-06-20 15:17:43,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:43,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:17:43,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:43,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:17:43,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:17:43,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:43,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 457 transitions, 6124 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:43,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:43,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:43,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:44,860 INFO L124 PetriNetUnfolderBase]: 3207/5334 cut-off events. [2024-06-20 15:17:44,861 INFO L125 PetriNetUnfolderBase]: For 1107717/1107729 co-relation queries the response was YES. [2024-06-20 15:17:44,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50459 conditions, 5334 events. 3207/5334 cut-off events. For 1107717/1107729 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35393 event pairs, 810 based on Foata normal form. 20/5353 useless extension candidates. Maximal degree in co-relation 50267. Up to 4747 conditions per place. [2024-06-20 15:17:44,947 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 400 selfloop transitions, 81 changer transitions 0/488 dead transitions. [2024-06-20 15:17:44,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 488 transitions, 7218 flow [2024-06-20 15:17:44,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:17:44,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:17:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-20 15:17:44,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-20 15:17:44,948 INFO L175 Difference]: Start difference. First operand has 425 places, 457 transitions, 6124 flow. Second operand 10 states and 224 transitions. [2024-06-20 15:17:44,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 488 transitions, 7218 flow [2024-06-20 15:17:50,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 488 transitions, 7063 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:17:50,978 INFO L231 Difference]: Finished difference. Result has 428 places, 458 transitions, 6158 flow [2024-06-20 15:17:50,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5969, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6158, PETRI_PLACES=428, PETRI_TRANSITIONS=458} [2024-06-20 15:17:50,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-20 15:17:50,978 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 458 transitions, 6158 flow [2024-06-20 15:17:50,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:50,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:50,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:50,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 15:17:50,979 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)] === [2024-06-20 15:17:50,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash 300763440, now seen corresponding path program 18 times [2024-06-20 15:17:50,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:50,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652054048] [2024-06-20 15:17:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:50,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:51,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:51,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652054048] [2024-06-20 15:17:51,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652054048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:51,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:51,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:17:51,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205097946] [2024-06-20 15:17:51,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:51,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:17:51,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:51,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:17:51,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:17:51,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:51,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 458 transitions, 6158 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:51,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:51,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:51,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:17:52,382 INFO L124 PetriNetUnfolderBase]: 3227/5371 cut-off events. [2024-06-20 15:17:52,383 INFO L125 PetriNetUnfolderBase]: For 1113044/1113052 co-relation queries the response was YES. [2024-06-20 15:17:52,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50895 conditions, 5371 events. 3227/5371 cut-off events. For 1113044/1113052 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 35610 event pairs, 613 based on Foata normal form. 14/5383 useless extension candidates. Maximal degree in co-relation 50702. Up to 3979 conditions per place. [2024-06-20 15:17:52,471 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 393 selfloop transitions, 94 changer transitions 0/494 dead transitions. [2024-06-20 15:17:52,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 494 transitions, 7778 flow [2024-06-20 15:17:52,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:17:52,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:17:52,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:17:52,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 15:17:52,472 INFO L175 Difference]: Start difference. First operand has 428 places, 458 transitions, 6158 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:17:52,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 494 transitions, 7778 flow [2024-06-20 15:17:59,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 494 transitions, 7613 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:17:59,509 INFO L231 Difference]: Finished difference. Result has 427 places, 459 transitions, 6213 flow [2024-06-20 15:17:59,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5993, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6213, PETRI_PLACES=427, PETRI_TRANSITIONS=459} [2024-06-20 15:17:59,509 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-20 15:17:59,509 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 459 transitions, 6213 flow [2024-06-20 15:17:59,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:59,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:17:59,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:17:59,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 15:17:59,510 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)] === [2024-06-20 15:17:59,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:17:59,510 INFO L85 PathProgramCache]: Analyzing trace with hash 300883410, now seen corresponding path program 19 times [2024-06-20 15:17:59,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:17:59,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918066266] [2024-06-20 15:17:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:17:59,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:17:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:17:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:17:59,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:17:59,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918066266] [2024-06-20 15:17:59,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918066266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:17:59,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:17:59,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:17:59,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527903438] [2024-06-20 15:17:59,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:17:59,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:17:59,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:17:59,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:17:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:17:59,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:17:59,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 459 transitions, 6213 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:17:59,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:17:59,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:17:59,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:00,864 INFO L124 PetriNetUnfolderBase]: 3214/5353 cut-off events. [2024-06-20 15:18:00,864 INFO L125 PetriNetUnfolderBase]: For 1092468/1092480 co-relation queries the response was YES. [2024-06-20 15:18:00,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50460 conditions, 5353 events. 3214/5353 cut-off events. For 1092468/1092480 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 35488 event pairs, 596 based on Foata normal form. 18/5370 useless extension candidates. Maximal degree in co-relation 50266. Up to 4776 conditions per place. [2024-06-20 15:18:00,959 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 431 selfloop transitions, 46 changer transitions 0/484 dead transitions. [2024-06-20 15:18:00,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 484 transitions, 7245 flow [2024-06-20 15:18:00,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:18:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:18:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 15:18:00,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-20 15:18:00,960 INFO L175 Difference]: Start difference. First operand has 427 places, 459 transitions, 6213 flow. Second operand 7 states and 165 transitions. [2024-06-20 15:18:00,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 484 transitions, 7245 flow [2024-06-20 15:18:08,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 484 transitions, 6743 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-20 15:18:08,358 INFO L231 Difference]: Finished difference. Result has 424 places, 459 transitions, 5807 flow [2024-06-20 15:18:08,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5711, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5807, PETRI_PLACES=424, PETRI_TRANSITIONS=459} [2024-06-20 15:18:08,358 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 383 predicate places. [2024-06-20 15:18:08,358 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 459 transitions, 5807 flow [2024-06-20 15:18:08,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:08,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:08,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:08,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 15:18:08,359 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:08,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:08,359 INFO L85 PathProgramCache]: Analyzing trace with hash 300883596, now seen corresponding path program 13 times [2024-06-20 15:18:08,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:08,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066971104] [2024-06-20 15:18:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:08,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:08,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:08,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066971104] [2024-06-20 15:18:08,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066971104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:08,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:08,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:08,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6682940] [2024-06-20 15:18:08,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:08,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:08,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:08,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:08,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:08,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:08,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 459 transitions, 5807 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:08,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:08,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:08,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:09,695 INFO L124 PetriNetUnfolderBase]: 3201/5332 cut-off events. [2024-06-20 15:18:09,696 INFO L125 PetriNetUnfolderBase]: For 1062724/1062736 co-relation queries the response was YES. [2024-06-20 15:18:09,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48196 conditions, 5332 events. 3201/5332 cut-off events. For 1062724/1062736 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 35356 event pairs, 576 based on Foata normal form. 18/5349 useless extension candidates. Maximal degree in co-relation 48006. Up to 4410 conditions per place. [2024-06-20 15:18:09,784 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 407 selfloop transitions, 75 changer transitions 0/489 dead transitions. [2024-06-20 15:18:09,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 489 transitions, 7141 flow [2024-06-20 15:18:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:09,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:18:09,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 15:18:09,785 INFO L175 Difference]: Start difference. First operand has 424 places, 459 transitions, 5807 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:18:09,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 489 transitions, 7141 flow [2024-06-20 15:18:14,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 489 transitions, 7029 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:14,980 INFO L231 Difference]: Finished difference. Result has 426 places, 459 transitions, 5851 flow [2024-06-20 15:18:14,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5695, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5851, PETRI_PLACES=426, PETRI_TRANSITIONS=459} [2024-06-20 15:18:14,980 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-20 15:18:14,981 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 459 transitions, 5851 flow [2024-06-20 15:18:14,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:14,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:14,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:14,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 15:18:14,981 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:14,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:14,982 INFO L85 PathProgramCache]: Analyzing trace with hash 308292906, now seen corresponding path program 14 times [2024-06-20 15:18:14,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:14,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417189839] [2024-06-20 15:18:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:14,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:15,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:15,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417189839] [2024-06-20 15:18:15,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417189839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:15,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:15,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:15,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040326454] [2024-06-20 15:18:15,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:15,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:15,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:15,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:15,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:15,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:15,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 459 transitions, 5851 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:15,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:15,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:15,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:16,355 INFO L124 PetriNetUnfolderBase]: 3188/5311 cut-off events. [2024-06-20 15:18:16,355 INFO L125 PetriNetUnfolderBase]: For 1041438/1041450 co-relation queries the response was YES. [2024-06-20 15:18:16,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47627 conditions, 5311 events. 3188/5311 cut-off events. For 1041438/1041450 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 35271 event pairs, 757 based on Foata normal form. 18/5326 useless extension candidates. Maximal degree in co-relation 47436. Up to 4674 conditions per place. [2024-06-20 15:18:16,446 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 415 selfloop transitions, 63 changer transitions 0/485 dead transitions. [2024-06-20 15:18:16,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 485 transitions, 7169 flow [2024-06-20 15:18:16,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:18:16,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:18:16,447 INFO L175 Difference]: Start difference. First operand has 426 places, 459 transitions, 5851 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:18:16,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 485 transitions, 7169 flow [2024-06-20 15:18:20,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 485 transitions, 6928 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 15:18:20,754 INFO L231 Difference]: Finished difference. Result has 425 places, 459 transitions, 5742 flow [2024-06-20 15:18:20,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5610, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5742, PETRI_PLACES=425, PETRI_TRANSITIONS=459} [2024-06-20 15:18:20,755 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-20 15:18:20,755 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 459 transitions, 5742 flow [2024-06-20 15:18:20,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:20,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:20,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:20,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 15:18:20,756 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:20,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash 566580690, now seen corresponding path program 20 times [2024-06-20 15:18:20,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:20,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022450427] [2024-06-20 15:18:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:20,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:20,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:20,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022450427] [2024-06-20 15:18:20,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022450427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:20,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:20,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:20,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141731011] [2024-06-20 15:18:20,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:20,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:20,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:20,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:20,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:20,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:20,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 459 transitions, 5742 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:20,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:20,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:20,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:22,111 INFO L124 PetriNetUnfolderBase]: 3175/5294 cut-off events. [2024-06-20 15:18:22,111 INFO L125 PetriNetUnfolderBase]: For 1013312/1013324 co-relation queries the response was YES. [2024-06-20 15:18:22,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46540 conditions, 5294 events. 3175/5294 cut-off events. For 1013312/1013324 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 35179 event pairs, 778 based on Foata normal form. 18/5307 useless extension candidates. Maximal degree in co-relation 46349. Up to 4742 conditions per place. [2024-06-20 15:18:22,198 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 438 selfloop transitions, 40 changer transitions 0/485 dead transitions. [2024-06-20 15:18:22,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 485 transitions, 7054 flow [2024-06-20 15:18:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 15:18:22,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-20 15:18:22,200 INFO L175 Difference]: Start difference. First operand has 425 places, 459 transitions, 5742 flow. Second operand 8 states and 183 transitions. [2024-06-20 15:18:22,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 485 transitions, 7054 flow [2024-06-20 15:18:26,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 485 transitions, 6879 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:18:26,995 INFO L231 Difference]: Finished difference. Result has 425 places, 459 transitions, 5651 flow [2024-06-20 15:18:26,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5651, PETRI_PLACES=425, PETRI_TRANSITIONS=459} [2024-06-20 15:18:26,996 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-20 15:18:26,996 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 459 transitions, 5651 flow [2024-06-20 15:18:26,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:26,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:26,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:26,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 15:18:26,997 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:26,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:26,997 INFO L85 PathProgramCache]: Analyzing trace with hash 308302206, now seen corresponding path program 15 times [2024-06-20 15:18:26,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:26,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425351040] [2024-06-20 15:18:26,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:26,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:27,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:27,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425351040] [2024-06-20 15:18:27,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425351040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:27,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:27,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:27,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819910191] [2024-06-20 15:18:27,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:27,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:27,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:27,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:27,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:27,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:27,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 459 transitions, 5651 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:27,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:27,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:27,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:28,408 INFO L124 PetriNetUnfolderBase]: 3157/5268 cut-off events. [2024-06-20 15:18:28,409 INFO L125 PetriNetUnfolderBase]: For 983202/983214 co-relation queries the response was YES. [2024-06-20 15:18:28,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45397 conditions, 5268 events. 3157/5268 cut-off events. For 983202/983214 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 34994 event pairs, 768 based on Foata normal form. 20/5287 useless extension candidates. Maximal degree in co-relation 45205. Up to 4707 conditions per place. [2024-06-20 15:18:28,489 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 415 selfloop transitions, 59 changer transitions 0/481 dead transitions. [2024-06-20 15:18:28,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 481 transitions, 6695 flow [2024-06-20 15:18:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:28,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-20 15:18:28,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:18:28,490 INFO L175 Difference]: Start difference. First operand has 425 places, 459 transitions, 5651 flow. Second operand 8 states and 184 transitions. [2024-06-20 15:18:28,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 481 transitions, 6695 flow [2024-06-20 15:18:33,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 481 transitions, 6591 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:18:33,778 INFO L231 Difference]: Finished difference. Result has 427 places, 459 transitions, 5673 flow [2024-06-20 15:18:33,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5547, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5673, PETRI_PLACES=427, PETRI_TRANSITIONS=459} [2024-06-20 15:18:33,778 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-20 15:18:33,778 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 459 transitions, 5673 flow [2024-06-20 15:18:33,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:33,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:33,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:33,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 15:18:33,779 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:33,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:33,779 INFO L85 PathProgramCache]: Analyzing trace with hash 566728560, now seen corresponding path program 21 times [2024-06-20 15:18:33,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:33,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861233790] [2024-06-20 15:18:33,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:33,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:33,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:33,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861233790] [2024-06-20 15:18:33,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861233790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:33,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:33,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:33,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469324072] [2024-06-20 15:18:33,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:33,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:33,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:33,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:33,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:34,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:34,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 459 transitions, 5673 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:34,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:34,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:34,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:35,077 INFO L124 PetriNetUnfolderBase]: 3139/5242 cut-off events. [2024-06-20 15:18:35,077 INFO L125 PetriNetUnfolderBase]: For 939876/939888 co-relation queries the response was YES. [2024-06-20 15:18:35,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44346 conditions, 5242 events. 3139/5242 cut-off events. For 939876/939888 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 34829 event pairs, 772 based on Foata normal form. 20/5261 useless extension candidates. Maximal degree in co-relation 44153. Up to 4744 conditions per place. [2024-06-20 15:18:35,168 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 438 selfloop transitions, 35 changer transitions 0/480 dead transitions. [2024-06-20 15:18:35,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 480 transitions, 6709 flow [2024-06-20 15:18:35,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:18:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:18:35,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 15:18:35,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:18:35,169 INFO L175 Difference]: Start difference. First operand has 427 places, 459 transitions, 5673 flow. Second operand 7 states and 161 transitions. [2024-06-20 15:18:35,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 480 transitions, 6709 flow [2024-06-20 15:18:40,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 480 transitions, 6580 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 15:18:40,768 INFO L231 Difference]: Finished difference. Result has 427 places, 459 transitions, 5619 flow [2024-06-20 15:18:40,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5544, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5619, PETRI_PLACES=427, PETRI_TRANSITIONS=459} [2024-06-20 15:18:40,769 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-20 15:18:40,769 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 459 transitions, 5619 flow [2024-06-20 15:18:40,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:40,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:40,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:40,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 15:18:40,769 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:40,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:40,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1022689686, now seen corresponding path program 16 times [2024-06-20 15:18:40,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:40,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458387645] [2024-06-20 15:18:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:40,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:40,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:40,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458387645] [2024-06-20 15:18:40,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458387645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:40,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:40,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:40,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605209887] [2024-06-20 15:18:40,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:40,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:40,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:40,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:40,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:40,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:40,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 459 transitions, 5619 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:40,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:40,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:40,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:42,082 INFO L124 PetriNetUnfolderBase]: 3167/5294 cut-off events. [2024-06-20 15:18:42,083 INFO L125 PetriNetUnfolderBase]: For 955129/955141 co-relation queries the response was YES. [2024-06-20 15:18:42,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44779 conditions, 5294 events. 3167/5294 cut-off events. For 955129/955141 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 35256 event pairs, 756 based on Foata normal form. 20/5313 useless extension candidates. Maximal degree in co-relation 44585. Up to 4661 conditions per place. [2024-06-20 15:18:42,176 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 413 selfloop transitions, 61 changer transitions 0/481 dead transitions. [2024-06-20 15:18:42,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 481 transitions, 6690 flow [2024-06-20 15:18:42,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:18:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:18:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 15:18:42,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-20 15:18:42,177 INFO L175 Difference]: Start difference. First operand has 427 places, 459 transitions, 5619 flow. Second operand 7 states and 165 transitions. [2024-06-20 15:18:42,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 481 transitions, 6690 flow [2024-06-20 15:18:48,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 481 transitions, 6621 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 15:18:48,291 INFO L231 Difference]: Finished difference. Result has 429 places, 460 transitions, 5717 flow [2024-06-20 15:18:48,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5717, PETRI_PLACES=429, PETRI_TRANSITIONS=460} [2024-06-20 15:18:48,292 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-20 15:18:48,292 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 460 transitions, 5717 flow [2024-06-20 15:18:48,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:48,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:48,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:48,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 15:18:48,293 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:48,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:48,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1017506052, now seen corresponding path program 22 times [2024-06-20 15:18:48,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:48,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519126295] [2024-06-20 15:18:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:48,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:48,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:48,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519126295] [2024-06-20 15:18:48,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519126295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:48,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:48,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:48,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444238968] [2024-06-20 15:18:48,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:48,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:48,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:48,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:48,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:48,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:48,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 460 transitions, 5717 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:48,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:48,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:48,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:49,586 INFO L124 PetriNetUnfolderBase]: 3149/5260 cut-off events. [2024-06-20 15:18:49,586 INFO L125 PetriNetUnfolderBase]: For 910055/910067 co-relation queries the response was YES. [2024-06-20 15:18:49,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43908 conditions, 5260 events. 3149/5260 cut-off events. For 910055/910067 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 35020 event pairs, 756 based on Foata normal form. 20/5279 useless extension candidates. Maximal degree in co-relation 43713. Up to 4584 conditions per place. [2024-06-20 15:18:49,676 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 415 selfloop transitions, 68 changer transitions 0/490 dead transitions. [2024-06-20 15:18:49,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 490 transitions, 6797 flow [2024-06-20 15:18:49,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:18:49,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:18:49,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:18:49,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-20 15:18:49,677 INFO L175 Difference]: Start difference. First operand has 429 places, 460 transitions, 5717 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:18:49,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 490 transitions, 6797 flow [2024-06-20 15:18:54,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 490 transitions, 6657 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:18:54,394 INFO L231 Difference]: Finished difference. Result has 429 places, 460 transitions, 5725 flow [2024-06-20 15:18:54,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5577, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5725, PETRI_PLACES=429, PETRI_TRANSITIONS=460} [2024-06-20 15:18:54,395 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-20 15:18:54,395 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 460 transitions, 5725 flow [2024-06-20 15:18:54,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:54,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:54,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:54,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 15:18:54,396 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:54,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:54,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1011964926, now seen corresponding path program 17 times [2024-06-20 15:18:54,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:54,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808827024] [2024-06-20 15:18:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:54,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:54,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:54,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808827024] [2024-06-20 15:18:54,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808827024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:54,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:54,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:54,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731013854] [2024-06-20 15:18:54,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:54,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:54,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:54,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:54,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:18:54,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:18:54,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 460 transitions, 5725 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:54,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:18:54,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:18:54,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:18:55,639 INFO L124 PetriNetUnfolderBase]: 3164/5289 cut-off events. [2024-06-20 15:18:55,639 INFO L125 PetriNetUnfolderBase]: For 881490/881502 co-relation queries the response was YES. [2024-06-20 15:18:55,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43664 conditions, 5289 events. 3164/5289 cut-off events. For 881490/881502 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35265 event pairs, 761 based on Foata normal form. 20/5308 useless extension candidates. Maximal degree in co-relation 43470. Up to 4724 conditions per place. [2024-06-20 15:18:55,725 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 417 selfloop transitions, 59 changer transitions 0/483 dead transitions. [2024-06-20 15:18:55,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 483 transitions, 6804 flow [2024-06-20 15:18:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:18:55,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:18:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 15:18:55,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-20 15:18:55,726 INFO L175 Difference]: Start difference. First operand has 429 places, 460 transitions, 5725 flow. Second operand 8 states and 183 transitions. [2024-06-20 15:18:55,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 483 transitions, 6804 flow [2024-06-20 15:18:59,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 483 transitions, 6651 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:18:59,794 INFO L231 Difference]: Finished difference. Result has 430 places, 461 transitions, 5731 flow [2024-06-20 15:18:59,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5731, PETRI_PLACES=430, PETRI_TRANSITIONS=461} [2024-06-20 15:18:59,794 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 389 predicate places. [2024-06-20 15:18:59,794 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 461 transitions, 5731 flow [2024-06-20 15:18:59,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:18:59,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:18:59,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:18:59,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 15:18:59,795 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:18:59,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:18:59,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1022868432, now seen corresponding path program 23 times [2024-06-20 15:18:59,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:18:59,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623275960] [2024-06-20 15:18:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:18:59,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:18:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:18:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:18:59,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:18:59,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623275960] [2024-06-20 15:18:59,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623275960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:18:59,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:18:59,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:18:59,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259538837] [2024-06-20 15:18:59,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:18:59,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:18:59,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:18:59,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:18:59,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:00,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:00,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 461 transitions, 5731 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:00,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:00,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:00,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:01,171 INFO L124 PetriNetUnfolderBase]: 3146/5263 cut-off events. [2024-06-20 15:19:01,171 INFO L125 PetriNetUnfolderBase]: For 821840/821852 co-relation queries the response was YES. [2024-06-20 15:19:01,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42467 conditions, 5263 events. 