./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_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/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe014_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-bcb38a6-m [2024-06-03 18:44:30,805 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 18:44:30,890 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 18:44:30,896 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 18:44:30,896 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 18:44:30,926 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 18:44:30,928 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 18:44:30,928 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 18:44:30,929 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 18:44:30,933 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 18:44:30,933 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 18:44:30,933 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 18:44:30,935 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 18:44:30,936 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 18:44:30,936 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 18:44:30,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 18:44:30,937 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 18:44:30,937 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 18:44:30,937 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 18:44:30,938 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 18:44:30,938 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 18:44:30,938 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 18:44:30,939 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 18:44:30,939 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 18:44:30,939 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 18:44:30,939 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 18:44:30,940 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 18:44:30,940 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 18:44:30,941 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 18:44:30,941 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 18:44:30,942 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 18:44:30,942 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 18:44:30,942 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:44:30,943 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 18:44:30,943 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 18:44:30,943 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 18:44:30,943 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 18:44:30,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 18:44:30,944 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 18:44:30,944 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 18:44:30,944 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 18:44:30,944 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 18:44:30,945 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 18:44:30,945 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 18:44:31,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 18:44:31,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 18:44:31,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 18:44:31,248 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 18:44:31,249 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 18:44:31,250 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-03 18:44:31,394 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 18:44:31,394 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 18:44:31,395 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 18:44:32,517 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 18:44:32,799 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 18:44:32,799 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 18:44:32,817 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f434f36a/2fd2528b7b9045aabc257cd5f93c3ddf/FLAGa0227fe4e [2024-06-03 18:44:32,830 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f434f36a/2fd2528b7b9045aabc257cd5f93c3ddf [2024-06-03 18:44:32,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 18:44:32,833 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 18:44:32,836 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 18:44:32,837 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 18:44:32,841 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 18:44:32,842 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:44:31" (1/2) ... [2024-06-03 18:44:32,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63249ba5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:44:32, skipping insertion in model container [2024-06-03 18:44:32,843 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:44:31" (1/2) ... [2024-06-03 18:44:32,846 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@219297aa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:44:32, skipping insertion in model container [2024-06-03 18:44:32,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:44:32" (2/2) ... [2024-06-03 18:44:32,846 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63249ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:32, skipping insertion in model container [2024-06-03 18:44:32,847 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:44:32" (2/2) ... [2024-06-03 18:44:32,848 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 18:44:32,897 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 18:44:32,899 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) [2024-06-03 18:44:32,899 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) [2024-06-03 18:44:32,899 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) [2024-06-03 18:44:32,900 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 18:44:32,900 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-03 18:44:32,949 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 18:44:33,306 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:44:33,317 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 18:44:33,450 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:44:33,483 INFO L206 MainTranslator]: Completed translation [2024-06-03 18:44:33,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:33 WrapperNode [2024-06-03 18:44:33,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 18:44:33,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 18:44:33,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 18:44:33,485 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 18:44:33,492 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:33" (1/1) ... [2024-06-03 18:44:33,505 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:33" (1/1) ... [2024-06-03 18:44:33,527 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-03 18:44:33,527 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 18:44:33,528 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 18:44:33,528 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 18:44:33,528 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 18:44:33,537 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:33" (1/1) ... [2024-06-03 18:44:33,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:33" (1/1) ... [2024-06-03 18:44:33,541 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:33" (1/1) ... [2024-06-03 18:44:33,553 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]. [2024-06-03 18:44:33,559 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:33" (1/1) ... [2024-06-03 18:44:33,559 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:33" (1/1) ... [2024-06-03 18:44:33,564 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:33" (1/1) ... [2024-06-03 18:44:33,572 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:33" (1/1) ... [2024-06-03 18:44:33,573 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:33" (1/1) ... [2024-06-03 18:44:33,579 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:33" (1/1) ... [2024-06-03 18:44:33,582 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 18:44:33,583 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 18:44:33,583 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 18:44:33,583 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 18:44:33,584 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:33" (1/1) ... [2024-06-03 18:44:33,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:44:33,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 18:44:33,615 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) [2024-06-03 18:44:33,617 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 [2024-06-03 18:44:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 18:44:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 18:44:33,645 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 18:44:33,645 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 18:44:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 18:44:33,646 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 18:44:33,646 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 18:44:33,646 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 18:44:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 18:44:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 18:44:33,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 18:44:33,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 18:44:33,648 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 18:44:33,754 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 18:44:33,756 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 18:44:33,957 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 18:44:33,957 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 18:44:34,050 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 18:44:34,052 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 18:44:34,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:44:34 BoogieIcfgContainer [2024-06-03 18:44:34,056 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 18:44:34,058 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 18:44:34,058 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 18:44:34,061 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 18:44:34,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:44:31" (1/4) ... [2024-06-03 18:44:34,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8cee60 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:44:34, skipping insertion in model container [2024-06-03 18:44:34,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 06:44:32" (2/4) ... [2024-06-03 18:44:34,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8cee60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 06:44:34, skipping insertion in model container [2024-06-03 18:44:34,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:44:33" (3/4) ... [2024-06-03 18:44:34,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8cee60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 06:44:34, skipping insertion in model container [2024-06-03 18:44:34,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:44:34" (4/4) ... [2024-06-03 18:44:34,063 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 18:44:34,081 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 18:44:34,081 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 18:44:34,081 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 18:44:34,146 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 18:44:34,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 18:44:34,215 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-03 18:44:34,215 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:44:34,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 18:44:34,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 18:44:34,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-03 18:44:34,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 18:44:34,236 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;@325508f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 18:44:34,236 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 18:44:34,240 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 18:44:34,240 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 18:44:34,240 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:44:34,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:34,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 18:44:34,241 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)] === [2024-06-03 18:44:34,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:34,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1782945868, now seen corresponding path program 1 times [2024-06-03 18:44:34,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:34,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926977654] [2024-06-03 18:44:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:34,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:34,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926977654] [2024-06-03 18:44:34,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926977654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:34,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:34,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 18:44:34,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550967980] [2024-06-03 18:44:34,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:34,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 18:44:34,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:34,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 18:44:34,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 18:44:34,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-03 18:44:34,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:34,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:34,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-03 18:44:34,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:35,165 INFO L124 PetriNetUnfolderBase]: 430/730 cut-off events. [2024-06-03 18:44:35,165 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-03 18:44:35,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 730 events. 430/730 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3710 event pairs, 241 based on Foata normal form. 1/693 useless extension candidates. Maximal degree in co-relation 1440. Up to 672 conditions per place. [2024-06-03 18:44:35,182 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 29 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-03 18:44:35,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 165 flow [2024-06-03 18:44:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 18:44:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 18:44:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-03 18:44:35,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-03 18:44:35,199 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 84 transitions. [2024-06-03 18:44:35,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 165 flow [2024-06-03 18:44:35,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 18:44:35,208 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-03 18:44:35,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-03 18:44:35,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-03 18:44:35,216 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-03 18:44:35,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:35,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:35,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:35,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 18:44:35,217 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)] === [2024-06-03 18:44:35,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:35,219 INFO L85 PathProgramCache]: Analyzing trace with hash -116908628, now seen corresponding path program 1 times [2024-06-03 18:44:35,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:35,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742235693] [2024-06-03 18:44:35,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:35,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:35,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:35,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742235693] [2024-06-03 18:44:35,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742235693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:35,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:35,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:35,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112982176] [2024-06-03 18:44:35,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:35,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:35,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:35,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:35,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:35,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:44:35,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:35,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:35,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:44:35,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:35,803 INFO L124 PetriNetUnfolderBase]: 755/1248 cut-off events. [2024-06-03 18:44:35,804 INFO L125 PetriNetUnfolderBase]: For 222/236 co-relation queries the response was YES. [2024-06-03 18:44:35,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2843 conditions, 1248 events. 755/1248 cut-off events. For 222/236 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6102 event pairs, 249 based on Foata normal form. 13/1224 useless extension candidates. Maximal degree in co-relation 2828. Up to 1093 conditions per place. [2024-06-03 18:44:35,814 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 37 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2024-06-03 18:44:35,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 224 flow [2024-06-03 18:44:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:44:35,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:44:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-03 18:44:35,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-03 18:44:35,820 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 102 transitions. [2024-06-03 18:44:35,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 224 flow [2024-06-03 18:44:35,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 18:44:35,824 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 123 flow [2024-06-03 18:44:35,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-03 18:44:35,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-06-03 18:44:35,825 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 123 flow [2024-06-03 18:44:35,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:35,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:35,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:35,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 18:44:35,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:35,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:35,831 INFO L85 PathProgramCache]: Analyzing trace with hash -214704722, now seen corresponding path program 1 times [2024-06-03 18:44:35,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:35,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887695246] [2024-06-03 18:44:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:35,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:36,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:36,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887695246] [2024-06-03 18:44:36,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887695246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:36,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:36,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 18:44:36,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692142512] [2024-06-03 18:44:36,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:36,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 18:44:36,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:36,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 18:44:36,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 18:44:36,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:44:36,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:36,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:36,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:44:36,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:36,221 INFO L124 PetriNetUnfolderBase]: 705/1163 cut-off events. [2024-06-03 18:44:36,221 INFO L125 PetriNetUnfolderBase]: For 541/541 co-relation queries the response was YES. [2024-06-03 18:44:36,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2881 conditions, 1163 events. 705/1163 cut-off events. For 541/541 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5657 event pairs, 266 based on Foata normal form. 2/1161 useless extension candidates. Maximal degree in co-relation 2864. Up to 1056 conditions per place. [2024-06-03 18:44:36,231 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-06-03 18:44:36,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 279 flow [2024-06-03 18:44:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:44:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:44:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-03 18:44:36,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-03 18:44:36,236 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 123 flow. Second operand 4 states and 102 transitions. [2024-06-03 18:44:36,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 279 flow [2024-06-03 18:44:36,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 264 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 18:44:36,239 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 166 flow [2024-06-03 18:44:36,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2024-06-03 18:44:36,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-03 18:44:36,241 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 166 flow [2024-06-03 18:44:36,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:36,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:36,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:36,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 18:44:36,242 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)] === [2024-06-03 18:44:36,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:36,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1934893922, now seen corresponding path program 1 times [2024-06-03 18:44:36,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:36,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318805137] [2024-06-03 18:44:36,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:36,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:36,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:36,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318805137] [2024-06-03 18:44:36,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318805137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:36,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:36,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 18:44:36,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071613652] [2024-06-03 18:44:36,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:36,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 18:44:36,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:36,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 18:44:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 18:44:36,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:44:36,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:36,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:36,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:44:36,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:36,584 INFO L124 PetriNetUnfolderBase]: 700/1152 cut-off events. [2024-06-03 18:44:36,584 INFO L125 PetriNetUnfolderBase]: For 966/969 co-relation queries the response was YES. [2024-06-03 18:44:36,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3257 conditions, 1152 events. 700/1152 cut-off events. For 966/969 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5616 event pairs, 309 based on Foata normal form. 4/1153 useless extension candidates. Maximal degree in co-relation 3238. Up to 1051 conditions per place. [2024-06-03 18:44:36,594 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 40 selfloop transitions, 9 changer transitions 0/56 dead transitions. [2024-06-03 18:44:36,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 302 flow [2024-06-03 18:44:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:44:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:44:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-03 18:44:36,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 18:44:36,597 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 166 flow. Second operand 4 states and 100 transitions. [2024-06-03 18:44:36,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 302 flow [2024-06-03 18:44:36,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-03 18:44:36,603 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 202 flow [2024-06-03 18:44:36,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-03 18:44:36,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-03 18:44:36,605 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 202 flow [2024-06-03 18:44:36,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:36,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:36,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:36,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 18:44:36,606 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)] === [2024-06-03 18:44:36,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:36,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2078014321, now seen corresponding path program 1 times [2024-06-03 18:44:36,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:36,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741424533] [2024-06-03 18:44:36,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:36,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:36,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:36,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741424533] [2024-06-03 18:44:36,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741424533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:36,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:36,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:36,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494901487] [2024-06-03 18:44:36,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:36,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:36,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:36,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:36,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:36,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:36,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-03 18:44:36,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:36,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:36,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:37,155 INFO L124 PetriNetUnfolderBase]: 931/1522 cut-off events. [2024-06-03 18:44:37,155 INFO L125 PetriNetUnfolderBase]: For 1728/1733 co-relation queries the response was YES. [2024-06-03 18:44:37,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4436 conditions, 1522 events. 931/1522 cut-off events. For 1728/1733 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7570 event pairs, 275 based on Foata normal form. 7/1527 useless extension candidates. Maximal degree in co-relation 4414. Up to 1338 conditions per place. [2024-06-03 18:44:37,168 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 59 selfloop transitions, 20 changer transitions 0/85 dead transitions. [2024-06-03 18:44:37,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 85 transitions, 498 flow [2024-06-03 18:44:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:37,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-03 18:44:37,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-03 18:44:37,170 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 202 flow. Second operand 7 states and 155 transitions. [2024-06-03 18:44:37,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 85 transitions, 498 flow [2024-06-03 18:44:37,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 85 transitions, 490 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 18:44:37,176 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 330 flow [2024-06-03 18:44:37,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=330, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-03 18:44:37,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-03 18:44:37,177 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 330 flow [2024-06-03 18:44:37,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-03 18:44:37,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:37,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:37,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 18:44:37,178 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)] === [2024-06-03 18:44:37,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:37,178 INFO L85 PathProgramCache]: Analyzing trace with hash -176838555, now seen corresponding path program 2 times [2024-06-03 18:44:37,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:37,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241258998] [2024-06-03 18:44:37,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:37,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:37,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:37,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241258998] [2024-06-03 18:44:37,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241258998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:37,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:37,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:37,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7164701] [2024-06-03 18:44:37,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:37,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:37,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:37,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:37,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:37,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:37,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 330 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-03 18:44:37,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:37,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:37,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:37,659 INFO L124 PetriNetUnfolderBase]: 926/1514 cut-off events. [2024-06-03 18:44:37,659 INFO L125 PetriNetUnfolderBase]: For 3245/3245 co-relation queries the response was YES. [2024-06-03 18:44:37,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5244 conditions, 1514 events. 926/1514 cut-off events. For 3245/3245 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7416 event pairs, 323 based on Foata normal form. 2/1506 useless extension candidates. Maximal degree in co-relation 5216. Up to 1280 conditions per place. [2024-06-03 18:44:37,673 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 59 selfloop transitions, 25 changer transitions 0/90 dead transitions. [2024-06-03 18:44:37,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 658 flow [2024-06-03 18:44:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:44:37,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:44:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-03 18:44:37,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-03 18:44:37,675 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 330 flow. Second operand 6 states and 133 transitions. [2024-06-03 18:44:37,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 658 flow [2024-06-03 18:44:37,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 629 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-03 18:44:37,683 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 492 flow [2024-06-03 18:44:37,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=492, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2024-06-03 18:44:37,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-03 18:44:37,684 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 492 flow [2024-06-03 18:44:37,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-03 18:44:37,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:37,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:37,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 18:44:37,685 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)] === [2024-06-03 18:44:37,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:37,686 INFO L85 PathProgramCache]: Analyzing trace with hash -287738719, now seen corresponding path program 1 times [2024-06-03 18:44:37,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:37,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223955128] [2024-06-03 18:44:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:37,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:37,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:37,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223955128] [2024-06-03 18:44:37,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223955128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:37,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:37,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:44:37,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124973778] [2024-06-03 18:44:37,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:37,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:44:37,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:37,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:44:37,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:44:37,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:44:37,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 492 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:37,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:37,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:44:37,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:38,081 INFO L124 PetriNetUnfolderBase]: 825/1405 cut-off events. [2024-06-03 18:44:38,081 INFO L125 PetriNetUnfolderBase]: For 4860/4880 co-relation queries the response was YES. [2024-06-03 18:44:38,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5483 conditions, 1405 events. 825/1405 cut-off events. For 4860/4880 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7074 event pairs, 280 based on Foata normal form. 22/1422 useless extension candidates. Maximal degree in co-relation 5449. Up to 1211 conditions per place. [2024-06-03 18:44:38,095 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 69 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2024-06-03 18:44:38,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 710 flow [2024-06-03 18:44:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:44:38,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:44:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-03 18:44:38,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-03 18:44:38,097 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 492 flow. Second operand 5 states and 121 transitions. [2024-06-03 18:44:38,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 710 flow [2024-06-03 18:44:38,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 88 transitions, 693 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-03 18:44:38,105 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 524 flow [2024-06-03 18:44:38,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=524, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-03 18:44:38,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-03 18:44:38,106 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 524 flow [2024-06-03 18:44:38,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:38,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:38,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:38,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 18:44:38,107 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)] === [2024-06-03 18:44:38,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:38,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1911092097, now seen corresponding path program 1 times [2024-06-03 18:44:38,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:38,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783513864] [2024-06-03 18:44:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:38,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:38,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:38,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783513864] [2024-06-03 18:44:38,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783513864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:38,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:38,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:38,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673442002] [2024-06-03 18:44:38,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:38,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:38,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:38,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:38,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:38,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:38,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 524 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:38,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:38,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:38,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:38,603 INFO L124 PetriNetUnfolderBase]: 902/1486 cut-off events. [2024-06-03 18:44:38,603 INFO L125 PetriNetUnfolderBase]: For 5503/5510 co-relation queries the response was YES. [2024-06-03 18:44:38,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5947 conditions, 1486 events. 902/1486 cut-off events. For 5503/5510 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7302 event pairs, 295 based on Foata normal form. 9/1493 useless extension candidates. Maximal degree in co-relation 5911. Up to 1299 conditions per place. [2024-06-03 18:44:38,617 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 65 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-03 18:44:38,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 97 transitions, 783 flow [2024-06-03 18:44:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-03 18:44:38,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-03 18:44:38,619 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 524 flow. Second operand 7 states and 153 transitions. [2024-06-03 18:44:38,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 97 transitions, 783 flow [2024-06-03 18:44:38,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 97 transitions, 744 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 18:44:38,631 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 549 flow [2024-06-03 18:44:38,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=549, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-06-03 18:44:38,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-03 18:44:38,634 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 549 flow [2024-06-03 18:44:38,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:38,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:38,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:38,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 18:44:38,635 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)] === [2024-06-03 18:44:38,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:38,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1245359277, now seen corresponding path program 2 times [2024-06-03 18:44:38,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:38,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330890443] [2024-06-03 18:44:38,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:38,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:38,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:38,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330890443] [2024-06-03 18:44:38,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330890443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:38,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:38,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:38,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481891294] [2024-06-03 18:44:38,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:38,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:38,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:38,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:38,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:38,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:38,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 549 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:38,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:38,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:38,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:39,092 INFO L124 PetriNetUnfolderBase]: 913/1506 cut-off events. [2024-06-03 18:44:39,092 INFO L125 PetriNetUnfolderBase]: For 6728/6740 co-relation queries the response was YES. [2024-06-03 18:44:39,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6137 conditions, 1506 events. 