3146/5263 cut-off events. For 821840/821852 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35099 event pairs, 753 based on Foata normal form. 20/5282 useless extension candidates. Maximal degree in co-relation 42273. Up to 4565 conditions per place. [2024-06-20 15:19:01,250 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 419 selfloop transitions, 69 changer transitions 0/495 dead transitions. [2024-06-20 15:19:01,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 495 transitions, 6831 flow [2024-06-20 15:19:01,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 15:19:01,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 15:19:01,252 INFO L175 Difference]: Start difference. First operand has 430 places, 461 transitions, 5731 flow. Second operand 8 states and 195 transitions. [2024-06-20 15:19:01,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 495 transitions, 6831 flow [2024-06-20 15:19:05,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 495 transitions, 6696 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:19:05,800 INFO L231 Difference]: Finished difference. Result has 431 places, 461 transitions, 5745 flow [2024-06-20 15:19:05,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5596, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5745, PETRI_PLACES=431, PETRI_TRANSITIONS=461} [2024-06-20 15:19:05,800 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-20 15:19:05,800 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 461 transitions, 5745 flow [2024-06-20 15:19:05,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:05,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:05,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:05,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 15:19:05,801 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:05,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:05,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1023016116, now seen corresponding path program 18 times [2024-06-20 15:19:05,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:05,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929485417] [2024-06-20 15:19:05,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:05,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:05,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:05,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929485417] [2024-06-20 15:19:05,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929485417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:05,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:05,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:05,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17743133] [2024-06-20 15:19:05,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:05,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:05,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:05,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:05,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:06,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:06,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 461 transitions, 5745 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:06,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:06,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:06,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:07,302 INFO L124 PetriNetUnfolderBase]: 3133/5244 cut-off events. [2024-06-20 15:19:07,303 INFO L125 PetriNetUnfolderBase]: For 761309/761321 co-relation queries the response was YES. [2024-06-20 15:19:07,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41548 conditions, 5244 events. 3133/5244 cut-off events. For 761309/761321 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 34972 event pairs, 515 based on Foata normal form. 18/5261 useless extension candidates. Maximal degree in co-relation 41354. Up to 4319 conditions per place. [2024-06-20 15:19:07,383 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 402 selfloop transitions, 79 changer transitions 0/488 dead transitions. [2024-06-20 15:19:07,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 488 transitions, 6837 flow [2024-06-20 15:19:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:19:07,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 15:19:07,385 INFO L175 Difference]: Start difference. First operand has 431 places, 461 transitions, 5745 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:19:07,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 488 transitions, 6837 flow [2024-06-20 15:19:11,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 488 transitions, 6676 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 15:19:11,222 INFO L231 Difference]: Finished difference. Result has 429 places, 461 transitions, 5756 flow [2024-06-20 15:19:11,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5584, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5756, PETRI_PLACES=429, PETRI_TRANSITIONS=461} [2024-06-20 15:19:11,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-20 15:19:11,223 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 461 transitions, 5756 flow [2024-06-20 15:19:11,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:11,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:11,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:11,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 15:19:11,223 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:11,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:11,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1023016302, now seen corresponding path program 24 times [2024-06-20 15:19:11,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:11,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638888146] [2024-06-20 15:19:11,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:11,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:11,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:11,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638888146] [2024-06-20 15:19:11,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638888146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:11,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:11,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:11,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269741621] [2024-06-20 15:19:11,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:11,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:11,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:11,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:11,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:11,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:11,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 461 transitions, 5756 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:11,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:11,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:11,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:12,431 INFO L124 PetriNetUnfolderBase]: 3120/5225 cut-off events. [2024-06-20 15:19:12,432 INFO L125 PetriNetUnfolderBase]: For 706864/706876 co-relation queries the response was YES. [2024-06-20 15:19:12,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40728 conditions, 5225 events. 3120/5225 cut-off events. For 706864/706876 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 34966 event pairs, 510 based on Foata normal form. 18/5242 useless extension candidates. Maximal degree in co-relation 40535. Up to 4200 conditions per place. [2024-06-20 15:19:12,515 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 405 selfloop transitions, 86 changer transitions 0/498 dead transitions. [2024-06-20 15:19:12,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 498 transitions, 6886 flow [2024-06-20 15:19:12,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:19:12,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 15:19:12,516 INFO L175 Difference]: Start difference. First operand has 429 places, 461 transitions, 5756 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:19:12,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 498 transitions, 6886 flow [2024-06-20 15:19:16,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 498 transitions, 6706 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-20 15:19:16,103 INFO L231 Difference]: Finished difference. Result has 429 places, 461 transitions, 5756 flow [2024-06-20 15:19:16,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5576, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5756, PETRI_PLACES=429, PETRI_TRANSITIONS=461} [2024-06-20 15:19:16,103 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-20 15:19:16,103 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 461 transitions, 5756 flow [2024-06-20 15:19:16,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:16,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:16,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:16,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 15:19:16,104 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:16,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:16,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1513914430, now seen corresponding path program 19 times [2024-06-20 15:19:16,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:16,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274259814] [2024-06-20 15:19:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:16,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:16,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:16,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274259814] [2024-06-20 15:19:16,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274259814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:16,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:16,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:16,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459831055] [2024-06-20 15:19:16,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:16,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:16,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:16,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:16,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:16,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:16,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 461 transitions, 5756 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:16,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:16,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:16,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:17,323 INFO L124 PetriNetUnfolderBase]: 3148/5266 cut-off events. [2024-06-20 15:19:17,323 INFO L125 PetriNetUnfolderBase]: For 700484/700492 co-relation queries the response was YES. [2024-06-20 15:19:17,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40846 conditions, 5266 events. 3148/5266 cut-off events. For 700484/700492 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 35179 event pairs, 777 based on Foata normal form. 13/5277 useless extension candidates. Maximal degree in co-relation 40655. Up to 4700 conditions per place. [2024-06-20 15:19:17,406 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 392 selfloop transitions, 78 changer transitions 0/477 dead transitions. [2024-06-20 15:19:17,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 477 transitions, 6805 flow [2024-06-20 15:19:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-20 15:19:17,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-20 15:19:17,407 INFO L175 Difference]: Start difference. First operand has 429 places, 461 transitions, 5756 flow. Second operand 7 states and 157 transitions. [2024-06-20 15:19:17,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 477 transitions, 6805 flow [2024-06-20 15:19:20,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 477 transitions, 6621 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 15:19:20,641 INFO L231 Difference]: Finished difference. Result has 427 places, 462 transitions, 5766 flow [2024-06-20 15:19:20,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5766, PETRI_PLACES=427, PETRI_TRANSITIONS=462} [2024-06-20 15:19:20,641 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-20 15:19:20,641 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 462 transitions, 5766 flow [2024-06-20 15:19:20,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:20,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:20,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:20,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 15:19:20,642 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:20,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:20,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1061636138, now seen corresponding path program 20 times [2024-06-20 15:19:20,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:20,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724694655] [2024-06-20 15:19:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:20,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:20,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:20,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724694655] [2024-06-20 15:19:20,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724694655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:20,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:20,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:20,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973510733] [2024-06-20 15:19:20,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:20,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:20,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:20,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:20,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:20,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:20,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 462 transitions, 5766 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:20,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:20,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:20,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:21,893 INFO L124 PetriNetUnfolderBase]: 3209/5368 cut-off events. [2024-06-20 15:19:21,893 INFO L125 PetriNetUnfolderBase]: For 732359/732371 co-relation queries the response was YES. [2024-06-20 15:19:22,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42121 conditions, 5368 events. 3209/5368 cut-off events. For 732359/732371 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 35842 event pairs, 752 based on Foata normal form. 20/5387 useless extension candidates. Maximal degree in co-relation 41931. Up to 4461 conditions per place. [2024-06-20 15:19:22,113 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 395 selfloop transitions, 90 changer transitions 0/492 dead transitions. [2024-06-20 15:19:22,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 492 transitions, 7186 flow [2024-06-20 15:19:22,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:19:22,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:19:22,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-20 15:19:22,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 15:19:22,115 INFO L175 Difference]: Start difference. First operand has 427 places, 462 transitions, 5766 flow. Second operand 9 states and 204 transitions. [2024-06-20 15:19:22,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 492 transitions, 7186 flow [2024-06-20 15:19:25,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 492 transitions, 7019 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:25,514 INFO L231 Difference]: Finished difference. Result has 432 places, 464 transitions, 5877 flow [2024-06-20 15:19:25,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5599, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5877, PETRI_PLACES=432, PETRI_TRANSITIONS=464} [2024-06-20 15:19:25,514 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-20 15:19:25,515 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 464 transitions, 5877 flow [2024-06-20 15:19:25,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:25,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:25,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:25,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 15:19:25,515 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:25,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:25,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1516771390, now seen corresponding path program 21 times [2024-06-20 15:19:25,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:25,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755350869] [2024-06-20 15:19:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:25,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:25,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:25,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755350869] [2024-06-20 15:19:25,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755350869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:25,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:25,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:25,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151392046] [2024-06-20 15:19:25,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:25,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:25,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:25,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:25,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:25,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:25,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 464 transitions, 5877 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:25,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:25,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:25,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:26,740 INFO L124 PetriNetUnfolderBase]: 3224/5394 cut-off events. [2024-06-20 15:19:26,740 INFO L125 PetriNetUnfolderBase]: For 732723/732731 co-relation queries the response was YES. [2024-06-20 15:19:26,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42457 conditions, 5394 events. 3224/5394 cut-off events. For 732723/732731 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 36217 event pairs, 795 based on Foata normal form. 13/5405 useless extension candidates. Maximal degree in co-relation 42265. Up to 4712 conditions per place. [2024-06-20 15:19:26,826 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 397 selfloop transitions, 80 changer transitions 0/484 dead transitions. [2024-06-20 15:19:26,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 484 transitions, 6992 flow [2024-06-20 15:19:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 15:19:26,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 15:19:26,827 INFO L175 Difference]: Start difference. First operand has 432 places, 464 transitions, 5877 flow. Second operand 7 states and 160 transitions. [2024-06-20 15:19:26,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 484 transitions, 6992 flow [2024-06-20 15:19:30,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 484 transitions, 6826 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 15:19:30,842 INFO L231 Difference]: Finished difference. Result has 432 places, 465 transitions, 5908 flow [2024-06-20 15:19:30,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5711, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5908, PETRI_PLACES=432, PETRI_TRANSITIONS=465} [2024-06-20 15:19:30,842 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 391 predicate places. [2024-06-20 15:19:30,843 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 465 transitions, 5908 flow [2024-06-20 15:19:30,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:30,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:30,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:30,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 15:19:30,843 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:30,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:30,844 INFO L85 PathProgramCache]: Analyzing trace with hash 836591948, now seen corresponding path program 22 times [2024-06-20 15:19:30,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:30,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463393884] [2024-06-20 15:19:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:30,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:30,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:30,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463393884] [2024-06-20 15:19:30,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463393884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:30,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:31,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:31,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914003507] [2024-06-20 15:19:31,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:31,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:31,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:31,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:31,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:31,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:31,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 465 transitions, 5908 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:31,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:31,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:31,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:32,127 INFO L124 PetriNetUnfolderBase]: 3252/5441 cut-off events. [2024-06-20 15:19:32,127 INFO L125 PetriNetUnfolderBase]: For 733298/733310 co-relation queries the response was YES. [2024-06-20 15:19:32,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42737 conditions, 5441 events. 3252/5441 cut-off events. For 733298/733310 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36574 event pairs, 793 based on Foata normal form. 20/5460 useless extension candidates. Maximal degree in co-relation 42545. Up to 4800 conditions per place. [2024-06-20 15:19:32,217 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 397 selfloop transitions, 89 changer transitions 0/493 dead transitions. [2024-06-20 15:19:32,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 493 transitions, 7021 flow [2024-06-20 15:19:32,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:19:32,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:19:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-20 15:19:32,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2024-06-20 15:19:32,219 INFO L175 Difference]: Start difference. First operand has 432 places, 465 transitions, 5908 flow. Second operand 10 states and 221 transitions. [2024-06-20 15:19:32,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 493 transitions, 7021 flow [2024-06-20 15:19:36,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 493 transitions, 6849 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:36,183 INFO L231 Difference]: Finished difference. Result has 437 places, 466 transitions, 5960 flow [2024-06-20 15:19:36,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5736, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5960, PETRI_PLACES=437, PETRI_TRANSITIONS=466} [2024-06-20 15:19:36,184 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 396 predicate places. [2024-06-20 15:19:36,184 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 466 transitions, 5960 flow [2024-06-20 15:19:36,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:36,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:36,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:36,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 15:19:36,185 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:36,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:36,185 INFO L85 PathProgramCache]: Analyzing trace with hash 836413202, now seen corresponding path program 25 times [2024-06-20 15:19:36,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:36,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200988766] [2024-06-20 15:19:36,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:36,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:36,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:36,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200988766] [2024-06-20 15:19:36,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200988766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:36,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:36,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:36,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51309177] [2024-06-20 15:19:36,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:36,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:36,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:36,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:36,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:36,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:36,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 466 transitions, 5960 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:36,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:36,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:36,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:37,496 INFO L124 PetriNetUnfolderBase]: 3234/5415 cut-off events. [2024-06-20 15:19:37,496 INFO L125 PetriNetUnfolderBase]: For 687566/687578 co-relation queries the response was YES. [2024-06-20 15:19:37,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41686 conditions, 5415 events. 3234/5415 cut-off events. For 687566/687578 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36539 event pairs, 771 based on Foata normal form. 20/5434 useless extension candidates. Maximal degree in co-relation 41493. Up to 4641 conditions per place. [2024-06-20 15:19:37,579 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 404 selfloop transitions, 93 changer transitions 0/504 dead transitions. [2024-06-20 15:19:37,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 504 transitions, 7088 flow [2024-06-20 15:19:37,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:19:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:19:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-20 15:19:37,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-20 15:19:37,580 INFO L175 Difference]: Start difference. First operand has 437 places, 466 transitions, 5960 flow. Second operand 9 states and 217 transitions. [2024-06-20 15:19:37,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 504 transitions, 7088 flow [2024-06-20 15:19:41,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 504 transitions, 6895 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-20 15:19:41,753 INFO L231 Difference]: Finished difference. Result has 436 places, 466 transitions, 5967 flow [2024-06-20 15:19:41,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5767, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5967, PETRI_PLACES=436, PETRI_TRANSITIONS=466} [2024-06-20 15:19:41,754 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 395 predicate places. [2024-06-20 15:19:41,754 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 466 transitions, 5967 flow [2024-06-20 15:19:41,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:41,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:41,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:41,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 15:19:41,754 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:41,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:41,755 INFO L85 PathProgramCache]: Analyzing trace with hash 749573708, now seen corresponding path program 23 times [2024-06-20 15:19:41,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:41,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431880273] [2024-06-20 15:19:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:41,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:41,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:41,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431880273] [2024-06-20 15:19:41,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431880273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:41,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:41,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:41,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155216996] [2024-06-20 15:19:41,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:41,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:41,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:41,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:41,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:41,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:41,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 466 transitions, 5967 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:41,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:41,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:41,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:42,995 INFO L124 PetriNetUnfolderBase]: 3221/5383 cut-off events. [2024-06-20 15:19:42,996 INFO L125 PetriNetUnfolderBase]: For 619062/619074 co-relation queries the response was YES. [2024-06-20 15:19:43,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40715 conditions, 5383 events. 3221/5383 cut-off events. For 619062/619074 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 36132 event pairs, 741 based on Foata normal form. 18/5387 useless extension candidates. Maximal degree in co-relation 40523. Up to 4501 conditions per place. [2024-06-20 15:19:43,088 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 388 selfloop transitions, 105 changer transitions 0/500 dead transitions. [2024-06-20 15:19:43,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 500 transitions, 7337 flow [2024-06-20 15:19:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:19:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:19:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-20 15:19:43,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-06-20 15:19:43,089 INFO L175 Difference]: Start difference. First operand has 436 places, 466 transitions, 5967 flow. Second operand 10 states and 228 transitions. [2024-06-20 15:19:43,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 500 transitions, 7337 flow [2024-06-20 15:19:46,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 500 transitions, 7125 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-20 15:19:46,131 INFO L231 Difference]: Finished difference. Result has 435 places, 466 transitions, 5981 flow [2024-06-20 15:19:46,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5761, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5981, PETRI_PLACES=435, PETRI_TRANSITIONS=466} [2024-06-20 15:19:46,137 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 394 predicate places. [2024-06-20 15:19:46,137 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 466 transitions, 5981 flow [2024-06-20 15:19:46,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:46,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:46,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:46,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 15:19:46,137 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:46,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:46,138 INFO L85 PathProgramCache]: Analyzing trace with hash 836265332, now seen corresponding path program 26 times [2024-06-20 15:19:46,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:46,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292358227] [2024-06-20 15:19:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:46,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:46,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:46,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292358227] [2024-06-20 15:19:46,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292358227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:46,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:46,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:46,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777156925] [2024-06-20 15:19:46,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:46,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:46,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:46,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:46,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:46,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:46,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 466 transitions, 5981 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:46,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:46,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:46,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:47,425 INFO L124 PetriNetUnfolderBase]: 3208/5371 cut-off events. [2024-06-20 15:19:47,425 INFO L125 PetriNetUnfolderBase]: For 561990/562002 co-relation queries the response was YES. [2024-06-20 15:19:47,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39825 conditions, 5371 events. 3208/5371 cut-off events. For 561990/562002 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 36214 event pairs, 706 based on Foata normal form. 18/5382 useless extension candidates. Maximal degree in co-relation 39635. Up to 4426 conditions per place. [2024-06-20 15:19:47,512 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 399 selfloop transitions, 105 changer transitions 0/511 dead transitions. [2024-06-20 15:19:47,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 511 transitions, 7157 flow [2024-06-20 15:19:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:19:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:19:47,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-20 15:19:47,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6025 [2024-06-20 15:19:47,513 INFO L175 Difference]: Start difference. First operand has 435 places, 466 transitions, 5981 flow. Second operand 10 states and 241 transitions. [2024-06-20 15:19:47,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 511 transitions, 7157 flow [2024-06-20 15:19:50,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 511 transitions, 6925 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-20 15:19:50,708 INFO L231 Difference]: Finished difference. Result has 434 places, 466 transitions, 5969 flow [2024-06-20 15:19:50,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5749, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5969, PETRI_PLACES=434, PETRI_TRANSITIONS=466} [2024-06-20 15:19:50,709 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-20 15:19:50,709 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 466 transitions, 5969 flow [2024-06-20 15:19:50,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:50,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:50,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:50,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 15:19:50,710 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:50,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:50,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1064493098, now seen corresponding path program 24 times [2024-06-20 15:19:50,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:50,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888841417] [2024-06-20 15:19:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:50,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:50,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:50,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888841417] [2024-06-20 15:19:50,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888841417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:50,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:50,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:50,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742821156] [2024-06-20 15:19:50,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:50,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:50,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:50,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:50,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:50,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:50,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 466 transitions, 5969 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:50,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:50,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:50,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:51,870 INFO L124 PetriNetUnfolderBase]: 3190/5351 cut-off events. [2024-06-20 15:19:51,870 INFO L125 PetriNetUnfolderBase]: For 503033/503045 co-relation queries the response was YES. [2024-06-20 15:19:51,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38336 conditions, 5351 events. 3190/5351 cut-off events. For 503033/503045 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36071 event pairs, 763 based on Foata normal form. 20/5370 useless extension candidates. Maximal degree in co-relation 38149. Up to 4742 conditions per place. [2024-06-20 15:19:51,953 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 398 selfloop transitions, 84 changer transitions 0/489 dead transitions. [2024-06-20 15:19:51,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 489 transitions, 7031 flow [2024-06-20 15:19:51,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:19:51,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:19:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-20 15:19:51,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 15:19:51,954 INFO L175 Difference]: Start difference. First operand has 434 places, 466 transitions, 5969 flow. Second operand 9 states and 200 transitions. [2024-06-20 15:19:51,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 489 transitions, 7031 flow [2024-06-20 15:19:54,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 489 transitions, 6791 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-20 15:19:54,930 INFO L231 Difference]: Finished difference. Result has 431 places, 466 transitions, 5905 flow [2024-06-20 15:19:54,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5729, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5905, PETRI_PLACES=431, PETRI_TRANSITIONS=466} [2024-06-20 15:19:54,931 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-20 15:19:54,931 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 466 transitions, 5905 flow [2024-06-20 15:19:54,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:54,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:54,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:54,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 15:19:54,932 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:54,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:54,932 INFO L85 PathProgramCache]: Analyzing trace with hash 747699758, now seen corresponding path program 25 times [2024-06-20 15:19:54,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:54,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120898305] [2024-06-20 15:19:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:54,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:55,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:55,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120898305] [2024-06-20 15:19:55,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120898305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:55,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:55,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:55,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010220446] [2024-06-20 15:19:55,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:55,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:55,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:55,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:55,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:55,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:55,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 466 transitions, 5905 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:55,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:55,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:55,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:56,139 INFO L124 PetriNetUnfolderBase]: 3210/5383 cut-off events. [2024-06-20 15:19:56,139 INFO L125 PetriNetUnfolderBase]: For 474384/474396 co-relation queries the response was YES. [2024-06-20 15:19:56,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38204 conditions, 5383 events. 3210/5383 cut-off events. For 474384/474396 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 36148 event pairs, 484 based on Foata normal form. 18/5400 useless extension candidates. Maximal degree in co-relation 38019. Up to 3690 conditions per place. [2024-06-20 15:19:56,224 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 363 selfloop transitions, 134 changer transitions 0/504 dead transitions. [2024-06-20 15:19:56,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 504 transitions, 7354 flow [2024-06-20 15:19:56,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:19:56,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:19:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-20 15:19:56,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-20 15:19:56,225 INFO L175 Difference]: Start difference. First operand has 431 places, 466 transitions, 5905 flow. Second operand 9 states and 214 transitions. [2024-06-20 15:19:56,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 504 transitions, 7354 flow [2024-06-20 15:19:58,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 504 transitions, 7119 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 15:19:59,005 INFO L231 Difference]: Finished difference. Result has 429 places, 467 transitions, 5983 flow [2024-06-20 15:19:59,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5672, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5983, PETRI_PLACES=429, PETRI_TRANSITIONS=467} [2024-06-20 15:19:59,005 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-20 15:19:59,005 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 467 transitions, 5983 flow [2024-06-20 15:19:59,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:59,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:59,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:59,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 15:19:59,006 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:59,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:59,006 INFO L85 PathProgramCache]: Analyzing trace with hash 747699572, now seen corresponding path program 27 times [2024-06-20 15:19:59,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:59,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281046312] [2024-06-20 15:19:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:59,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:59,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:59,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281046312] [2024-06-20 15:19:59,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281046312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:59,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:59,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:19:59,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897800803] [2024-06-20 15:19:59,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:59,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:19:59,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:59,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:19:59,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:19:59,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:19:59,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 467 transitions, 5983 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:59,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:59,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:19:59,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:00,318 INFO L124 PetriNetUnfolderBase]: 3197/5364 cut-off events. [2024-06-20 15:20:00,318 INFO L125 PetriNetUnfolderBase]: For 438093/438105 co-relation queries the response was YES. [2024-06-20 15:20:00,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37854 conditions, 5364 events. 