913/1506 cut-off events. For 6728/6740 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7425 event pairs, 315 based on Foata normal form. 10/1509 useless extension candidates. Maximal degree in co-relation 6099. Up to 1259 conditions per place. [2024-06-03 18:44:39,108 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 63 selfloop transitions, 27 changer transitions 0/96 dead transitions. [2024-06-03 18:44:39,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 96 transitions, 855 flow [2024-06-03 18:44:39,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:44:39,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:44:39,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-03 18:44:39,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-03 18:44:39,110 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 549 flow. Second operand 6 states and 133 transitions. [2024-06-03 18:44:39,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 96 transitions, 855 flow [2024-06-03 18:44:39,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 803 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 18:44:39,120 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 599 flow [2024-06-03 18:44:39,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=599, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-06-03 18:44:39,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-03 18:44:39,121 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 599 flow [2024-06-03 18:44:39,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:39,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:39,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:39,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 18:44:39,122 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)] === [2024-06-03 18:44:39,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:39,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1269484407, now seen corresponding path program 3 times [2024-06-03 18:44:39,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:39,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52946288] [2024-06-03 18:44:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:39,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:39,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:39,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52946288] [2024-06-03 18:44:39,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52946288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:39,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:39,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:44:39,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821886417] [2024-06-03 18:44:39,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:39,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:44:39,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:39,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:44:39,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:44:39,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:39,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 599 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-03 18:44:39,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:39,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:39,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:39,701 INFO L124 PetriNetUnfolderBase]: 908/1487 cut-off events. [2024-06-03 18:44:39,701 INFO L125 PetriNetUnfolderBase]: For 7414/7414 co-relation queries the response was YES. [2024-06-03 18:44:39,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6226 conditions, 1487 events. 908/1487 cut-off events. For 7414/7414 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7211 event pairs, 315 based on Foata normal form. 2/1479 useless extension candidates. Maximal degree in co-relation 6187. Up to 1254 conditions per place. [2024-06-03 18:44:39,714 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 63 selfloop transitions, 29 changer transitions 0/98 dead transitions. [2024-06-03 18:44:39,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 98 transitions, 843 flow [2024-06-03 18:44:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:39,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 18:44:39,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-03 18:44:39,716 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 599 flow. Second operand 7 states and 150 transitions. [2024-06-03 18:44:39,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 98 transitions, 843 flow [2024-06-03 18:44:39,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 98 transitions, 798 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 18:44:39,732 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 620 flow [2024-06-03 18:44:39,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=620, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-06-03 18:44:39,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-03 18:44:39,733 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 620 flow [2024-06-03 18:44:39,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-03 18:44:39,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:39,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:39,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 18:44:39,734 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)] === [2024-06-03 18:44:39,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:39,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1477445657, now seen corresponding path program 1 times [2024-06-03 18:44:39,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:39,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355928683] [2024-06-03 18:44:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:39,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:39,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:39,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355928683] [2024-06-03 18:44:39,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355928683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:39,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:39,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:44:39,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160176053] [2024-06-03 18:44:39,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:39,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:44:39,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:39,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:44:39,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:44:39,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:44:39,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 620 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) [2024-06-03 18:44:39,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:39,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:44:39,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:40,110 INFO L124 PetriNetUnfolderBase]: 843/1406 cut-off events. [2024-06-03 18:44:40,110 INFO L125 PetriNetUnfolderBase]: For 9013/9023 co-relation queries the response was YES. [2024-06-03 18:44:40,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5971 conditions, 1406 events. 843/1406 cut-off events. For 9013/9023 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7192 event pairs, 455 based on Foata normal form. 11/1409 useless extension candidates. Maximal degree in co-relation 5930. Up to 1263 conditions per place. [2024-06-03 18:44:40,123 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 70 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2024-06-03 18:44:40,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 91 transitions, 854 flow [2024-06-03 18:44:40,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:44:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:44:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-03 18:44:40,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 18:44:40,125 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 620 flow. Second operand 4 states and 96 transitions. [2024-06-03 18:44:40,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 91 transitions, 854 flow [2024-06-03 18:44:40,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 91 transitions, 782 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 18:44:40,143 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 638 flow [2024-06-03 18:44:40,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=638, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-03 18:44:40,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-03 18:44:40,144 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 638 flow [2024-06-03 18:44:40,144 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) [2024-06-03 18:44:40,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:40,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:40,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 18:44:40,145 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)] === [2024-06-03 18:44:40,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:40,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1429467628, now seen corresponding path program 1 times [2024-06-03 18:44:40,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:40,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493388141] [2024-06-03 18:44:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:40,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:40,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:40,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493388141] [2024-06-03 18:44:40,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493388141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:40,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:40,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:44:40,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417907469] [2024-06-03 18:44:40,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:40,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:44:40,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:40,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:44:40,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:44:40,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:40,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 638 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-03 18:44:40,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:40,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:40,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:40,767 INFO L124 PetriNetUnfolderBase]: 1310/2151 cut-off events. [2024-06-03 18:44:40,768 INFO L125 PetriNetUnfolderBase]: For 14299/14299 co-relation queries the response was YES. [2024-06-03 18:44:40,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9493 conditions, 2151 events. 1310/2151 cut-off events. For 14299/14299 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11518 event pairs, 185 based on Foata normal form. 4/2151 useless extension candidates. Maximal degree in co-relation 9451. Up to 1313 conditions per place. [2024-06-03 18:44:40,783 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 90 selfloop transitions, 47 changer transitions 0/143 dead transitions. [2024-06-03 18:44:40,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 143 transitions, 1296 flow [2024-06-03 18:44:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 18:44:40,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-03 18:44:40,785 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 638 flow. Second operand 7 states and 176 transitions. [2024-06-03 18:44:40,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 143 transitions, 1296 flow [2024-06-03 18:44:40,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 143 transitions, 1290 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-03 18:44:40,813 INFO L231 Difference]: Finished difference. Result has 90 places, 101 transitions, 934 flow [2024-06-03 18:44:40,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=934, PETRI_PLACES=90, PETRI_TRANSITIONS=101} [2024-06-03 18:44:40,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-03 18:44:40,814 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 101 transitions, 934 flow [2024-06-03 18:44:40,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-03 18:44:40,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:40,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:40,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 18:44:40,815 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)] === [2024-06-03 18:44:40,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:40,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1514773454, now seen corresponding path program 2 times [2024-06-03 18:44:40,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:40,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605940785] [2024-06-03 18:44:40,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:40,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:41,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:41,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605940785] [2024-06-03 18:44:41,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605940785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:41,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:41,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:44:41,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710028665] [2024-06-03 18:44:41,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:41,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:44:41,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:41,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:44:41,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:44:41,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:41,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 101 transitions, 934 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-03 18:44:41,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:41,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:41,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:41,479 INFO L124 PetriNetUnfolderBase]: 1346/2209 cut-off events. [2024-06-03 18:44:41,479 INFO L125 PetriNetUnfolderBase]: For 19418/19420 co-relation queries the response was YES. [2024-06-03 18:44:41,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11093 conditions, 2209 events. 1346/2209 cut-off events. For 19418/19420 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11856 event pairs, 232 based on Foata normal form. 8/2213 useless extension candidates. Maximal degree in co-relation 11045. Up to 1325 conditions per place. [2024-06-03 18:44:41,496 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 80 selfloop transitions, 52 changer transitions 0/138 dead transitions. [2024-06-03 18:44:41,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 138 transitions, 1453 flow [2024-06-03 18:44:41,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 18:44:41,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 18:44:41,498 INFO L175 Difference]: Start difference. First operand has 90 places, 101 transitions, 934 flow. Second operand 7 states and 163 transitions. [2024-06-03 18:44:41,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 138 transitions, 1453 flow [2024-06-03 18:44:41,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 138 transitions, 1385 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-03 18:44:41,535 INFO L231 Difference]: Finished difference. Result has 96 places, 106 transitions, 1068 flow [2024-06-03 18:44:41,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1068, PETRI_PLACES=96, PETRI_TRANSITIONS=106} [2024-06-03 18:44:41,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-03 18:44:41,536 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 106 transitions, 1068 flow [2024-06-03 18:44:41,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-03 18:44:41,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:41,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:41,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 18:44:41,537 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)] === [2024-06-03 18:44:41,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:41,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1839336788, now seen corresponding path program 3 times [2024-06-03 18:44:41,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:41,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459555413] [2024-06-03 18:44:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:41,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:41,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:41,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459555413] [2024-06-03 18:44:41,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459555413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:41,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:41,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:44:41,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539892011] [2024-06-03 18:44:41,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:41,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:44:41,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:41,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:44:41,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:44:41,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:41,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 106 transitions, 1068 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-03 18:44:41,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:41,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:41,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:42,199 INFO L124 PetriNetUnfolderBase]: 1322/2185 cut-off events. [2024-06-03 18:44:42,200 INFO L125 PetriNetUnfolderBase]: For 21254/21256 co-relation queries the response was YES. [2024-06-03 18:44:42,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11311 conditions, 2185 events. 1322/2185 cut-off events. For 21254/21256 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11852 event pairs, 409 based on Foata normal form. 10/2191 useless extension candidates. Maximal degree in co-relation 11260. Up to 1865 conditions per place. [2024-06-03 18:44:42,217 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 87 selfloop transitions, 43 changer transitions 0/136 dead transitions. [2024-06-03 18:44:42,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 136 transitions, 1526 flow [2024-06-03 18:44:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:42,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 18:44:42,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-03 18:44:42,219 INFO L175 Difference]: Start difference. First operand has 96 places, 106 transitions, 1068 flow. Second operand 7 states and 157 transitions. [2024-06-03 18:44:42,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 136 transitions, 1526 flow [2024-06-03 18:44:42,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 136 transitions, 1408 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 18:44:42,258 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 1170 flow [2024-06-03 18:44:42,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1170, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2024-06-03 18:44:42,260 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-03 18:44:42,260 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 1170 flow [2024-06-03 18:44:42,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-03 18:44:42,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:42,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:42,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 18:44:42,261 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)] === [2024-06-03 18:44:42,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:42,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1000974640, now seen corresponding path program 4 times [2024-06-03 18:44:42,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:42,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180339504] [2024-06-03 18:44:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:42,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:42,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:42,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180339504] [2024-06-03 18:44:42,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180339504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:42,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:42,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:44:42,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855296979] [2024-06-03 18:44:42,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:42,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:44:42,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:42,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:44:42,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:44:42,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:42,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 1170 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-03 18:44:42,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:42,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:42,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:42,894 INFO L124 PetriNetUnfolderBase]: 1314/2161 cut-off events. [2024-06-03 18:44:42,895 INFO L125 PetriNetUnfolderBase]: For 22816/22818 co-relation queries the response was YES. [2024-06-03 18:44:42,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11296 conditions, 2161 events. 1314/2161 cut-off events. For 22816/22818 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11655 event pairs, 426 based on Foata normal form. 4/2153 useless extension candidates. Maximal degree in co-relation 11243. Up to 1877 conditions per place. [2024-06-03 18:44:42,916 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 100 selfloop transitions, 32 changer transitions 0/138 dead transitions. [2024-06-03 18:44:42,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 138 transitions, 1539 flow [2024-06-03 18:44:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:42,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 18:44:42,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-03 18:44:42,918 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 1170 flow. Second operand 7 states and 150 transitions. [2024-06-03 18:44:42,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 138 transitions, 1539 flow [2024-06-03 18:44:42,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 138 transitions, 1455 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 18:44:42,966 INFO L231 Difference]: Finished difference. Result has 104 places, 115 transitions, 1185 flow [2024-06-03 18:44:42,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1185, PETRI_PLACES=104, PETRI_TRANSITIONS=115} [2024-06-03 18:44:42,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-03 18:44:42,967 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 115 transitions, 1185 flow [2024-06-03 18:44:42,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-03 18:44:42,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:42,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:42,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 18:44:42,968 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:42,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:42,969 INFO L85 PathProgramCache]: Analyzing trace with hash -347133270, now seen corresponding path program 1 times [2024-06-03 18:44:42,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:42,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110668891] [2024-06-03 18:44:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:42,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:43,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:43,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110668891] [2024-06-03 18:44:43,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110668891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:43,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:43,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:44:43,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235579532] [2024-06-03 18:44:43,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:43,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:44:43,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:43,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:44:43,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:44:43,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:44:43,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 115 transitions, 1185 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) [2024-06-03 18:44:43,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:43,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:44:43,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:43,422 INFO L124 PetriNetUnfolderBase]: 1228/2088 cut-off events. [2024-06-03 18:44:43,422 INFO L125 PetriNetUnfolderBase]: For 23853/23871 co-relation queries the response was YES. [2024-06-03 18:44:43,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11025 conditions, 2088 events. 1228/2088 cut-off events. For 23853/23871 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11565 event pairs, 401 based on Foata normal form. 9/2081 useless extension candidates. Maximal degree in co-relation 10970. Up to 1814 conditions per place. [2024-06-03 18:44:43,441 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 97 selfloop transitions, 26 changer transitions 0/134 dead transitions. [2024-06-03 18:44:43,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 134 transitions, 1557 flow [2024-06-03 18:44:43,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:44:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:44:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-03 18:44:43,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 18:44:43,443 INFO L175 Difference]: Start difference. First operand has 104 places, 115 transitions, 1185 flow. Second operand 5 states and 120 transitions. [2024-06-03 18:44:43,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 134 transitions, 1557 flow [2024-06-03 18:44:43,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 134 transitions, 1476 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 18:44:43,483 INFO L231 Difference]: Finished difference. Result has 105 places, 121 transitions, 1246 flow [2024-06-03 18:44:43,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1246, PETRI_PLACES=105, PETRI_TRANSITIONS=121} [2024-06-03 18:44:43,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-03 18:44:43,484 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 121 transitions, 1246 flow [2024-06-03 18:44:43,484 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) [2024-06-03 18:44:43,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:43,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:43,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 18:44:43,485 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)] === [2024-06-03 18:44:43,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:43,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1597819296, now seen corresponding path program 1 times [2024-06-03 18:44:43,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:43,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510020185] [2024-06-03 18:44:43,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:43,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:43,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:43,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510020185] [2024-06-03 18:44:43,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510020185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:43,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:43,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:44:43,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659088536] [2024-06-03 18:44:43,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:43,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:44:43,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:43,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:44:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:44:43,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:43,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 121 transitions, 1246 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:43,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:43,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:43,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:44,190 INFO L124 PetriNetUnfolderBase]: 1389/2319 cut-off events. [2024-06-03 18:44:44,191 INFO L125 PetriNetUnfolderBase]: For 31097/31104 co-relation queries the response was YES. [2024-06-03 18:44:44,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12458 conditions, 2319 events. 1389/2319 cut-off events. For 31097/31104 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12804 event pairs, 291 based on Foata normal form. 36/2353 useless extension candidates. Maximal degree in co-relation 12402. Up to 1502 conditions per place. [2024-06-03 18:44:44,211 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 112 selfloop transitions, 44 changer transitions 0/162 dead transitions. [2024-06-03 18:44:44,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 162 transitions, 1816 flow [2024-06-03 18:44:44,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:44:44,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:44:44,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-03 18:44:44,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-03 18:44:44,213 INFO L175 Difference]: Start difference. First operand has 105 places, 121 transitions, 1246 flow. Second operand 8 states and 181 transitions. [2024-06-03 18:44:44,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 162 transitions, 1816 flow [2024-06-03 18:44:44,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 162 transitions, 1766 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-03 18:44:44,272 INFO L231 Difference]: Finished difference. Result has 112 places, 125 transitions, 1360 flow [2024-06-03 18:44:44,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1360, PETRI_PLACES=112, PETRI_TRANSITIONS=125} [2024-06-03 18:44:44,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-03 18:44:44,273 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 125 transitions, 1360 flow [2024-06-03 18:44:44,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:44,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:44,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:44,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 18:44:44,274 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)] === [2024-06-03 18:44:44,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:44,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1553132810, now seen corresponding path program 2 times [2024-06-03 18:44:44,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:44,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7230529] [2024-06-03 18:44:44,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:44,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:44,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:44,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7230529] [2024-06-03 18:44:44,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7230529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:44,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:44,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:44:44,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129870824] [2024-06-03 18:44:44,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:44,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:44:44,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:44,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:44:44,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:44:44,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:44,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 125 transitions, 1360 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:44,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:44,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:44,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:44,964 INFO L124 PetriNetUnfolderBase]: 1325/2226 cut-off events. [2024-06-03 18:44:44,965 INFO L125 PetriNetUnfolderBase]: For 30436/30443 co-relation queries the response was YES. [2024-06-03 18:44:44,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11869 conditions, 2226 events. 1325/2226 cut-off events. For 30436/30443 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12294 event pairs, 386 based on Foata normal form. 38/2262 useless extension candidates. Maximal degree in co-relation 11809. Up to 1810 conditions per place. [2024-06-03 18:44:44,985 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 119 selfloop transitions, 32 changer transitions 0/157 dead transitions. [2024-06-03 18:44:44,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 157 transitions, 1806 flow [2024-06-03 18:44:44,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:44:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:44:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-03 18:44:44,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-03 18:44:44,988 INFO L175 Difference]: Start difference. First operand has 112 places, 125 transitions, 1360 flow. Second operand 8 states and 175 transitions. [2024-06-03 18:44:44,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 157 transitions, 1806 flow [2024-06-03 18:44:45,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 157 transitions, 1732 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 18:44:45,053 INFO L231 Difference]: Finished difference. Result has 116 places, 127 transitions, 1403 flow [2024-06-03 18:44:45,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1403, PETRI_PLACES=116, PETRI_TRANSITIONS=127} [2024-06-03 18:44:45,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-03 18:44:45,054 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 127 transitions, 1403 flow [2024-06-03 18:44:45,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:45,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:45,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:45,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 18:44:45,055 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)] === [2024-06-03 18:44:45,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:45,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1505574932, now seen corresponding path program 3 times [2024-06-03 18:44:45,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:45,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122624965] [2024-06-03 18:44:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:45,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:45,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:45,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122624965] [2024-06-03 18:44:45,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122624965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:45,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:45,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:44:45,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812873392] [2024-06-03 18:44:45,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:45,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:44:45,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:45,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:44:45,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:44:45,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:45,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 127 transitions, 1403 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:45,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:45,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:45,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:45,685 INFO L124 PetriNetUnfolderBase]: 1383/2323 cut-off events. [2024-06-03 18:44:45,685 INFO L125 PetriNetUnfolderBase]: For 30961/30975 co-relation queries the response was YES. [2024-06-03 18:44:45,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12328 conditions, 2323 events. 1383/2323 cut-off events. For 30961/30975 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13037 event pairs, 418 based on Foata normal form. 24/2340 useless extension candidates. Maximal degree in co-relation 12266. Up to 1932 conditions per place. [2024-06-03 18:44:45,703 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 120 selfloop transitions, 28 changer transitions 0/154 dead transitions. [2024-06-03 18:44:45,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 154 transitions, 1816 flow [2024-06-03 18:44:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:45,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 18:44:45,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-03 18:44:45,705 INFO L175 Difference]: Start difference. First operand has 116 places, 127 transitions, 1403 flow. Second operand 7 states and 152 transitions. [2024-06-03 18:44:45,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 154 transitions, 1816 flow [2024-06-03 18:44:45,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 154 transitions, 1751 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 18:44:45,766 INFO L231 Difference]: Finished difference. Result has 117 places, 128 transitions, 1417 flow [2024-06-03 18:44:45,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1417, PETRI_PLACES=117, PETRI_TRANSITIONS=128} [2024-06-03 18:44:45,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-03 18:44:45,767 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 128 transitions, 1417 flow [2024-06-03 18:44:45,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:45,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:45,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:45,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 18:44:45,768 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)] === [2024-06-03 18:44:45,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:45,768 INFO L85 PathProgramCache]: Analyzing trace with hash -851463042, now seen corresponding path program 4 times [2024-06-03 18:44:45,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:45,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383194088] [2024-06-03 18:44:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:45,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:46,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:46,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383194088] [2024-06-03 18:44:46,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383194088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:46,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:46,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:44:46,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442135907] [2024-06-03 18:44:46,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:46,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:44:46,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:46,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:44:46,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:44:46,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:46,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 128 transitions, 1417 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:46,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:46,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:46,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:46,444 INFO L124 PetriNetUnfolderBase]: 1441/2419 cut-off events. [2024-06-03 18:44:46,444 INFO L125 PetriNetUnfolderBase]: For 33409/33411 co-relation queries the response was YES. [2024-06-03 18:44:46,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12837 conditions, 2419 events. 