3197/5364 cut-off events. For 438093/438105 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 36115 event pairs, 460 based on Foata normal form. 18/5381 useless extension candidates. Maximal degree in co-relation 37670. Up to 3774 conditions per place. [2024-06-20 15:20:00,407 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 378 selfloop transitions, 124 changer transitions 0/509 dead transitions. [2024-06-20 15:20:00,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 509 transitions, 7147 flow [2024-06-20 15:20:00,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-20 15:20:00,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-20 15:20:00,408 INFO L175 Difference]: Start difference. First operand has 429 places, 467 transitions, 5983 flow. Second operand 9 states and 220 transitions. [2024-06-20 15:20:00,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 509 transitions, 7147 flow [2024-06-20 15:20:02,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 509 transitions, 6878 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-20 15:20:02,936 INFO L231 Difference]: Finished difference. Result has 429 places, 467 transitions, 5970 flow [2024-06-20 15:20:02,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5714, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5970, PETRI_PLACES=429, PETRI_TRANSITIONS=467} [2024-06-20 15:20:02,936 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 388 predicate places. [2024-06-20 15:20:02,936 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 467 transitions, 5970 flow [2024-06-20 15:20:02,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:02,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:02,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:02,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 15:20:02,937 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:02,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:02,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2128502784, now seen corresponding path program 26 times [2024-06-20 15:20:02,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:02,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135134197] [2024-06-20 15:20:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:02,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:03,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:03,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135134197] [2024-06-20 15:20:03,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135134197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:03,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:03,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:03,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632504664] [2024-06-20 15:20:03,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:03,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:03,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:03,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:03,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:03,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:03,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 467 transitions, 5970 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:03,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:03,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:03,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:04,162 INFO L124 PetriNetUnfolderBase]: 3184/5345 cut-off events. [2024-06-20 15:20:04,162 INFO L125 PetriNetUnfolderBase]: For 385350/385362 co-relation queries the response was YES. [2024-06-20 15:20:04,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36759 conditions, 5345 events. 3184/5345 cut-off events. For 385350/385362 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 35937 event pairs, 481 based on Foata normal form. 18/5362 useless extension candidates. Maximal degree in co-relation 36577. Up to 3665 conditions per place. [2024-06-20 15:20:04,243 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 355 selfloop transitions, 137 changer transitions 0/499 dead transitions. [2024-06-20 15:20:04,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 499 transitions, 7116 flow [2024-06-20 15:20:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:04,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:04,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 15:20:04,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-20 15:20:04,244 INFO L175 Difference]: Start difference. First operand has 429 places, 467 transitions, 5970 flow. Second operand 9 states and 208 transitions. [2024-06-20 15:20:04,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 499 transitions, 7116 flow [2024-06-20 15:20:06,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 499 transitions, 6810 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 15:20:06,628 INFO L231 Difference]: Finished difference. Result has 428 places, 467 transitions, 5946 flow [2024-06-20 15:20:06,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5946, PETRI_PLACES=428, PETRI_TRANSITIONS=467} [2024-06-20 15:20:06,629 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-20 15:20:06,629 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 467 transitions, 5946 flow [2024-06-20 15:20:06,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:06,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:06,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:06,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 15:20:06,630 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:06,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:06,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1507955516, now seen corresponding path program 1 times [2024-06-20 15:20:06,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:06,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558773694] [2024-06-20 15:20:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:06,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:06,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:06,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558773694] [2024-06-20 15:20:06,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558773694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:06,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:06,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:06,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456477812] [2024-06-20 15:20:06,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:06,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:06,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:06,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:06,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:06,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:06,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 467 transitions, 5946 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:06,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:06,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:06,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:07,888 INFO L124 PetriNetUnfolderBase]: 3204/5381 cut-off events. [2024-06-20 15:20:07,888 INFO L125 PetriNetUnfolderBase]: For 380556/380568 co-relation queries the response was YES. [2024-06-20 15:20:07,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36962 conditions, 5381 events. 3204/5381 cut-off events. For 380556/380568 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 36360 event pairs, 704 based on Foata normal form. 18/5398 useless extension candidates. Maximal degree in co-relation 36780. Up to 4077 conditions per place. [2024-06-20 15:20:07,970 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 408 selfloop transitions, 95 changer transitions 0/510 dead transitions. [2024-06-20 15:20:07,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 510 transitions, 7376 flow [2024-06-20 15:20:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-20 15:20:07,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-20 15:20:07,972 INFO L175 Difference]: Start difference. First operand has 428 places, 467 transitions, 5946 flow. Second operand 9 states and 218 transitions. [2024-06-20 15:20:07,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 510 transitions, 7376 flow [2024-06-20 15:20:10,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 510 transitions, 7063 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 15:20:10,450 INFO L231 Difference]: Finished difference. Result has 427 places, 468 transitions, 5851 flow [2024-06-20 15:20:10,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5637, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5851, PETRI_PLACES=427, PETRI_TRANSITIONS=468} [2024-06-20 15:20:10,450 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-20 15:20:10,450 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 468 transitions, 5851 flow [2024-06-20 15:20:10,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:10,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:10,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:10,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 15:20:10,451 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:10,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:10,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1508254418, now seen corresponding path program 1 times [2024-06-20 15:20:10,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:10,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889024645] [2024-06-20 15:20:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:10,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:10,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:10,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889024645] [2024-06-20 15:20:10,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889024645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:10,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:10,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:10,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532074375] [2024-06-20 15:20:10,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:10,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:10,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:10,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:10,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:10,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:10,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 468 transitions, 5851 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:10,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:10,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:10,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:11,675 INFO L124 PetriNetUnfolderBase]: 3311/5558 cut-off events. [2024-06-20 15:20:11,676 INFO L125 PetriNetUnfolderBase]: For 421210/421222 co-relation queries the response was YES. [2024-06-20 15:20:11,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38423 conditions, 5558 events. 3311/5558 cut-off events. For 421210/421222 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 37693 event pairs, 742 based on Foata normal form. 18/5575 useless extension candidates. Maximal degree in co-relation 38242. Up to 4675 conditions per place. [2024-06-20 15:20:11,757 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 418 selfloop transitions, 81 changer transitions 0/506 dead transitions. [2024-06-20 15:20:11,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 506 transitions, 7312 flow [2024-06-20 15:20:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:11,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-20 15:20:11,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-20 15:20:11,758 INFO L175 Difference]: Start difference. First operand has 427 places, 468 transitions, 5851 flow. Second operand 9 states and 206 transitions. [2024-06-20 15:20:11,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 506 transitions, 7312 flow [2024-06-20 15:20:14,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 506 transitions, 7023 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:14,045 INFO L231 Difference]: Finished difference. Result has 431 places, 476 transitions, 5890 flow [2024-06-20 15:20:14,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5890, PETRI_PLACES=431, PETRI_TRANSITIONS=476} [2024-06-20 15:20:14,046 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-20 15:20:14,046 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 476 transitions, 5890 flow [2024-06-20 15:20:14,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:14,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:14,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:14,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 15:20:14,047 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:14,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:14,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1508254046, now seen corresponding path program 2 times [2024-06-20 15:20:14,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:14,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019175796] [2024-06-20 15:20:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:14,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:14,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:14,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019175796] [2024-06-20 15:20:14,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019175796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:14,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:14,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:14,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878757795] [2024-06-20 15:20:14,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:14,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:14,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:14,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:14,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:14,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:14,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 476 transitions, 5890 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:14,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:14,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:14,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:15,386 INFO L124 PetriNetUnfolderBase]: 3331/5592 cut-off events. [2024-06-20 15:20:15,386 INFO L125 PetriNetUnfolderBase]: For 428126/428138 co-relation queries the response was YES. [2024-06-20 15:20:15,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38159 conditions, 5592 events. 3331/5592 cut-off events. For 428126/428138 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 38019 event pairs, 717 based on Foata normal form. 18/5609 useless extension candidates. Maximal degree in co-relation 37976. Up to 4203 conditions per place. [2024-06-20 15:20:15,472 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 410 selfloop transitions, 100 changer transitions 0/517 dead transitions. [2024-06-20 15:20:15,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 517 transitions, 7339 flow [2024-06-20 15:20:15,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:15,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:15,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-20 15:20:15,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-20 15:20:15,473 INFO L175 Difference]: Start difference. First operand has 431 places, 476 transitions, 5890 flow. Second operand 9 states and 217 transitions. [2024-06-20 15:20:15,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 517 transitions, 7339 flow [2024-06-20 15:20:17,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 517 transitions, 7183 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:17,957 INFO L231 Difference]: Finished difference. Result has 434 places, 477 transitions, 5954 flow [2024-06-20 15:20:17,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5736, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5954, PETRI_PLACES=434, PETRI_TRANSITIONS=477} [2024-06-20 15:20:17,958 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-20 15:20:17,958 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 477 transitions, 5954 flow [2024-06-20 15:20:17,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:17,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:17,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:17,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 15:20:17,960 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:17,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:17,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1596968048, now seen corresponding path program 2 times [2024-06-20 15:20:17,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:17,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055649845] [2024-06-20 15:20:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:17,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:18,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:18,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055649845] [2024-06-20 15:20:18,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055649845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:18,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:18,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:18,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17965814] [2024-06-20 15:20:18,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:18,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:18,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:18,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:18,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:18,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:18,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 477 transitions, 5954 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:18,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:18,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:18,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:19,259 INFO L124 PetriNetUnfolderBase]: 3359/5638 cut-off events. [2024-06-20 15:20:19,260 INFO L125 PetriNetUnfolderBase]: For 441487/441499 co-relation queries the response was YES. [2024-06-20 15:20:19,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38666 conditions, 5638 events. 3359/5638 cut-off events. For 441487/441499 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 38393 event pairs, 812 based on Foata normal form. 20/5657 useless extension candidates. Maximal degree in co-relation 38483. Up to 5032 conditions per place. [2024-06-20 15:20:19,344 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 424 selfloop transitions, 67 changer transitions 0/498 dead transitions. [2024-06-20 15:20:19,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 498 transitions, 7049 flow [2024-06-20 15:20:19,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:19,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:19,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-20 15:20:19,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-20 15:20:19,345 INFO L175 Difference]: Start difference. First operand has 434 places, 477 transitions, 5954 flow. Second operand 9 states and 199 transitions. [2024-06-20 15:20:19,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 498 transitions, 7049 flow [2024-06-20 15:20:21,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 498 transitions, 6893 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:21,892 INFO L231 Difference]: Finished difference. Result has 437 places, 478 transitions, 5969 flow [2024-06-20 15:20:21,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5798, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5969, PETRI_PLACES=437, PETRI_TRANSITIONS=478} [2024-06-20 15:20:21,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 396 predicate places. [2024-06-20 15:20:21,893 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 478 transitions, 5969 flow [2024-06-20 15:20:21,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:21,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:21,893 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, 1] [2024-06-20 15:20:21,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 15:20:21,893 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:21,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:21,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1510128368, now seen corresponding path program 3 times [2024-06-20 15:20:21,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:21,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015792878] [2024-06-20 15:20:21,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:21,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:22,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:22,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015792878] [2024-06-20 15:20:22,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015792878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:22,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:22,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:22,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92935707] [2024-06-20 15:20:22,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:22,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:22,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:22,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:22,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:22,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:22,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 478 transitions, 5969 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:22,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:22,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:22,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:23,182 INFO L124 PetriNetUnfolderBase]: 3379/5668 cut-off events. [2024-06-20 15:20:23,183 INFO L125 PetriNetUnfolderBase]: For 438828/438840 co-relation queries the response was YES. [2024-06-20 15:20:23,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38831 conditions, 5668 events. 3379/5668 cut-off events. For 438828/438840 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 38660 event pairs, 800 based on Foata normal form. 18/5685 useless extension candidates. Maximal degree in co-relation 38647. Up to 5004 conditions per place. [2024-06-20 15:20:23,277 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 424 selfloop transitions, 73 changer transitions 0/504 dead transitions. [2024-06-20 15:20:23,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 504 transitions, 7116 flow [2024-06-20 15:20:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:20:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:20:23,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-20 15:20:23,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:20:23,279 INFO L175 Difference]: Start difference. First operand has 437 places, 478 transitions, 5969 flow. Second operand 10 states and 220 transitions. [2024-06-20 15:20:23,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 504 transitions, 7116 flow [2024-06-20 15:20:25,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 504 transitions, 6976 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:25,749 INFO L231 Difference]: Finished difference. Result has 441 places, 480 transitions, 6034 flow [2024-06-20 15:20:25,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5829, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6034, PETRI_PLACES=441, PETRI_TRANSITIONS=480} [2024-06-20 15:20:25,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-20 15:20:25,750 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 480 transitions, 6034 flow [2024-06-20 15:20:25,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:25,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:25,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:25,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 15:20:25,750 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:25,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:25,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1596819806, now seen corresponding path program 3 times [2024-06-20 15:20:25,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:25,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947288139] [2024-06-20 15:20:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:25,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:25,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:25,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947288139] [2024-06-20 15:20:25,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947288139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:25,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:25,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:25,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102442600] [2024-06-20 15:20:25,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:25,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:25,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:25,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:25,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:25,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:25,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 480 transitions, 6034 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:25,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:25,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:25,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:27,144 INFO L124 PetriNetUnfolderBase]: 3399/5702 cut-off events. [2024-06-20 15:20:27,144 INFO L125 PetriNetUnfolderBase]: For 445513/445525 co-relation queries the response was YES. [2024-06-20 15:20:27,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39111 conditions, 5702 events. 3399/5702 cut-off events. For 445513/445525 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 38918 event pairs, 812 based on Foata normal form. 18/5715 useless extension candidates. Maximal degree in co-relation 38925. Up to 4967 conditions per place. [2024-06-20 15:20:27,226 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 418 selfloop transitions, 89 changer transitions 0/514 dead transitions. [2024-06-20 15:20:27,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 514 transitions, 7202 flow [2024-06-20 15:20:27,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:20:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:20:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-20 15:20:27,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-20 15:20:27,228 INFO L175 Difference]: Start difference. First operand has 441 places, 480 transitions, 6034 flow. Second operand 10 states and 227 transitions. [2024-06-20 15:20:27,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 514 transitions, 7202 flow [2024-06-20 15:20:29,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 514 transitions, 7048 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 15:20:29,530 INFO L231 Difference]: Finished difference. Result has 443 places, 481 transitions, 6079 flow [2024-06-20 15:20:29,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5880, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6079, PETRI_PLACES=443, PETRI_TRANSITIONS=481} [2024-06-20 15:20:29,530 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-20 15:20:29,530 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 481 transitions, 6079 flow [2024-06-20 15:20:29,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:29,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:29,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:29,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 15:20:29,531 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:29,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:29,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1011780228, now seen corresponding path program 4 times [2024-06-20 15:20:29,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:29,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465621605] [2024-06-20 15:20:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:29,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:29,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:29,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465621605] [2024-06-20 15:20:29,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465621605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:29,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:29,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:29,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547214820] [2024-06-20 15:20:29,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:29,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:29,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:29,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:29,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:29,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:29,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 481 transitions, 6079 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:29,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:29,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:29,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:30,862 INFO L124 PetriNetUnfolderBase]: 3427/5750 cut-off events. [2024-06-20 15:20:30,862 INFO L125 PetriNetUnfolderBase]: For 459955/459967 co-relation queries the response was YES. [2024-06-20 15:20:30,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39520 conditions, 5750 events. 3427/5750 cut-off events. For 459955/459967 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 39343 event pairs, 826 based on Foata normal form. 20/5769 useless extension candidates. Maximal degree in co-relation 39334. Up to 5171 conditions per place. [2024-06-20 15:20:30,952 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 446 selfloop transitions, 48 changer transitions 0/501 dead transitions. [2024-06-20 15:20:30,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 501 transitions, 7182 flow [2024-06-20 15:20:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:20:30,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 15:20:30,953 INFO L175 Difference]: Start difference. First operand has 443 places, 481 transitions, 6079 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:20:30,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 501 transitions, 7182 flow [2024-06-20 15:20:33,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 501 transitions, 7003 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:20:33,868 INFO L231 Difference]: Finished difference. Result has 443 places, 482 transitions, 6037 flow [2024-06-20 15:20:33,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5900, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6037, PETRI_PLACES=443, PETRI_TRANSITIONS=482} [2024-06-20 15:20:33,869 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-20 15:20:33,869 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 482 transitions, 6037 flow [2024-06-20 15:20:33,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:33,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:33,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:33,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-20 15:20:33,869 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:33,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:33,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1017142608, now seen corresponding path program 5 times [2024-06-20 15:20:33,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:33,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093953684] [2024-06-20 15:20:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:33,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:34,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:34,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093953684] [2024-06-20 15:20:34,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093953684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:34,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:34,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:34,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278633145] [2024-06-20 15:20:34,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:34,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:34,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:34,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:34,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:34,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:34,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 482 transitions, 6037 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:34,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:34,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:34,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:35,194 INFO L124 PetriNetUnfolderBase]: 3455/5798 cut-off events. [2024-06-20 15:20:35,194 INFO L125 PetriNetUnfolderBase]: For 467193/467205 co-relation queries the response was YES. [2024-06-20 15:20:35,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39895 conditions, 5798 events. 3455/5798 cut-off events. For 467193/467205 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 39693 event pairs, 832 based on Foata normal form. 20/5817 useless extension candidates. Maximal degree in co-relation 39708. Up to 5215 conditions per place. [2024-06-20 15:20:35,286 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 446 selfloop transitions, 48 changer transitions 0/501 dead transitions. [2024-06-20 15:20:35,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 501 transitions, 7140 flow [2024-06-20 15:20:35,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:35,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:35,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 15:20:35,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-20 15:20:35,287 INFO L175 Difference]: Start difference. First operand has 443 places, 482 transitions, 6037 flow. Second operand 7 states and 162 transitions. [2024-06-20 15:20:35,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 501 transitions, 7140 flow [2024-06-20 15:20:38,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 501 transitions, 7034 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:38,056 INFO L231 Difference]: Finished difference. Result has 444 places, 483 transitions, 6070 flow [2024-06-20 15:20:38,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5931, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6070, PETRI_PLACES=444, PETRI_TRANSITIONS=483} [2024-06-20 15:20:38,057 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 403 predicate places. [2024-06-20 15:20:38,057 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 483 transitions, 6070 flow [2024-06-20 15:20:38,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:38,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:38,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:38,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-20 15:20:38,058 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:38,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:38,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1017290478, now seen corresponding path program 6 times [2024-06-20 15:20:38,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:38,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525695431] [2024-06-20 15:20:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:38,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:38,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:38,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525695431] [2024-06-20 15:20:38,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525695431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:38,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:38,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:38,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859644086] [2024-06-20 15:20:38,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:38,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:38,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:38,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:38,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:38,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:38,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 483 transitions, 6070 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:38,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:38,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:38,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:39,454 INFO L124 PetriNetUnfolderBase]: 3500/5869 cut-off events. [2024-06-20 15:20:39,454 INFO L125 PetriNetUnfolderBase]: For 463259/463271 co-relation queries the response was YES. [2024-06-20 15:20:39,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40412 conditions, 5869 events. 3500/5869 cut-off events. For 463259/463271 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 40220 event pairs, 760 based on Foata normal form. 18/5886 useless extension candidates. Maximal degree in co-relation 40224. Up to 5126 conditions per place. [2024-06-20 15:20:39,547 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 448 selfloop transitions, 57 changer transitions 0/512 dead transitions. [2024-06-20 15:20:39,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 512 transitions, 7280 flow [2024-06-20 15:20:39,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:39,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:20:39,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:20:39,548 INFO L175 Difference]: Start difference. First operand has 444 places, 483 transitions, 6070 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:20:39,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 512 transitions, 7280 flow [2024-06-20 15:20:42,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 512 transitions, 7172 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:20:42,711 INFO L231 Difference]: Finished difference. Result has 447 places, 488 transitions, 6197 flow [2024-06-20 15:20:42,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5962, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6197, PETRI_PLACES=447, PETRI_TRANSITIONS=488} [2024-06-20 15:20:42,712 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-20 15:20:42,712 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 488 transitions, 6197 flow [2024-06-20 15:20:42,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:42,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:42,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:42,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-20 15:20:42,712 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:42,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:42,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1017290850, now seen corresponding path program 4 times [2024-06-20 15:20:42,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:42,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541344138] [2024-06-20 15:20:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:42,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:42,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:42,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541344138] [2024-06-20 15:20:42,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541344138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:42,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:42,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:42,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862302333] [2024-06-20 15:20:42,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:42,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:42,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:42,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:42,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:42,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:42,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 488 transitions, 6197 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:42,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:42,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:42,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:44,106 INFO L124 PetriNetUnfolderBase]: 3487/5852 cut-off events. [2024-06-20 15:20:44,107 INFO L125 PetriNetUnfolderBase]: For 430656/430668 co-relation queries the response was YES. [2024-06-20 15:20:44,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39828 conditions, 5852 events. 3487/5852 cut-off events. For 430656/430668 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 40139 event pairs, 721 based on Foata normal form. 18/5869 useless extension candidates. Maximal degree in co-relation 39638. Up to 4754 conditions per place. [2024-06-20 15:20:44,342 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 432 selfloop transitions, 82 changer transitions 0/521 dead transitions. [2024-06-20 15:20:44,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 521 transitions, 7367 flow [2024-06-20 15:20:44,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:20:44,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-20 15:20:44,344 INFO L175 Difference]: Start difference. First operand has 447 places, 488 transitions, 6197 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:20:44,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 521 transitions, 7367 flow [2024-06-20 15:20:46,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 521 transitions, 7246 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 15:20:46,877 INFO L231 Difference]: Finished difference. Result has 449 places, 488 transitions, 6250 flow [2024-06-20 15:20:46,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6076, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6250, PETRI_PLACES=449, PETRI_TRANSITIONS=488} [2024-06-20 15:20:46,884 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 408 predicate places. [2024-06-20 15:20:46,884 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 488 transitions, 6250 flow [2024-06-20 15:20:46,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:46,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:46,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:46,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-20 15:20:46,884 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:46,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:46,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1011565212, now seen corresponding path program 1 times [2024-06-20 15:20:46,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:46,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717494761] [2024-06-20 15:20:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:46,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:47,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:47,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717494761] [2024-06-20 15:20:47,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717494761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:47,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:47,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:47,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984005698] [2024-06-20 15:20:47,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:47,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:47,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:47,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:47,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:47,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:47,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 488 transitions, 6250 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:47,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:47,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:47,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:48,173 INFO L124 PetriNetUnfolderBase]: 3523/5910 cut-off events. [2024-06-20 15:20:48,173 INFO L125 PetriNetUnfolderBase]: For 432370/432382 co-relation queries the response was YES. [2024-06-20 15:20:48,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40146 conditions, 5910 events. 3523/5910 cut-off events. For 432370/432382 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 40509 event pairs, 741 based on Foata normal form. 18/5927 useless extension candidates. Maximal degree in co-relation 39956. Up to 5105 conditions per place. [2024-06-20 15:20:48,260 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 439 selfloop transitions, 72 changer transitions 0/518 dead transitions. [2024-06-20 15:20:48,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 518 transitions, 7450 flow [2024-06-20 15:20:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:20:48,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:20:48,265 INFO L175 Difference]: Start difference. First operand has 449 places, 488 transitions, 6250 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:20:48,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 518 transitions, 7450 flow [2024-06-20 15:20:50,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 518 transitions, 7221 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:20:50,839 INFO L231 Difference]: Finished difference. Result has 450 places, 493 transitions, 6264 flow [2024-06-20 15:20:50,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6021, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6264, PETRI_PLACES=450, PETRI_TRANSITIONS=493} [2024-06-20 15:20:50,839 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 409 predicate places. [2024-06-20 15:20:50,839 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 493 transitions, 6264 flow [2024-06-20 15:20:50,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:50,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:50,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:50,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-20 15:20:50,840 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:50,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:50,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1011565026, now seen corresponding path program 1 times [2024-06-20 15:20:50,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:50,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899975034] [2024-06-20 15:20:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:50,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:51,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:51,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899975034] [2024-06-20 15:20:51,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899975034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:51,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:51,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:51,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226029755] [2024-06-20 15:20:51,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:51,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:51,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:51,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:51,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:51,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:51,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 493 transitions, 6264 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:51,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:51,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:51,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:52,212 INFO L124 PetriNetUnfolderBase]: 3543/5942 cut-off events. [2024-06-20 15:20:52,212 INFO L125 PetriNetUnfolderBase]: For 425713/425725 co-relation queries the response was YES. [2024-06-20 15:20:52,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40347 conditions, 5942 events. 3543/5942 cut-off events. For 425713/425725 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 40767 event pairs, 800 based on Foata normal form. 18/5959 useless extension candidates. Maximal degree in co-relation 40156. Up to 5195 conditions per place. [2024-06-20 15:20:52,301 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 447 selfloop transitions, 62 changer transitions 0/516 dead transitions. [2024-06-20 15:20:52,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 516 transitions, 7416 flow [2024-06-20 15:20:52,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:52,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 15:20:52,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-20 15:20:52,309 INFO L175 Difference]: Start difference. First operand has 450 places, 493 transitions, 6264 flow. Second operand 8 states and 183 transitions. [2024-06-20 15:20:52,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 516 transitions, 7416 flow [2024-06-20 15:20:54,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 516 transitions, 7283 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:54,851 INFO L231 Difference]: Finished difference. Result has 452 places, 494 transitions, 6291 flow [2024-06-20 15:20:54,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6131, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6291, PETRI_PLACES=452, PETRI_TRANSITIONS=494} [2024-06-20 15:20:54,852 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-20 15:20:54,852 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 494 transitions, 6291 flow [2024-06-20 15:20:54,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:54,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:54,852 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, 1] [2024-06-20 15:20:54,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-20 15:20:54,853 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:54,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:54,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1132526266, now seen corresponding path program 2 times [2024-06-20 15:20:54,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:54,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304251940] [2024-06-20 15:20:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:54,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:55,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:55,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304251940] [2024-06-20 15:20:55,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304251940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:55,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:55,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:55,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713893297] [2024-06-20 15:20:55,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:55,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:55,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:55,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:55,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:55,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:55,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 494 transitions, 6291 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:55,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:55,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:55,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:56,282 INFO L124 PetriNetUnfolderBase]: 3563/5974 cut-off events. [2024-06-20 15:20:56,282 INFO L125 PetriNetUnfolderBase]: For 426843/426855 co-relation queries the response was YES. [2024-06-20 15:20:56,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40536 conditions, 5974 events. 3563/5974 cut-off events. For 426843/426855 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 40996 event pairs, 804 based on Foata normal form. 18/5991 useless extension candidates. Maximal degree in co-relation 40345. Up to 5423 conditions per place. [2024-06-20 15:20:56,361 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 469 selfloop transitions, 35 changer transitions 0/511 dead transitions. [2024-06-20 15:20:56,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 511 transitions, 7383 flow [2024-06-20 15:20:56,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-20 15:20:56,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-20 15:20:56,362 INFO L175 Difference]: Start difference. First operand has 452 places, 494 transitions, 6291 flow. Second operand 7 states and 156 transitions. [2024-06-20 15:20:56,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 511 transitions, 7383 flow [2024-06-20 15:20:59,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 511 transitions, 7242 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:59,063 INFO L231 Difference]: Finished difference. Result has 452 places, 495 transitions, 6252 flow [2024-06-20 15:20:59,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6150, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6252, PETRI_PLACES=452, PETRI_TRANSITIONS=495} [2024-06-20 15:20:59,064 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-20 15:20:59,064 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 495 transitions, 6252 flow [2024-06-20 15:20:59,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:59,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:59,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:59,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-20 15:20:59,064 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:59,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:59,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1132646236, now seen corresponding path program 3 times [2024-06-20 15:20:59,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:59,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105506825] [2024-06-20 15:20:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:59,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:59,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:59,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105506825] [2024-06-20 15:20:59,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105506825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:59,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:59,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:20:59,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622653694] [2024-06-20 15:20:59,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:59,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:20:59,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:20:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:20:59,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:20:59,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 495 transitions, 6252 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:59,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:59,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:20:59,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:00,370 INFO L124 PetriNetUnfolderBase]: 3583/6003 cut-off events. [2024-06-20 15:21:00,370 INFO L125 PetriNetUnfolderBase]: For 426769/426777 co-relation queries the response was YES. [2024-06-20 15:21:00,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40601 conditions, 6003 events. 3583/6003 cut-off events. For 426769/426777 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 41072 event pairs, 829 based on Foata normal form. 11/6012 useless extension candidates. Maximal degree in co-relation 40410. Up to 4769 conditions per place. [2024-06-20 15:21:00,459 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 410 selfloop transitions, 100 changer transitions 0/517 dead transitions. [2024-06-20 15:21:00,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 517 transitions, 7434 flow [2024-06-20 15:21:00,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:21:00,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:21:00,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 15:21:00,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-20 15:21:00,460 INFO L175 Difference]: Start difference. First operand has 452 places, 495 transitions, 6252 flow. Second operand 7 states and 162 transitions. [2024-06-20 15:21:00,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 517 transitions, 7434 flow [2024-06-20 15:21:02,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 517 transitions, 7260 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 15:21:02,726 INFO L231 Difference]: Finished difference. Result has 452 places, 496 transitions, 6312 flow [2024-06-20 15:21:02,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6078, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6312, PETRI_PLACES=452, PETRI_TRANSITIONS=496} [2024-06-20 15:21:02,726 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-20 15:21:02,726 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 496 transitions, 6312 flow [2024-06-20 15:21:02,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:02,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:02,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:02,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-20 15:21:02,727 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:02,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:02,727 INFO L85 PathProgramCache]: Analyzing trace with hash 171123714, now seen corresponding path program 27 times [2024-06-20 15:21:02,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:02,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452187328] [2024-06-20 15:21:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:02,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:02,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:02,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452187328] [2024-06-20 15:21:02,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452187328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:02,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:02,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:02,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298696653] [2024-06-20 15:21:02,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:02,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:02,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:02,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:02,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:02,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:02,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 496 transitions, 6312 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:02,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:02,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:02,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:04,069 INFO L124 PetriNetUnfolderBase]: 3611/6054 cut-off events. [2024-06-20 15:21:04,070 INFO L125 PetriNetUnfolderBase]: For 448425/448437 co-relation queries the response was YES. [2024-06-20 15:21:04,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41003 conditions, 6054 events. 3611/6054 cut-off events. For 448425/448437 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 41747 event pairs, 867 based on Foata normal form. 20/6073 useless extension candidates. Maximal degree in co-relation 40813. Up to 5431 conditions per place. [2024-06-20 15:21:04,161 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 443 selfloop transitions, 70 changer transitions 0/520 dead transitions. [2024-06-20 15:21:04,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 520 transitions, 7466 flow [2024-06-20 15:21:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:21:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:21:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-20 15:21:04,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-20 15:21:04,162 INFO L175 Difference]: Start difference. First operand has 452 places, 496 transitions, 6312 flow. Second operand 9 states and 202 transitions. [2024-06-20 15:21:04,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 520 transitions, 7466 flow [2024-06-20 15:21:06,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 520 transitions, 7250 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:21:06,728 INFO L231 Difference]: Finished difference. Result has 456 places, 497 transitions, 6276 flow [2024-06-20 15:21:06,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6276, PETRI_PLACES=456, PETRI_TRANSITIONS=497} [2024-06-20 15:21:06,729 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-20 15:21:06,729 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 497 transitions, 6276 flow [2024-06-20 15:21:06,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:06,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:06,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:06,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-20 15:21:06,729 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:06,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:06,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1399118828, now seen corresponding path program 28 times [2024-06-20 15:21:06,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:06,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413753363] [2024-06-20 15:21:06,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:06,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:06,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:06,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413753363] [2024-06-20 15:21:06,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413753363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:06,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:06,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:06,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053347705] [2024-06-20 15:21:06,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:06,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:06,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:06,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:06,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:06,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:06,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 497 transitions, 6276 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:06,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:06,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:06,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:08,091 INFO L124 PetriNetUnfolderBase]: 3639/6095 cut-off events. [2024-06-20 15:21:08,091 INFO L125 PetriNetUnfolderBase]: For 454732/454740 co-relation queries the response was YES. [2024-06-20 15:21:08,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41173 conditions, 6095 events. 3639/6095 cut-off events. For 454732/454740 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 41971 event pairs, 895 based on Foata normal form. 13/6106 useless extension candidates. Maximal degree in co-relation 40982. Up to 5468 conditions per place. [2024-06-20 15:21:08,174 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 418 selfloop transitions, 89 changer transitions 0/514 dead transitions. [2024-06-20 15:21:08,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 514 transitions, 7402 flow [2024-06-20 15:21:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:08,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:08,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-20 15:21:08,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:21:08,176 INFO L175 Difference]: Start difference. First operand has 456 places, 497 transitions, 6276 flow. Second operand 8 states and 176 transitions. [2024-06-20 15:21:08,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 514 transitions, 7402 flow [2024-06-20 15:21:10,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 514 transitions, 7252 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 15:21:10,382 INFO L231 Difference]: Finished difference. Result has 457 places, 498 transitions, 6343 flow [2024-06-20 15:21:10,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6343, PETRI_PLACES=457, PETRI_TRANSITIONS=498} [2024-06-20 15:21:10,383 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-20 15:21:10,383 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 498 transitions, 6343 flow [2024-06-20 15:21:10,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:10,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:10,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:10,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-20 15:21:10,384 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:10,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:10,384 INFO L85 PathProgramCache]: Analyzing trace with hash -583194814, now seen corresponding path program 29 times [2024-06-20 15:21:10,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:10,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583010415] [2024-06-20 15:21:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:10,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:10,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:10,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583010415] [2024-06-20 15:21:10,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583010415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:10,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:10,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:10,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257792097] [2024-06-20 15:21:10,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:10,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:10,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:10,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:10,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:10,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:10,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 498 transitions, 6343 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:10,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:10,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:10,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:11,793 INFO L124 PetriNetUnfolderBase]: 3654/6120 cut-off events. [2024-06-20 15:21:11,793 INFO L125 PetriNetUnfolderBase]: For 448136/448144 co-relation queries the response was YES. [2024-06-20 15:21:11,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41160 conditions, 6120 events. 3654/6120 cut-off events. For 448136/448144 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 42226 event pairs, 892 based on Foata normal form. 13/6131 useless extension candidates. Maximal degree in co-relation 40968. Up to 5385 conditions per place. [2024-06-20 15:21:11,885 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 421 selfloop transitions, 91 changer transitions 0/519 dead transitions. [2024-06-20 15:21:11,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 519 transitions, 7533 flow [2024-06-20 15:21:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:11,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-20 15:21:11,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-20 15:21:11,886 INFO L175 Difference]: Start difference. First operand has 457 places, 498 transitions, 6343 flow. Second operand 8 states and 179 transitions. [2024-06-20 15:21:11,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 519 transitions, 7533 flow [2024-06-20 15:21:14,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 519 transitions, 7340 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:21:14,581 INFO L231 Difference]: Finished difference. Result has 459 places, 499 transitions, 6372 flow [2024-06-20 15:21:14,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6150, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6372, PETRI_PLACES=459, PETRI_TRANSITIONS=499} [2024-06-20 15:21:14,582 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-20 15:21:14,582 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 499 transitions, 6372 flow [2024-06-20 15:21:14,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:14,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:14,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:14,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-20 15:21:14,583 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:14,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:14,583 INFO L85 PathProgramCache]: Analyzing trace with hash -555158446, now seen corresponding path program 7 times [2024-06-20 15:21:14,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:14,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468586079] [2024-06-20 15:21:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:14,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:14,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:14,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468586079] [2024-06-20 15:21:14,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468586079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:14,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:14,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:14,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025716781] [2024-06-20 15:21:14,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:14,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:14,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:14,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:14,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:14,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:14,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 499 transitions, 6372 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:14,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:14,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:14,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:15,987 INFO L124 PetriNetUnfolderBase]: 3715/6224 cut-off events. [2024-06-20 15:21:15,987 INFO L125 PetriNetUnfolderBase]: For 483088/483100 co-relation queries the response was YES. [2024-06-20 15:21:16,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42584 conditions, 6224 events. 3715/6224 cut-off events. For 483088/483100 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 42998 event pairs, 799 based on Foata normal form. 18/6241 useless extension candidates. Maximal degree in co-relation 42391. Up to 5469 conditions per place. [2024-06-20 15:21:16,079 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 470 selfloop transitions, 59 changer transitions 0/536 dead transitions. [2024-06-20 15:21:16,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 536 transitions, 7863 flow [2024-06-20 15:21:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:21:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:21:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-20 15:21:16,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-20 15:21:16,081 INFO L175 Difference]: Start difference. First operand has 459 places, 499 transitions, 6372 flow. Second operand 9 states and 203 transitions. [2024-06-20 15:21:16,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 536 transitions, 7863 flow [2024-06-20 15:21:18,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 536 transitions, 7663 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:21:18,584 INFO L231 Difference]: Finished difference. Result has 462 places, 504 transitions, 6375 flow [2024-06-20 15:21:18,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6172, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6375, PETRI_PLACES=462, PETRI_TRANSITIONS=504} [2024-06-20 15:21:18,584 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 421 predicate places. [2024-06-20 15:21:18,584 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 504 transitions, 6375 flow [2024-06-20 15:21:18,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:18,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:18,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:18,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-20 15:21:18,593 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:18,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:18,593 INFO L85 PathProgramCache]: Analyzing trace with hash -212193680, now seen corresponding path program 8 times [2024-06-20 15:21:18,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:18,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810538398] [2024-06-20 15:21:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:18,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:18,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:18,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810538398] [2024-06-20 15:21:18,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810538398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:18,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:18,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:18,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093476375] [2024-06-20 15:21:18,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:18,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:18,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:18,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:18,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:18,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:18,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 504 transitions, 6375 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:18,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:18,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:18,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:20,114 INFO L124 PetriNetUnfolderBase]: 3735/6260 cut-off events. [2024-06-20 15:21:20,114 INFO L125 PetriNetUnfolderBase]: For 490006/490018 co-relation queries the response was YES. [2024-06-20 15:21:20,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42803 conditions, 6260 events. 3735/6260 cut-off events. For 490006/490018 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 43279 event pairs, 804 based on Foata normal form. 18/6277 useless extension candidates. Maximal degree in co-relation 42609. Up to 5546 conditions per place. [2024-06-20 15:21:20,214 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 463 selfloop transitions, 59 changer transitions 0/529 dead transitions. [2024-06-20 15:21:20,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 529 transitions, 7527 flow [2024-06-20 15:21:20,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:20,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 15:21:20,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 15:21:20,215 INFO L175 Difference]: Start difference. First operand has 462 places, 504 transitions, 6375 flow. Second operand 8 states and 180 transitions. [2024-06-20 15:21:20,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 529 transitions, 7527 flow [2024-06-20 15:21:22,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 529 transitions, 7368 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 15:21:22,940 INFO L231 Difference]: Finished difference. Result has 465 places, 505 transitions, 6370 flow [2024-06-20 15:21:22,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6222, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6370, PETRI_PLACES=465, PETRI_TRANSITIONS=505} [2024-06-20 15:21:22,940 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 424 predicate places. [2024-06-20 15:21:22,940 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 505 transitions, 6370 flow [2024-06-20 15:21:22,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:22,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:22,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:22,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-20 15:21:22,941 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:22,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:22,941 INFO L85 PathProgramCache]: Analyzing trace with hash -200479696, now seen corresponding path program 9 times [2024-06-20 15:21:22,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:22,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516839826] [2024-06-20 15:21:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:22,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:23,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:23,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516839826] [2024-06-20 15:21:23,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516839826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:23,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:23,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:23,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839405061] [2024-06-20 15:21:23,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:23,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:23,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:23,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:23,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:23,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:23,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 505 transitions, 6370 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:23,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:23,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:23,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:24,411 INFO L124 PetriNetUnfolderBase]: 3788/6349 cut-off events. [2024-06-20 15:21:24,411 INFO L125 PetriNetUnfolderBase]: For 541314/541326 co-relation queries the response was YES. [2024-06-20 15:21:24,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43910 conditions, 6349 events. 3788/6349 cut-off events. For 541314/541326 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 44042 event pairs, 871 based on Foata normal form. 18/6366 useless extension candidates. Maximal degree in co-relation 43717. Up to 4951 conditions per place. [2024-06-20 15:21:24,500 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 433 selfloop transitions, 97 changer transitions 0/537 dead transitions. [2024-06-20 15:21:24,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 537 transitions, 7882 flow [2024-06-20 15:21:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:24,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:24,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:21:24,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 15:21:24,501 INFO L175 Difference]: Start difference. First operand has 465 places, 505 transitions, 6370 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:21:24,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 537 transitions, 7882 flow [2024-06-20 15:21:27,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 537 transitions, 7723 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-20 15:21:27,989 INFO L231 Difference]: Finished difference. Result has 464 places, 507 transitions, 6477 flow [2024-06-20 15:21:27,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6217, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6477, PETRI_PLACES=464, PETRI_TRANSITIONS=507} [2024-06-20 15:21:27,989 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 423 predicate places. [2024-06-20 15:21:27,989 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 507 transitions, 6477 flow [2024-06-20 15:21:27,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:27,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:27,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:27,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-20 15:21:27,990 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:27,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:27,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1547199018, now seen corresponding path program 10 times [2024-06-20 15:21:27,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:27,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024377525] [2024-06-20 15:21:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:27,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:28,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:28,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024377525] [2024-06-20 15:21:28,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024377525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:28,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:28,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:28,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54509124] [2024-06-20 15:21:28,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:28,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:28,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:28,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:28,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:28,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:28,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 507 transitions, 6477 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:28,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:28,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:28,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:29,415 INFO L124 PetriNetUnfolderBase]: 3887/6500 cut-off events. [2024-06-20 15:21:29,415 INFO L125 PetriNetUnfolderBase]: For 629022/629034 co-relation queries the response was YES. [2024-06-20 15:21:29,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46860 conditions, 6500 events. 3887/6500 cut-off events. For 629022/629034 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 45263 event pairs, 946 based on Foata normal form. 18/6517 useless extension candidates. Maximal degree in co-relation 46669. Up to 5641 conditions per place. [2024-06-20 15:21:29,520 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 451 selfloop transitions, 79 changer transitions 0/537 dead transitions. [2024-06-20 15:21:29,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 537 transitions, 8245 flow [2024-06-20 15:21:29,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:29,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 15:21:29,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 15:21:29,521 INFO L175 Difference]: Start difference. First operand has 464 places, 507 transitions, 6477 flow. Second operand 8 states and 186 transitions. [2024-06-20 15:21:29,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 537 transitions, 8245 flow [2024-06-20 15:21:33,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 537 transitions, 8126 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 15:21:33,373 INFO L231 Difference]: Finished difference. Result has 469 places, 510 transitions, 6622 flow [2024-06-20 15:21:33,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6358, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6622, PETRI_PLACES=469, PETRI_TRANSITIONS=510} [2024-06-20 15:21:33,373 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 428 predicate places. [2024-06-20 15:21:33,373 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 510 transitions, 6622 flow [2024-06-20 15:21:33,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:33,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:33,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:33,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-20 15:21:33,374 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:33,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash -988545966, now seen corresponding path program 11 times [2024-06-20 15:21:33,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:33,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630388315] [2024-06-20 15:21:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:33,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:33,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:33,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630388315] [2024-06-20 15:21:33,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630388315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:33,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:33,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:33,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350516910] [2024-06-20 15:21:33,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:33,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:33,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:33,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:33,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:33,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:33,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 510 transitions, 6622 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:33,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:33,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:33,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:34,815 INFO L124 PetriNetUnfolderBase]: 3874/6477 cut-off events. [2024-06-20 15:21:34,816 INFO L125 PetriNetUnfolderBase]: For 596244/596256 co-relation queries the response was YES. [2024-06-20 15:21:34,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46205 conditions, 6477 events. 