1441/2419 cut-off events. For 33409/33411 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13711 event pairs, 433 based on Foata normal form. 16/2425 useless extension candidates. Maximal degree in co-relation 12774. Up to 2030 conditions per place. [2024-06-03 18:44:46,501 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 122 selfloop transitions, 31 changer transitions 0/159 dead transitions. [2024-06-03 18:44:46,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 159 transitions, 1854 flow [2024-06-03 18:44:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:44:46,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:44:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 18:44:46,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-03 18:44:46,503 INFO L175 Difference]: Start difference. First operand has 117 places, 128 transitions, 1417 flow. Second operand 8 states and 171 transitions. [2024-06-03 18:44:46,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 159 transitions, 1854 flow [2024-06-03 18:44:46,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 159 transitions, 1793 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 18:44:46,565 INFO L231 Difference]: Finished difference. Result has 120 places, 129 transitions, 1443 flow [2024-06-03 18:44:46,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1443, PETRI_PLACES=120, PETRI_TRANSITIONS=129} [2024-06-03 18:44:46,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-03 18:44:46,566 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 129 transitions, 1443 flow [2024-06-03 18:44:46,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:46,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:46,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:46,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 18:44:46,567 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)] === [2024-06-03 18:44:46,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:46,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1728580554, now seen corresponding path program 5 times [2024-06-03 18:44:46,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:46,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425616322] [2024-06-03 18:44:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:46,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:46,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:46,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425616322] [2024-06-03 18:44:46,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425616322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:46,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:46,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:44:46,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582737736] [2024-06-03 18:44:46,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:46,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:44:46,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:46,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:44:46,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:44:46,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:46,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 129 transitions, 1443 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:46,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:46,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:46,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:47,254 INFO L124 PetriNetUnfolderBase]: 1457/2451 cut-off events. [2024-06-03 18:44:47,254 INFO L125 PetriNetUnfolderBase]: For 34647/34649 co-relation queries the response was YES. [2024-06-03 18:44:47,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12985 conditions, 2451 events. 1457/2451 cut-off events. For 34647/34649 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13949 event pairs, 426 based on Foata normal form. 12/2453 useless extension candidates. Maximal degree in co-relation 12921. Up to 1975 conditions per place. [2024-06-03 18:44:47,273 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 127 selfloop transitions, 34 changer transitions 0/167 dead transitions. [2024-06-03 18:44:47,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 167 transitions, 1926 flow [2024-06-03 18:44:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:44:47,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:44:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-03 18:44:47,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-03 18:44:47,275 INFO L175 Difference]: Start difference. First operand has 120 places, 129 transitions, 1443 flow. Second operand 9 states and 192 transitions. [2024-06-03 18:44:47,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 167 transitions, 1926 flow [2024-06-03 18:44:47,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 167 transitions, 1857 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 18:44:47,340 INFO L231 Difference]: Finished difference. Result has 123 places, 130 transitions, 1468 flow [2024-06-03 18:44:47,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1468, PETRI_PLACES=123, PETRI_TRANSITIONS=130} [2024-06-03 18:44:47,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-03 18:44:47,341 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 130 transitions, 1468 flow [2024-06-03 18:44:47,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:47,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:47,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:47,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 18:44:47,341 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:47,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:47,342 INFO L85 PathProgramCache]: Analyzing trace with hash -70127820, now seen corresponding path program 1 times [2024-06-03 18:44:47,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:47,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293582354] [2024-06-03 18:44:47,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:47,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:47,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:47,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293582354] [2024-06-03 18:44:47,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293582354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:47,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:47,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:44:47,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023450955] [2024-06-03 18:44:47,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:47,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:44:47,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:47,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:44:47,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:44:47,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:47,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 130 transitions, 1468 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:47,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:47,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:47,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:47,944 INFO L124 PetriNetUnfolderBase]: 1437/2428 cut-off events. [2024-06-03 18:44:47,944 INFO L125 PetriNetUnfolderBase]: For 35145/35159 co-relation queries the response was YES. [2024-06-03 18:44:47,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12729 conditions, 2428 events. 1437/2428 cut-off events. For 35145/35159 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13824 event pairs, 376 based on Foata normal form. 20/2441 useless extension candidates. Maximal degree in co-relation 12664. Up to 1649 conditions per place. [2024-06-03 18:44:47,966 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 120 selfloop transitions, 35 changer transitions 0/161 dead transitions. [2024-06-03 18:44:47,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 161 transitions, 1875 flow [2024-06-03 18:44:47,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:47,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 18:44:47,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:44:47,968 INFO L175 Difference]: Start difference. First operand has 123 places, 130 transitions, 1468 flow. Second operand 7 states and 154 transitions. [2024-06-03 18:44:47,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 161 transitions, 1875 flow [2024-06-03 18:44:48,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 161 transitions, 1795 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 18:44:48,033 INFO L231 Difference]: Finished difference. Result has 122 places, 129 transitions, 1425 flow [2024-06-03 18:44:48,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1425, PETRI_PLACES=122, PETRI_TRANSITIONS=129} [2024-06-03 18:44:48,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-03 18:44:48,034 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 129 transitions, 1425 flow [2024-06-03 18:44:48,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:48,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:48,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:48,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 18:44:48,035 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)] === [2024-06-03 18:44:48,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:48,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1217608856, now seen corresponding path program 1 times [2024-06-03 18:44:48,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:48,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025488599] [2024-06-03 18:44:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:48,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:48,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:48,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025488599] [2024-06-03 18:44:48,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025488599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:48,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:48,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:44:48,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660091603] [2024-06-03 18:44:48,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:48,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:44:48,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:48,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:44:48,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:44:48,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:48,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 129 transitions, 1425 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:48,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:48,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:48,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:48,645 INFO L124 PetriNetUnfolderBase]: 1435/2448 cut-off events. [2024-06-03 18:44:48,645 INFO L125 PetriNetUnfolderBase]: For 35550/35558 co-relation queries the response was YES. [2024-06-03 18:44:48,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12999 conditions, 2448 events. 1435/2448 cut-off events. For 35550/35558 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14128 event pairs, 400 based on Foata normal form. 7/2443 useless extension candidates. Maximal degree in co-relation 12933. Up to 2122 conditions per place. [2024-06-03 18:44:48,668 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 105 selfloop transitions, 37 changer transitions 0/161 dead transitions. [2024-06-03 18:44:48,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 161 transitions, 1981 flow [2024-06-03 18:44:48,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-03 18:44:48,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-03 18:44:48,670 INFO L175 Difference]: Start difference. First operand has 122 places, 129 transitions, 1425 flow. Second operand 7 states and 151 transitions. [2024-06-03 18:44:48,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 161 transitions, 1981 flow [2024-06-03 18:44:48,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 161 transitions, 1907 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 18:44:48,737 INFO L231 Difference]: Finished difference. Result has 127 places, 147 transitions, 1662 flow [2024-06-03 18:44:48,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1662, PETRI_PLACES=127, PETRI_TRANSITIONS=147} [2024-06-03 18:44:48,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-03 18:44:48,738 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 147 transitions, 1662 flow [2024-06-03 18:44:48,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:48,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:48,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:48,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 18:44:48,739 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)] === [2024-06-03 18:44:48,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:48,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1796539398, now seen corresponding path program 2 times [2024-06-03 18:44:48,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:48,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338902465] [2024-06-03 18:44:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:48,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:48,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:48,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338902465] [2024-06-03 18:44:48,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338902465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:48,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:48,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:48,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274320942] [2024-06-03 18:44:48,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:48,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:48,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:48,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:48,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:48,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:44:48,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 147 transitions, 1662 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:48,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:48,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:44:48,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:49,271 INFO L124 PetriNetUnfolderBase]: 1427/2433 cut-off events. [2024-06-03 18:44:49,271 INFO L125 PetriNetUnfolderBase]: For 37379/37390 co-relation queries the response was YES. [2024-06-03 18:44:49,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13181 conditions, 2433 events. 1427/2433 cut-off events. For 37379/37390 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14080 event pairs, 409 based on Foata normal form. 5/2422 useless extension candidates. Maximal degree in co-relation 13112. Up to 2117 conditions per place. [2024-06-03 18:44:49,287 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 106 selfloop transitions, 29 changer transitions 0/154 dead transitions. [2024-06-03 18:44:49,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 154 transitions, 1954 flow [2024-06-03 18:44:49,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:44:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:44:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-03 18:44:49,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-03 18:44:49,288 INFO L175 Difference]: Start difference. First operand has 127 places, 147 transitions, 1662 flow. Second operand 4 states and 97 transitions. [2024-06-03 18:44:49,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 154 transitions, 1954 flow [2024-06-03 18:44:49,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 154 transitions, 1922 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-03 18:44:49,340 INFO L231 Difference]: Finished difference. Result has 131 places, 147 transitions, 1704 flow [2024-06-03 18:44:49,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1704, PETRI_PLACES=131, PETRI_TRANSITIONS=147} [2024-06-03 18:44:49,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-03 18:44:49,341 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 147 transitions, 1704 flow [2024-06-03 18:44:49,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:49,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:49,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:49,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 18:44:49,342 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)] === [2024-06-03 18:44:49,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:49,342 INFO L85 PathProgramCache]: Analyzing trace with hash -133447772, now seen corresponding path program 3 times [2024-06-03 18:44:49,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:49,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355029282] [2024-06-03 18:44:49,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:49,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:49,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:49,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355029282] [2024-06-03 18:44:49,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355029282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:49,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:49,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:49,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286215747] [2024-06-03 18:44:49,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:49,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:49,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:49,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:44:49,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 147 transitions, 1704 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:49,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:49,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:44:49,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:49,828 INFO L124 PetriNetUnfolderBase]: 1421/2424 cut-off events. [2024-06-03 18:44:49,829 INFO L125 PetriNetUnfolderBase]: For 39661/39668 co-relation queries the response was YES. [2024-06-03 18:44:49,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13265 conditions, 2424 events. 1421/2424 cut-off events. For 39661/39668 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13978 event pairs, 408 based on Foata normal form. 6/2414 useless extension candidates. Maximal degree in co-relation 13193. Up to 2107 conditions per place. [2024-06-03 18:44:49,845 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 107 selfloop transitions, 32 changer transitions 0/158 dead transitions. [2024-06-03 18:44:49,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 158 transitions, 2032 flow [2024-06-03 18:44:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:44:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:44:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-03 18:44:49,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 18:44:49,847 INFO L175 Difference]: Start difference. First operand has 131 places, 147 transitions, 1704 flow. Second operand 5 states and 115 transitions. [2024-06-03 18:44:49,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 158 transitions, 2032 flow [2024-06-03 18:44:49,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 158 transitions, 1963 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 18:44:49,902 INFO L231 Difference]: Finished difference. Result has 132 places, 150 transitions, 1737 flow [2024-06-03 18:44:49,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1737, PETRI_PLACES=132, PETRI_TRANSITIONS=150} [2024-06-03 18:44:49,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-03 18:44:49,903 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 150 transitions, 1737 flow [2024-06-03 18:44:49,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:49,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:49,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:49,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 18:44:49,904 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)] === [2024-06-03 18:44:49,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:49,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2123651450, now seen corresponding path program 1 times [2024-06-03 18:44:49,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:49,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680797034] [2024-06-03 18:44:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:49,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:50,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:50,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680797034] [2024-06-03 18:44:50,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680797034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:50,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:50,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:44:50,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736530] [2024-06-03 18:44:50,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:50,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:44:50,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:50,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:44:50,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:44:50,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:44:50,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 150 transitions, 1737 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:50,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:50,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:44:50,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:50,407 INFO L124 PetriNetUnfolderBase]: 1410/2435 cut-off events. [2024-06-03 18:44:50,407 INFO L125 PetriNetUnfolderBase]: For 39709/39730 co-relation queries the response was YES. [2024-06-03 18:44:50,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13504 conditions, 2435 events. 1410/2435 cut-off events. For 39709/39730 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14150 event pairs, 405 based on Foata normal form. 17/2434 useless extension candidates. Maximal degree in co-relation 13432. Up to 2113 conditions per place. [2024-06-03 18:44:50,424 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 129 selfloop transitions, 26 changer transitions 0/167 dead transitions. [2024-06-03 18:44:50,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 167 transitions, 2180 flow [2024-06-03 18:44:50,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:44:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:44:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-03 18:44:50,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-03 18:44:50,426 INFO L175 Difference]: Start difference. First operand has 132 places, 150 transitions, 1737 flow. Second operand 5 states and 119 transitions. [2024-06-03 18:44:50,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 167 transitions, 2180 flow [2024-06-03 18:44:50,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 167 transitions, 2100 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 18:44:50,482 INFO L231 Difference]: Finished difference. Result has 134 places, 153 transitions, 1748 flow [2024-06-03 18:44:50,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1748, PETRI_PLACES=134, PETRI_TRANSITIONS=153} [2024-06-03 18:44:50,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-03 18:44:50,482 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 153 transitions, 1748 flow [2024-06-03 18:44:50,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:50,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:50,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:50,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 18:44:50,483 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)] === [2024-06-03 18:44:50,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:50,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1449518836, now seen corresponding path program 2 times [2024-06-03 18:44:50,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:50,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731057172] [2024-06-03 18:44:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:50,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:50,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:50,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731057172] [2024-06-03 18:44:50,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731057172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:50,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:50,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:50,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501332109] [2024-06-03 18:44:50,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:50,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:50,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:50,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:50,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:50,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:44:50,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 153 transitions, 1748 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:50,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:50,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:44:50,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:50,966 INFO L124 PetriNetUnfolderBase]: 1409/2423 cut-off events. [2024-06-03 18:44:50,966 INFO L125 PetriNetUnfolderBase]: For 40873/40892 co-relation queries the response was YES. [2024-06-03 18:44:50,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13510 conditions, 2423 events. 1409/2423 cut-off events. For 40873/40892 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14021 event pairs, 407 based on Foata normal form. 10/2413 useless extension candidates. Maximal degree in co-relation 13437. Up to 2108 conditions per place. [2024-06-03 18:44:50,980 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 124 selfloop transitions, 32 changer transitions 0/168 dead transitions. [2024-06-03 18:44:50,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 168 transitions, 2164 flow [2024-06-03 18:44:50,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:44:50,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:44:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 18:44:50,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-03 18:44:50,981 INFO L175 Difference]: Start difference. First operand has 134 places, 153 transitions, 1748 flow. Second operand 6 states and 137 transitions. [2024-06-03 18:44:50,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 168 transitions, 2164 flow [2024-06-03 18:44:51,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 168 transitions, 2080 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 18:44:51,040 INFO L231 Difference]: Finished difference. Result has 137 places, 153 transitions, 1734 flow [2024-06-03 18:44:51,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1734, PETRI_PLACES=137, PETRI_TRANSITIONS=153} [2024-06-03 18:44:51,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-03 18:44:51,041 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 153 transitions, 1734 flow [2024-06-03 18:44:51,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:51,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:51,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:51,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 18:44:51,041 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)] === [2024-06-03 18:44:51,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:51,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1631556840, now seen corresponding path program 1 times [2024-06-03 18:44:51,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:51,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829533506] [2024-06-03 18:44:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:51,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:51,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:51,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829533506] [2024-06-03 18:44:51,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829533506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:51,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:51,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:51,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292904247] [2024-06-03 18:44:51,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:51,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:51,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:51,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:51,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:51,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:51,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 153 transitions, 1734 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:51,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:51,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:51,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:51,484 INFO L124 PetriNetUnfolderBase]: 1494/2521 cut-off events. [2024-06-03 18:44:51,485 INFO L125 PetriNetUnfolderBase]: For 44525/44527 co-relation queries the response was YES. [2024-06-03 18:44:51,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14124 conditions, 2521 events. 1494/2521 cut-off events. For 44525/44527 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14386 event pairs, 733 based on Foata normal form. 1/2519 useless extension candidates. Maximal degree in co-relation 14051. Up to 2263 conditions per place. [2024-06-03 18:44:51,500 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 158 selfloop transitions, 28 changer transitions 0/192 dead transitions. [2024-06-03 18:44:51,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 192 transitions, 2564 flow [2024-06-03 18:44:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:44:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:44:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-03 18:44:51,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 18:44:51,501 INFO L175 Difference]: Start difference. First operand has 137 places, 153 transitions, 1734 flow. Second operand 6 states and 135 transitions. [2024-06-03 18:44:51,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 192 transitions, 2564 flow [2024-06-03 18:44:51,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 192 transitions, 2482 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-03 18:44:51,564 INFO L231 Difference]: Finished difference. Result has 143 places, 172 transitions, 2019 flow [2024-06-03 18:44:51,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2019, PETRI_PLACES=143, PETRI_TRANSITIONS=172} [2024-06-03 18:44:51,565 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-03 18:44:51,565 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 172 transitions, 2019 flow [2024-06-03 18:44:51,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:51,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:51,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:51,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 18:44:51,566 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)] === [2024-06-03 18:44:51,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:51,566 INFO L85 PathProgramCache]: Analyzing trace with hash -133441820, now seen corresponding path program 2 times [2024-06-03 18:44:51,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:51,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173545937] [2024-06-03 18:44:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:51,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:51,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:51,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173545937] [2024-06-03 18:44:51,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173545937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:51,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:51,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:51,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212536358] [2024-06-03 18:44:51,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:51,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:51,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:51,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:51,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:51,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 172 transitions, 2019 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:51,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:51,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:51,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:52,027 INFO L124 PetriNetUnfolderBase]: 1507/2547 cut-off events. [2024-06-03 18:44:52,027 INFO L125 PetriNetUnfolderBase]: For 49091/49093 co-relation queries the response was YES. [2024-06-03 18:44:52,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14736 conditions, 2547 events. 1507/2547 cut-off events. For 49091/49093 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14597 event pairs, 726 based on Foata normal form. 1/2547 useless extension candidates. Maximal degree in co-relation 14658. Up to 2296 conditions per place. [2024-06-03 18:44:52,043 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 167 selfloop transitions, 26 changer transitions 0/199 dead transitions. [2024-06-03 18:44:52,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 199 transitions, 2711 flow [2024-06-03 18:44:52,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:52,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-03 18:44:52,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-03 18:44:52,045 INFO L175 Difference]: Start difference. First operand has 143 places, 172 transitions, 2019 flow. Second operand 7 states and 151 transitions. [2024-06-03 18:44:52,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 199 transitions, 2711 flow [2024-06-03 18:44:52,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 199 transitions, 2657 flow, removed 27 selfloop flow, removed 0 redundant places. [2024-06-03 18:44:52,122 INFO L231 Difference]: Finished difference. Result has 152 places, 183 transitions, 2196 flow [2024-06-03 18:44:52,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1977, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2196, PETRI_PLACES=152, PETRI_TRANSITIONS=183} [2024-06-03 18:44:52,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-03 18:44:52,122 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 183 transitions, 2196 flow [2024-06-03 18:44:52,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:52,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:52,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:52,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 18:44:52,123 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)] === [2024-06-03 18:44:52,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:52,124 INFO L85 PathProgramCache]: Analyzing trace with hash -119379290, now seen corresponding path program 3 times [2024-06-03 18:44:52,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:52,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918532164] [2024-06-03 18:44:52,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:52,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:52,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:52,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918532164] [2024-06-03 18:44:52,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918532164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:52,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:52,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:52,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32384597] [2024-06-03 18:44:52,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:52,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:52,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:52,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:52,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:52,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:52,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 183 transitions, 2196 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:52,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:52,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:52,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:52,675 INFO L124 PetriNetUnfolderBase]: 1504/2543 cut-off events. [2024-06-03 18:44:52,676 INFO L125 PetriNetUnfolderBase]: For 51582/51584 co-relation queries the response was YES. [2024-06-03 18:44:52,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14820 conditions, 2543 events. 1504/2543 cut-off events. For 51582/51584 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14559 event pairs, 727 based on Foata normal form. 1/2543 useless extension candidates. Maximal degree in co-relation 14737. Up to 2294 conditions per place. [2024-06-03 18:44:52,690 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 167 selfloop transitions, 27 changer transitions 0/200 dead transitions. [2024-06-03 18:44:52,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 200 transitions, 2705 flow [2024-06-03 18:44:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:44:52,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:44:52,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-03 18:44:52,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 18:44:52,692 INFO L175 Difference]: Start difference. First operand has 152 places, 183 transitions, 2196 flow. Second operand 6 states and 138 transitions. [2024-06-03 18:44:52,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 200 transitions, 2705 flow [2024-06-03 18:44:52,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 200 transitions, 2627 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 18:44:52,772 INFO L231 Difference]: Finished difference. Result has 155 places, 183 transitions, 2178 flow [2024-06-03 18:44:52,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2178, PETRI_PLACES=155, PETRI_TRANSITIONS=183} [2024-06-03 18:44:52,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-03 18:44:52,773 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 183 transitions, 2178 flow [2024-06-03 18:44:52,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:52,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:52,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:52,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 18:44:52,773 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)] === [2024-06-03 18:44:52,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:52,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1536474596, now seen corresponding path program 3 times [2024-06-03 18:44:52,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:52,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790025629] [2024-06-03 18:44:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:52,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:52,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:52,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790025629] [2024-06-03 18:44:52,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790025629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:52,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:52,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:44:52,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209145734] [2024-06-03 18:44:52,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:52,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:44:52,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:52,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:44:52,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:44:52,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:44:52,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 183 transitions, 2178 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:52,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:52,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:44:52,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:53,209 INFO L124 PetriNetUnfolderBase]: 1443/2468 cut-off events. [2024-06-03 18:44:53,209 INFO L125 PetriNetUnfolderBase]: For 52016/52030 co-relation queries the response was YES. [2024-06-03 18:44:53,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14344 conditions, 2468 events. 