3874/6477 cut-off events. For 596244/596256 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 45089 event pairs, 956 based on Foata normal form. 18/6490 useless extension candidates. Maximal degree in co-relation 46011. Up to 5902 conditions per place. [2024-06-20 15:21:34,915 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 482 selfloop transitions, 41 changer transitions 0/530 dead transitions. [2024-06-20 15:21:34,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 530 transitions, 7736 flow [2024-06-20 15:21:34,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-20 15:21:34,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:21:34,916 INFO L175 Difference]: Start difference. First operand has 469 places, 510 transitions, 6622 flow. Second operand 8 states and 176 transitions. [2024-06-20 15:21:34,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 530 transitions, 7736 flow [2024-06-20 15:21:38,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 530 transitions, 7620 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 15:21:38,638 INFO L231 Difference]: Finished difference. Result has 474 places, 510 transitions, 6592 flow [2024-06-20 15:21:38,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6506, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6592, PETRI_PLACES=474, PETRI_TRANSITIONS=510} [2024-06-20 15:21:38,638 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 433 predicate places. [2024-06-20 15:21:38,639 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 510 transitions, 6592 flow [2024-06-20 15:21:38,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:38,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:38,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:38,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-20 15:21:38,639 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:38,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:38,639 INFO L85 PathProgramCache]: Analyzing trace with hash -854598066, now seen corresponding path program 12 times [2024-06-20 15:21:38,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:38,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575295593] [2024-06-20 15:21:38,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:38,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:38,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:38,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575295593] [2024-06-20 15:21:38,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575295593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:38,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:38,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:38,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900481416] [2024-06-20 15:21:38,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:38,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:38,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:38,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:38,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 510 transitions, 6592 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:38,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:38,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:38,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:40,076 INFO L124 PetriNetUnfolderBase]: 3902/6531 cut-off events. [2024-06-20 15:21:40,076 INFO L125 PetriNetUnfolderBase]: For 619620/619632 co-relation queries the response was YES. [2024-06-20 15:21:40,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46599 conditions, 6531 events. 3902/6531 cut-off events. For 619620/619632 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 45534 event pairs, 994 based on Foata normal form. 20/6550 useless extension candidates. Maximal degree in co-relation 46403. Up to 5901 conditions per place. [2024-06-20 15:21:40,192 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 451 selfloop transitions, 72 changer transitions 0/530 dead transitions. [2024-06-20 15:21:40,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 530 transitions, 7756 flow [2024-06-20 15:21:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-20 15:21:40,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-20 15:21:40,193 INFO L175 Difference]: Start difference. First operand has 474 places, 510 transitions, 6592 flow. Second operand 8 states and 179 transitions. [2024-06-20 15:21:40,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 530 transitions, 7756 flow [2024-06-20 15:21:43,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 530 transitions, 7660 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:21:43,591 INFO L231 Difference]: Finished difference. Result has 475 places, 511 transitions, 6681 flow [2024-06-20 15:21:43,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6681, PETRI_PLACES=475, PETRI_TRANSITIONS=511} [2024-06-20 15:21:43,592 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-20 15:21:43,592 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 511 transitions, 6681 flow [2024-06-20 15:21:43,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:43,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:43,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:43,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-20 15:21:43,593 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:43,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:43,593 INFO L85 PathProgramCache]: Analyzing trace with hash -846027186, now seen corresponding path program 13 times [2024-06-20 15:21:43,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:43,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983106426] [2024-06-20 15:21:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:43,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:43,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:43,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983106426] [2024-06-20 15:21:43,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983106426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:43,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:43,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:43,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208295084] [2024-06-20 15:21:43,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:43,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:43,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:43,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:43,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:43,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:43,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 511 transitions, 6681 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:43,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:43,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:43,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:45,037 INFO L124 PetriNetUnfolderBase]: 3884/6501 cut-off events. [2024-06-20 15:21:45,037 INFO L125 PetriNetUnfolderBase]: For 570195/570207 co-relation queries the response was YES. [2024-06-20 15:21:45,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45546 conditions, 6501 events. 3884/6501 cut-off events. For 570195/570207 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 45318 event pairs, 968 based on Foata normal form. 20/6520 useless extension candidates. Maximal degree in co-relation 45349. Up to 5767 conditions per place. [2024-06-20 15:21:45,150 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 453 selfloop transitions, 74 changer transitions 0/534 dead transitions. [2024-06-20 15:21:45,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 534 transitions, 7867 flow [2024-06-20 15:21:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:45,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 15:21:45,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-20 15:21:45,151 INFO L175 Difference]: Start difference. First operand has 475 places, 511 transitions, 6681 flow. Second operand 8 states and 182 transitions. [2024-06-20 15:21:45,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 534 transitions, 7867 flow [2024-06-20 15:21:48,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 534 transitions, 7696 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:21:48,587 INFO L231 Difference]: Finished difference. Result has 477 places, 511 transitions, 6662 flow [2024-06-20 15:21:48,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6510, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6662, PETRI_PLACES=477, PETRI_TRANSITIONS=511} [2024-06-20 15:21:48,588 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 436 predicate places. [2024-06-20 15:21:48,588 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 511 transitions, 6662 flow [2024-06-20 15:21:48,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:48,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:48,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:48,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-20 15:21:48,589 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:48,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:48,589 INFO L85 PathProgramCache]: Analyzing trace with hash -858567632, now seen corresponding path program 14 times [2024-06-20 15:21:48,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:48,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189859812] [2024-06-20 15:21:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:48,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:48,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:48,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189859812] [2024-06-20 15:21:48,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189859812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:48,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:48,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:48,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760823709] [2024-06-20 15:21:48,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:48,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:48,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:48,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:48,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:48,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:48,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 511 transitions, 6662 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:48,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:48,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:48,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:50,209 INFO L124 PetriNetUnfolderBase]: 3899/6530 cut-off events. [2024-06-20 15:21:50,210 INFO L125 PetriNetUnfolderBase]: For 561479/561491 co-relation queries the response was YES. [2024-06-20 15:21:50,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45449 conditions, 6530 events. 3899/6530 cut-off events. For 561479/561491 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 45578 event pairs, 983 based on Foata normal form. 20/6549 useless extension candidates. Maximal degree in co-relation 45251. Up to 5964 conditions per place. [2024-06-20 15:21:50,302 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 492 selfloop transitions, 34 changer transitions 0/533 dead transitions. [2024-06-20 15:21:50,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 533 transitions, 7842 flow [2024-06-20 15:21:50,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:21:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:21:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 15:21:50,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 15:21:50,304 INFO L175 Difference]: Start difference. First operand has 477 places, 511 transitions, 6662 flow. Second operand 7 states and 161 transitions. [2024-06-20 15:21:50,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 533 transitions, 7842 flow [2024-06-20 15:21:54,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 533 transitions, 7672 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:21:54,319 INFO L231 Difference]: Finished difference. Result has 477 places, 512 transitions, 6605 flow [2024-06-20 15:21:54,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6492, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6605, PETRI_PLACES=477, PETRI_TRANSITIONS=512} [2024-06-20 15:21:54,320 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 436 predicate places. [2024-06-20 15:21:54,320 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 512 transitions, 6605 flow [2024-06-20 15:21:54,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:54,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:54,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:54,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-20 15:21:54,321 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:54,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash -858715502, now seen corresponding path program 15 times [2024-06-20 15:21:54,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:54,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577410321] [2024-06-20 15:21:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:54,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:54,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:54,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577410321] [2024-06-20 15:21:54,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577410321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:54,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:54,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:54,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089222571] [2024-06-20 15:21:54,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:54,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:54,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:54,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:54,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:54,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 512 transitions, 6605 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:54,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:54,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:54,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:56,015 INFO L124 PetriNetUnfolderBase]: 3886/6511 cut-off events. [2024-06-20 15:21:56,016 INFO L125 PetriNetUnfolderBase]: For 508986/508998 co-relation queries the response was YES. [2024-06-20 15:21:56,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44449 conditions, 6511 events. 3886/6511 cut-off events. For 508986/508998 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 45439 event pairs, 970 based on Foata normal form. 18/6528 useless extension candidates. Maximal degree in co-relation 44250. Up to 5897 conditions per place. [2024-06-20 15:21:56,110 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 494 selfloop transitions, 39 changer transitions 0/540 dead transitions. [2024-06-20 15:21:56,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 540 transitions, 7799 flow [2024-06-20 15:21:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 15:21:56,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-20 15:21:56,111 INFO L175 Difference]: Start difference. First operand has 477 places, 512 transitions, 6605 flow. Second operand 8 states and 185 transitions. [2024-06-20 15:21:56,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 540 transitions, 7799 flow [2024-06-20 15:21:59,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 540 transitions, 7704 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 15:21:59,333 INFO L231 Difference]: Finished difference. Result has 480 places, 512 transitions, 6592 flow [2024-06-20 15:21:59,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6510, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6592, PETRI_PLACES=480, PETRI_TRANSITIONS=512} [2024-06-20 15:21:59,333 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-20 15:21:59,333 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 512 transitions, 6592 flow [2024-06-20 15:21:59,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:59,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:59,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:59,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-20 15:21:59,334 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:59,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:59,334 INFO L85 PathProgramCache]: Analyzing trace with hash -593018222, now seen corresponding path program 16 times [2024-06-20 15:21:59,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:59,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225818403] [2024-06-20 15:21:59,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:59,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:59,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:59,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225818403] [2024-06-20 15:21:59,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225818403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:59,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:59,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:21:59,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203117287] [2024-06-20 15:21:59,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:59,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:21:59,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:59,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:21:59,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:21:59,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:21:59,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 512 transitions, 6592 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:59,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:59,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:21:59,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:00,990 INFO L124 PetriNetUnfolderBase]: 3873/6492 cut-off events. [2024-06-20 15:22:00,990 INFO L125 PetriNetUnfolderBase]: For 467729/467741 co-relation queries the response was YES. [2024-06-20 15:22:01,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43440 conditions, 6492 events. 3873/6492 cut-off events. For 467729/467741 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 45359 event pairs, 867 based on Foata normal form. 18/6509 useless extension candidates. Maximal degree in co-relation 43240. Up to 5834 conditions per place. [2024-06-20 15:22:01,101 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 485 selfloop transitions, 45 changer transitions 0/537 dead transitions. [2024-06-20 15:22:01,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 537 transitions, 7734 flow [2024-06-20 15:22:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:01,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 15:22:01,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-20 15:22:01,103 INFO L175 Difference]: Start difference. First operand has 480 places, 512 transitions, 6592 flow. Second operand 7 states and 165 transitions. [2024-06-20 15:22:01,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 537 transitions, 7734 flow [2024-06-20 15:22:04,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 537 transitions, 7556 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:04,334 INFO L231 Difference]: Finished difference. Result has 480 places, 512 transitions, 6508 flow [2024-06-20 15:22:04,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6414, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6508, PETRI_PLACES=480, PETRI_TRANSITIONS=512} [2024-06-20 15:22:04,335 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-20 15:22:04,335 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 512 transitions, 6508 flow [2024-06-20 15:22:04,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:04,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:04,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:04,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-20 15:22:04,336 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:04,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash 171308412, now seen corresponding path program 17 times [2024-06-20 15:22:04,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:04,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636618706] [2024-06-20 15:22:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:04,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:04,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:04,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636618706] [2024-06-20 15:22:04,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636618706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:04,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:04,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:04,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667513188] [2024-06-20 15:22:04,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:04,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:04,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:04,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:04,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:04,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:04,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 512 transitions, 6508 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:04,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:04,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:04,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:05,944 INFO L124 PetriNetUnfolderBase]: 3901/6536 cut-off events. [2024-06-20 15:22:05,944 INFO L125 PetriNetUnfolderBase]: For 490500/490512 co-relation queries the response was YES. [2024-06-20 15:22:06,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43583 conditions, 6536 events. 3901/6536 cut-off events. For 490500/490512 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 45678 event pairs, 973 based on Foata normal form. 20/6555 useless extension candidates. Maximal degree in co-relation 43383. Up to 5925 conditions per place. [2024-06-20 15:22:06,058 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 458 selfloop transitions, 69 changer transitions 0/534 dead transitions. [2024-06-20 15:22:06,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 534 transitions, 7684 flow [2024-06-20 15:22:06,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:22:06,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:22:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-20 15:22:06,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-20 15:22:06,059 INFO L175 Difference]: Start difference. First operand has 480 places, 512 transitions, 6508 flow. Second operand 10 states and 215 transitions. [2024-06-20 15:22:06,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 534 transitions, 7684 flow [2024-06-20 15:22:09,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 534 transitions, 7502 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 15:22:09,059 INFO L231 Difference]: Finished difference. Result has 481 places, 513 transitions, 6505 flow [2024-06-20 15:22:09,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6328, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6505, PETRI_PLACES=481, PETRI_TRANSITIONS=513} [2024-06-20 15:22:09,059 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 440 predicate places. [2024-06-20 15:22:09,059 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 513 transitions, 6505 flow [2024-06-20 15:22:09,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:09,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:09,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:09,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-20 15:22:09,060 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:09,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:09,060 INFO L85 PathProgramCache]: Analyzing trace with hash -459070322, now seen corresponding path program 18 times [2024-06-20 15:22:09,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:09,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632920965] [2024-06-20 15:22:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:09,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:09,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:09,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632920965] [2024-06-20 15:22:09,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632920965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:09,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:09,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:09,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893932015] [2024-06-20 15:22:09,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:09,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:09,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:09,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:09,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:09,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:09,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 513 transitions, 6505 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:09,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:09,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:09,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:10,602 INFO L124 PetriNetUnfolderBase]: 3929/6580 cut-off events. [2024-06-20 15:22:10,602 INFO L125 PetriNetUnfolderBase]: For 498068/498080 co-relation queries the response was YES. [2024-06-20 15:22:10,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43788 conditions, 6580 events. 3929/6580 cut-off events. For 498068/498080 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 46032 event pairs, 993 based on Foata normal form. 20/6599 useless extension candidates. Maximal degree in co-relation 43589. Up to 5969 conditions per place. [2024-06-20 15:22:10,709 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 463 selfloop transitions, 62 changer transitions 0/532 dead transitions. [2024-06-20 15:22:10,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 532 transitions, 7671 flow [2024-06-20 15:22:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 15:22:10,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 15:22:10,711 INFO L175 Difference]: Start difference. First operand has 481 places, 513 transitions, 6505 flow. Second operand 7 states and 160 transitions. [2024-06-20 15:22:10,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 532 transitions, 7671 flow [2024-06-20 15:22:14,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 532 transitions, 7518 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 15:22:14,402 INFO L231 Difference]: Finished difference. Result has 480 places, 514 transitions, 6517 flow [2024-06-20 15:22:14,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6352, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6517, PETRI_PLACES=480, PETRI_TRANSITIONS=514} [2024-06-20 15:22:14,403 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-20 15:22:14,403 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 514 transitions, 6517 flow [2024-06-20 15:22:14,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:14,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:14,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:14,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-20 15:22:14,403 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:14,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:14,404 INFO L85 PathProgramCache]: Analyzing trace with hash 399209562, now seen corresponding path program 19 times [2024-06-20 15:22:14,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:14,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450863667] [2024-06-20 15:22:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:14,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:14,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:14,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450863667] [2024-06-20 15:22:14,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450863667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:14,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:14,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:14,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42910880] [2024-06-20 15:22:14,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:14,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:14,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:14,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:14,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:14,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:14,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 514 transitions, 6517 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:14,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:14,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:14,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:16,128 INFO L124 PetriNetUnfolderBase]: 3957/6624 cut-off events. [2024-06-20 15:22:16,128 INFO L125 PetriNetUnfolderBase]: For 506146/506158 co-relation queries the response was YES. [2024-06-20 15:22:16,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44161 conditions, 6624 events. 3957/6624 cut-off events. For 506146/506158 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 46333 event pairs, 993 based on Foata normal form. 20/6643 useless extension candidates. Maximal degree in co-relation 43961. Up to 6013 conditions per place. [2024-06-20 15:22:16,219 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 462 selfloop transitions, 66 changer transitions 0/535 dead transitions. [2024-06-20 15:22:16,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 535 transitions, 7695 flow [2024-06-20 15:22:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-20 15:22:16,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-20 15:22:16,220 INFO L175 Difference]: Start difference. First operand has 480 places, 514 transitions, 6517 flow. Second operand 9 states and 197 transitions. [2024-06-20 15:22:16,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 535 transitions, 7695 flow [2024-06-20 15:22:20,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 535 transitions, 7554 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:20,069 INFO L231 Difference]: Finished difference. Result has 484 places, 515 transitions, 6551 flow [2024-06-20 15:22:20,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6376, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6551, PETRI_PLACES=484, PETRI_TRANSITIONS=515} [2024-06-20 15:22:20,070 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-20 15:22:20,070 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 515 transitions, 6551 flow [2024-06-20 15:22:20,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:20,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:20,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:20,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-20 15:22:20,071 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:20,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:20,071 INFO L85 PathProgramCache]: Analyzing trace with hash -450499442, now seen corresponding path program 20 times [2024-06-20 15:22:20,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:20,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006147002] [2024-06-20 15:22:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:20,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:20,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:20,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006147002] [2024-06-20 15:22:20,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006147002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:20,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:20,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:20,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809063116] [2024-06-20 15:22:20,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:20,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:20,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:20,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:20,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:20,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 515 transitions, 6551 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:20,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:20,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:20,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:21,557 INFO L124 PetriNetUnfolderBase]: 3985/6668 cut-off events. [2024-06-20 15:22:21,558 INFO L125 PetriNetUnfolderBase]: For 513957/513969 co-relation queries the response was YES. [2024-06-20 15:22:21,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44556 conditions, 6668 events. 3985/6668 cut-off events. For 513957/513969 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 46740 event pairs, 999 based on Foata normal form. 20/6687 useless extension candidates. Maximal degree in co-relation 44355. Up to 5917 conditions per place. [2024-06-20 15:22:21,662 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 466 selfloop transitions, 65 changer transitions 0/538 dead transitions. [2024-06-20 15:22:21,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 538 transitions, 7781 flow [2024-06-20 15:22:21,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 15:22:21,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-20 15:22:21,664 INFO L175 Difference]: Start difference. First operand has 484 places, 515 transitions, 6551 flow. Second operand 7 states and 163 transitions. [2024-06-20 15:22:21,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 538 transitions, 7781 flow [2024-06-20 15:22:25,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 538 transitions, 7630 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:25,424 INFO L231 Difference]: Finished difference. Result has 484 places, 516 transitions, 6574 flow [2024-06-20 15:22:25,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6400, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6574, PETRI_PLACES=484, PETRI_TRANSITIONS=516} [2024-06-20 15:22:25,424 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-20 15:22:25,424 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 516 transitions, 6574 flow [2024-06-20 15:22:25,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:25,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:25,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:25,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-20 15:22:25,425 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:25,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:25,425 INFO L85 PathProgramCache]: Analyzing trace with hash 407780442, now seen corresponding path program 21 times [2024-06-20 15:22:25,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:25,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224948426] [2024-06-20 15:22:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:25,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:25,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:25,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224948426] [2024-06-20 15:22:25,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224948426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:25,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:25,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:25,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260356782] [2024-06-20 15:22:25,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:25,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:25,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:25,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:25,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:25,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:25,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 516 transitions, 6574 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:25,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:25,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:25,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:26,937 INFO L124 PetriNetUnfolderBase]: 4000/6693 cut-off events. [2024-06-20 15:22:26,937 INFO L125 PetriNetUnfolderBase]: For 504972/504984 co-relation queries the response was YES. [2024-06-20 15:22:27,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44533 conditions, 6693 events. 4000/6693 cut-off events. For 504972/504984 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 46979 event pairs, 1006 based on Foata normal form. 20/6712 useless extension candidates. Maximal degree in co-relation 44331. Up to 5942 conditions per place. [2024-06-20 15:22:27,048 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 465 selfloop transitions, 69 changer transitions 0/541 dead transitions. [2024-06-20 15:22:27,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 541 transitions, 7816 flow [2024-06-20 15:22:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-20 15:22:27,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 15:22:27,050 INFO L175 Difference]: Start difference. First operand has 484 places, 516 transitions, 6574 flow. Second operand 9 states and 200 transitions. [2024-06-20 15:22:27,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 541 transitions, 7816 flow [2024-06-20 15:22:30,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 541 transitions, 7664 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:30,657 INFO L231 Difference]: Finished difference. Result has 488 places, 517 transitions, 6606 flow [2024-06-20 15:22:30,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6422, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6606, PETRI_PLACES=488, PETRI_TRANSITIONS=517} [2024-06-20 15:22:30,658 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 447 predicate places. [2024-06-20 15:22:30,658 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 517 transitions, 6606 flow [2024-06-20 15:22:30,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:30,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:30,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:30,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-20 15:22:30,659 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:30,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:30,659 INFO L85 PathProgramCache]: Analyzing trace with hash -592602512, now seen corresponding path program 22 times [2024-06-20 15:22:30,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:30,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48721256] [2024-06-20 15:22:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:30,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:30,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:30,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48721256] [2024-06-20 15:22:30,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48721256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:30,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:30,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:30,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086708937] [2024-06-20 15:22:30,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:30,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:30,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:30,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:30,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:30,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:30,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 517 transitions, 6606 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:30,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:30,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:30,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:32,366 INFO L124 PetriNetUnfolderBase]: 3987/6674 cut-off events. [2024-06-20 15:22:32,366 INFO L125 PetriNetUnfolderBase]: For 443054/443066 co-relation queries the response was YES. [2024-06-20 15:22:32,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43484 conditions, 6674 events. 3987/6674 cut-off events. For 443054/443066 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 46880 event pairs, 912 based on Foata normal form. 18/6691 useless extension candidates. Maximal degree in co-relation 43281. Up to 5520 conditions per place. [2024-06-20 15:22:32,461 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 453 selfloop transitions, 84 changer transitions 0/544 dead transitions. [2024-06-20 15:22:32,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 544 transitions, 7826 flow [2024-06-20 15:22:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:22:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:22:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:22:32,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 15:22:32,462 INFO L175 Difference]: Start difference. First operand has 488 places, 517 transitions, 6606 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:22:32,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 544 transitions, 7826 flow [2024-06-20 15:22:35,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 544 transitions, 7654 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:35,654 INFO L231 Difference]: Finished difference. Result has 488 places, 517 transitions, 6606 flow [2024-06-20 15:22:35,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6434, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6606, PETRI_PLACES=488, PETRI_TRANSITIONS=517} [2024-06-20 15:22:35,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 447 predicate places. [2024-06-20 15:22:35,654 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 517 transitions, 6606 flow [2024-06-20 15:22:35,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:35,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:35,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:35,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-20 15:22:35,655 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:35,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:35,655 INFO L85 PathProgramCache]: Analyzing trace with hash 599620098, now seen corresponding path program 4 times [2024-06-20 15:22:35,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:35,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105466683] [2024-06-20 15:22:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:35,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:35,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:35,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105466683] [2024-06-20 15:22:35,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105466683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:35,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:35,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:35,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865219015] [2024-06-20 15:22:35,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:35,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:35,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:35,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:35,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:35,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:35,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 517 transitions, 6606 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:35,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:35,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:35,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:37,242 INFO L124 PetriNetUnfolderBase]: 4015/6720 cut-off events. [2024-06-20 15:22:37,242 INFO L125 PetriNetUnfolderBase]: For 448084/448096 co-relation queries the response was YES. [2024-06-20 15:22:37,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43801 conditions, 6720 events. 4015/6720 cut-off events. For 448084/448096 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 47243 event pairs, 995 based on Foata normal form. 18/6737 useless extension candidates. Maximal degree in co-relation 43597. Up to 6015 conditions per place. [2024-06-20 15:22:37,347 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 464 selfloop transitions, 76 changer transitions 0/547 dead transitions. [2024-06-20 15:22:37,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 547 transitions, 7860 flow [2024-06-20 15:22:37,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:22:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:22:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-20 15:22:37,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-20 15:22:37,349 INFO L175 Difference]: Start difference. First operand has 488 places, 517 transitions, 6606 flow. Second operand 10 states and 223 transitions. [2024-06-20 15:22:37,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 547 transitions, 7860 flow [2024-06-20 15:22:40,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 547 transitions, 7465 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-20 15:22:40,878 INFO L231 Difference]: Finished difference. Result has 490 places, 520 transitions, 6433 flow [2024-06-20 15:22:40,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6211, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6433, PETRI_PLACES=490, PETRI_TRANSITIONS=520} [2024-06-20 15:22:40,879 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 449 predicate places. [2024-06-20 15:22:40,879 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 520 transitions, 6433 flow [2024-06-20 15:22:40,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:40,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:40,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:40,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-20 15:22:40,879 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:40,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:40,880 INFO L85 PathProgramCache]: Analyzing trace with hash 599620284, now seen corresponding path program 2 times [2024-06-20 15:22:40,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:40,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421877655] [2024-06-20 15:22:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:40,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:41,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:41,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421877655] [2024-06-20 15:22:41,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421877655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:41,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:41,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:41,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85790319] [2024-06-20 15:22:41,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:41,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:41,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:41,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:41,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:41,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:41,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 520 transitions, 6433 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:41,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:41,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:41,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:42,478 INFO L124 PetriNetUnfolderBase]: 4035/6750 cut-off events. [2024-06-20 15:22:42,478 INFO L125 PetriNetUnfolderBase]: For 451826/451838 co-relation queries the response was YES. [2024-06-20 15:22:42,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43101 conditions, 6750 events. 4035/6750 cut-off events. For 451826/451838 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 47488 event pairs, 1027 based on Foata normal form. 18/6767 useless extension candidates. Maximal degree in co-relation 42898. Up to 6027 conditions per place. [2024-06-20 15:22:42,595 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 461 selfloop transitions, 77 changer transitions 0/545 dead transitions. [2024-06-20 15:22:42,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 545 transitions, 7647 flow [2024-06-20 15:22:42,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:22:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:22:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-20 15:22:42,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-20 15:22:42,596 INFO L175 Difference]: Start difference. First operand has 490 places, 520 transitions, 6433 flow. Second operand 10 states and 218 transitions. [2024-06-20 15:22:42,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 545 transitions, 7647 flow [2024-06-20 15:22:46,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 545 transitions, 7479 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 15:22:46,137 INFO L231 Difference]: Finished difference. Result has 492 places, 521 transitions, 6452 flow [2024-06-20 15:22:46,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6265, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6452, PETRI_PLACES=492, PETRI_TRANSITIONS=521} [2024-06-20 15:22:46,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 451 predicate places. [2024-06-20 15:22:46,138 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 521 transitions, 6452 flow [2024-06-20 15:22:46,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:46,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:46,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:46,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-20 15:22:46,139 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:46,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:46,139 INFO L85 PathProgramCache]: Analyzing trace with hash 614589564, now seen corresponding path program 3 times [2024-06-20 15:22:46,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:46,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301254924] [2024-06-20 15:22:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:46,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:46,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:46,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301254924] [2024-06-20 15:22:46,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301254924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:46,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:46,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:46,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337974879] [2024-06-20 15:22:46,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:46,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:46,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:46,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 521 transitions, 6452 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:46,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:46,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:46,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:47,668 INFO L124 PetriNetUnfolderBase]: 4055/6790 cut-off events. [2024-06-20 15:22:47,668 INFO L125 PetriNetUnfolderBase]: For 451866/451878 co-relation queries the response was YES. [2024-06-20 15:22:47,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43251 conditions, 6790 events. 4055/6790 cut-off events. For 451866/451878 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 47790 event pairs, 951 based on Foata normal form. 18/6807 useless extension candidates. Maximal degree in co-relation 43048. Up to 5622 conditions per place. [2024-06-20 15:22:47,769 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 450 selfloop transitions, 92 changer transitions 0/549 dead transitions. [2024-06-20 15:22:47,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 549 transitions, 7964 flow [2024-06-20 15:22:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:47,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:47,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-20 15:22:47,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-20 15:22:47,770 INFO L175 Difference]: Start difference. First operand has 492 places, 521 transitions, 6452 flow. Second operand 9 states and 203 transitions. [2024-06-20 15:22:47,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 549 transitions, 7964 flow [2024-06-20 15:22:51,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 549 transitions, 7795 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 15:22:51,076 INFO L231 Difference]: Finished difference. Result has 493 places, 522 transitions, 6499 flow [2024-06-20 15:22:51,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6283, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6499, PETRI_PLACES=493, PETRI_TRANSITIONS=522} [2024-06-20 15:22:51,077 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 452 predicate places. [2024-06-20 15:22:51,077 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 522 transitions, 6499 flow [2024-06-20 15:22:51,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:51,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:51,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:51,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-20 15:22:51,078 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:51,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:51,078 INFO L85 PathProgramCache]: Analyzing trace with hash 614352228, now seen corresponding path program 5 times [2024-06-20 15:22:51,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:51,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022378017] [2024-06-20 15:22:51,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:51,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:51,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:51,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022378017] [2024-06-20 15:22:51,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022378017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:51,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:51,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:51,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867404738] [2024-06-20 15:22:51,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:51,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:51,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:51,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:51,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:51,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:51,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 522 transitions, 6499 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:51,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:51,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:51,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:52,590 INFO L124 PetriNetUnfolderBase]: 4083/6838 cut-off events. [2024-06-20 15:22:52,590 INFO L125 PetriNetUnfolderBase]: For 459092/459104 co-relation queries the response was YES. [2024-06-20 15:22:52,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43740 conditions, 6838 events. 4083/6838 cut-off events. For 459092/459104 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 48186 event pairs, 901 based on Foata normal form. 18/6855 useless extension candidates. Maximal degree in co-relation 43536. Up to 5795 conditions per place. [2024-06-20 15:22:52,694 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 454 selfloop transitions, 91 changer transitions 0/552 dead transitions. [2024-06-20 15:22:52,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 552 transitions, 7769 flow [2024-06-20 15:22:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:52,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-20 15:22:52,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-20 15:22:52,696 INFO L175 Difference]: Start difference. First operand has 493 places, 522 transitions, 6499 flow. Second operand 9 states and 205 transitions. [2024-06-20 15:22:52,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 552 transitions, 7769 flow [2024-06-20 15:22:56,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 552 transitions, 7512 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:56,556 INFO L231 Difference]: Finished difference. Result has 496 places, 525 transitions, 6494 flow [2024-06-20 15:22:56,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6494, PETRI_PLACES=496, PETRI_TRANSITIONS=525} [2024-06-20 15:22:56,557 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 455 predicate places. [2024-06-20 15:22:56,557 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 525 transitions, 6494 flow [2024-06-20 15:22:56,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:56,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:56,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:56,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-20 15:22:56,558 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:56,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:56,558 INFO L85 PathProgramCache]: Analyzing trace with hash 614352414, now seen corresponding path program 4 times [2024-06-20 15:22:56,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:56,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734797609] [2024-06-20 15:22:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:56,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:56,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:56,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734797609] [2024-06-20 15:22:56,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734797609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:56,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:56,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:22:56,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882008481] [2024-06-20 15:22:56,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:56,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:22:56,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:56,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:22:56,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:22:56,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:22:56,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 525 transitions, 6494 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:56,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:56,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:22:56,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:58,095 INFO L124 PetriNetUnfolderBase]: 4070/6819 cut-off events. [2024-06-20 15:22:58,096 INFO L125 PetriNetUnfolderBase]: For 411854/411866 co-relation queries the response was YES. [2024-06-20 15:22:58,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42370 conditions, 6819 events. 4070/6819 cut-off events. For 411854/411866 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 48090 event pairs, 929 based on Foata normal form. 18/6836 useless extension candidates. Maximal degree in co-relation 42165. Up to 5652 conditions per place. [2024-06-20 15:22:58,203 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 452 selfloop transitions, 93 changer transitions 0/552 dead transitions. [2024-06-20 15:22:58,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 552 transitions, 7742 flow [2024-06-20 15:22:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:58,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-20 15:22:58,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 15:22:58,205 INFO L175 Difference]: Start difference. First operand has 496 places, 525 transitions, 6494 flow. Second operand 9 states and 204 transitions. [2024-06-20 15:22:58,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 552 transitions, 7742 flow [2024-06-20 15:23:01,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 552 transitions, 7522 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-20 15:23:01,518 INFO L231 Difference]: Finished difference. Result has 498 places, 525 transitions, 6465 flow [2024-06-20 15:23:01,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6274, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6465, PETRI_PLACES=498, PETRI_TRANSITIONS=525} [2024-06-20 15:23:01,519 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2024-06-20 15:23:01,519 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 525 transitions, 6465 flow [2024-06-20 15:23:01,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:01,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:01,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:01,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-20 15:23:01,519 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:01,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash -457237660, now seen corresponding path program 6 times [2024-06-20 15:23:01,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:01,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249126380] [2024-06-20 15:23:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:01,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:01,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:01,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249126380] [2024-06-20 15:23:01,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249126380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:01,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:01,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:23:01,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305582540] [2024-06-20 15:23:01,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:01,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:23:01,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:01,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:23:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:23:01,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:01,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 525 transitions, 6465 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:01,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:01,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:01,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:03,049 INFO L124 PetriNetUnfolderBase]: 4090/6845 cut-off events. [2024-06-20 15:23:03,049 INFO L125 PetriNetUnfolderBase]: For 411095/411107 co-relation queries the response was YES. [2024-06-20 15:23:03,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42484 conditions, 6845 events. 4090/6845 cut-off events. For 411095/411107 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 48198 event pairs, 1044 based on Foata normal form. 18/6862 useless extension candidates. Maximal degree in co-relation 42279. Up to 6276 conditions per place. [2024-06-20 15:23:03,156 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 501 selfloop transitions, 35 changer transitions 0/543 dead transitions. [2024-06-20 15:23:03,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 543 transitions, 7637 flow [2024-06-20 15:23:03,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-20 15:23:03,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540625 [2024-06-20 15:23:03,158 INFO L175 Difference]: Start difference. First operand has 498 places, 525 transitions, 6465 flow. Second operand 8 states and 173 transitions. [2024-06-20 15:23:03,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 543 transitions, 7637 flow [2024-06-20 15:23:06,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 543 transitions, 7436 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:23:06,492 INFO L231 Difference]: Finished difference. Result has 498 places, 526 transitions, 6380 flow [2024-06-20 15:23:06,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6264, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6380, PETRI_PLACES=498, PETRI_TRANSITIONS=526} [2024-06-20 15:23:06,493 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2024-06-20 15:23:06,493 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 526 transitions, 6380 flow [2024-06-20 15:23:06,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:06,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:06,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:06,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-20 15:23:06,493 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:06,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:06,494 INFO L85 PathProgramCache]: Analyzing trace with hash 379035672, now seen corresponding path program 7 times [2024-06-20 15:23:06,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:06,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224970414] [2024-06-20 15:23:06,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:06,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:06,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:06,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224970414] [2024-06-20 15:23:06,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224970414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:06,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:06,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:23:06,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714163674] [2024-06-20 15:23:06,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:06,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:23:06,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:06,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:23:06,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:23:06,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:06,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 526 transitions, 6380 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:06,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:06,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:06,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:08,150 INFO L124 PetriNetUnfolderBase]: 4110/6882 cut-off events. [2024-06-20 15:23:08,150 INFO L125 PetriNetUnfolderBase]: For 412418/412426 co-relation queries the response was YES. [2024-06-20 15:23:08,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42493 conditions, 6882 events. 4110/6882 cut-off events. For 412418/412426 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 48641 event pairs, 1052 based on Foata normal form. 11/6891 useless extension candidates. Maximal degree in co-relation 42287. Up to 5989 conditions per place. [2024-06-20 15:23:08,245 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 445 selfloop transitions, 97 changer transitions 0/549 dead transitions. [2024-06-20 15:23:08,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 549 transitions, 7642 flow [2024-06-20 15:23:08,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:08,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-20 15:23:08,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-20 15:23:08,247 INFO L175 Difference]: Start difference. First operand has 498 places, 526 transitions, 6380 flow. Second operand 8 states and 181 transitions. [2024-06-20 15:23:08,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 549 transitions, 7642 flow [2024-06-20 15:23:10,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 549 transitions, 7514 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 15:23:10,588 INFO L231 Difference]: Finished difference. Result has 499 places, 527 transitions, 6494 flow [2024-06-20 15:23:10,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6252, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6494, PETRI_PLACES=499, PETRI_TRANSITIONS=527} [2024-06-20 15:23:10,589 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2024-06-20 15:23:10,589 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 527 transitions, 6494 flow [2024-06-20 15:23:10,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:10,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:10,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:10,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-20 15:23:10,590 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:10,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:10,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1458163052, now seen corresponding path program 8 times [2024-06-20 15:23:10,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:10,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245662181] [2024-06-20 15:23:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:10,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:10,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:10,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245662181] [2024-06-20 15:23:10,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245662181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:10,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:10,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:23:10,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113153010] [2024-06-20 15:23:10,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:10,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:23:10,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:23:10,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:23:10,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:10,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 527 transitions, 6494 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:10,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:10,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:10,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:12,221 INFO L124 PetriNetUnfolderBase]: 4171/6986 cut-off events. [2024-06-20 15:23:12,222 INFO L125 PetriNetUnfolderBase]: For 476144/476156 co-relation queries the response was YES. [2024-06-20 15:23:12,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44279 conditions, 6986 events. 4171/6986 cut-off events. For 476144/476156 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 49527 event pairs, 969 based on Foata normal form. 18/7003 useless extension candidates. Maximal degree in co-relation 44073. Up to 6246 conditions per place. [2024-06-20 15:23:12,338 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 494 selfloop transitions, 53 changer transitions 0/554 dead transitions. [2024-06-20 15:23:12,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 554 transitions, 8054 flow [2024-06-20 15:23:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:23:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:23:12,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-20 15:23:12,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-06-20 15:23:12,339 INFO L175 Difference]: Start difference. First operand has 499 places, 527 transitions, 6494 flow. Second operand 9 states and 194 transitions. [2024-06-20 15:23:12,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 554 transitions, 8054 flow [2024-06-20 15:23:16,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 554 transitions, 7823 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 15:23:16,095 INFO L231 Difference]: Finished difference. Result has 501 places, 531 transitions, 6479 flow [2024-06-20 15:23:16,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6265, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6479, PETRI_PLACES=501, PETRI_TRANSITIONS=531} [2024-06-20 15:23:16,095 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 460 predicate places. [2024-06-20 15:23:16,095 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 531 transitions, 6479 flow [2024-06-20 15:23:16,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:16,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:16,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:16,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-20 15:23:16,096 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:16,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:16,096 INFO L85 PathProgramCache]: Analyzing trace with hash -644023708, now seen corresponding path program 9 times [2024-06-20 15:23:16,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:16,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471111900] [2024-06-20 15:23:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:16,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:16,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:16,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471111900] [2024-06-20 15:23:16,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471111900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:16,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:16,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:23:16,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893062359] [2024-06-20 15:23:16,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:16,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:23:16,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:16,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:23:16,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:23:16,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:16,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 531 transitions, 6479 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:16,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:16,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:16,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:17,599 INFO L124 PetriNetUnfolderBase]: 4158/6967 cut-off events. [2024-06-20 15:23:17,600 INFO L125 PetriNetUnfolderBase]: For 419801/419813 co-relation queries the response was YES. [2024-06-20 15:23:17,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43018 conditions, 6967 events. 4158/6967 cut-off events. For 419801/419813 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 49413 event pairs, 967 based on Foata normal form. 18/6984 useless extension candidates. Maximal degree in co-relation 42812. Up to 6312 conditions per place. [2024-06-20 15:23:17,707 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 492 selfloop transitions, 50 changer transitions 0/549 dead transitions. [2024-06-20 15:23:17,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 549 transitions, 7625 flow [2024-06-20 15:23:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-20 15:23:17,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-20 15:23:17,708 INFO L175 Difference]: Start difference. First operand has 501 places, 531 transitions, 6479 flow. Second operand 8 states and 174 transitions. [2024-06-20 15:23:17,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 549 transitions, 7625 flow [2024-06-20 15:23:20,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 549 transitions, 7498 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 15:23:20,343 INFO L231 Difference]: Finished difference. Result has 505 places, 531 transitions, 6456 flow [2024-06-20 15:23:20,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6352, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6456, PETRI_PLACES=505, PETRI_TRANSITIONS=531} [2024-06-20 15:23:20,344 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 464 predicate places. [2024-06-20 15:23:20,344 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 531 transitions, 6456 flow [2024-06-20 15:23:20,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:20,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:20,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:20,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-20 15:23:20,345 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:20,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:20,345 INFO L85 PathProgramCache]: Analyzing trace with hash 328462586, now seen corresponding path program 10 times [2024-06-20 15:23:20,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:20,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002091172] [2024-06-20 15:23:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:20,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:20,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:20,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002091172] [2024-06-20 15:23:20,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002091172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:20,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:20,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:23:20,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486816813] [2024-06-20 15:23:20,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:20,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:23:20,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:20,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:23:20,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:23:20,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:20,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 531 transitions, 6456 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:20,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:20,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:20,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:22,247 INFO L124 PetriNetUnfolderBase]: 4145/6945 cut-off events. [2024-06-20 15:23:22,247 INFO L125 PetriNetUnfolderBase]: For 364766/364774 co-relation queries the response was YES. [2024-06-20 15:23:22,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41785 conditions, 6945 events. 4145/6945 cut-off events. For 364766/364774 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 49022 event pairs, 1025 based on Foata normal form. 11/6954 useless extension candidates. Maximal degree in co-relation 41578. Up to 5226 conditions per place. [2024-06-20 15:23:22,348 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 422 selfloop transitions, 125 changer transitions 0/554 dead transitions. [2024-06-20 15:23:22,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 554 transitions, 7688 flow [2024-06-20 15:23:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-20 15:23:22,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-20 15:23:22,349 INFO L175 Difference]: Start difference. First operand has 505 places, 531 transitions, 6456 flow. Second operand 8 states and 181 transitions. [2024-06-20 15:23:22,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 554 transitions, 7688 flow [2024-06-20 15:23:25,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 554 transitions, 7562 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:23:25,445 INFO L231 Difference]: Finished difference. Result has 505 places, 531 transitions, 6584 flow [2024-06-20 15:23:25,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6330, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6584, PETRI_PLACES=505, PETRI_TRANSITIONS=531} [2024-06-20 15:23:25,445 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 464 predicate places. [2024-06-20 15:23:25,445 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 531 transitions, 6584 flow [2024-06-20 15:23:25,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:25,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:25,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:25,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-20 15:23:25,446 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:25,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:25,446 INFO L85 PathProgramCache]: Analyzing trace with hash -839813868, now seen corresponding path program 1 times [2024-06-20 15:23:25,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:25,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405691829] [2024-06-20 15:23:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:25,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:25,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:25,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405691829] [2024-06-20 15:23:25,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405691829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:25,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:25,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:23:25,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231528801] [2024-06-20 15:23:25,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:25,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:23:25,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:25,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:23:25,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:23:25,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:25,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 531 transitions, 6584 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:25,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:25,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:25,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:27,263 INFO L124 PetriNetUnfolderBase]: 4434/7466 cut-off events. [2024-06-20 15:23:27,263 INFO L125 PetriNetUnfolderBase]: For 944983/944991 co-relation queries the response was YES. [2024-06-20 15:23:27,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51665 conditions, 7466 events. 4434/7466 cut-off events. For 944983/944991 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 53325 event pairs, 1057 based on Foata normal form. 26/7490 useless extension candidates. Maximal degree in co-relation 51457. Up to 2793 conditions per place. [2024-06-20 15:23:27,385 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 330 selfloop transitions, 234 changer transitions 16/587 dead transitions. [2024-06-20 15:23:27,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 587 transitions, 8644 flow [2024-06-20 15:23:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:23:27,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:23:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-20 15:23:27,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068181818181818 [2024-06-20 15:23:27,386 INFO L175 Difference]: Start difference. First operand has 505 places, 531 transitions, 6584 flow. Second operand 11 states and 267 transitions. [2024-06-20 15:23:27,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 587 transitions, 8644 flow [2024-06-20 15:23:34,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 587 transitions, 8256 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-20 15:23:34,501 INFO L231 Difference]: Finished difference. Result has 508 places, 528 transitions, 6638 flow [2024-06-20 15:23:34,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6196, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6638, PETRI_PLACES=508, PETRI_TRANSITIONS=528} [2024-06-20 15:23:34,501 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 467 predicate places. [2024-06-20 15:23:34,501 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 528 transitions, 6638 flow [2024-06-20 15:23:34,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:34,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:34,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:34,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-20 15:23:34,502 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:34,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:34,502 INFO L85 PathProgramCache]: Analyzing trace with hash 119382632, now seen corresponding path program 2 times [2024-06-20 15:23:34,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:34,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057210570] [2024-06-20 15:23:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:34,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:34,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:34,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057210570] [2024-06-20 15:23:34,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057210570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:34,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:34,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:23:34,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55542258] [2024-06-20 15:23:34,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:34,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:23:34,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:34,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:23:34,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:23:34,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:34,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 528 transitions, 6638 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:34,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:34,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:34,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:36,366 INFO L124 PetriNetUnfolderBase]: 4444/7485 cut-off events. [2024-06-20 15:23:36,367 INFO L125 PetriNetUnfolderBase]: For 1123322/1123334 co-relation queries the response was YES. [2024-06-20 15:23:36,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53624 conditions, 7485 events. 4444/7485 cut-off events. For 1123322/1123334 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 53626 event pairs, 926 based on Foata normal form. 30/7514 useless extension candidates. Maximal degree in co-relation 53417. Up to 5422 conditions per place. [2024-06-20 15:23:36,489 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 433 selfloop transitions, 129 changer transitions 8/577 dead transitions. [2024-06-20 15:23:36,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 577 transitions, 8354 flow [2024-06-20 15:23:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:23:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:23:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-20 15:23:36,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-06-20 15:23:36,492 INFO L175 Difference]: Start difference. First operand has 508 places, 528 transitions, 6638 flow. Second operand 11 states and 256 transitions. [2024-06-20 15:23:36,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 577 transitions, 8354 flow [2024-06-20 15:23:43,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 577 transitions, 7892 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 15:23:43,165 INFO L231 Difference]: Finished difference. Result has 506 places, 526 transitions, 6425 flow [2024-06-20 15:23:43,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6425, PETRI_PLACES=506, PETRI_TRANSITIONS=526} [2024-06-20 15:23:43,166 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 465 predicate places. [2024-06-20 15:23:43,166 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 526 transitions, 6425 flow [2024-06-20 15:23:43,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:43,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:43,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:43,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-20 15:23:43,167 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:43,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:43,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1116196246, now seen corresponding path program 3 times [2024-06-20 15:23:43,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:43,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73651717] [2024-06-20 15:23:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:43,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:43,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:43,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73651717] [2024-06-20 15:23:43,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73651717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:43,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:43,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:23:43,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50892694] [2024-06-20 15:23:43,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:43,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:23:43,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:43,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:23:43,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:23:43,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:43,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 526 transitions, 6425 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:43,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:43,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:43,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:45,102 INFO L124 PetriNetUnfolderBase]: 4212/7077 cut-off events. [2024-06-20 15:23:45,103 INFO L125 PetriNetUnfolderBase]: For 701657/701669 co-relation queries the response was YES. [2024-06-20 15:23:45,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45666 conditions, 7077 events. 