1443/2468 cut-off events. For 52016/52030 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14241 event pairs, 407 based on Foata normal form. 6/2454 useless extension candidates. Maximal degree in co-relation 14260. Up to 2069 conditions per place. [2024-06-03 18:44:53,225 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 125 selfloop transitions, 52 changer transitions 0/197 dead transitions. [2024-06-03 18:44:53,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 197 transitions, 2580 flow [2024-06-03 18:44:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:44:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:44:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-03 18:44:53,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-03 18:44:53,226 INFO L175 Difference]: Start difference. First operand has 155 places, 183 transitions, 2178 flow. Second operand 5 states and 124 transitions. [2024-06-03 18:44:53,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 197 transitions, 2580 flow [2024-06-03 18:44:53,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 197 transitions, 2523 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 18:44:53,304 INFO L231 Difference]: Finished difference. Result has 157 places, 183 transitions, 2249 flow [2024-06-03 18:44:53,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2249, PETRI_PLACES=157, PETRI_TRANSITIONS=183} [2024-06-03 18:44:53,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-03 18:44:53,305 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 183 transitions, 2249 flow [2024-06-03 18:44:53,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:53,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:53,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:53,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 18:44:53,305 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)] === [2024-06-03 18:44:53,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:53,305 INFO L85 PathProgramCache]: Analyzing trace with hash -133432892, now seen corresponding path program 1 times [2024-06-03 18:44:53,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:53,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367953033] [2024-06-03 18:44:53,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:53,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:53,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:53,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367953033] [2024-06-03 18:44:53,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367953033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:53,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:53,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:53,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873389867] [2024-06-03 18:44:53,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:53,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:53,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:53,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:53,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:53,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:44:53,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 183 transitions, 2249 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:53,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:53,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:44:53,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:53,771 INFO L124 PetriNetUnfolderBase]: 1429/2429 cut-off events. [2024-06-03 18:44:53,771 INFO L125 PetriNetUnfolderBase]: For 56195/56207 co-relation queries the response was YES. [2024-06-03 18:44:53,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14414 conditions, 2429 events. 1429/2429 cut-off events. For 56195/56207 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14056 event pairs, 704 based on Foata normal form. 12/2430 useless extension candidates. Maximal degree in co-relation 14329. Up to 2162 conditions per place. [2024-06-03 18:44:53,787 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 163 selfloop transitions, 12 changer transitions 0/195 dead transitions. [2024-06-03 18:44:53,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 195 transitions, 2658 flow [2024-06-03 18:44:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:44:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:44:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-03 18:44:53,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-03 18:44:53,794 INFO L175 Difference]: Start difference. First operand has 157 places, 183 transitions, 2249 flow. Second operand 5 states and 113 transitions. [2024-06-03 18:44:53,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 195 transitions, 2658 flow [2024-06-03 18:44:53,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 195 transitions, 2535 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 18:44:53,882 INFO L231 Difference]: Finished difference. Result has 156 places, 185 transitions, 2179 flow [2024-06-03 18:44:53,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2179, PETRI_PLACES=156, PETRI_TRANSITIONS=185} [2024-06-03 18:44:53,883 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-03 18:44:53,883 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 185 transitions, 2179 flow [2024-06-03 18:44:53,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:53,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:53,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:53,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 18:44:53,884 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)] === [2024-06-03 18:44:53,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:53,884 INFO L85 PathProgramCache]: Analyzing trace with hash -965069260, now seen corresponding path program 1 times [2024-06-03 18:44:53,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:53,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955609186] [2024-06-03 18:44:53,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:53,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:54,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:54,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955609186] [2024-06-03 18:44:54,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955609186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:54,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:54,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:54,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667162614] [2024-06-03 18:44:54,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:54,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:54,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:54,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:54,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:54,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:54,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 185 transitions, 2179 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:54,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:54,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:54,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:54,421 INFO L124 PetriNetUnfolderBase]: 1498/2522 cut-off events. [2024-06-03 18:44:54,422 INFO L125 PetriNetUnfolderBase]: For 52706/52717 co-relation queries the response was YES. [2024-06-03 18:44:54,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14760 conditions, 2522 events. 1498/2522 cut-off events. For 52706/52717 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14383 event pairs, 736 based on Foata normal form. 7/2527 useless extension candidates. Maximal degree in co-relation 14676. Up to 2267 conditions per place. [2024-06-03 18:44:54,436 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 162 selfloop transitions, 37 changer transitions 0/205 dead transitions. [2024-06-03 18:44:54,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 205 transitions, 2752 flow [2024-06-03 18:44:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:44:54,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:44:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-03 18:44:54,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-03 18:44:54,437 INFO L175 Difference]: Start difference. First operand has 156 places, 185 transitions, 2179 flow. Second operand 6 states and 134 transitions. [2024-06-03 18:44:54,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 205 transitions, 2752 flow [2024-06-03 18:44:54,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 205 transitions, 2715 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 18:44:54,516 INFO L231 Difference]: Finished difference. Result has 160 places, 190 transitions, 2285 flow [2024-06-03 18:44:54,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2285, PETRI_PLACES=160, PETRI_TRANSITIONS=190} [2024-06-03 18:44:54,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-03 18:44:54,517 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 190 transitions, 2285 flow [2024-06-03 18:44:54,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:54,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:54,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:54,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 18:44:54,517 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)] === [2024-06-03 18:44:54,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:54,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1985404288, now seen corresponding path program 2 times [2024-06-03 18:44:54,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:54,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917294300] [2024-06-03 18:44:54,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:54,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:54,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:54,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917294300] [2024-06-03 18:44:54,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917294300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:54,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:54,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:44:54,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35613694] [2024-06-03 18:44:54,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:54,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:44:54,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:54,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:44:54,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:44:54,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:54,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 190 transitions, 2285 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:54,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:54,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:54,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:55,066 INFO L124 PetriNetUnfolderBase]: 1503/2527 cut-off events. [2024-06-03 18:44:55,067 INFO L125 PetriNetUnfolderBase]: For 55286/55288 co-relation queries the response was YES. [2024-06-03 18:44:55,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14959 conditions, 2527 events. 1503/2527 cut-off events. For 55286/55288 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14373 event pairs, 735 based on Foata normal form. 1/2525 useless extension candidates. Maximal degree in co-relation 14873. Up to 2273 conditions per place. [2024-06-03 18:44:55,088 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 162 selfloop transitions, 45 changer transitions 0/213 dead transitions. [2024-06-03 18:44:55,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 213 transitions, 2945 flow [2024-06-03 18:44:55,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:44:55,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:44:55,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-03 18:44:55,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-03 18:44:55,090 INFO L175 Difference]: Start difference. First operand has 160 places, 190 transitions, 2285 flow. Second operand 9 states and 186 transitions. [2024-06-03 18:44:55,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 213 transitions, 2945 flow [2024-06-03 18:44:55,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 213 transitions, 2818 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 18:44:55,182 INFO L231 Difference]: Finished difference. Result has 167 places, 195 transitions, 2325 flow [2024-06-03 18:44:55,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2325, PETRI_PLACES=167, PETRI_TRANSITIONS=195} [2024-06-03 18:44:55,183 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-03 18:44:55,183 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 195 transitions, 2325 flow [2024-06-03 18:44:55,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:55,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:55,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:55,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 18:44:55,184 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)] === [2024-06-03 18:44:55,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:55,186 INFO L85 PathProgramCache]: Analyzing trace with hash -961350190, now seen corresponding path program 3 times [2024-06-03 18:44:55,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:55,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246226291] [2024-06-03 18:44:55,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:55,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:55,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:55,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246226291] [2024-06-03 18:44:55,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246226291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:55,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:55,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:44:55,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007171354] [2024-06-03 18:44:55,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:55,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:44:55,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:55,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:44:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:44:55,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:55,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 195 transitions, 2325 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:55,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:55,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:55,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:55,758 INFO L124 PetriNetUnfolderBase]: 1500/2523 cut-off events. [2024-06-03 18:44:55,758 INFO L125 PetriNetUnfolderBase]: For 57342/57344 co-relation queries the response was YES. [2024-06-03 18:44:55,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14981 conditions, 2523 events. 1500/2523 cut-off events. For 57342/57344 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14359 event pairs, 735 based on Foata normal form. 1/2521 useless extension candidates. Maximal degree in co-relation 14894. Up to 2270 conditions per place. [2024-06-03 18:44:55,775 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 160 selfloop transitions, 44 changer transitions 0/210 dead transitions. [2024-06-03 18:44:55,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 210 transitions, 2850 flow [2024-06-03 18:44:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-03 18:44:55,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-03 18:44:55,777 INFO L175 Difference]: Start difference. First operand has 167 places, 195 transitions, 2325 flow. Second operand 7 states and 153 transitions. [2024-06-03 18:44:55,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 210 transitions, 2850 flow [2024-06-03 18:44:55,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 210 transitions, 2680 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-03 18:44:55,868 INFO L231 Difference]: Finished difference. Result has 166 places, 195 transitions, 2249 flow [2024-06-03 18:44:55,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2249, PETRI_PLACES=166, PETRI_TRANSITIONS=195} [2024-06-03 18:44:55,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-03 18:44:55,868 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 195 transitions, 2249 flow [2024-06-03 18:44:55,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:55,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:55,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:55,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 18:44:55,869 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)] === [2024-06-03 18:44:55,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:55,869 INFO L85 PathProgramCache]: Analyzing trace with hash 158271778, now seen corresponding path program 4 times [2024-06-03 18:44:55,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:55,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459728733] [2024-06-03 18:44:55,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:55,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:56,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:56,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459728733] [2024-06-03 18:44:56,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459728733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:56,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:56,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:56,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38561169] [2024-06-03 18:44:56,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:56,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:56,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:56,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:56,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:56,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:56,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 195 transitions, 2249 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:56,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:56,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:56,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:56,345 INFO L124 PetriNetUnfolderBase]: 1505/2535 cut-off events. [2024-06-03 18:44:56,345 INFO L125 PetriNetUnfolderBase]: For 59812/59814 co-relation queries the response was YES. [2024-06-03 18:44:56,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14994 conditions, 2535 events. 1505/2535 cut-off events. For 59812/59814 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14446 event pairs, 726 based on Foata normal form. 1/2535 useless extension candidates. Maximal degree in co-relation 14908. Up to 2297 conditions per place. [2024-06-03 18:44:56,363 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 177 selfloop transitions, 30 changer transitions 0/213 dead transitions. [2024-06-03 18:44:56,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 213 transitions, 2810 flow [2024-06-03 18:44:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 18:44:56,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-03 18:44:56,364 INFO L175 Difference]: Start difference. First operand has 166 places, 195 transitions, 2249 flow. Second operand 7 states and 150 transitions. [2024-06-03 18:44:56,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 213 transitions, 2810 flow [2024-06-03 18:44:56,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 213 transitions, 2716 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 18:44:56,453 INFO L231 Difference]: Finished difference. Result has 167 places, 198 transitions, 2250 flow [2024-06-03 18:44:56,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2161, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2250, PETRI_PLACES=167, PETRI_TRANSITIONS=198} [2024-06-03 18:44:56,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-03 18:44:56,454 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 198 transitions, 2250 flow [2024-06-03 18:44:56,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:56,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:56,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:56,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 18:44:56,455 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)] === [2024-06-03 18:44:56,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:56,455 INFO L85 PathProgramCache]: Analyzing trace with hash -386071132, now seen corresponding path program 5 times [2024-06-03 18:44:56,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:56,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583644070] [2024-06-03 18:44:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:56,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:56,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:56,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583644070] [2024-06-03 18:44:56,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583644070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:56,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:56,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:44:56,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035511787] [2024-06-03 18:44:56,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:56,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:44:56,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:56,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:44:56,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:44:56,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:56,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 198 transitions, 2250 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:56,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:56,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:56,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:56,923 INFO L124 PetriNetUnfolderBase]: 1502/2531 cut-off events. [2024-06-03 18:44:56,924 INFO L125 PetriNetUnfolderBase]: For 62192/62194 co-relation queries the response was YES. [2024-06-03 18:44:56,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15003 conditions, 2531 events. 1502/2531 cut-off events. For 62192/62194 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14419 event pairs, 727 based on Foata normal form. 1/2531 useless extension candidates. Maximal degree in co-relation 14916. Up to 2294 conditions per place. [2024-06-03 18:44:56,940 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 30 changer transitions 0/214 dead transitions. [2024-06-03 18:44:56,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 214 transitions, 2729 flow [2024-06-03 18:44:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:44:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:44:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 18:44:56,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-03 18:44:56,941 INFO L175 Difference]: Start difference. First operand has 167 places, 198 transitions, 2250 flow. Second operand 6 states and 137 transitions. [2024-06-03 18:44:56,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 214 transitions, 2729 flow [2024-06-03 18:44:57,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 214 transitions, 2688 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 18:44:57,032 INFO L231 Difference]: Finished difference. Result has 170 places, 198 transitions, 2275 flow [2024-06-03 18:44:57,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2209, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2275, PETRI_PLACES=170, PETRI_TRANSITIONS=198} [2024-06-03 18:44:57,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-03 18:44:57,032 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 198 transitions, 2275 flow [2024-06-03 18:44:57,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:57,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:57,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:57,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 18:44:57,033 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)] === [2024-06-03 18:44:57,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:57,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1829127531, now seen corresponding path program 1 times [2024-06-03 18:44:57,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:57,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773386193] [2024-06-03 18:44:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:57,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:57,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:57,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773386193] [2024-06-03 18:44:57,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773386193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:57,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:57,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:44:57,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289495284] [2024-06-03 18:44:57,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:57,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:44:57,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:57,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:44:57,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:44:57,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:57,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 198 transitions, 2275 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2024-06-03 18:44:57,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:57,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:57,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:57,747 INFO L124 PetriNetUnfolderBase]: 1515/2551 cut-off events. [2024-06-03 18:44:57,748 INFO L125 PetriNetUnfolderBase]: For 65412/65414 co-relation queries the response was YES. [2024-06-03 18:44:57,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15268 conditions, 2551 events. 1515/2551 cut-off events. For 65412/65414 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14465 event pairs, 413 based on Foata normal form. 1/2546 useless extension candidates. Maximal degree in co-relation 15180. Up to 2156 conditions per place. [2024-06-03 18:44:57,772 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 142 selfloop transitions, 73 changer transitions 0/221 dead transitions. [2024-06-03 18:44:57,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 221 transitions, 2907 flow [2024-06-03 18:44:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:57,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 18:44:57,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-03 18:44:57,774 INFO L175 Difference]: Start difference. First operand has 170 places, 198 transitions, 2275 flow. Second operand 7 states and 152 transitions. [2024-06-03 18:44:57,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 221 transitions, 2907 flow [2024-06-03 18:44:57,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 221 transitions, 2826 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 18:44:57,946 INFO L231 Difference]: Finished difference. Result has 172 places, 204 transitions, 2476 flow [2024-06-03 18:44:57,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2194, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2476, PETRI_PLACES=172, PETRI_TRANSITIONS=204} [2024-06-03 18:44:57,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-03 18:44:57,947 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 204 transitions, 2476 flow [2024-06-03 18:44:57,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2024-06-03 18:44:57,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:57,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:57,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 18:44:57,947 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)] === [2024-06-03 18:44:57,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:57,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1536129461, now seen corresponding path program 2 times [2024-06-03 18:44:57,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:57,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400728644] [2024-06-03 18:44:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:57,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:58,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:58,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400728644] [2024-06-03 18:44:58,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400728644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:58,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:58,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:44:58,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504299739] [2024-06-03 18:44:58,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:58,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:44:58,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:58,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:44:58,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:44:58,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:58,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 204 transitions, 2476 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2024-06-03 18:44:58,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:58,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:58,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:58,630 INFO L124 PetriNetUnfolderBase]: 1520/2546 cut-off events. [2024-06-03 18:44:58,630 INFO L125 PetriNetUnfolderBase]: For 71490/71492 co-relation queries the response was YES. [2024-06-03 18:44:58,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15928 conditions, 2546 events. 1520/2546 cut-off events. For 71490/71492 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14429 event pairs, 442 based on Foata normal form. 1/2533 useless extension candidates. Maximal degree in co-relation 15837. Up to 2110 conditions per place. [2024-06-03 18:44:58,655 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 143 selfloop transitions, 82 changer transitions 0/231 dead transitions. [2024-06-03 18:44:58,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 231 transitions, 3262 flow [2024-06-03 18:44:58,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:58,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 18:44:58,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-03 18:44:58,656 INFO L175 Difference]: Start difference. First operand has 172 places, 204 transitions, 2476 flow. Second operand 7 states and 150 transitions. [2024-06-03 18:44:58,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 231 transitions, 3262 flow [2024-06-03 18:44:58,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 231 transitions, 3166 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-03 18:44:58,769 INFO L231 Difference]: Finished difference. Result has 177 places, 213 transitions, 2766 flow [2024-06-03 18:44:58,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2766, PETRI_PLACES=177, PETRI_TRANSITIONS=213} [2024-06-03 18:44:58,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-03 18:44:58,770 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 213 transitions, 2766 flow [2024-06-03 18:44:58,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2024-06-03 18:44:58,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:58,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:58,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 18:44:58,770 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)] === [2024-06-03 18:44:58,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:58,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1535830559, now seen corresponding path program 1 times [2024-06-03 18:44:58,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:58,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117897007] [2024-06-03 18:44:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:58,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:58,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:58,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117897007] [2024-06-03 18:44:58,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117897007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:58,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:58,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:44:58,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744914020] [2024-06-03 18:44:58,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:58,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:44:58,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:58,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:44:58,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:44:58,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:58,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 213 transitions, 2766 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2024-06-03 18:44:58,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:58,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:58,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:59,445 INFO L124 PetriNetUnfolderBase]: 1624/2717 cut-off events. [2024-06-03 18:44:59,446 INFO L125 PetriNetUnfolderBase]: For 78793/78793 co-relation queries the response was YES. [2024-06-03 18:44:59,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17954 conditions, 2717 events. 1624/2717 cut-off events. For 78793/78793 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 15589 event pairs, 563 based on Foata normal form. 1/2711 useless extension candidates. Maximal degree in co-relation 17859. Up to 2266 conditions per place. [2024-06-03 18:44:59,464 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 161 selfloop transitions, 118 changer transitions 0/285 dead transitions. [2024-06-03 18:44:59,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 285 transitions, 4321 flow [2024-06-03 18:44:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:44:59,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:44:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-03 18:44:59,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-03 18:44:59,466 INFO L175 Difference]: Start difference. First operand has 177 places, 213 transitions, 2766 flow. Second operand 10 states and 211 transitions. [2024-06-03 18:44:59,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 285 transitions, 4321 flow [2024-06-03 18:44:59,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 285 transitions, 4200 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-03 18:44:59,620 INFO L231 Difference]: Finished difference. Result has 191 places, 256 transitions, 3631 flow [2024-06-03 18:44:59,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2666, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3631, PETRI_PLACES=191, PETRI_TRANSITIONS=256} [2024-06-03 18:44:59,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-03 18:44:59,621 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 256 transitions, 3631 flow [2024-06-03 18:44:59,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2024-06-03 18:44:59,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:59,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:59,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 18:44:59,621 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)] === [2024-06-03 18:44:59,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:59,622 INFO L85 PathProgramCache]: Analyzing trace with hash 901590739, now seen corresponding path program 3 times [2024-06-03 18:44:59,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:59,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035625393] [2024-06-03 18:44:59,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:59,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:59,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:59,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035625393] [2024-06-03 18:44:59,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035625393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:59,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:59,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:44:59,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635288915] [2024-06-03 18:44:59,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:59,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:44:59,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:59,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:44:59,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:44:59,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:44:59,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 256 transitions, 3631 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2024-06-03 18:44:59,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:59,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:44:59,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:00,224 INFO L124 PetriNetUnfolderBase]: 1629/2716 cut-off events. [2024-06-03 18:45:00,224 INFO L125 PetriNetUnfolderBase]: For 82843/82843 co-relation queries the response was YES. [2024-06-03 18:45:00,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18542 conditions, 2716 events. 1629/2716 cut-off events. For 82843/82843 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 15489 event pairs, 441 based on Foata normal form. 1/2702 useless extension candidates. Maximal degree in co-relation 18438. Up to 2199 conditions per place. [2024-06-03 18:45:00,245 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 167 selfloop transitions, 102 changer transitions 0/275 dead transitions. [2024-06-03 18:45:00,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 275 transitions, 4405 flow [2024-06-03 18:45:00,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:45:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:45:00,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-03 18:45:00,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156794425087108 [2024-06-03 18:45:00,246 INFO L175 Difference]: Start difference. First operand has 191 places, 256 transitions, 3631 flow. Second operand 7 states and 148 transitions. [2024-06-03 18:45:00,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 275 transitions, 4405 flow [2024-06-03 18:45:00,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 275 transitions, 4319 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-03 18:45:00,447 INFO L231 Difference]: Finished difference. Result has 197 places, 259 transitions, 3798 flow [2024-06-03 18:45:00,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3551, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3798, PETRI_PLACES=197, PETRI_TRANSITIONS=259} [2024-06-03 18:45:00,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-03 18:45:00,448 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 259 transitions, 3798 flow [2024-06-03 18:45:00,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2024-06-03 18:45:00,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:00,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:00,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 18:45:00,449 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)] === [2024-06-03 18:45:00,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:00,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1008200607, now seen corresponding path program 2 times [2024-06-03 18:45:00,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:00,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243737989] [2024-06-03 18:45:00,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:00,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:00,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:00,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243737989] [2024-06-03 18:45:00,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243737989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:00,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:00,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:45:00,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787919554] [2024-06-03 18:45:00,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:00,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:45:00,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:00,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:45:00,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:45:00,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:00,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 259 transitions, 3798 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2024-06-03 18:45:00,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:00,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:00,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:01,110 INFO L124 PetriNetUnfolderBase]: 1673/2798 cut-off events. [2024-06-03 18:45:01,110 INFO L125 PetriNetUnfolderBase]: For 85575/85575 co-relation queries the response was YES. [2024-06-03 18:45:01,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19348 conditions, 2798 events. 