4212/7077 cut-off events. For 701657/701669 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 50210 event pairs, 825 based on Foata normal form. 30/7106 useless extension candidates. Maximal degree in co-relation 45460. Up to 5217 conditions per place. [2024-06-20 15:23:45,217 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 418 selfloop transitions, 126 changer transitions 19/570 dead transitions. [2024-06-20 15:23:45,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 570 transitions, 7801 flow [2024-06-20 15:23:45,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:23:45,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:23:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-20 15:23:45,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-20 15:23:45,218 INFO L175 Difference]: Start difference. First operand has 506 places, 526 transitions, 6425 flow. Second operand 11 states and 250 transitions. [2024-06-20 15:23:45,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 570 transitions, 7801 flow [2024-06-20 15:23:49,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 570 transitions, 7540 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:23:49,642 INFO L231 Difference]: Finished difference. Result has 505 places, 522 transitions, 6369 flow [2024-06-20 15:23:49,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6164, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6369, PETRI_PLACES=505, PETRI_TRANSITIONS=522} [2024-06-20 15:23:49,643 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 464 predicate places. [2024-06-20 15:23:49,643 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 522 transitions, 6369 flow [2024-06-20 15:23:49,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:49,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:49,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:49,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-20 15:23:49,644 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:49,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:49,644 INFO L85 PathProgramCache]: Analyzing trace with hash 263480552, now seen corresponding path program 4 times [2024-06-20 15:23:49,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:49,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510402910] [2024-06-20 15:23:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:49,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:49,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:49,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510402910] [2024-06-20 15:23:49,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510402910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:49,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:49,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:23:49,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862748604] [2024-06-20 15:23:49,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:49,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:23:49,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:49,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:23:49,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:23:49,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:49,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 522 transitions, 6369 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:49,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:49,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:49,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:51,413 INFO L124 PetriNetUnfolderBase]: 4333/7298 cut-off events. [2024-06-20 15:23:51,413 INFO L125 PetriNetUnfolderBase]: For 1019541/1019553 co-relation queries the response was YES. [2024-06-20 15:23:51,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51397 conditions, 7298 events. 4333/7298 cut-off events. For 1019541/1019553 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 51962 event pairs, 933 based on Foata normal form. 30/7327 useless extension candidates. Maximal degree in co-relation 51192. Up to 5061 conditions per place. [2024-06-20 15:23:51,527 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 428 selfloop transitions, 125 changer transitions 13/573 dead transitions. [2024-06-20 15:23:51,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 573 transitions, 8071 flow [2024-06-20 15:23:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:23:51,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:23:51,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 287 transitions. [2024-06-20 15:23:51,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551923076923077 [2024-06-20 15:23:51,528 INFO L175 Difference]: Start difference. First operand has 505 places, 522 transitions, 6369 flow. Second operand 13 states and 287 transitions. [2024-06-20 15:23:51,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 573 transitions, 8071 flow [2024-06-20 15:23:57,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 573 transitions, 7792 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:23:57,991 INFO L231 Difference]: Finished difference. Result has 501 places, 519 transitions, 6304 flow [2024-06-20 15:23:57,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6304, PETRI_PLACES=501, PETRI_TRANSITIONS=519} [2024-06-20 15:23:57,991 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 460 predicate places. [2024-06-20 15:23:57,992 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 519 transitions, 6304 flow [2024-06-20 15:23:57,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:57,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:57,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:57,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-20 15:23:57,992 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:57,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:57,993 INFO L85 PathProgramCache]: Analyzing trace with hash 263273162, now seen corresponding path program 5 times [2024-06-20 15:23:57,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:57,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024891525] [2024-06-20 15:23:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:57,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:58,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:58,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024891525] [2024-06-20 15:23:58,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024891525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:58,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:58,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:23:58,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897450277] [2024-06-20 15:23:58,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:58,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:23:58,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:58,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:23:58,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:23:58,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:23:58,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 519 transitions, 6304 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:58,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:58,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:23:58,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:59,751 INFO L124 PetriNetUnfolderBase]: 4289/7234 cut-off events. [2024-06-20 15:23:59,751 INFO L125 PetriNetUnfolderBase]: For 1019020/1019032 co-relation queries the response was YES. [2024-06-20 15:23:59,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50872 conditions, 7234 events. 4289/7234 cut-off events. For 1019020/1019032 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 51503 event pairs, 941 based on Foata normal form. 30/7263 useless extension candidates. Maximal degree in co-relation 50668. Up to 5061 conditions per place. [2024-06-20 15:23:59,861 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 437 selfloop transitions, 119 changer transitions 8/571 dead transitions. [2024-06-20 15:23:59,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 571 transitions, 8298 flow [2024-06-20 15:23:59,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:23:59,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:23:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 274 transitions. [2024-06-20 15:23:59,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-20 15:23:59,862 INFO L175 Difference]: Start difference. First operand has 501 places, 519 transitions, 6304 flow. Second operand 12 states and 274 transitions. [2024-06-20 15:23:59,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 571 transitions, 8298 flow [2024-06-20 15:24:07,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 571 transitions, 8048 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:24:07,829 INFO L231 Difference]: Finished difference. Result has 499 places, 517 transitions, 6282 flow [2024-06-20 15:24:07,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6058, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6282, PETRI_PLACES=499, PETRI_TRANSITIONS=517} [2024-06-20 15:24:07,830 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2024-06-20 15:24:07,830 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 517 transitions, 6282 flow [2024-06-20 15:24:07,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:07,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:07,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:07,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-20 15:24:07,830 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:07,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:07,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1315498036, now seen corresponding path program 6 times [2024-06-20 15:24:07,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:07,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124267100] [2024-06-20 15:24:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:07,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:07,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:07,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124267100] [2024-06-20 15:24:07,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124267100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:07,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:07,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:24:07,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135965363] [2024-06-20 15:24:07,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:07,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:24:07,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:07,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:24:07,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:24:08,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:08,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 517 transitions, 6282 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:08,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:08,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:08,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:09,578 INFO L124 PetriNetUnfolderBase]: 4184/7043 cut-off events. [2024-06-20 15:24:09,578 INFO L125 PetriNetUnfolderBase]: For 857158/857170 co-relation queries the response was YES. [2024-06-20 15:24:09,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47630 conditions, 7043 events. 4184/7043 cut-off events. For 857158/857170 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49867 event pairs, 965 based on Foata normal form. 30/7072 useless extension candidates. Maximal degree in co-relation 47426. Up to 5061 conditions per place. [2024-06-20 15:24:09,680 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 422 selfloop transitions, 115 changer transitions 20/564 dead transitions. [2024-06-20 15:24:09,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 564 transitions, 7940 flow [2024-06-20 15:24:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:24:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:24:09,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 268 transitions. [2024-06-20 15:24:09,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-20 15:24:09,681 INFO L175 Difference]: Start difference. First operand has 499 places, 517 transitions, 6282 flow. Second operand 12 states and 268 transitions. [2024-06-20 15:24:09,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 564 transitions, 7940 flow [2024-06-20 15:24:14,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 564 transitions, 7699 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:24:14,774 INFO L231 Difference]: Finished difference. Result has 499 places, 512 transitions, 6198 flow [2024-06-20 15:24:14,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6045, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6198, PETRI_PLACES=499, PETRI_TRANSITIONS=512} [2024-06-20 15:24:14,774 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2024-06-20 15:24:14,775 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 512 transitions, 6198 flow [2024-06-20 15:24:14,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:14,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:14,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:14,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-20 15:24:14,775 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:14,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:14,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1578527852, now seen corresponding path program 7 times [2024-06-20 15:24:14,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:14,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792556431] [2024-06-20 15:24:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:14,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:14,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:14,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792556431] [2024-06-20 15:24:14,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792556431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:14,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:14,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:24:14,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753738598] [2024-06-20 15:24:14,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:14,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:24:14,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:14,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:24:14,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:24:14,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:15,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 512 transitions, 6198 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:15,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:15,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:15,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:16,730 INFO L124 PetriNetUnfolderBase]: 4285/7200 cut-off events. [2024-06-20 15:24:16,731 INFO L125 PetriNetUnfolderBase]: For 1132571/1132579 co-relation queries the response was YES. [2024-06-20 15:24:16,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51947 conditions, 7200 events. 4285/7200 cut-off events. For 1132571/1132579 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 51298 event pairs, 1238 based on Foata normal form. 32/7230 useless extension candidates. Maximal degree in co-relation 51744. Up to 5632 conditions per place. [2024-06-20 15:24:16,835 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 309 selfloop transitions, 223 changer transitions 19/558 dead transitions. [2024-06-20 15:24:16,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 558 transitions, 7838 flow [2024-06-20 15:24:16,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:24:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:24:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 292 transitions. [2024-06-20 15:24:16,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-20 15:24:16,836 INFO L175 Difference]: Start difference. First operand has 499 places, 512 transitions, 6198 flow. Second operand 13 states and 292 transitions. [2024-06-20 15:24:16,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 558 transitions, 7838 flow [2024-06-20 15:24:25,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 558 transitions, 7490 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-20 15:24:25,211 INFO L231 Difference]: Finished difference. Result has 493 places, 508 transitions, 6251 flow [2024-06-20 15:24:25,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5852, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6251, PETRI_PLACES=493, PETRI_TRANSITIONS=508} [2024-06-20 15:24:25,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 452 predicate places. [2024-06-20 15:24:25,211 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 508 transitions, 6251 flow [2024-06-20 15:24:25,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:25,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:25,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:25,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-20 15:24:25,212 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:25,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1468299978, now seen corresponding path program 8 times [2024-06-20 15:24:25,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:25,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683170654] [2024-06-20 15:24:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:25,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:25,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:25,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683170654] [2024-06-20 15:24:25,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683170654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:25,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:25,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:24:25,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870354545] [2024-06-20 15:24:25,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:25,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:24:25,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:25,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:24:25,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:24:25,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:25,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 508 transitions, 6251 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:25,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:25,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:25,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:27,269 INFO L124 PetriNetUnfolderBase]: 4364/7368 cut-off events. [2024-06-20 15:24:27,269 INFO L125 PetriNetUnfolderBase]: For 1445978/1445986 co-relation queries the response was YES. [2024-06-20 15:24:27,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57905 conditions, 7368 events. 4364/7368 cut-off events. For 1445978/1445986 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 52871 event pairs, 1213 based on Foata normal form. 26/7392 useless extension candidates. Maximal degree in co-relation 57704. Up to 4899 conditions per place. [2024-06-20 15:24:27,373 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 308 selfloop transitions, 227 changer transitions 16/558 dead transitions. [2024-06-20 15:24:27,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 558 transitions, 8187 flow [2024-06-20 15:24:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:24:27,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:24:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 280 transitions. [2024-06-20 15:24:27,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 15:24:27,374 INFO L175 Difference]: Start difference. First operand has 493 places, 508 transitions, 6251 flow. Second operand 12 states and 280 transitions. [2024-06-20 15:24:27,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 558 transitions, 8187 flow [2024-06-20 15:24:39,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 558 transitions, 7767 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-20 15:24:39,130 INFO L231 Difference]: Finished difference. Result has 490 places, 505 transitions, 6268 flow [2024-06-20 15:24:39,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6268, PETRI_PLACES=490, PETRI_TRANSITIONS=505} [2024-06-20 15:24:39,131 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 449 predicate places. [2024-06-20 15:24:39,131 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 505 transitions, 6268 flow [2024-06-20 15:24:39,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:39,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:39,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:39,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-20 15:24:39,132 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:39,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:39,132 INFO L85 PathProgramCache]: Analyzing trace with hash 111657814, now seen corresponding path program 9 times [2024-06-20 15:24:39,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:39,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214427165] [2024-06-20 15:24:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:39,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:39,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:39,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214427165] [2024-06-20 15:24:39,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214427165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:39,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:39,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:24:39,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348098643] [2024-06-20 15:24:39,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:39,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:24:39,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:39,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:24:39,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:24:39,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:39,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 505 transitions, 6268 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:39,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:39,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:39,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:40,914 INFO L124 PetriNetUnfolderBase]: 4293/7230 cut-off events. [2024-06-20 15:24:40,914 INFO L125 PetriNetUnfolderBase]: For 1428089/1428101 co-relation queries the response was YES. [2024-06-20 15:24:41,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57480 conditions, 7230 events. 4293/7230 cut-off events. For 1428089/1428101 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 51587 event pairs, 1220 based on Foata normal form. 30/7259 useless extension candidates. Maximal degree in co-relation 57280. Up to 5992 conditions per place. [2024-06-20 15:24:41,038 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 435 selfloop transitions, 100 changer transitions 12/554 dead transitions. [2024-06-20 15:24:41,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 554 transitions, 7902 flow [2024-06-20 15:24:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 15:24:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 15:24:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 302 transitions. [2024-06-20 15:24:41,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-20 15:24:41,040 INFO L175 Difference]: Start difference. First operand has 490 places, 505 transitions, 6268 flow. Second operand 14 states and 302 transitions. [2024-06-20 15:24:41,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 554 transitions, 7902 flow [2024-06-20 15:24:50,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 554 transitions, 7454 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:24:50,762 INFO L231 Difference]: Finished difference. Result has 490 places, 503 transitions, 6000 flow [2024-06-20 15:24:50,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5824, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6000, PETRI_PLACES=490, PETRI_TRANSITIONS=503} [2024-06-20 15:24:50,762 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 449 predicate places. [2024-06-20 15:24:50,762 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 503 transitions, 6000 flow [2024-06-20 15:24:50,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:50,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:50,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:50,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-20 15:24:50,763 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:50,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:50,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1472019048, now seen corresponding path program 10 times [2024-06-20 15:24:50,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:50,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970681074] [2024-06-20 15:24:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:50,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:50,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:50,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970681074] [2024-06-20 15:24:50,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970681074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:50,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:50,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:24:50,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374231904] [2024-06-20 15:24:50,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:50,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:24:50,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:50,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:24:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:24:51,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:24:51,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 503 transitions, 6000 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:51,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:51,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:24:51,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:52,571 INFO L124 PetriNetUnfolderBase]: 4188/7043 cut-off events. [2024-06-20 15:24:52,571 INFO L125 PetriNetUnfolderBase]: For 1250423/1250435 co-relation queries the response was YES. [2024-06-20 15:24:52,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53942 conditions, 7043 events. 4188/7043 cut-off events. For 1250423/1250435 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 49985 event pairs, 1208 based on Foata normal form. 30/7072 useless extension candidates. Maximal degree in co-relation 53743. Up to 5992 conditions per place. [2024-06-20 15:24:52,679 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 419 selfloop transitions, 96 changer transitions 19/541 dead transitions. [2024-06-20 15:24:52,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 541 transitions, 7256 flow [2024-06-20 15:24:52,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:24:52,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:24:52,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-20 15:24:52,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-20 15:24:52,680 INFO L175 Difference]: Start difference. First operand has 490 places, 503 transitions, 6000 flow. Second operand 12 states and 261 transitions. [2024-06-20 15:24:52,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 541 transitions, 7256 flow [2024-06-20 15:25:02,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 541 transitions, 7026 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-20 15:25:02,564 INFO L231 Difference]: Finished difference. Result has 487 places, 499 transitions, 5920 flow [2024-06-20 15:25:02,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5770, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5920, PETRI_PLACES=487, PETRI_TRANSITIONS=499} [2024-06-20 15:25:02,565 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 446 predicate places. [2024-06-20 15:25:02,565 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 499 transitions, 5920 flow [2024-06-20 15:25:02,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:02,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:02,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:02,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-20 15:25:02,566 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:02,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:02,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1844551562, now seen corresponding path program 11 times [2024-06-20 15:25:02,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:02,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257330033] [2024-06-20 15:25:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:02,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:02,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:02,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257330033] [2024-06-20 15:25:02,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257330033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:02,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:02,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:25:02,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383828878] [2024-06-20 15:25:02,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:02,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:25:02,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:02,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:25:02,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:25:02,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:02,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 499 transitions, 5920 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:02,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:02,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:02,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:04,306 INFO L124 PetriNetUnfolderBase]: 4180/7034 cut-off events. [2024-06-20 15:25:04,306 INFO L125 PetriNetUnfolderBase]: For 1317553/1317561 co-relation queries the response was YES. [2024-06-20 15:25:04,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53935 conditions, 7034 events. 4180/7034 cut-off events. For 1317553/1317561 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 50069 event pairs, 1319 based on Foata normal form. 34/7066 useless extension candidates. Maximal degree in co-relation 53736. Up to 6058 conditions per place. [2024-06-20 15:25:04,411 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 293 selfloop transitions, 219 changer transitions 12/531 dead transitions. [2024-06-20 15:25:04,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 531 transitions, 7104 flow [2024-06-20 15:25:04,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:25:04,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:25:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 281 transitions. [2024-06-20 15:25:04,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403846153846154 [2024-06-20 15:25:04,412 INFO L175 Difference]: Start difference. First operand has 487 places, 499 transitions, 5920 flow. Second operand 13 states and 281 transitions. [2024-06-20 15:25:04,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 531 transitions, 7104 flow [2024-06-20 15:25:14,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 531 transitions, 6906 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-20 15:25:14,314 INFO L231 Difference]: Finished difference. Result has 482 places, 495 transitions, 6137 flow [2024-06-20 15:25:14,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5722, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6137, PETRI_PLACES=482, PETRI_TRANSITIONS=495} [2024-06-20 15:25:14,315 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 441 predicate places. [2024-06-20 15:25:14,315 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 495 transitions, 6137 flow [2024-06-20 15:25:14,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:14,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:14,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:14,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-20 15:25:14,316 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:14,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:14,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1844225132, now seen corresponding path program 12 times [2024-06-20 15:25:14,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:14,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176458771] [2024-06-20 15:25:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:14,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:14,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:14,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176458771] [2024-06-20 15:25:14,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176458771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:14,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:14,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:25:14,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433208912] [2024-06-20 15:25:14,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:14,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:25:14,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:14,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:25:14,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:25:14,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:14,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 495 transitions, 6137 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:14,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:14,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:14,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:16,119 INFO L124 PetriNetUnfolderBase]: 4165/7023 cut-off events. [2024-06-20 15:25:16,120 INFO L125 PetriNetUnfolderBase]: For 1280538/1280546 co-relation queries the response was YES. [2024-06-20 15:25:16,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53825 conditions, 7023 events. 4165/7023 cut-off events. For 1280538/1280546 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 50132 event pairs, 1281 based on Foata normal form. 32/7053 useless extension candidates. Maximal degree in co-relation 53628. Up to 6010 conditions per place. [2024-06-20 15:25:16,227 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 215 changer transitions 21/531 dead transitions. [2024-06-20 15:25:16,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 531 transitions, 7369 flow [2024-06-20 15:25:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:25:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:25:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2024-06-20 15:25:16,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423076923076923 [2024-06-20 15:25:16,229 INFO L175 Difference]: Start difference. First operand has 482 places, 495 transitions, 6137 flow. Second operand 13 states and 282 transitions. [2024-06-20 15:25:16,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 531 transitions, 7369 flow [2024-06-20 15:25:27,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 531 transitions, 6927 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-20 15:25:27,249 INFO L231 Difference]: Finished difference. Result has 480 places, 490 transitions, 6074 flow [2024-06-20 15:25:27,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5695, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6074, PETRI_PLACES=480, PETRI_TRANSITIONS=490} [2024-06-20 15:25:27,249 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-20 15:25:27,250 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 490 transitions, 6074 flow [2024-06-20 15:25:27,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:27,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:27,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:27,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-20 15:25:27,250 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:27,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:27,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1123284106, now seen corresponding path program 13 times [2024-06-20 15:25:27,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:27,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863950512] [2024-06-20 15:25:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:27,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:27,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:27,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863950512] [2024-06-20 15:25:27,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863950512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:27,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:27,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:25:27,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623625957] [2024-06-20 15:25:27,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:27,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:25:27,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:27,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:25:27,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:25:27,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:27,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 490 transitions, 6074 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:27,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:27,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:27,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:29,067 INFO L124 PetriNetUnfolderBase]: 4255/7152 cut-off events. [2024-06-20 15:25:29,067 INFO L125 PetriNetUnfolderBase]: For 1483734/1483746 co-relation queries the response was YES. [2024-06-20 15:25:29,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57886 conditions, 7152 events. 4255/7152 cut-off events. For 1483734/1483746 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 51031 event pairs, 1327 based on Foata normal form. 36/7187 useless extension candidates. Maximal degree in co-relation 57690. Up to 6136 conditions per place. [2024-06-20 15:25:29,170 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 419 selfloop transitions, 90 changer transitions 10/526 dead transitions. [2024-06-20 15:25:29,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 526 transitions, 7578 flow [2024-06-20 15:25:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:25:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:25:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 279 transitions. [2024-06-20 15:25:29,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365384615384615 [2024-06-20 15:25:29,171 INFO L175 Difference]: Start difference. First operand has 480 places, 490 transitions, 6074 flow. Second operand 13 states and 279 transitions. [2024-06-20 15:25:29,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 526 transitions, 7578 flow [2024-06-20 15:25:39,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 526 transitions, 7132 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-20 15:25:39,024 INFO L231 Difference]: Finished difference. Result has 475 places, 487 transitions, 5766 flow [2024-06-20 15:25:39,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5766, PETRI_PLACES=475, PETRI_TRANSITIONS=487} [2024-06-20 15:25:39,025 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-20 15:25:39,025 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 487 transitions, 5766 flow [2024-06-20 15:25:39,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:39,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:39,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:39,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-20 15:25:39,026 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:39,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:39,026 INFO L85 PathProgramCache]: Analyzing trace with hash -402637474, now seen corresponding path program 14 times [2024-06-20 15:25:39,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:39,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615157911] [2024-06-20 15:25:39,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:39,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:39,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:39,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615157911] [2024-06-20 15:25:39,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615157911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:39,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:39,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:25:39,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526193428] [2024-06-20 15:25:39,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:39,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:25:39,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:39,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:25:39,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:25:39,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:39,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 487 transitions, 5766 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:39,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:39,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:39,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:40,993 INFO L124 PetriNetUnfolderBase]: 4398/7411 cut-off events. [2024-06-20 15:25:40,993 INFO L125 PetriNetUnfolderBase]: For 1739003/1739015 co-relation queries the response was YES. [2024-06-20 15:25:41,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63800 conditions, 7411 events. 