1673/2798 cut-off events. For 85575/85575 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16050 event pairs, 398 based on Foata normal form. 2/2797 useless extension candidates. Maximal degree in co-relation 19241. Up to 2427 conditions per place. [2024-06-03 18:45:01,133 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 209 selfloop transitions, 87 changer transitions 0/302 dead transitions. [2024-06-03 18:45:01,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 302 transitions, 4954 flow [2024-06-03 18:45:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:45:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:45:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 18:45:01,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2024-06-03 18:45:01,134 INFO L175 Difference]: Start difference. First operand has 197 places, 259 transitions, 3798 flow. Second operand 10 states and 207 transitions. [2024-06-03 18:45:01,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 302 transitions, 4954 flow [2024-06-03 18:45:01,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 302 transitions, 4759 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 18:45:01,327 INFO L231 Difference]: Finished difference. Result has 205 places, 281 transitions, 4209 flow [2024-06-03 18:45:01,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3612, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4209, PETRI_PLACES=205, PETRI_TRANSITIONS=281} [2024-06-03 18:45:01,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-03 18:45:01,328 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 281 transitions, 4209 flow [2024-06-03 18:45:01,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2024-06-03 18:45:01,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:01,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:01,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 18:45:01,328 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)] === [2024-06-03 18:45:01,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:01,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1078722259, now seen corresponding path program 4 times [2024-06-03 18:45:01,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:01,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071497302] [2024-06-03 18:45:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:01,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:01,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:01,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071497302] [2024-06-03 18:45:01,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071497302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:01,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:01,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:45:01,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99148002] [2024-06-03 18:45:01,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:01,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:45:01,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:01,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:45:01,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:45:01,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:01,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 281 transitions, 4209 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2024-06-03 18:45:01,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:01,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:01,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:01,990 INFO L124 PetriNetUnfolderBase]: 1678/2807 cut-off events. [2024-06-03 18:45:01,991 INFO L125 PetriNetUnfolderBase]: For 90744/90744 co-relation queries the response was YES. [2024-06-03 18:45:02,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19929 conditions, 2807 events. 1678/2807 cut-off events. For 90744/90744 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16061 event pairs, 404 based on Foata normal form. 1/2802 useless extension candidates. Maximal degree in co-relation 19819. Up to 2470 conditions per place. [2024-06-03 18:45:02,012 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 232 selfloop transitions, 58 changer transitions 0/296 dead transitions. [2024-06-03 18:45:02,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 296 transitions, 4950 flow [2024-06-03 18:45:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:45:02,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:45:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 18:45:02,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-03 18:45:02,013 INFO L175 Difference]: Start difference. First operand has 205 places, 281 transitions, 4209 flow. Second operand 8 states and 159 transitions. [2024-06-03 18:45:02,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 296 transitions, 4950 flow [2024-06-03 18:45:02,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 296 transitions, 4783 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-03 18:45:02,239 INFO L231 Difference]: Finished difference. Result has 209 places, 284 transitions, 4246 flow [2024-06-03 18:45:02,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4044, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4246, PETRI_PLACES=209, PETRI_TRANSITIONS=284} [2024-06-03 18:45:02,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-03 18:45:02,240 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 284 transitions, 4246 flow [2024-06-03 18:45:02,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2024-06-03 18:45:02,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:02,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:02,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 18:45:02,241 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)] === [2024-06-03 18:45:02,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:02,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1890979193, now seen corresponding path program 3 times [2024-06-03 18:45:02,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:02,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170110384] [2024-06-03 18:45:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:02,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:02,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:02,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170110384] [2024-06-03 18:45:02,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170110384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:02,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:02,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:45:02,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421147991] [2024-06-03 18:45:02,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:02,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:45:02,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:02,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:45:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:45:02,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:02,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 284 transitions, 4246 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2024-06-03 18:45:02,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:02,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:02,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:02,979 INFO L124 PetriNetUnfolderBase]: 1672/2799 cut-off events. [2024-06-03 18:45:02,979 INFO L125 PetriNetUnfolderBase]: For 89340/89340 co-relation queries the response was YES. [2024-06-03 18:45:02,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19780 conditions, 2799 events. 1672/2799 cut-off events. For 89340/89340 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16062 event pairs, 398 based on Foata normal form. 2/2798 useless extension candidates. Maximal degree in co-relation 19668. Up to 2430 conditions per place. [2024-06-03 18:45:03,002 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 214 selfloop transitions, 84 changer transitions 0/304 dead transitions. [2024-06-03 18:45:03,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 304 transitions, 5000 flow [2024-06-03 18:45:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:45:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:45:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-03 18:45:03,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-03 18:45:03,004 INFO L175 Difference]: Start difference. First operand has 209 places, 284 transitions, 4246 flow. Second operand 10 states and 206 transitions. [2024-06-03 18:45:03,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 304 transitions, 5000 flow [2024-06-03 18:45:03,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 304 transitions, 4795 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-03 18:45:03,296 INFO L231 Difference]: Finished difference. Result has 214 places, 285 transitions, 4263 flow [2024-06-03 18:45:03,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4042, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4263, PETRI_PLACES=214, PETRI_TRANSITIONS=285} [2024-06-03 18:45:03,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-03 18:45:03,297 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 285 transitions, 4263 flow [2024-06-03 18:45:03,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 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) [2024-06-03 18:45:03,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:03,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:03,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 18:45:03,298 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)] === [2024-06-03 18:45:03,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:03,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1078968709, now seen corresponding path program 1 times [2024-06-03 18:45:03,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:03,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384966014] [2024-06-03 18:45:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:03,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:03,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:03,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384966014] [2024-06-03 18:45:03,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384966014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:03,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:03,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:45:03,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133158532] [2024-06-03 18:45:03,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:03,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:45:03,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:03,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:45:03,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:45:03,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:03,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 285 transitions, 4263 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:03,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:03,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:03,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:03,998 INFO L124 PetriNetUnfolderBase]: 1654/2797 cut-off events. [2024-06-03 18:45:03,999 INFO L125 PetriNetUnfolderBase]: For 99135/99136 co-relation queries the response was YES. [2024-06-03 18:45:04,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19736 conditions, 2797 events. 1654/2797 cut-off events. For 99135/99136 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16346 event pairs, 396 based on Foata normal form. 10/2795 useless extension candidates. Maximal degree in co-relation 19623. Up to 2332 conditions per place. [2024-06-03 18:45:04,024 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 222 selfloop transitions, 45 changer transitions 0/304 dead transitions. [2024-06-03 18:45:04,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 304 transitions, 4887 flow [2024-06-03 18:45:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:45:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:45:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 18:45:04,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-03 18:45:04,028 INFO L175 Difference]: Start difference. First operand has 214 places, 285 transitions, 4263 flow. Second operand 8 states and 170 transitions. [2024-06-03 18:45:04,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 304 transitions, 4887 flow [2024-06-03 18:45:04,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 304 transitions, 4748 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 18:45:04,230 INFO L231 Difference]: Finished difference. Result has 215 places, 286 transitions, 4239 flow [2024-06-03 18:45:04,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4239, PETRI_PLACES=215, PETRI_TRANSITIONS=286} [2024-06-03 18:45:04,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-03 18:45:04,231 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 286 transitions, 4239 flow [2024-06-03 18:45:04,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:04,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:04,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:04,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 18:45:04,232 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)] === [2024-06-03 18:45:04,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:04,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1709550895, now seen corresponding path program 4 times [2024-06-03 18:45:04,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:04,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782678499] [2024-06-03 18:45:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:04,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:04,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:04,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782678499] [2024-06-03 18:45:04,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782678499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:04,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:04,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:04,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244413887] [2024-06-03 18:45:04,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:04,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:04,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:04,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:04,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:04,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:04,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 286 transitions, 4239 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:04,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:04,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:04,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:04,886 INFO L124 PetriNetUnfolderBase]: 1710/2858 cut-off events. [2024-06-03 18:45:04,886 INFO L125 PetriNetUnfolderBase]: For 95089/95094 co-relation queries the response was YES. [2024-06-03 18:45:04,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20114 conditions, 2858 events. 1710/2858 cut-off events. For 95089/95094 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 16608 event pairs, 586 based on Foata normal form. 6/2856 useless extension candidates. Maximal degree in co-relation 20001. Up to 2388 conditions per place. [2024-06-03 18:45:04,913 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 127 changer transitions 0/312 dead transitions. [2024-06-03 18:45:04,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 312 transitions, 5180 flow [2024-06-03 18:45:04,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:45:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:45:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 18:45:04,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-03 18:45:04,914 INFO L175 Difference]: Start difference. First operand has 215 places, 286 transitions, 4239 flow. Second operand 8 states and 174 transitions. [2024-06-03 18:45:04,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 312 transitions, 5180 flow [2024-06-03 18:45:05,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 312 transitions, 5093 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 18:45:05,139 INFO L231 Difference]: Finished difference. Result has 218 places, 295 transitions, 4598 flow [2024-06-03 18:45:05,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4154, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4598, PETRI_PLACES=218, PETRI_TRANSITIONS=295} [2024-06-03 18:45:05,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-03 18:45:05,140 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 295 transitions, 4598 flow [2024-06-03 18:45:05,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:05,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:05,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:05,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 18:45:05,140 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)] === [2024-06-03 18:45:05,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:05,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1859933875, now seen corresponding path program 5 times [2024-06-03 18:45:05,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:05,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364245621] [2024-06-03 18:45:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:05,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:05,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:05,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364245621] [2024-06-03 18:45:05,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364245621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:05,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:05,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:05,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264987036] [2024-06-03 18:45:05,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:05,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:05,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:05,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:05,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:05,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:05,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 295 transitions, 4598 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:05,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:05,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:05,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:05,775 INFO L124 PetriNetUnfolderBase]: 1798/2998 cut-off events. [2024-06-03 18:45:05,775 INFO L125 PetriNetUnfolderBase]: For 104234/104234 co-relation queries the response was YES. [2024-06-03 18:45:05,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22042 conditions, 2998 events. 1798/2998 cut-off events. For 104234/104234 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 17361 event pairs, 413 based on Foata normal form. 2/2994 useless extension candidates. Maximal degree in co-relation 21928. Up to 2487 conditions per place. [2024-06-03 18:45:05,801 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 214 selfloop transitions, 130 changer transitions 0/350 dead transitions. [2024-06-03 18:45:05,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 350 transitions, 6211 flow [2024-06-03 18:45:05,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:45:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:45:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 18:45:05,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-03 18:45:05,803 INFO L175 Difference]: Start difference. First operand has 218 places, 295 transitions, 4598 flow. Second operand 7 states and 165 transitions. [2024-06-03 18:45:05,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 350 transitions, 6211 flow [2024-06-03 18:45:06,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 350 transitions, 6050 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-03 18:45:06,052 INFO L231 Difference]: Finished difference. Result has 224 places, 327 transitions, 5527 flow [2024-06-03 18:45:06,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5527, PETRI_PLACES=224, PETRI_TRANSITIONS=327} [2024-06-03 18:45:06,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-03 18:45:06,053 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 327 transitions, 5527 flow [2024-06-03 18:45:06,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:06,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:06,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:06,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 18:45:06,053 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)] === [2024-06-03 18:45:06,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:06,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1859696725, now seen corresponding path program 6 times [2024-06-03 18:45:06,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:06,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992189615] [2024-06-03 18:45:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:06,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:06,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:06,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992189615] [2024-06-03 18:45:06,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992189615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:06,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:06,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:06,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678312168] [2024-06-03 18:45:06,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:06,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:06,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:06,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:06,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:06,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:06,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 327 transitions, 5527 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:06,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:06,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:06,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:06,668 INFO L124 PetriNetUnfolderBase]: 1792/2986 cut-off events. [2024-06-03 18:45:06,668 INFO L125 PetriNetUnfolderBase]: For 109959/109959 co-relation queries the response was YES. [2024-06-03 18:45:06,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22865 conditions, 2986 events. 1792/2986 cut-off events. For 109959/109959 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 17263 event pairs, 413 based on Foata normal form. 2/2982 useless extension candidates. Maximal degree in co-relation 22747. Up to 2483 conditions per place. [2024-06-03 18:45:06,696 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 121 changer transitions 0/345 dead transitions. [2024-06-03 18:45:06,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 345 transitions, 6389 flow [2024-06-03 18:45:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:45:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:45:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-03 18:45:06,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-03 18:45:06,697 INFO L175 Difference]: Start difference. First operand has 224 places, 327 transitions, 5527 flow. Second operand 7 states and 160 transitions. [2024-06-03 18:45:06,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 345 transitions, 6389 flow [2024-06-03 18:45:06,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 345 transitions, 6221 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-03 18:45:06,977 INFO L231 Difference]: Finished difference. Result has 229 places, 328 transitions, 5709 flow [2024-06-03 18:45:06,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5361, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5709, PETRI_PLACES=229, PETRI_TRANSITIONS=328} [2024-06-03 18:45:06,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-03 18:45:06,978 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 328 transitions, 5709 flow [2024-06-03 18:45:06,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:06,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:06,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:06,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 18:45:06,979 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)] === [2024-06-03 18:45:06,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:06,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1793720645, now seen corresponding path program 2 times [2024-06-03 18:45:06,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:06,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356559255] [2024-06-03 18:45:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:06,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:07,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:07,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356559255] [2024-06-03 18:45:07,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356559255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:07,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:07,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:07,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149090606] [2024-06-03 18:45:07,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:07,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:07,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:07,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:07,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:07,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:45:07,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 328 transitions, 5709 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:07,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:07,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:45:07,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:07,611 INFO L124 PetriNetUnfolderBase]: 1757/2966 cut-off events. [2024-06-03 18:45:07,611 INFO L125 PetriNetUnfolderBase]: For 115644/115645 co-relation queries the response was YES. [2024-06-03 18:45:07,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22673 conditions, 2966 events. 1757/2966 cut-off events. For 115644/115645 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 17576 event pairs, 413 based on Foata normal form. 10/2958 useless extension candidates. Maximal degree in co-relation 22553. Up to 2426 conditions per place. [2024-06-03 18:45:07,649 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 255 selfloop transitions, 37 changer transitions 0/341 dead transitions. [2024-06-03 18:45:07,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 341 transitions, 6369 flow [2024-06-03 18:45:07,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:45:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:45:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-03 18:45:07,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-03 18:45:07,651 INFO L175 Difference]: Start difference. First operand has 229 places, 328 transitions, 5709 flow. Second operand 5 states and 118 transitions. [2024-06-03 18:45:07,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 341 transitions, 6369 flow [2024-06-03 18:45:07,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 341 transitions, 6197 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 18:45:07,957 INFO L231 Difference]: Finished difference. Result has 230 places, 329 transitions, 5642 flow [2024-06-03 18:45:07,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5537, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5642, PETRI_PLACES=230, PETRI_TRANSITIONS=329} [2024-06-03 18:45:07,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-03 18:45:07,958 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 329 transitions, 5642 flow [2024-06-03 18:45:07,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:07,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:07,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:07,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 18:45:07,959 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)] === [2024-06-03 18:45:07,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:07,959 INFO L85 PathProgramCache]: Analyzing trace with hash 835068725, now seen corresponding path program 7 times [2024-06-03 18:45:07,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:07,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789288193] [2024-06-03 18:45:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:07,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:08,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:08,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789288193] [2024-06-03 18:45:08,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789288193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:08,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:08,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:08,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189827329] [2024-06-03 18:45:08,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:08,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:08,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:08,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:08,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:08,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:08,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 329 transitions, 5642 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:08,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:08,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:08,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:08,518 INFO L124 PetriNetUnfolderBase]: 1833/3052 cut-off events. [2024-06-03 18:45:08,518 INFO L125 PetriNetUnfolderBase]: For 111815/111820 co-relation queries the response was YES. [2024-06-03 18:45:08,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23279 conditions, 3052 events. 1833/3052 cut-off events. For 111815/111820 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17816 event pairs, 608 based on Foata normal form. 5/3044 useless extension candidates. Maximal degree in co-relation 23159. Up to 2492 conditions per place. [2024-06-03 18:45:08,545 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 214 selfloop transitions, 136 changer transitions 0/356 dead transitions. [2024-06-03 18:45:08,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 356 transitions, 6709 flow [2024-06-03 18:45:08,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:45:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:45:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-03 18:45:08,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-03 18:45:08,546 INFO L175 Difference]: Start difference. First operand has 230 places, 329 transitions, 5642 flow. Second operand 7 states and 156 transitions. [2024-06-03 18:45:08,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 356 transitions, 6709 flow [2024-06-03 18:45:08,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 356 transitions, 6636 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 18:45:08,796 INFO L231 Difference]: Finished difference. Result has 235 places, 340 transitions, 6108 flow [2024-06-03 18:45:08,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5573, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6108, PETRI_PLACES=235, PETRI_TRANSITIONS=340} [2024-06-03 18:45:08,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-03 18:45:08,797 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 340 transitions, 6108 flow [2024-06-03 18:45:08,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:08,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:08,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:08,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 18:45:08,797 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)] === [2024-06-03 18:45:08,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:08,798 INFO L85 PathProgramCache]: Analyzing trace with hash 922911493, now seen corresponding path program 8 times [2024-06-03 18:45:08,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:08,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557347709] [2024-06-03 18:45:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:08,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:08,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:08,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557347709] [2024-06-03 18:45:08,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557347709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:08,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:08,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:08,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040845463] [2024-06-03 18:45:08,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:08,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:08,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:08,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:08,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:08,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:08,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 340 transitions, 6108 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:08,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:08,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:08,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:09,458 INFO L124 PetriNetUnfolderBase]: 1867/3111 cut-off events. [2024-06-03 18:45:09,459 INFO L125 PetriNetUnfolderBase]: For 116848/116848 co-relation queries the response was YES. [2024-06-03 18:45:09,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24526 conditions, 3111 events. 1867/3111 cut-off events. For 116848/116848 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18141 event pairs, 421 based on Foata normal form. 2/3107 useless extension candidates. Maximal degree in co-relation 24404. Up to 2511 conditions per place. [2024-06-03 18:45:09,490 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 220 selfloop transitions, 149 changer transitions 0/375 dead transitions. [2024-06-03 18:45:09,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 375 transitions, 7374 flow [2024-06-03 18:45:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:45:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:45:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-03 18:45:09,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-03 18:45:09,491 INFO L175 Difference]: Start difference. First operand has 235 places, 340 transitions, 6108 flow. Second operand 9 states and 197 transitions. [2024-06-03 18:45:09,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 375 transitions, 7374 flow [2024-06-03 18:45:09,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 375 transitions, 7293 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-03 18:45:09,833 INFO L231 Difference]: Finished difference. Result has 244 places, 355 transitions, 6704 flow [2024-06-03 18:45:09,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6031, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6704, PETRI_PLACES=244, PETRI_TRANSITIONS=355} [2024-06-03 18:45:09,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-03 18:45:09,834 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 355 transitions, 6704 flow [2024-06-03 18:45:09,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:09,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:09,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:09,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 18:45:09,835 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)] === [2024-06-03 18:45:09,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:09,835 INFO L85 PathProgramCache]: Analyzing trace with hash 383133959, now seen corresponding path program 9 times [2024-06-03 18:45:09,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:09,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303970033] [2024-06-03 18:45:09,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:09,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:09,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:09,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303970033] [2024-06-03 18:45:09,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303970033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:09,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:09,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:09,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623902942] [2024-06-03 18:45:09,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:09,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:09,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:09,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:09,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:10,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:10,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 355 transitions, 6704 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:10,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:10,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:10,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:10,632 INFO L124 PetriNetUnfolderBase]: 1864/3108 cut-off events. [2024-06-03 18:45:10,632 INFO L125 PetriNetUnfolderBase]: For 124309/124309 co-relation queries the response was YES. [2024-06-03 18:45:10,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25373 conditions, 3108 events. 1864/3108 cut-off events. For 124309/124309 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18132 event pairs, 417 based on Foata normal form. 1/3103 useless extension candidates. Maximal degree in co-relation 25246. Up to 2637 conditions per place. [2024-06-03 18:45:10,665 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 90 changer transitions 0/375 dead transitions. [2024-06-03 18:45:10,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 375 transitions, 7520 flow [2024-06-03 18:45:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:45:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:45:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 18:45:10,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 18:45:10,666 INFO L175 Difference]: Start difference. First operand has 244 places, 355 transitions, 6704 flow. Second operand 7 states and 161 transitions. [2024-06-03 18:45:10,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 375 transitions, 7520 flow [2024-06-03 18:45:10,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 375 transitions, 7236 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-03 18:45:10,933 INFO L231 Difference]: Finished difference. Result has 247 places, 355 transitions, 6606 flow [2024-06-03 18:45:10,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6420, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6606, PETRI_PLACES=247, PETRI_TRANSITIONS=355} [2024-06-03 18:45:10,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-03 18:45:10,934 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 355 transitions, 6606 flow [2024-06-03 18:45:10,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:10,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:10,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:10,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 18:45:10,934 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)] === [2024-06-03 18:45:10,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash 383549669, now seen corresponding path program 10 times [2024-06-03 18:45:10,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:10,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176283002] [2024-06-03 18:45:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:10,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:11,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:11,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176283002] [2024-06-03 18:45:11,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176283002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:11,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:11,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:11,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234573048] [2024-06-03 18:45:11,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:11,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:11,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:11,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:11,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:11,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:11,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 355 transitions, 6606 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:11,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:11,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:11,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:11,573 INFO L124 PetriNetUnfolderBase]: 1869/3107 cut-off events. [2024-06-03 18:45:11,573 INFO L125 PetriNetUnfolderBase]: For 127978/127978 co-relation queries the response was YES. [2024-06-03 18:45:11,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25560 conditions, 3107 events. 1869/3107 cut-off events. For 127978/127978 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18052 event pairs, 424 based on Foata normal form. 1/3102 useless extension candidates. Maximal degree in co-relation 25431. Up to 2513 conditions per place. [2024-06-03 18:45:11,602 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 214 selfloop transitions, 160 changer transitions 0/380 dead transitions. [2024-06-03 18:45:11,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 380 transitions, 7693 flow [2024-06-03 18:45:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:45:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:45:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 18:45:11,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 18:45:11,603 INFO L175 Difference]: Start difference. First operand has 247 places, 355 transitions, 6606 flow. Second operand 7 states and 164 transitions. [2024-06-03 18:45:11,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 380 transitions, 7693 flow [2024-06-03 18:45:11,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 380 transitions, 7416 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 18:45:11,865 INFO L231 Difference]: Finished difference. Result has 249 places, 358 transitions, 6710 flow [2024-06-03 18:45:11,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6329, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6710, PETRI_PLACES=249, PETRI_TRANSITIONS=358} [2024-06-03 18:45:11,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-03 18:45:11,866 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 358 transitions, 6710 flow [2024-06-03 18:45:11,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:11,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:11,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:11,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 18:45:11,867 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)] === [2024-06-03 18:45:11,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:11,867 INFO L85 PathProgramCache]: Analyzing trace with hash -730211461, now seen corresponding path program 11 times [2024-06-03 18:45:11,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:11,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963734464] [2024-06-03 18:45:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:11,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:11,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:11,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963734464] [2024-06-03 18:45:11,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963734464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:11,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:11,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:11,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610694230] [2024-06-03 18:45:11,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:11,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:11,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:11,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:11,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:12,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:12,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 358 transitions, 6710 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:12,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:12,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:12,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:12,515 INFO L124 PetriNetUnfolderBase]: 1866/3108 cut-off events. [2024-06-03 18:45:12,515 INFO L125 PetriNetUnfolderBase]: For 131271/131271 co-relation queries the response was YES. [2024-06-03 18:45:12,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25584 conditions, 3108 events. 1866/3108 cut-off events. For 131271/131271 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18129 event pairs, 420 based on Foata normal form. 1/3103 useless extension candidates. Maximal degree in co-relation 25455. Up to 2511 conditions per place. [2024-06-03 18:45:12,545 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 217 selfloop transitions, 153 changer transitions 0/376 dead transitions. [2024-06-03 18:45:12,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 376 transitions, 7631 flow [2024-06-03 18:45:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:45:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:45:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 18:45:12,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-03 18:45:12,546 INFO L175 Difference]: Start difference. First operand has 249 places, 358 transitions, 6710 flow. Second operand 8 states and 177 transitions. [2024-06-03 18:45:12,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 376 transitions, 7631 flow [2024-06-03 18:45:12,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 376 transitions, 7411 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-03 18:45:12,794 INFO L231 Difference]: Finished difference. Result has 254 places, 358 transitions, 6802 flow [2024-06-03 18:45:12,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6490, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6802, PETRI_PLACES=254, PETRI_TRANSITIONS=358} [2024-06-03 18:45:12,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-03 18:45:12,795 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 358 transitions, 6802 flow [2024-06-03 18:45:12,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:12,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:12,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:12,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 18:45:12,796 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)] === [2024-06-03 18:45:12,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:12,796 INFO L85 PathProgramCache]: Analyzing trace with hash 605745827, now seen corresponding path program 3 times [2024-06-03 18:45:12,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:12,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259634996] [2024-06-03 18:45:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:12,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:12,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:12,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259634996] [2024-06-03 18:45:12,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259634996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:12,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:12,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:12,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025241709] [2024-06-03 18:45:12,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:12,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:12,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:12,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:12,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:12,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:45:12,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 358 transitions, 6802 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:12,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:12,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:45:12,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:13,418 INFO L124 PetriNetUnfolderBase]: 1837/3089 cut-off events. [2024-06-03 18:45:13,418 INFO L125 PetriNetUnfolderBase]: For 145169/145170 co-relation queries the response was YES. [2024-06-03 18:45:13,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25401 conditions, 3089 events. 1837/3089 cut-off events. For 145169/145170 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18328 event pairs, 420 based on Foata normal form. 10/3083 useless extension candidates. Maximal degree in co-relation 25271. Up to 2570 conditions per place. [2024-06-03 18:45:13,449 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 277 selfloop transitions, 39 changer transitions 0/372 dead transitions. [2024-06-03 18:45:13,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 372 transitions, 7518 flow [2024-06-03 18:45:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:45:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:45:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-03 18:45:13,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 18:45:13,450 INFO L175 Difference]: Start difference. First operand has 254 places, 358 transitions, 6802 flow. Second operand 6 states and 135 transitions. [2024-06-03 18:45:13,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 372 transitions, 7518 flow [2024-06-03 18:45:13,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 372 transitions, 7181 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 18:45:13,714 INFO L231 Difference]: Finished difference. Result has 254 places, 359 transitions, 6567 flow [2024-06-03 18:45:13,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6465, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6567, PETRI_PLACES=254, PETRI_TRANSITIONS=359} [2024-06-03 18:45:13,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-03 18:45:13,714 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 359 transitions, 6567 flow [2024-06-03 18:45:13,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:13,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:13,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:13,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 18:45:13,715 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)] === [2024-06-03 18:45:13,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:13,715 INFO L85 PathProgramCache]: Analyzing trace with hash 620030627, now seen corresponding path program 4 times [2024-06-03 18:45:13,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:13,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499275366] [2024-06-03 18:45:13,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:13,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:13,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:13,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499275366] [2024-06-03 18:45:13,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499275366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:13,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:13,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:13,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700413782] [2024-06-03 18:45:13,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:13,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:13,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:13,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:13,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:13,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:45:13,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 359 transitions, 6567 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:13,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:13,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:45:13,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:14,351 INFO L124 PetriNetUnfolderBase]: 1838/3091 cut-off events. [2024-06-03 18:45:14,351 INFO L125 PetriNetUnfolderBase]: For 142626/142627 co-relation queries the response was YES. [2024-06-03 18:45:14,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25078 conditions, 3091 events. 1838/3091 cut-off events. For 142626/142627 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18324 event pairs, 411 based on Foata normal form. 8/3083 useless extension candidates. Maximal degree in co-relation 24947. Up to 2471 conditions per place. [2024-06-03 18:45:14,459 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 277 selfloop transitions, 43 changer transitions 0/376 dead transitions. [2024-06-03 18:45:14,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 376 transitions, 7315 flow [2024-06-03 18:45:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:45:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:45:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 18:45:14,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-03 18:45:14,460 INFO L175 Difference]: Start difference. First operand has 254 places, 359 transitions, 6567 flow. Second operand 6 states and 137 transitions. [2024-06-03 18:45:14,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 376 transitions, 7315 flow [2024-06-03 18:45:14,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 376 transitions, 7225 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 18:45:14,756 INFO L231 Difference]: Finished difference. Result has 256 places, 360 transitions, 6587 flow [2024-06-03 18:45:14,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6587, PETRI_PLACES=256, PETRI_TRANSITIONS=360} [2024-06-03 18:45:14,756 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-03 18:45:14,756 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 360 transitions, 6587 flow [2024-06-03 18:45:14,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:14,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:14,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:14,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 18:45:14,757 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)] === [2024-06-03 18:45:14,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:14,757 INFO L85 PathProgramCache]: Analyzing trace with hash 716750777, now seen corresponding path program 1 times [2024-06-03 18:45:14,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:14,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722519481] [2024-06-03 18:45:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:14,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:14,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:14,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722519481] [2024-06-03 18:45:14,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722519481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:14,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:14,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:45:14,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112385945] [2024-06-03 18:45:14,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:14,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:45:14,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:14,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:45:14,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:45:14,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:45:14,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 360 transitions, 6587 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) [2024-06-03 18:45:14,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:14,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:45:14,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:15,418 INFO L124 PetriNetUnfolderBase]: 1863/3137 cut-off events. [2024-06-03 18:45:15,418 INFO L125 PetriNetUnfolderBase]: For 147143/147187 co-relation queries the response was YES. [2024-06-03 18:45:15,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25520 conditions, 3137 events. 1863/3137 cut-off events. For 147143/147187 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 18731 event pairs, 546 based on Foata normal form. 28/3135 useless extension candidates. Maximal degree in co-relation 25388. Up to 2512 conditions per place. [2024-06-03 18:45:15,451 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 270 selfloop transitions, 86 changer transitions 0/384 dead transitions. [2024-06-03 18:45:15,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 384 transitions, 7518 flow [2024-06-03 18:45:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:45:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:45:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 18:45:15,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-03 18:45:15,452 INFO L175 Difference]: Start difference. First operand has 256 places, 360 transitions, 6587 flow. Second operand 6 states and 141 transitions. [2024-06-03 18:45:15,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 384 transitions, 7518 flow [2024-06-03 18:45:15,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 384 transitions, 7424 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 18:45:15,763 INFO L231 Difference]: Finished difference. Result has 258 places, 364 transitions, 6727 flow [2024-06-03 18:45:15,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6493, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6727, PETRI_PLACES=258, PETRI_TRANSITIONS=364} [2024-06-03 18:45:15,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-03 18:45:15,764 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 364 transitions, 6727 flow [2024-06-03 18:45:15,765 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) [2024-06-03 18:45:15,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:15,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:15,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 18:45:15,765 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)] === [2024-06-03 18:45:15,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:15,766 INFO L85 PathProgramCache]: Analyzing trace with hash 408908555, now seen corresponding path program 2 times [2024-06-03 18:45:15,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:15,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487960242] [2024-06-03 18:45:15,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:15,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:15,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:15,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487960242] [2024-06-03 18:45:15,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487960242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:15,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:15,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:45:15,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770635074] [2024-06-03 18:45:15,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:15,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:45:15,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:15,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:45:15,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:45:15,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:45:15,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 364 transitions, 6727 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) [2024-06-03 18:45:15,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:15,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:45:15,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:16,463 INFO L124 PetriNetUnfolderBase]: 1880/3167 cut-off events. [2024-06-03 18:45:16,463 INFO L125 PetriNetUnfolderBase]: For 150970/151017 co-relation queries the response was YES. [2024-06-03 18:45:16,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25894 conditions, 3167 events. 1880/3167 cut-off events. For 150970/151017 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 18870 event pairs, 422 based on Foata normal form. 30/3167 useless extension candidates. Maximal degree in co-relation 25761. Up to 2655 conditions per place. [2024-06-03 18:45:16,496 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 273 selfloop transitions, 79 changer transitions 0/380 dead transitions. [2024-06-03 18:45:16,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 380 transitions, 7512 flow [2024-06-03 18:45:16,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:45:16,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:45:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-03 18:45:16,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-03 18:45:16,497 INFO L175 Difference]: Start difference. First operand has 258 places, 364 transitions, 6727 flow. Second operand 6 states and 136 transitions. [2024-06-03 18:45:16,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 380 transitions, 7512 flow [2024-06-03 18:45:16,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 380 transitions, 7341 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-03 18:45:16,867 INFO L231 Difference]: Finished difference. Result has 261 places, 366 transitions, 6755 flow [2024-06-03 18:45:16,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6568, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6755, PETRI_PLACES=261, PETRI_TRANSITIONS=366} [2024-06-03 18:45:16,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-03 18:45:16,868 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 366 transitions, 6755 flow [2024-06-03 18:45:16,868 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) [2024-06-03 18:45:16,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:16,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:16,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 18:45:16,869 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)] === [2024-06-03 18:45:16,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:16,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1418167605, now seen corresponding path program 3 times [2024-06-03 18:45:16,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:16,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296533112] [2024-06-03 18:45:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:16,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:16,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:16,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296533112] [2024-06-03 18:45:16,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296533112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:16,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:16,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:16,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993457624] [2024-06-03 18:45:16,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:16,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:16,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:16,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:16,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:17,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:45:17,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 366 transitions, 6755 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:17,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:17,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:45:17,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:17,538 INFO L124 PetriNetUnfolderBase]: 1874/3144 cut-off events. [2024-06-03 18:45:17,539 INFO L125 PetriNetUnfolderBase]: For 150769/150804 co-relation queries the response was YES. [2024-06-03 18:45:17,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25768 conditions, 3144 events. 1874/3144 cut-off events. For 150769/150804 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 18659 event pairs, 420 based on Foata normal form. 22/3133 useless extension candidates. Maximal degree in co-relation 25634. Up to 2649 conditions per place. [2024-06-03 18:45:17,571 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 267 selfloop transitions, 86 changer transitions 0/381 dead transitions. [2024-06-03 18:45:17,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 381 transitions, 7514 flow [2024-06-03 18:45:17,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:45:17,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:45:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 18:45:17,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:45:17,573 INFO L175 Difference]: Start difference. First operand has 261 places, 366 transitions, 6755 flow. Second operand 7 states and 154 transitions. [2024-06-03 18:45:17,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 381 transitions, 7514 flow [2024-06-03 18:45:17,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 381 transitions, 7351 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 18:45:17,883 INFO L231 Difference]: Finished difference. Result has 264 places, 366 transitions, 6771 flow [2024-06-03 18:45:17,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6592, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6771, PETRI_PLACES=264, PETRI_TRANSITIONS=366} [2024-06-03 18:45:17,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-03 18:45:17,884 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 366 transitions, 6771 flow [2024-06-03 18:45:17,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:17,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:17,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:17,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 18:45:17,884 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)] === [2024-06-03 18:45:17,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:17,884 INFO L85 PathProgramCache]: Analyzing trace with hash 835083605, now seen corresponding path program 1 times [2024-06-03 18:45:17,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:17,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238550433] [2024-06-03 18:45:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:17,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:18,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:18,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238550433] [2024-06-03 18:45:18,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238550433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:18,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:18,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:18,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963471769] [2024-06-03 18:45:18,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:18,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:18,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:18,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:18,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:18,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:18,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 366 transitions, 6771 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:18,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:18,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:18,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:18,614 INFO L124 PetriNetUnfolderBase]: 1934/3224 cut-off events. [2024-06-03 18:45:18,615 INFO L125 PetriNetUnfolderBase]: For 154926/154926 co-relation queries the response was YES. [2024-06-03 18:45:18,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26281 conditions, 3224 events. 1934/3224 cut-off events. For 154926/154926 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19042 event pairs, 768 based on Foata normal form. 2/3223 useless extension candidates. Maximal degree in co-relation 26146. Up to 2897 conditions per place. [2024-06-03 18:45:18,654 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 326 selfloop transitions, 51 changer transitions 0/383 dead transitions. [2024-06-03 18:45:18,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 383 transitions, 7626 flow [2024-06-03 18:45:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:45:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:45:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 18:45:18,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-03 18:45:18,655 INFO L175 Difference]: Start difference. First operand has 264 places, 366 transitions, 6771 flow. Second operand 7 states and 150 transitions. [2024-06-03 18:45:18,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 383 transitions, 7626 flow [2024-06-03 18:45:19,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 383 transitions, 7445 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 18:45:19,121 INFO L231 Difference]: Finished difference. Result has 266 places, 368 transitions, 6741 flow [2024-06-03 18:45:19,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6590, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6741, PETRI_PLACES=266, PETRI_TRANSITIONS=368} [2024-06-03 18:45:19,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-03 18:45:19,121 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 368 transitions, 6741 flow [2024-06-03 18:45:19,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:19,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:19,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:19,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 18:45:19,122 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)] === [2024-06-03 18:45:19,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:19,122 INFO L85 PathProgramCache]: Analyzing trace with hash 383379851, now seen corresponding path program 4 times [2024-06-03 18:45:19,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:19,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840854365] [2024-06-03 18:45:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:19,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:19,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:19,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840854365] [2024-06-03 18:45:19,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840854365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:19,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:19,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:45:19,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499103304] [2024-06-03 18:45:19,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:19,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:45:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:19,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:45:19,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:45:19,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:45:19,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 368 transitions, 6741 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) [2024-06-03 18:45:19,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:19,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:45:19,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:19,938 INFO L124 PetriNetUnfolderBase]: 1863/3135 cut-off events. [2024-06-03 18:45:19,938 INFO L125 PetriNetUnfolderBase]: For 152428/152436 co-relation queries the response was YES. [2024-06-03 18:45:19,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25497 conditions, 3135 events. 1863/3135 cut-off events. For 152428/152436 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 18641 event pairs, 358 based on Foata normal form. 11/3124 useless extension candidates. Maximal degree in co-relation 25361. Up to 2363 conditions per place. [2024-06-03 18:45:19,982 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 267 selfloop transitions, 96 changer transitions 0/392 dead transitions. [2024-06-03 18:45:19,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 392 transitions, 7596 flow [2024-06-03 18:45:19,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:45:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:45:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 18:45:19,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-03 18:45:19,984 INFO L175 Difference]: Start difference. First operand has 266 places, 368 transitions, 6741 flow. Second operand 6 states and 149 transitions. [2024-06-03 18:45:19,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 392 transitions, 7596 flow [2024-06-03 18:45:20,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 392 transitions, 7455 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-03 18:45:20,329 INFO L231 Difference]: Finished difference. Result has 268 places, 368 transitions, 6820 flow [2024-06-03 18:45:20,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6600, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6820, PETRI_PLACES=268, PETRI_TRANSITIONS=368} [2024-06-03 18:45:20,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-03 18:45:20,330 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 368 transitions, 6820 flow [2024-06-03 18:45:20,330 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) [2024-06-03 18:45:20,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:20,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:20,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 18:45:20,330 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)] === [2024-06-03 18:45:20,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:20,331 INFO L85 PathProgramCache]: Analyzing trace with hash 383564549, now seen corresponding path program 2 times [2024-06-03 18:45:20,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:20,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309501954] [2024-06-03 18:45:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:20,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:20,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:20,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309501954] [2024-06-03 18:45:20,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309501954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:20,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:20,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:20,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269213976] [2024-06-03 18:45:20,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:20,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:20,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:20,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:20,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:20,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:20,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 368 transitions, 6820 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:20,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:20,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:20,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:21,027 INFO L124 PetriNetUnfolderBase]: 1927/3225 cut-off events. [2024-06-03 18:45:21,027 INFO L125 PetriNetUnfolderBase]: For 157898/157898 co-relation queries the response was YES. [2024-06-03 18:45:21,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26348 conditions, 3225 events. 1927/3225 cut-off events. For 157898/157898 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19118 event pairs, 754 based on Foata normal form. 2/3226 useless extension candidates. Maximal degree in co-relation 26211. Up to 2909 conditions per place. [2024-06-03 18:45:21,061 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 348 selfloop transitions, 34 changer transitions 0/388 dead transitions. [2024-06-03 18:45:21,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 388 transitions, 7703 flow [2024-06-03 18:45:21,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:45:21,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:45:21,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 18:45:21,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:45:21,062 INFO L175 Difference]: Start difference. First operand has 268 places, 368 transitions, 6820 flow. Second operand 7 states and 154 transitions. [2024-06-03 18:45:21,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 388 transitions, 7703 flow [2024-06-03 18:45:21,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 388 transitions, 7537 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 18:45:21,508 INFO L231 Difference]: Finished difference. Result has 271 places, 370 transitions, 6775 flow [2024-06-03 18:45:21,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6654, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6775, PETRI_PLACES=271, PETRI_TRANSITIONS=370} [2024-06-03 18:45:21,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-03 18:45:21,508 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 370 transitions, 6775 flow [2024-06-03 18:45:21,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:21,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:21,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:21,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 18:45:21,509 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)] === [2024-06-03 18:45:21,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:21,509 INFO L85 PathProgramCache]: Analyzing trace with hash 611465699, now seen corresponding path program 3 times [2024-06-03 18:45:21,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:21,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245098471] [2024-06-03 18:45:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:21,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:21,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:21,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245098471] [2024-06-03 18:45:21,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245098471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:21,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:21,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:21,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754539079] [2024-06-03 18:45:21,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:21,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:21,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:21,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:21,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:21,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:21,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 370 transitions, 6775 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:21,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:21,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:21,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:22,265 INFO L124 PetriNetUnfolderBase]: 1935/3237 cut-off events. [2024-06-03 18:45:22,266 INFO L125 PetriNetUnfolderBase]: For 162098/162098 co-relation queries the response was YES. [2024-06-03 18:45:22,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26416 conditions, 3237 events. 