4398/7411 cut-off events. For 1739003/1739015 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 53375 event pairs, 1417 based on Foata normal form. 30/7440 useless extension candidates. Maximal degree in co-relation 63606. Up to 6010 conditions per place. [2024-06-20 15:25:41,106 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 423 selfloop transitions, 91 changer transitions 8/529 dead transitions. [2024-06-20 15:25:41,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 529 transitions, 7560 flow [2024-06-20 15:25:41,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 15:25:41,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 15:25:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 301 transitions. [2024-06-20 15:25:41,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-20 15:25:41,107 INFO L175 Difference]: Start difference. First operand has 475 places, 487 transitions, 5766 flow. Second operand 14 states and 301 transitions. [2024-06-20 15:25:41,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 529 transitions, 7560 flow [2024-06-20 15:25:49,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 529 transitions, 7372 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-20 15:25:49,074 INFO L231 Difference]: Finished difference. Result has 475 places, 485 transitions, 5737 flow [2024-06-20 15:25:49,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5582, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5737, PETRI_PLACES=475, PETRI_TRANSITIONS=485} [2024-06-20 15:25:49,074 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-20 15:25:49,075 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 485 transitions, 5737 flow [2024-06-20 15:25:49,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:49,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:49,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:49,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-20 15:25:49,075 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:49,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:49,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1123610536, now seen corresponding path program 15 times [2024-06-20 15:25:49,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:49,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434095436] [2024-06-20 15:25:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:49,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:49,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:49,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434095436] [2024-06-20 15:25:49,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434095436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:49,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:49,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:25:49,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246002988] [2024-06-20 15:25:49,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:49,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:25:49,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:49,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:25:49,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:25:49,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:49,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 485 transitions, 5737 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:49,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:49,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:49,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:51,190 INFO L124 PetriNetUnfolderBase]: 4402/7421 cut-off events. [2024-06-20 15:25:51,190 INFO L125 PetriNetUnfolderBase]: For 1806480/1806492 co-relation queries the response was YES. [2024-06-20 15:25:51,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63892 conditions, 7421 events. 4402/7421 cut-off events. For 1806480/1806492 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 53514 event pairs, 1526 based on Foata normal form. 38/7458 useless extension candidates. Maximal degree in co-relation 63698. Up to 6632 conditions per place. [2024-06-20 15:25:51,311 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 408 selfloop transitions, 86 changer transitions 13/514 dead transitions. [2024-06-20 15:25:51,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 514 transitions, 6879 flow [2024-06-20 15:25:51,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:25:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:25:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-20 15:25:51,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269230769230769 [2024-06-20 15:25:51,312 INFO L175 Difference]: Start difference. First operand has 475 places, 485 transitions, 5737 flow. Second operand 13 states and 274 transitions. [2024-06-20 15:25:51,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 514 transitions, 6879 flow [2024-06-20 15:25:59,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 514 transitions, 6694 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-20 15:25:59,698 INFO L231 Difference]: Finished difference. Result has 474 places, 480 transitions, 5671 flow [2024-06-20 15:25:59,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5552, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5671, PETRI_PLACES=474, PETRI_TRANSITIONS=480} [2024-06-20 15:25:59,698 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 433 predicate places. [2024-06-20 15:25:59,698 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 480 transitions, 5671 flow [2024-06-20 15:25:59,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:59,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:59,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:59,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-20 15:25:59,701 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:59,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:59,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1118700136, now seen corresponding path program 16 times [2024-06-20 15:25:59,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:59,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020561549] [2024-06-20 15:25:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:59,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:59,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:59,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020561549] [2024-06-20 15:25:59,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020561549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:59,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:59,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:25:59,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332055471] [2024-06-20 15:25:59,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:59,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:25:59,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:59,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:25:59,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:25:59,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:25:59,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 480 transitions, 5671 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:59,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:59,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:25:59,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:01,499 INFO L124 PetriNetUnfolderBase]: 4285/7214 cut-off events. [2024-06-20 15:26:01,499 INFO L125 PetriNetUnfolderBase]: For 1588738/1588750 co-relation queries the response was YES. [2024-06-20 15:26:01,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60474 conditions, 7214 events. 4285/7214 cut-off events. For 1588738/1588750 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 51596 event pairs, 1327 based on Foata normal form. 30/7243 useless extension candidates. Maximal degree in co-relation 60280. Up to 6010 conditions per place. [2024-06-20 15:26:01,817 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 421 selfloop transitions, 86 changer transitions 9/523 dead transitions. [2024-06-20 15:26:01,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 523 transitions, 7477 flow [2024-06-20 15:26:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 15:26:01,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 15:26:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 299 transitions. [2024-06-20 15:26:01,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5339285714285714 [2024-06-20 15:26:01,818 INFO L175 Difference]: Start difference. First operand has 474 places, 480 transitions, 5671 flow. Second operand 14 states and 299 transitions. [2024-06-20 15:26:01,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 523 transitions, 7477 flow [2024-06-20 15:26:13,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 523 transitions, 7293 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-20 15:26:13,282 INFO L231 Difference]: Finished difference. Result has 472 places, 477 transitions, 5626 flow [2024-06-20 15:26:13,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5491, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5626, PETRI_PLACES=472, PETRI_TRANSITIONS=477} [2024-06-20 15:26:13,282 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 431 predicate places. [2024-06-20 15:26:13,282 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 477 transitions, 5626 flow [2024-06-20 15:26:13,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:13,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:13,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:13,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-20 15:26:13,283 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:13,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:13,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1128825046, now seen corresponding path program 17 times [2024-06-20 15:26:13,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:13,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514749911] [2024-06-20 15:26:13,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:13,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:13,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:13,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514749911] [2024-06-20 15:26:13,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514749911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:13,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:13,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:26:13,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914206941] [2024-06-20 15:26:13,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:13,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:26:13,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:13,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:26:13,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:26:13,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:13,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 477 transitions, 5626 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:13,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:13,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:13,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:15,040 INFO L124 PetriNetUnfolderBase]: 4165/7014 cut-off events. [2024-06-20 15:26:15,040 INFO L125 PetriNetUnfolderBase]: For 1439546/1439558 co-relation queries the response was YES. [2024-06-20 15:26:15,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56401 conditions, 7014 events. 4165/7014 cut-off events. For 1439546/1439558 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 49938 event pairs, 1321 based on Foata normal form. 36/7049 useless extension candidates. Maximal degree in co-relation 56208. Up to 6010 conditions per place. [2024-06-20 15:26:15,340 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 413 selfloop transitions, 83 changer transitions 10/513 dead transitions. [2024-06-20 15:26:15,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 513 transitions, 7100 flow [2024-06-20 15:26:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:26:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:26:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 276 transitions. [2024-06-20 15:26:15,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2024-06-20 15:26:15,341 INFO L175 Difference]: Start difference. First operand has 472 places, 477 transitions, 5626 flow. Second operand 13 states and 276 transitions. [2024-06-20 15:26:15,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 513 transitions, 7100 flow [2024-06-20 15:26:24,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 513 transitions, 6921 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-20 15:26:24,779 INFO L231 Difference]: Finished difference. Result has 468 places, 474 transitions, 5571 flow [2024-06-20 15:26:24,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5449, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5571, PETRI_PLACES=468, PETRI_TRANSITIONS=474} [2024-06-20 15:26:24,780 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 427 predicate places. [2024-06-20 15:26:24,780 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 474 transitions, 5571 flow [2024-06-20 15:26:24,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:24,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:24,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:24,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2024-06-20 15:26:24,781 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:24,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:24,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1128972916, now seen corresponding path program 18 times [2024-06-20 15:26:24,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:24,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106971584] [2024-06-20 15:26:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:24,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:24,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:24,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106971584] [2024-06-20 15:26:24,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106971584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:24,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:24,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:26:24,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293350830] [2024-06-20 15:26:24,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:24,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:26:24,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:24,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:26:24,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:26:25,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:25,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 474 transitions, 5571 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:25,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:25,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:25,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:26,483 INFO L124 PetriNetUnfolderBase]: 4014/6745 cut-off events. [2024-06-20 15:26:26,484 INFO L125 PetriNetUnfolderBase]: For 1243851/1243863 co-relation queries the response was YES. [2024-06-20 15:26:26,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51564 conditions, 6745 events. 4014/6745 cut-off events. For 1243851/1243863 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 47598 event pairs, 1266 based on Foata normal form. 38/6782 useless extension candidates. Maximal degree in co-relation 51372. Up to 6010 conditions per place. [2024-06-20 15:26:26,592 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 399 selfloop transitions, 76 changer transitions 20/502 dead transitions. [2024-06-20 15:26:26,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 502 transitions, 6687 flow [2024-06-20 15:26:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:26:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:26:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-20 15:26:26,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2024-06-20 15:26:26,593 INFO L175 Difference]: Start difference. First operand has 468 places, 474 transitions, 5571 flow. Second operand 12 states and 251 transitions. [2024-06-20 15:26:26,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 502 transitions, 6687 flow [2024-06-20 15:26:34,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 502 transitions, 6464 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-20 15:26:34,189 INFO L231 Difference]: Finished difference. Result has 465 places, 467 transitions, 5424 flow [2024-06-20 15:26:34,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5348, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5424, PETRI_PLACES=465, PETRI_TRANSITIONS=467} [2024-06-20 15:26:34,190 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 424 predicate places. [2024-06-20 15:26:34,190 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 467 transitions, 5424 flow [2024-06-20 15:26:34,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:34,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:34,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:34,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2024-06-20 15:26:34,191 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:34,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:34,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1085791638, now seen corresponding path program 19 times [2024-06-20 15:26:34,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:34,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016625097] [2024-06-20 15:26:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:34,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:34,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:34,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016625097] [2024-06-20 15:26:34,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016625097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:34,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:34,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:26:34,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329604488] [2024-06-20 15:26:34,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:34,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:26:34,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:34,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:26:34,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:26:34,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:34,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 467 transitions, 5424 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:34,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:34,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:34,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:36,266 INFO L124 PetriNetUnfolderBase]: 4845/8197 cut-off events. [2024-06-20 15:26:36,266 INFO L125 PetriNetUnfolderBase]: For 2687665/2687676 co-relation queries the response was YES. [2024-06-20 15:26:36,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82267 conditions, 8197 events. 4845/8197 cut-off events. For 2687665/2687676 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 60346 event pairs, 1614 based on Foata normal form. 29/8225 useless extension candidates. Maximal degree in co-relation 82076. Up to 5317 conditions per place. [2024-06-20 15:26:36,408 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 389 selfloop transitions, 100 changer transitions 13/509 dead transitions. [2024-06-20 15:26:36,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 509 transitions, 7220 flow [2024-06-20 15:26:36,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:26:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:26:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 285 transitions. [2024-06-20 15:26:36,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-06-20 15:26:36,409 INFO L175 Difference]: Start difference. First operand has 465 places, 467 transitions, 5424 flow. Second operand 13 states and 285 transitions. [2024-06-20 15:26:36,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 509 transitions, 7220 flow [2024-06-20 15:26:48,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 509 transitions, 7038 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 15:26:48,234 INFO L231 Difference]: Finished difference. Result has 458 places, 464 transitions, 5397 flow [2024-06-20 15:26:48,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5246, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5397, PETRI_PLACES=458, PETRI_TRANSITIONS=464} [2024-06-20 15:26:48,235 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 417 predicate places. [2024-06-20 15:26:48,235 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 464 transitions, 5397 flow [2024-06-20 15:26:48,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:48,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:48,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:48,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2024-06-20 15:26:48,236 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:48,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:48,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1292052726, now seen corresponding path program 20 times [2024-06-20 15:26:48,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:48,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855964262] [2024-06-20 15:26:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:48,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:48,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:48,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855964262] [2024-06-20 15:26:48,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855964262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:48,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:48,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:26:48,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714552345] [2024-06-20 15:26:48,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:48,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:26:48,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:26:48,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:26:48,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:26:48,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 464 transitions, 5397 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:48,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:48,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:26:48,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:50,576 INFO L124 PetriNetUnfolderBase]: 4801/8115 cut-off events. [2024-06-20 15:26:50,576 INFO L125 PetriNetUnfolderBase]: For 2689132/2689143 co-relation queries the response was YES. [2024-06-20 15:26:50,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81914 conditions, 8115 events. 4801/8115 cut-off events. For 2689132/2689143 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 59483 event pairs, 1701 based on Foata normal form. 29/8143 useless extension candidates. Maximal degree in co-relation 81724. Up to 5317 conditions per place. [2024-06-20 15:26:50,706 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 396 selfloop transitions, 96 changer transitions 8/507 dead transitions. [2024-06-20 15:26:50,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 507 transitions, 7213 flow [2024-06-20 15:26:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:26:50,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:26:50,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 286 transitions. [2024-06-20 15:26:50,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 15:26:50,707 INFO L175 Difference]: Start difference. First operand has 458 places, 464 transitions, 5397 flow. Second operand 13 states and 286 transitions. [2024-06-20 15:26:50,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 507 transitions, 7213 flow [2024-06-20 15:27:01,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 507 transitions, 7011 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 15:27:01,585 INFO L231 Difference]: Finished difference. Result has 456 places, 462 transitions, 5370 flow [2024-06-20 15:27:01,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5370, PETRI_PLACES=456, PETRI_TRANSITIONS=462} [2024-06-20 15:27:01,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-20 15:27:01,585 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 462 transitions, 5370 flow [2024-06-20 15:27:01,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:01,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:01,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:01,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2024-06-20 15:27:01,586 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:01,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:01,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2142567214, now seen corresponding path program 21 times [2024-06-20 15:27:01,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:01,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660038183] [2024-06-20 15:27:01,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:01,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:01,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:01,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660038183] [2024-06-20 15:27:01,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660038183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:01,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:01,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:27:01,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543669173] [2024-06-20 15:27:01,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:01,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:27:01,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:01,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:27:01,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:27:01,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:27:01,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 462 transitions, 5370 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:01,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:01,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:27:01,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:03,857 INFO L124 PetriNetUnfolderBase]: 4683/7919 cut-off events. [2024-06-20 15:27:03,858 INFO L125 PetriNetUnfolderBase]: For 2538907/2538918 co-relation queries the response was YES. [2024-06-20 15:27:03,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77887 conditions, 7919 events. 4683/7919 cut-off events. For 2538907/2538918 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 58041 event pairs, 1772 based on Foata normal form. 35/7953 useless extension candidates. Maximal degree in co-relation 77698. Up to 6852 conditions per place. [2024-06-20 15:27:03,979 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 387 selfloop transitions, 92 changer transitions 10/496 dead transitions. [2024-06-20 15:27:03,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 496 transitions, 6804 flow [2024-06-20 15:27:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 15:27:03,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 15:27:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 296 transitions. [2024-06-20 15:27:03,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-20 15:27:03,981 INFO L175 Difference]: Start difference. First operand has 456 places, 462 transitions, 5370 flow. Second operand 14 states and 296 transitions. [2024-06-20 15:27:03,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 496 transitions, 6804 flow [2024-06-20 15:27:14,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 496 transitions, 6608 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-20 15:27:14,480 INFO L231 Difference]: Finished difference. Result has 456 places, 459 transitions, 5316 flow [2024-06-20 15:27:14,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5176, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5316, PETRI_PLACES=456, PETRI_TRANSITIONS=459} [2024-06-20 15:27:14,481 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-20 15:27:14,481 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 459 transitions, 5316 flow [2024-06-20 15:27:14,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:14,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:14,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:14,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2024-06-20 15:27:14,482 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:14,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:14,483 INFO L85 PathProgramCache]: Analyzing trace with hash -470994328, now seen corresponding path program 22 times [2024-06-20 15:27:14,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:14,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646060487] [2024-06-20 15:27:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:14,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:14,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:14,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646060487] [2024-06-20 15:27:14,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646060487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:14,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:14,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:27:14,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145817948] [2024-06-20 15:27:14,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:14,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:27:14,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:14,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:27:14,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:27:14,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:27:14,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 459 transitions, 5316 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:14,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:14,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:27:14,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:16,715 INFO L124 PetriNetUnfolderBase]: 4504/7630 cut-off events. [2024-06-20 15:27:16,715 INFO L125 PetriNetUnfolderBase]: For 2271572/2271583 co-relation queries the response was YES. [2024-06-20 15:27:16,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72778 conditions, 7630 events. 4504/7630 cut-off events. For 2271572/2271583 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 55489 event pairs, 1550 based on Foata normal form. 29/7658 useless extension candidates. Maximal degree in co-relation 72590. Up to 6152 conditions per place. [2024-06-20 15:27:16,915 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 390 selfloop transitions, 95 changer transitions 8/500 dead transitions. [2024-06-20 15:27:16,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 500 transitions, 7070 flow [2024-06-20 15:27:16,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-20 15:27:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-20 15:27:16,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 319 transitions. [2024-06-20 15:27:16,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5316666666666666 [2024-06-20 15:27:16,916 INFO L175 Difference]: Start difference. First operand has 456 places, 459 transitions, 5316 flow. Second operand 15 states and 319 transitions. [2024-06-20 15:27:16,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 500 transitions, 7070 flow [2024-06-20 15:27:27,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 500 transitions, 6878 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-20 15:27:27,827 INFO L231 Difference]: Finished difference. Result has 456 places, 457 transitions, 5298 flow [2024-06-20 15:27:27,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5128, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5298, PETRI_PLACES=456, PETRI_TRANSITIONS=457} [2024-06-20 15:27:27,830 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-20 15:27:27,830 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 457 transitions, 5298 flow [2024-06-20 15:27:27,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:27,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:27,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:27,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2024-06-20 15:27:27,831 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:27,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:27,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1985868360, now seen corresponding path program 23 times [2024-06-20 15:27:27,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:27,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331557520] [2024-06-20 15:27:27,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:27,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:28,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:28,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331557520] [2024-06-20 15:27:28,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331557520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:28,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:28,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:27:28,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42983946] [2024-06-20 15:27:28,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:28,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:27:28,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:28,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:27:28,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:27:28,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:27:28,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 457 transitions, 5298 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:28,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:28,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:27:28,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:30,195 INFO L124 PetriNetUnfolderBase]: 4627/7831 cut-off events. [2024-06-20 15:27:30,195 INFO L125 PetriNetUnfolderBase]: For 2537668/2537679 co-relation queries the response was YES. [2024-06-20 15:27:30,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77362 conditions, 7831 events. 4627/7831 cut-off events. For 2537668/2537679 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 57321 event pairs, 1762 based on Foata normal form. 35/7865 useless extension candidates. Maximal degree in co-relation 77174. Up to 6780 conditions per place. [2024-06-20 15:27:30,325 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 383 selfloop transitions, 91 changer transitions 10/491 dead transitions. [2024-06-20 15:27:30,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 491 transitions, 6722 flow [2024-06-20 15:27:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 15:27:30,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 15:27:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 294 transitions. [2024-06-20 15:27:30,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-20 15:27:30,327 INFO L175 Difference]: Start difference. First operand has 456 places, 457 transitions, 5298 flow. Second operand 14 states and 294 transitions. [2024-06-20 15:27:30,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 491 transitions, 6722 flow [2024-06-20 15:27:41,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 491 transitions, 6529 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-20 15:27:41,557 INFO L231 Difference]: Finished difference. Result has 455 places, 454 transitions, 5246 flow [2024-06-20 15:27:41,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5107, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5246, PETRI_PLACES=455, PETRI_TRANSITIONS=454} [2024-06-20 15:27:41,557 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-20 15:27:41,557 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 454 transitions, 5246 flow [2024-06-20 15:27:41,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:41,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:41,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:41,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2024-06-20 15:27:41,558 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:41,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:41,559 INFO L85 PathProgramCache]: Analyzing trace with hash -470988748, now seen corresponding path program 24 times [2024-06-20 15:27:41,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:41,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773258008] [2024-06-20 15:27:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:41,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:41,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:41,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773258008] [2024-06-20 15:27:41,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773258008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:41,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:41,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:27:41,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131533183] [2024-06-20 15:27:41,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:41,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:27:41,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:41,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:27:41,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:27:41,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:27:41,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 454 transitions, 5246 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:41,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:41,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:27:41,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:43,805 INFO L124 PetriNetUnfolderBase]: 4494/7590 cut-off events. [2024-06-20 15:27:43,805 INFO L125 PetriNetUnfolderBase]: For 2342507/2342518 co-relation queries the response was YES. [2024-06-20 15:27:43,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73754 conditions, 7590 events. 4494/7590 cut-off events. For 2342507/2342518 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 54982 event pairs, 1677 based on Foata normal form. 29/7618 useless extension candidates. Maximal degree in co-relation 73566. Up to 6152 conditions per place. [2024-06-20 15:27:43,919 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 382 selfloop transitions, 89 changer transitions 13/491 dead transitions. [2024-06-20 15:27:43,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 491 transitions, 6676 flow [2024-06-20 15:27:43,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-20 15:27:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-20 15:27:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 315 transitions. [2024-06-20 15:27:43,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-20 15:27:43,920 INFO L175 Difference]: Start difference. First operand has 455 places, 454 transitions, 5246 flow. Second operand 15 states and 315 transitions. [2024-06-20 15:27:43,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 491 transitions, 6676 flow [2024-06-20 15:27:54,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 491 transitions, 6491 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-20 15:27:54,185 INFO L231 Difference]: Finished difference. Result has 456 places, 451 transitions, 5199 flow [2024-06-20 15:27:54,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5063, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5199, PETRI_PLACES=456, PETRI_TRANSITIONS=451} [2024-06-20 15:27:54,185 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-20 15:27:54,186 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 451 transitions, 5199 flow [2024-06-20 15:27:54,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:54,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:54,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:54,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2024-06-20 15:27:54,186 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:27:54,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:54,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1985720490, now seen corresponding path program 25 times [2024-06-20 15:27:54,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:54,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299812680] [2024-06-20 15:27:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:54,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:54,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:54,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299812680] [2024-06-20 15:27:54,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299812680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:54,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:54,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:27:54,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293329818] [2024-06-20 15:27:54,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:54,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:27:54,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:54,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:27:54,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:27:54,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 15:27:54,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 451 transitions, 5199 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:54,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:54,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 15:27:54,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:56,325 INFO L124 PetriNetUnfolderBase]: 4369/7381 cut-off events. [2024-06-20 15:27:56,325 INFO L125 PetriNetUnfolderBase]: For 2193652/2193663 co-relation queries the response was YES. [2024-06-20 15:27:56,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69286 conditions, 7381 events. 4369/7381 cut-off events. For 2193652/2193663 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 53355 event pairs, 1636 based on Foata normal form. 37/7417 useless extension candidates. Maximal degree in co-relation 69098. Up to 6603 conditions per place. [2024-06-20 15:27:56,456 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 371 selfloop transitions, 85 changer transitions 14/477 dead transitions. [2024-06-20 15:27:56,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 477 transitions, 6259 flow [2024-06-20 15:27:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:27:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:27:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 269 transitions. [2024-06-20 15:27:56,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173076923076924 [2024-06-20 15:27:56,458 INFO L175 Difference]: Start difference. First operand has 456 places, 451 transitions, 5199 flow. Second operand 13 states and 269 transitions. [2024-06-20 15:27:56,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 477 transitions, 6259 flow Killed by 15