1935/3237 cut-off events. For 162098/162098 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 19192 event pairs, 755 based on Foata normal form. 2/3238 useless extension candidates. Maximal degree in co-relation 26278. Up to 2921 conditions per place. [2024-06-03 18:45:22,298 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 349 selfloop transitions, 33 changer transitions 0/388 dead transitions. [2024-06-03 18:45:22,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 388 transitions, 7650 flow [2024-06-03 18:45:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:45:22,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:45:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-03 18:45:22,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-03 18:45:22,299 INFO L175 Difference]: Start difference. First operand has 271 places, 370 transitions, 6775 flow. Second operand 8 states and 166 transitions. [2024-06-03 18:45:22,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 388 transitions, 7650 flow [2024-06-03 18:45:22,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 388 transitions, 7549 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 18:45:22,641 INFO L231 Difference]: Finished difference. Result has 275 places, 372 transitions, 6797 flow [2024-06-03 18:45:22,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6674, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6797, PETRI_PLACES=275, PETRI_TRANSITIONS=372} [2024-06-03 18:45:22,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-03 18:45:22,641 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 372 transitions, 6797 flow [2024-06-03 18:45:22,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:22,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:22,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:22,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 18:45:22,642 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)] === [2024-06-03 18:45:22,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:22,642 INFO L85 PathProgramCache]: Analyzing trace with hash 620036579, now seen corresponding path program 4 times [2024-06-03 18:45:22,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:22,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240255646] [2024-06-03 18:45:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:22,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:22,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:22,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240255646] [2024-06-03 18:45:22,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240255646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:22,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:22,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:45:22,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41782246] [2024-06-03 18:45:22,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:22,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:45:22,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:22,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:45:22,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:45:22,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:22,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 372 transitions, 6797 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:22,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:22,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:22,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:23,373 INFO L124 PetriNetUnfolderBase]: 1976/3290 cut-off events. [2024-06-03 18:45:23,373 INFO L125 PetriNetUnfolderBase]: For 175485/175485 co-relation queries the response was YES. [2024-06-03 18:45:23,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27190 conditions, 3290 events. 1976/3290 cut-off events. For 175485/175485 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19502 event pairs, 756 based on Foata normal form. 2/3291 useless extension candidates. Maximal degree in co-relation 27051. Up to 2898 conditions per place. [2024-06-03 18:45:23,406 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 353 selfloop transitions, 37 changer transitions 0/396 dead transitions. [2024-06-03 18:45:23,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 396 transitions, 7862 flow [2024-06-03 18:45:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:45:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:45:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 18:45:23,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-03 18:45:23,407 INFO L175 Difference]: Start difference. First operand has 275 places, 372 transitions, 6797 flow. Second operand 8 states and 171 transitions. [2024-06-03 18:45:23,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 396 transitions, 7862 flow [2024-06-03 18:45:23,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 396 transitions, 7750 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 18:45:23,894 INFO L231 Difference]: Finished difference. Result has 277 places, 375 transitions, 6836 flow [2024-06-03 18:45:23,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6685, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6836, PETRI_PLACES=277, PETRI_TRANSITIONS=375} [2024-06-03 18:45:23,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-03 18:45:23,894 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 375 transitions, 6836 flow [2024-06-03 18:45:23,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:23,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:23,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:23,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 18:45:23,895 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)] === [2024-06-03 18:45:23,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:23,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1857499053, now seen corresponding path program 1 times [2024-06-03 18:45:23,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:23,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179415431] [2024-06-03 18:45:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:23,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:24,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:24,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179415431] [2024-06-03 18:45:24,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179415431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:24,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:24,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:24,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789680830] [2024-06-03 18:45:24,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:24,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:24,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:24,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:24,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:24,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:24,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 375 transitions, 6836 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:24,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:24,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:24,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:24,743 INFO L124 PetriNetUnfolderBase]: 2074/3445 cut-off events. [2024-06-03 18:45:24,743 INFO L125 PetriNetUnfolderBase]: For 194960/194960 co-relation queries the response was YES. [2024-06-03 18:45:24,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28494 conditions, 3445 events. 2074/3445 cut-off events. For 194960/194960 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20461 event pairs, 425 based on Foata normal form. 6/3448 useless extension candidates. Maximal degree in co-relation 28353. Up to 2946 conditions per place. [2024-06-03 18:45:24,777 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 357 selfloop transitions, 52 changer transitions 0/415 dead transitions. [2024-06-03 18:45:24,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 415 transitions, 8052 flow [2024-06-03 18:45:24,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:45:24,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:45:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-03 18:45:24,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-03 18:45:24,778 INFO L175 Difference]: Start difference. First operand has 277 places, 375 transitions, 6836 flow. Second operand 9 states and 192 transitions. [2024-06-03 18:45:24,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 415 transitions, 8052 flow [2024-06-03 18:45:25,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 415 transitions, 7960 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 18:45:25,241 INFO L231 Difference]: Finished difference. Result has 283 places, 383 transitions, 6992 flow [2024-06-03 18:45:25,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6744, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6992, PETRI_PLACES=283, PETRI_TRANSITIONS=383} [2024-06-03 18:45:25,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-03 18:45:25,242 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 383 transitions, 6992 flow [2024-06-03 18:45:25,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:25,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:25,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:25,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 18:45:25,242 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)] === [2024-06-03 18:45:25,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:25,242 INFO L85 PathProgramCache]: Analyzing trace with hash 56160561, now seen corresponding path program 2 times [2024-06-03 18:45:25,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:25,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239755766] [2024-06-03 18:45:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:25,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:25,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:25,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239755766] [2024-06-03 18:45:25,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239755766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:25,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:25,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:25,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218307682] [2024-06-03 18:45:25,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:25,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:25,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:25,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:25,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:25,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:25,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 383 transitions, 6992 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:25,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:25,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:25,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:26,121 INFO L124 PetriNetUnfolderBase]: 2061/3424 cut-off events. [2024-06-03 18:45:26,122 INFO L125 PetriNetUnfolderBase]: For 191230/191230 co-relation queries the response was YES. [2024-06-03 18:45:26,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28331 conditions, 3424 events. 2061/3424 cut-off events. For 191230/191230 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20271 event pairs, 427 based on Foata normal form. 6/3427 useless extension candidates. Maximal degree in co-relation 28185. Up to 3005 conditions per place. [2024-06-03 18:45:26,158 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 355 selfloop transitions, 49 changer transitions 0/410 dead transitions. [2024-06-03 18:45:26,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 410 transitions, 7975 flow [2024-06-03 18:45:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:45:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:45:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-03 18:45:26,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-03 18:45:26,159 INFO L175 Difference]: Start difference. First operand has 283 places, 383 transitions, 6992 flow. Second operand 9 states and 187 transitions. [2024-06-03 18:45:26,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 410 transitions, 7975 flow [2024-06-03 18:45:26,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 410 transitions, 7887 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 18:45:26,575 INFO L231 Difference]: Finished difference. Result has 289 places, 385 transitions, 7043 flow [2024-06-03 18:45:26,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6904, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7043, PETRI_PLACES=289, PETRI_TRANSITIONS=385} [2024-06-03 18:45:26,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-03 18:45:26,575 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 385 transitions, 7043 flow [2024-06-03 18:45:26,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:26,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:26,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:26,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 18:45:26,576 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)] === [2024-06-03 18:45:26,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:26,576 INFO L85 PathProgramCache]: Analyzing trace with hash -2094971819, now seen corresponding path program 1 times [2024-06-03 18:45:26,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:26,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260163347] [2024-06-03 18:45:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:26,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:26,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:26,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260163347] [2024-06-03 18:45:26,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260163347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:26,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:26,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:45:26,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311460397] [2024-06-03 18:45:26,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:26,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:45:26,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:26,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:45:26,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:45:26,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:26,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 385 transitions, 7043 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:26,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:26,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:26,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:27,472 INFO L124 PetriNetUnfolderBase]: 2066/3437 cut-off events. [2024-06-03 18:45:27,472 INFO L125 PetriNetUnfolderBase]: For 189309/189309 co-relation queries the response was YES. [2024-06-03 18:45:27,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28562 conditions, 3437 events. 2066/3437 cut-off events. For 189309/189309 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 20489 event pairs, 454 based on Foata normal form. 1/3432 useless extension candidates. Maximal degree in co-relation 28413. Up to 2903 conditions per place. [2024-06-03 18:45:27,507 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 282 selfloop transitions, 118 changer transitions 0/406 dead transitions. [2024-06-03 18:45:27,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 406 transitions, 8076 flow [2024-06-03 18:45:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:45:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:45:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 18:45:27,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-03 18:45:27,508 INFO L175 Difference]: Start difference. First operand has 289 places, 385 transitions, 7043 flow. Second operand 7 states and 152 transitions. [2024-06-03 18:45:27,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 406 transitions, 8076 flow [2024-06-03 18:45:27,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 406 transitions, 7980 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 18:45:27,944 INFO L231 Difference]: Finished difference. Result has 290 places, 388 transitions, 7254 flow [2024-06-03 18:45:27,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6947, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7254, PETRI_PLACES=290, PETRI_TRANSITIONS=388} [2024-06-03 18:45:27,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-03 18:45:27,944 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 388 transitions, 7254 flow [2024-06-03 18:45:27,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:27,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:27,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:27,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 18:45:27,945 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)] === [2024-06-03 18:45:27,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:27,945 INFO L85 PathProgramCache]: Analyzing trace with hash 146702661, now seen corresponding path program 1 times [2024-06-03 18:45:27,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:27,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288277148] [2024-06-03 18:45:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:27,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:28,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:28,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288277148] [2024-06-03 18:45:28,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288277148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:28,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:28,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:28,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15936543] [2024-06-03 18:45:28,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:28,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:28,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:28,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:28,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:28,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:28,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 388 transitions, 7254 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:28,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:28,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:28,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:28,885 INFO L124 PetriNetUnfolderBase]: 2211/3673 cut-off events. [2024-06-03 18:45:28,885 INFO L125 PetriNetUnfolderBase]: For 210308/210308 co-relation queries the response was YES. [2024-06-03 18:45:28,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31489 conditions, 3673 events. 2211/3673 cut-off events. For 210308/210308 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22090 event pairs, 453 based on Foata normal form. 1/3671 useless extension candidates. Maximal degree in co-relation 31339. Up to 2964 conditions per place. [2024-06-03 18:45:28,924 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 283 selfloop transitions, 195 changer transitions 0/484 dead transitions. [2024-06-03 18:45:28,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 484 transitions, 9921 flow [2024-06-03 18:45:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:45:28,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:45:28,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-03 18:45:28,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532150776053215 [2024-06-03 18:45:28,925 INFO L175 Difference]: Start difference. First operand has 290 places, 388 transitions, 7254 flow. Second operand 11 states and 240 transitions. [2024-06-03 18:45:28,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 484 transitions, 9921 flow [2024-06-03 18:45:29,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 484 transitions, 9547 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 18:45:29,454 INFO L231 Difference]: Finished difference. Result has 299 places, 433 transitions, 8437 flow [2024-06-03 18:45:29,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6989, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8437, PETRI_PLACES=299, PETRI_TRANSITIONS=433} [2024-06-03 18:45:29,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-03 18:45:29,455 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 433 transitions, 8437 flow [2024-06-03 18:45:29,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:29,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:29,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:29,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 18:45:29,455 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)] === [2024-06-03 18:45:29,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2094851849, now seen corresponding path program 2 times [2024-06-03 18:45:29,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:29,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411972659] [2024-06-03 18:45:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:29,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:29,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:29,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411972659] [2024-06-03 18:45:29,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411972659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:29,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:29,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:29,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157280924] [2024-06-03 18:45:29,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:29,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:29,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:29,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:29,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:29,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:29,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 433 transitions, 8437 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:29,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:29,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:29,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:30,343 INFO L124 PetriNetUnfolderBase]: 2205/3661 cut-off events. [2024-06-03 18:45:30,343 INFO L125 PetriNetUnfolderBase]: For 213769/213769 co-relation queries the response was YES. [2024-06-03 18:45:30,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32209 conditions, 3661 events. 2205/3661 cut-off events. For 213769/213769 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21946 event pairs, 454 based on Foata normal form. 2/3658 useless extension candidates. Maximal degree in co-relation 32055. Up to 3057 conditions per place. [2024-06-03 18:45:30,383 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 304 selfloop transitions, 143 changer transitions 0/453 dead transitions. [2024-06-03 18:45:30,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 453 transitions, 9429 flow [2024-06-03 18:45:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:45:30,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:45:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-03 18:45:30,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-03 18:45:30,384 INFO L175 Difference]: Start difference. First operand has 299 places, 433 transitions, 8437 flow. Second operand 8 states and 169 transitions. [2024-06-03 18:45:30,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 453 transitions, 9429 flow [2024-06-03 18:45:31,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 453 transitions, 9257 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-03 18:45:31,037 INFO L231 Difference]: Finished difference. Result has 303 places, 433 transitions, 8581 flow [2024-06-03 18:45:31,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8271, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8581, PETRI_PLACES=303, PETRI_TRANSITIONS=433} [2024-06-03 18:45:31,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-03 18:45:31,038 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 433 transitions, 8581 flow [2024-06-03 18:45:31,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:31,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:31,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:31,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 18:45:31,038 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)] === [2024-06-03 18:45:31,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:31,038 INFO L85 PathProgramCache]: Analyzing trace with hash 411976021, now seen corresponding path program 3 times [2024-06-03 18:45:31,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:31,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541845384] [2024-06-03 18:45:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:31,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:31,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:31,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541845384] [2024-06-03 18:45:31,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541845384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:31,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:31,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078258933] [2024-06-03 18:45:31,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:31,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:31,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:31,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:31,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:31,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:31,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 433 transitions, 8581 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:31,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:31,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:31,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:31,989 INFO L124 PetriNetUnfolderBase]: 2261/3753 cut-off events. [2024-06-03 18:45:31,989 INFO L125 PetriNetUnfolderBase]: For 227963/227963 co-relation queries the response was YES. [2024-06-03 18:45:32,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33083 conditions, 3753 events. 2261/3753 cut-off events. For 227963/227963 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 22545 event pairs, 332 based on Foata normal form. 6/3754 useless extension candidates. Maximal degree in co-relation 32927. Up to 3027 conditions per place. [2024-06-03 18:45:32,030 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 57 changer transitions 0/470 dead transitions. [2024-06-03 18:45:32,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 470 transitions, 9881 flow [2024-06-03 18:45:32,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:45:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:45:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 18:45:32,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-03 18:45:32,031 INFO L175 Difference]: Start difference. First operand has 303 places, 433 transitions, 8581 flow. Second operand 8 states and 171 transitions. [2024-06-03 18:45:32,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 470 transitions, 9881 flow [2024-06-03 18:45:32,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 470 transitions, 9502 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-03 18:45:32,611 INFO L231 Difference]: Finished difference. Result has 305 places, 440 transitions, 8433 flow [2024-06-03 18:45:32,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8204, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8433, PETRI_PLACES=305, PETRI_TRANSITIONS=440} [2024-06-03 18:45:32,612 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-03 18:45:32,612 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 440 transitions, 8433 flow [2024-06-03 18:45:32,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:32,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:32,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:32,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 18:45:32,612 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)] === [2024-06-03 18:45:32,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:32,613 INFO L85 PathProgramCache]: Analyzing trace with hash 254286577, now seen corresponding path program 3 times [2024-06-03 18:45:32,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:32,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090015148] [2024-06-03 18:45:32,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:32,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:32,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:32,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090015148] [2024-06-03 18:45:32,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090015148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:32,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:32,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:45:32,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982106061] [2024-06-03 18:45:32,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:32,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:45:32,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:32,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:45:32,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:45:32,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:32,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 440 transitions, 8433 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:32,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:32,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:32,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:33,544 INFO L124 PetriNetUnfolderBase]: 2282/3795 cut-off events. [2024-06-03 18:45:33,544 INFO L125 PetriNetUnfolderBase]: For 225643/225652 co-relation queries the response was YES. [2024-06-03 18:45:33,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33441 conditions, 3795 events. 2282/3795 cut-off events. For 225643/225652 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 23017 event pairs, 520 based on Foata normal form. 7/3789 useless extension candidates. Maximal degree in co-relation 33284. Up to 3056 conditions per place. [2024-06-03 18:45:33,584 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 319 selfloop transitions, 145 changer transitions 0/470 dead transitions. [2024-06-03 18:45:33,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 470 transitions, 9856 flow [2024-06-03 18:45:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:45:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:45:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 18:45:33,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-03 18:45:33,585 INFO L175 Difference]: Start difference. First operand has 305 places, 440 transitions, 8433 flow. Second operand 7 states and 150 transitions. [2024-06-03 18:45:33,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 470 transitions, 9856 flow [2024-06-03 18:45:34,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 470 transitions, 9749 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 18:45:34,227 INFO L231 Difference]: Finished difference. Result has 309 places, 449 transitions, 8791 flow [2024-06-03 18:45:34,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8326, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8791, PETRI_PLACES=309, PETRI_TRANSITIONS=449} [2024-06-03 18:45:34,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-03 18:45:34,228 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 449 transitions, 8791 flow [2024-06-03 18:45:34,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:34,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:34,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:34,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 18:45:34,228 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)] === [2024-06-03 18:45:34,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:34,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2023970521, now seen corresponding path program 4 times [2024-06-03 18:45:34,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:34,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130387618] [2024-06-03 18:45:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:34,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:34,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:34,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130387618] [2024-06-03 18:45:34,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130387618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:34,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:34,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:45:34,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001995623] [2024-06-03 18:45:34,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:34,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:45:34,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:45:34,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:45:34,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:34,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 449 transitions, 8791 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:34,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:34,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:34,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:35,136 INFO L124 PetriNetUnfolderBase]: 2295/3821 cut-off events. [2024-06-03 18:45:35,137 INFO L125 PetriNetUnfolderBase]: For 234765/234774 co-relation queries the response was YES. [2024-06-03 18:45:35,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33862 conditions, 3821 events. 2295/3821 cut-off events. For 234765/234774 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 23255 event pairs, 519 based on Foata normal form. 7/3815 useless extension candidates. Maximal degree in co-relation 33703. Up to 3071 conditions per place. [2024-06-03 18:45:35,182 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 145 changer transitions 0/473 dead transitions. [2024-06-03 18:45:35,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 473 transitions, 10169 flow [2024-06-03 18:45:35,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:45:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:45:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-03 18:45:35,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156794425087108 [2024-06-03 18:45:35,183 INFO L175 Difference]: Start difference. First operand has 309 places, 449 transitions, 8791 flow. Second operand 7 states and 148 transitions. [2024-06-03 18:45:35,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 473 transitions, 10169 flow [2024-06-03 18:45:35,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 473 transitions, 9737 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-03 18:45:35,942 INFO L231 Difference]: Finished difference. Result has 311 places, 455 transitions, 8788 flow [2024-06-03 18:45:35,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8399, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8788, PETRI_PLACES=311, PETRI_TRANSITIONS=455} [2024-06-03 18:45:35,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-03 18:45:35,943 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 455 transitions, 8788 flow [2024-06-03 18:45:35,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:35,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:35,943 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] [2024-06-03 18:45:35,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 18:45:35,943 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)] === [2024-06-03 18:45:35,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:35,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1352137389, now seen corresponding path program 1 times [2024-06-03 18:45:35,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:35,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929352619] [2024-06-03 18:45:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:35,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:36,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:36,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929352619] [2024-06-03 18:45:36,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929352619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:36,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:36,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:45:36,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396448823] [2024-06-03 18:45:36,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:36,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:45:36,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:36,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:45:36,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:45:36,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:36,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 455 transitions, 8788 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:36,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:36,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:36,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:36,868 INFO L124 PetriNetUnfolderBase]: 2345/3909 cut-off events. [2024-06-03 18:45:36,868 INFO L125 PetriNetUnfolderBase]: For 246861/246870 co-relation queries the response was YES. [2024-06-03 18:45:36,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34875 conditions, 3909 events. 2345/3909 cut-off events. For 246861/246870 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 23978 event pairs, 651 based on Foata normal form. 8/3909 useless extension candidates. Maximal degree in co-relation 34717. Up to 3233 conditions per place. [2024-06-03 18:45:36,912 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 308 selfloop transitions, 194 changer transitions 0/508 dead transitions. [2024-06-03 18:45:36,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 508 transitions, 11012 flow [2024-06-03 18:45:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:45:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:45:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-03 18:45:36,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-03 18:45:36,913 INFO L175 Difference]: Start difference. First operand has 311 places, 455 transitions, 8788 flow. Second operand 10 states and 211 transitions. [2024-06-03 18:45:36,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 508 transitions, 11012 flow [2024-06-03 18:45:37,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 508 transitions, 10789 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 18:45:37,621 INFO L231 Difference]: Finished difference. Result has 321 places, 482 transitions, 9782 flow [2024-06-03 18:45:37,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8573, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9782, PETRI_PLACES=321, PETRI_TRANSITIONS=482} [2024-06-03 18:45:37,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-03 18:45:37,621 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 482 transitions, 9782 flow [2024-06-03 18:45:37,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:37,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:37,622 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] [2024-06-03 18:45:37,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 18:45:37,622 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)] === [2024-06-03 18:45:37,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:37,622 INFO L85 PathProgramCache]: Analyzing trace with hash 515996307, now seen corresponding path program 5 times [2024-06-03 18:45:37,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:37,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956565190] [2024-06-03 18:45:37,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:37,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:37,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:37,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956565190] [2024-06-03 18:45:37,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956565190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:37,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:37,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:37,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435456658] [2024-06-03 18:45:37,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:37,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:37,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:37,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:37,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:37,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:37,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 482 transitions, 9782 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:37,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:37,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:37,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:38,722 INFO L124 PetriNetUnfolderBase]: 2342/3877 cut-off events. [2024-06-03 18:45:38,722 INFO L125 PetriNetUnfolderBase]: For 250778/250778 co-relation queries the response was YES. [2024-06-03 18:45:38,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35278 conditions, 3877 events. 2342/3877 cut-off events. For 250778/250778 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23495 event pairs, 528 based on Foata normal form. 1/3858 useless extension candidates. Maximal degree in co-relation 35115. Up to 3118 conditions per place. [2024-06-03 18:45:38,769 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 334 selfloop transitions, 167 changer transitions 0/507 dead transitions. [2024-06-03 18:45:38,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 507 transitions, 11146 flow [2024-06-03 18:45:38,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:45:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:45:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 18:45:38,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-03 18:45:38,770 INFO L175 Difference]: Start difference. First operand has 321 places, 482 transitions, 9782 flow. Second operand 8 states and 170 transitions. [2024-06-03 18:45:38,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 507 transitions, 11146 flow [2024-06-03 18:45:39,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 507 transitions, 10866 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-03 18:45:39,507 INFO L231 Difference]: Finished difference. Result has 325 places, 482 transitions, 9848 flow [2024-06-03 18:45:39,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9508, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9848, PETRI_PLACES=325, PETRI_TRANSITIONS=482} [2024-06-03 18:45:39,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-03 18:45:39,507 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 482 transitions, 9848 flow [2024-06-03 18:45:39,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:39,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:39,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:39,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 18:45:39,508 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)] === [2024-06-03 18:45:39,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:39,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1998383911, now seen corresponding path program 2 times [2024-06-03 18:45:39,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:39,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348749582] [2024-06-03 18:45:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:39,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:39,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:39,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348749582] [2024-06-03 18:45:39,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348749582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:39,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:39,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:39,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681608235] [2024-06-03 18:45:39,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:39,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:39,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:39,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:39,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:39,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:39,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 482 transitions, 9848 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:39,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:39,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:39,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:40,527 INFO L124 PetriNetUnfolderBase]: 2499/4140 cut-off events. [2024-06-03 18:45:40,528 INFO L125 PetriNetUnfolderBase]: For 272012/272012 co-relation queries the response was YES. [2024-06-03 18:45:40,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37667 conditions, 4140 events. 2499/4140 cut-off events. For 272012/272012 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 25481 event pairs, 513 based on Foata normal form. 1/4124 useless extension candidates. Maximal degree in co-relation 37503. Up to 2957 conditions per place. [2024-06-03 18:45:40,575 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 271 selfloop transitions, 308 changer transitions 0/585 dead transitions. [2024-06-03 18:45:40,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 585 transitions, 12892 flow [2024-06-03 18:45:40,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:45:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:45:40,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-03 18:45:40,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142276422764228 [2024-06-03 18:45:40,576 INFO L175 Difference]: Start difference. First operand has 325 places, 482 transitions, 9848 flow. Second operand 12 states and 253 transitions. [2024-06-03 18:45:40,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 585 transitions, 12892 flow [2024-06-03 18:45:41,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 585 transitions, 11985 flow, removed 58 selfloop flow, removed 9 redundant places. [2024-06-03 18:45:41,308 INFO L231 Difference]: Finished difference. Result has 332 places, 540 transitions, 10558 flow [2024-06-03 18:45:41,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9120, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10558, PETRI_PLACES=332, PETRI_TRANSITIONS=540} [2024-06-03 18:45:41,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-03 18:45:41,309 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 540 transitions, 10558 flow [2024-06-03 18:45:41,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:41,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:41,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:41,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 18:45:41,309 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)] === [2024-06-03 18:45:41,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:41,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1700092257, now seen corresponding path program 6 times [2024-06-03 18:45:41,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:41,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847690452] [2024-06-03 18:45:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:41,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:41,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:41,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847690452] [2024-06-03 18:45:41,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847690452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:41,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:41,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:41,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238828622] [2024-06-03 18:45:41,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:41,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:41,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:41,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:41,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:41,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:41,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 540 transitions, 10558 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:41,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:41,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:41,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:42,627 INFO L124 PetriNetUnfolderBase]: 2509/4149 cut-off events. [2024-06-03 18:45:42,627 INFO L125 PetriNetUnfolderBase]: For 284113/284113 co-relation queries the response was YES. [2024-06-03 18:45:42,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38075 conditions, 4149 events. 2509/4149 cut-off events. For 284113/284113 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 25509 event pairs, 549 based on Foata normal form. 2/4129 useless extension candidates. Maximal degree in co-relation 37908. Up to 3294 conditions per place. [2024-06-03 18:45:42,678 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 344 selfloop transitions, 218 changer transitions 0/568 dead transitions. [2024-06-03 18:45:42,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 568 transitions, 12019 flow [2024-06-03 18:45:42,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:45:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:45:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-03 18:45:42,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030487804878049 [2024-06-03 18:45:42,679 INFO L175 Difference]: Start difference. First operand has 332 places, 540 transitions, 10558 flow. Second operand 8 states and 165 transitions. [2024-06-03 18:45:42,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 568 transitions, 12019 flow [2024-06-03 18:45:43,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 568 transitions, 11759 flow, removed 103 selfloop flow, removed 2 redundant places. [2024-06-03 18:45:43,500 INFO L231 Difference]: Finished difference. Result has 338 places, 546 transitions, 10845 flow [2024-06-03 18:45:43,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10312, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10845, PETRI_PLACES=338, PETRI_TRANSITIONS=546} [2024-06-03 18:45:43,501 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-03 18:45:43,501 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 546 transitions, 10845 flow [2024-06-03 18:45:43,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:43,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:43,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:43,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 18:45:43,502 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)] === [2024-06-03 18:45:43,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:43,502 INFO L85 PathProgramCache]: Analyzing trace with hash -366117517, now seen corresponding path program 3 times [2024-06-03 18:45:43,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:43,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424854108] [2024-06-03 18:45:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:43,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:43,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:43,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424854108] [2024-06-03 18:45:43,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424854108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:43,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:43,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:43,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621562750] [2024-06-03 18:45:43,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:43,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:43,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:43,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:43,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:43,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:43,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 546 transitions, 10845 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:43,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:43,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:43,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:44,659 INFO L124 PetriNetUnfolderBase]: 2522/4183 cut-off events. [2024-06-03 18:45:44,659 INFO L125 PetriNetUnfolderBase]: For 288405/288405 co-relation queries the response was YES. [2024-06-03 18:45:44,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38307 conditions, 4183 events. 2522/4183 cut-off events. For 288405/288405 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 25842 event pairs, 514 based on Foata normal form. 1/4167 useless extension candidates. Maximal degree in co-relation 38137. Up to 2975 conditions per place. [2024-06-03 18:45:44,709 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 271 selfloop transitions, 319 changer transitions 0/596 dead transitions. [2024-06-03 18:45:44,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 596 transitions, 13305 flow [2024-06-03 18:45:44,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:45:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:45:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-03 18:45:44,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065666041275797 [2024-06-03 18:45:44,710 INFO L175 Difference]: Start difference. First operand has 338 places, 546 transitions, 10845 flow. Second operand 13 states and 270 transitions. [2024-06-03 18:45:44,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 596 transitions, 13305 flow [2024-06-03 18:45:45,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 596 transitions, 12989 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 18:45:45,698 INFO L231 Difference]: Finished difference. Result has 346 places, 552 transitions, 11278 flow [2024-06-03 18:45:45,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10536, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11278, PETRI_PLACES=346, PETRI_TRANSITIONS=552} [2024-06-03 18:45:45,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-03 18:45:45,699 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 552 transitions, 11278 flow [2024-06-03 18:45:45,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:45,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:45,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:45,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 18:45:45,700 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)] === [2024-06-03 18:45:45,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:45,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1690099407, now seen corresponding path program 7 times [2024-06-03 18:45:45,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:45,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57344393] [2024-06-03 18:45:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:45,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:45,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:45,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57344393] [2024-06-03 18:45:45,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57344393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:45,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:45,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:45,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862631532] [2024-06-03 18:45:45,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:45,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:45,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:45,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:45,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:45,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:45,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 552 transitions, 11278 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:45,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:45,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:45,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:46,767 INFO L124 PetriNetUnfolderBase]: 2516/4169 cut-off events. [2024-06-03 18:45:46,767 INFO L125 PetriNetUnfolderBase]: For 297780/297780 co-relation queries the response was YES. [2024-06-03 18:45:46,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38521 conditions, 4169 events. 2516/4169 cut-off events. For 297780/297780 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 25711 event pairs, 536 based on Foata normal form. 2/4150 useless extension candidates. Maximal degree in co-relation 38349. Up to 3306 conditions per place. [2024-06-03 18:45:46,817 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 351 selfloop transitions, 215 changer transitions 0/572 dead transitions. [2024-06-03 18:45:46,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 572 transitions, 12774 flow [2024-06-03 18:45:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:45:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:45:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-03 18:45:46,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-03 18:45:46,818 INFO L175 Difference]: Start difference. First operand has 346 places, 552 transitions, 11278 flow. Second operand 8 states and 166 transitions. [2024-06-03 18:45:46,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 572 transitions, 12774 flow [2024-06-03 18:45:47,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 572 transitions, 12160 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 18:45:47,685 INFO L231 Difference]: Finished difference. Result has 347 places, 552 transitions, 11114 flow [2024-06-03 18:45:47,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10672, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11114, PETRI_PLACES=347, PETRI_TRANSITIONS=552} [2024-06-03 18:45:47,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-03 18:45:47,686 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 552 transitions, 11114 flow [2024-06-03 18:45:47,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:47,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:47,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:47,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 18:45:47,686 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)] === [2024-06-03 18:45:47,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:47,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2007638155, now seen corresponding path program 8 times [2024-06-03 18:45:47,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:47,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479153133] [2024-06-03 18:45:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:47,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:47,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479153133] [2024-06-03 18:45:47,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479153133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:47,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:47,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:47,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161558305] [2024-06-03 18:45:47,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:47,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:47,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:47,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:47,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:47,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:47,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 552 transitions, 11114 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:47,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:47,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:47,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:48,761 INFO L124 PetriNetUnfolderBase]: 2510/4160 cut-off events. [2024-06-03 18:45:48,761 INFO L125 PetriNetUnfolderBase]: For 299896/299896 co-relation queries the response was YES. [2024-06-03 18:45:48,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38220 conditions, 4160 events. 2510/4160 cut-off events. For 299896/299896 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 25652 event pairs, 548 based on Foata normal form. 2/4141 useless extension candidates. Maximal degree in co-relation 38047. Up to 3300 conditions per place. [2024-06-03 18:45:48,806 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 349 selfloop transitions, 216 changer transitions 0/571 dead transitions. [2024-06-03 18:45:48,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 571 transitions, 12472 flow [2024-06-03 18:45:48,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:45:48,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:45:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-03 18:45:48,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4969512195121951 [2024-06-03 18:45:48,807 INFO L175 Difference]: Start difference. First operand has 347 places, 552 transitions, 11114 flow. Second operand 8 states and 163 transitions. [2024-06-03 18:45:48,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 571 transitions, 12472 flow [2024-06-03 18:45:49,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 571 transitions, 11873 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-03 18:45:49,720 INFO L231 Difference]: Finished difference. Result has 348 places, 552 transitions, 10957 flow [2024-06-03 18:45:49,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10515, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10957, PETRI_PLACES=348, PETRI_TRANSITIONS=552} [2024-06-03 18:45:49,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-03 18:45:49,721 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 552 transitions, 10957 flow [2024-06-03 18:45:49,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:49,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:49,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:49,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 18:45:49,721 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)] === [2024-06-03 18:45:49,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:49,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1170297823, now seen corresponding path program 4 times [2024-06-03 18:45:49,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:49,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690159859] [2024-06-03 18:45:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:49,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:49,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:49,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690159859] [2024-06-03 18:45:49,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690159859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:49,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:49,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:49,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417019297] [2024-06-03 18:45:49,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:49,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:49,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:49,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:49,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:49,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:49,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 552 transitions, 10957 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:49,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:49,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:49,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:50,862 INFO L124 PetriNetUnfolderBase]: 2507/4170 cut-off events. [2024-06-03 18:45:50,862 INFO L125 PetriNetUnfolderBase]: For 299407/299407 co-relation queries the response was YES. [2024-06-03 18:45:50,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38061 conditions, 4170 events. 2507/4170 cut-off events. For 299407/299407 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 25892 event pairs, 516 based on Foata normal form. 1/4154 useless extension candidates. Maximal degree in co-relation 37888. Up to 2965 conditions per place. [2024-06-03 18:45:50,916 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 269 selfloop transitions, 318 changer transitions 0/593 dead transitions. [2024-06-03 18:45:50,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 593 transitions, 13216 flow [2024-06-03 18:45:50,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:45:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:45:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-03 18:45:50,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254988913525499 [2024-06-03 18:45:50,917 INFO L175 Difference]: Start difference. First operand has 348 places, 552 transitions, 10957 flow. Second operand 11 states and 237 transitions. [2024-06-03 18:45:50,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 593 transitions, 13216 flow [2024-06-03 18:45:51,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 593 transitions, 12539 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-03 18:45:51,995 INFO L231 Difference]: Finished difference. Result has 351 places, 552 transitions, 10946 flow [2024-06-03 18:45:51,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10304, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10946, PETRI_PLACES=351, PETRI_TRANSITIONS=552} [2024-06-03 18:45:51,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-03 18:45:51,996 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 552 transitions, 10946 flow [2024-06-03 18:45:51,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:51,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:51,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:51,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 18:45:51,996 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)] === [2024-06-03 18:45:51,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:51,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1031116979, now seen corresponding path program 2 times [2024-06-03 18:45:51,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:51,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429770958] [2024-06-03 18:45:51,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:51,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:52,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:52,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429770958] [2024-06-03 18:45:52,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429770958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:52,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:52,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:52,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918750324] [2024-06-03 18:45:52,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:52,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:52,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:52,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:52,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:52,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:52,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 552 transitions, 10946 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:52,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:52,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:52,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:53,137 INFO L124 PetriNetUnfolderBase]: 2525/4211 cut-off events. [2024-06-03 18:45:53,138 INFO L125 PetriNetUnfolderBase]: For 307966/307966 co-relation queries the response was YES. [2024-06-03 18:45:53,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38648 conditions, 4211 events. 2525/4211 cut-off events. For 307966/307966 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26280 event pairs, 657 based on Foata normal form. 1/4202 useless extension candidates. Maximal degree in co-relation 38475. Up to 3480 conditions per place. [2024-06-03 18:45:53,192 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 380 selfloop transitions, 204 changer transitions 0/590 dead transitions. [2024-06-03 18:45:53,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 590 transitions, 12908 flow [2024-06-03 18:45:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:45:53,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:45:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 262 transitions. [2024-06-03 18:45:53,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4915572232645403 [2024-06-03 18:45:53,193 INFO L175 Difference]: Start difference. First operand has 351 places, 552 transitions, 10946 flow. Second operand 13 states and 262 transitions. [2024-06-03 18:45:53,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 590 transitions, 12908 flow [2024-06-03 18:45:54,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 590 transitions, 12260 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-03 18:45:54,286 INFO L231 Difference]: Finished difference. Result has 354 places, 561 transitions, 10932 flow [2024-06-03 18:45:54,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10310, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10932, PETRI_PLACES=354, PETRI_TRANSITIONS=561} [2024-06-03 18:45:54,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-03 18:45:54,286 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 561 transitions, 10932 flow [2024-06-03 18:45:54,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:54,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:54,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:54,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 18:45:54,287 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)] === [2024-06-03 18:45:54,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:54,288 INFO L85 PathProgramCache]: Analyzing trace with hash 258310129, now seen corresponding path program 3 times [2024-06-03 18:45:54,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:54,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755125465] [2024-06-03 18:45:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:54,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:54,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:54,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755125465] [2024-06-03 18:45:54,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755125465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:54,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:54,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:54,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467048817] [2024-06-03 18:45:54,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:54,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:54,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:54,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:54,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:54,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:54,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 561 transitions, 10932 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:54,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:54,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:54,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:55,495 INFO L124 PetriNetUnfolderBase]: 2522/4209 cut-off events. [2024-06-03 18:45:55,496 INFO L125 PetriNetUnfolderBase]: For 311317/311317 co-relation queries the response was YES. [2024-06-03 18:45:55,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38338 conditions, 4209 events. 2522/4209 cut-off events. For 311317/311317 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26281 event pairs, 657 based on Foata normal form. 1/4200 useless extension candidates. Maximal degree in co-relation 38164. Up to 3477 conditions per place. [2024-06-03 18:45:55,548 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 379 selfloop transitions, 204 changer transitions 0/589 dead transitions. [2024-06-03 18:45:55,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 589 transitions, 12544 flow [2024-06-03 18:45:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:45:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:45:55,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 261 transitions. [2024-06-03 18:45:55,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896810506566604 [2024-06-03 18:45:55,549 INFO L175 Difference]: Start difference. First operand has 354 places, 561 transitions, 10932 flow. Second operand 13 states and 261 transitions. [2024-06-03 18:45:55,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 589 transitions, 12544 flow [2024-06-03 18:45:56,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 589 transitions, 12108 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-03 18:45:56,736 INFO L231 Difference]: Finished difference. Result has 358 places, 561 transitions, 10918 flow [2024-06-03 18:45:56,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10500, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10918, PETRI_PLACES=358, PETRI_TRANSITIONS=561} [2024-06-03 18:45:56,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-03 18:45:56,737 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 561 transitions, 10918 flow [2024-06-03 18:45:56,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:56,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:56,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:56,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 18:45:56,737 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)] === [2024-06-03 18:45:56,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:56,738 INFO L85 PathProgramCache]: Analyzing trace with hash -995829341, now seen corresponding path program 4 times [2024-06-03 18:45:56,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:56,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400088873] [2024-06-03 18:45:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:56,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:56,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:56,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400088873] [2024-06-03 18:45:56,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400088873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:56,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:56,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:45:56,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470500485] [2024-06-03 18:45:56,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:56,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:45:56,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:56,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:45:56,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:45:56,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:56,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 561 transitions, 10918 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:56,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:56,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:56,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:57,790 INFO L124 PetriNetUnfolderBase]: 2532/4218 cut-off events. [2024-06-03 18:45:57,791 INFO L125 PetriNetUnfolderBase]: For 310885/310885 co-relation queries the response was YES. [2024-06-03 18:45:57,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38517 conditions, 4218 events. 2532/4218 cut-off events. For 310885/310885 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26211 event pairs, 486 based on Foata normal form. 2/4217 useless extension candidates. Maximal degree in co-relation 38343. Up to 3691 conditions per place. [2024-06-03 18:45:57,843 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 486 selfloop transitions, 94 changer transitions 0/586 dead transitions. [2024-06-03 18:45:57,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 586 transitions, 12482 flow [2024-06-03 18:45:57,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:45:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:45:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-03 18:45:57,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-03 18:45:57,844 INFO L175 Difference]: Start difference. First operand has 358 places, 561 transitions, 10918 flow. Second operand 10 states and 206 transitions. [2024-06-03 18:45:57,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 586 transitions, 12482 flow [2024-06-03 18:45:58,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 586 transitions, 12172 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-03 18:45:58,985 INFO L231 Difference]: Finished difference. Result has 357 places, 567 transitions, 10998 flow [2024-06-03 18:45:58,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10616, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10998, PETRI_PLACES=357, PETRI_TRANSITIONS=567} [2024-06-03 18:45:58,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-03 18:45:58,986 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 567 transitions, 10998 flow [2024-06-03 18:45:58,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:58,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:58,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:58,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 18:45:58,986 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)] === [2024-06-03 18:45:58,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:58,987 INFO L85 PathProgramCache]: Analyzing trace with hash -919347437, now seen corresponding path program 9 times [2024-06-03 18:45:58,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:58,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993695385] [2024-06-03 18:45:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:58,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:59,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:59,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993695385] [2024-06-03 18:45:59,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993695385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:59,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:59,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:59,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091394466] [2024-06-03 18:45:59,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:59,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:59,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:59,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:59,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:59,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:45:59,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 567 transitions, 10998 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:59,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:59,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:45:59,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:00,180 INFO L124 PetriNetUnfolderBase]: 2526/4212 cut-off events. [2024-06-03 18:46:00,181 INFO L125 PetriNetUnfolderBase]: For 306918/306918 co-relation queries the response was YES. [2024-06-03 18:46:00,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38100 conditions, 4212 events. 2526/4212 cut-off events. For 306918/306918 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26197 event pairs, 492 based on Foata normal form. 2/4208 useless extension candidates. Maximal degree in co-relation 37925. Up to 3702 conditions per place. [2024-06-03 18:46:00,242 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 498 selfloop transitions, 76 changer transitions 0/580 dead transitions. [2024-06-03 18:46:00,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 580 transitions, 12318 flow [2024-06-03 18:46:00,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:46:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:46:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 18:46:00,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-03 18:46:00,244 INFO L175 Difference]: Start difference. First operand has 357 places, 567 transitions, 10998 flow. Second operand 9 states and 175 transitions. [2024-06-03 18:46:00,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 580 transitions, 12318 flow [2024-06-03 18:46:01,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 580 transitions, 12142 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-03 18:46:01,302 INFO L231 Difference]: Finished difference. Result has 358 places, 567 transitions, 10986 flow [2024-06-03 18:46:01,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10824, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10986, PETRI_PLACES=358, PETRI_TRANSITIONS=567} [2024-06-03 18:46:01,302 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-03 18:46:01,302 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 567 transitions, 10986 flow [2024-06-03 18:46:01,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:01,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:01,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:01,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 18:46:01,303 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)] === [2024-06-03 18:46:01,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:01,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1509187877, now seen corresponding path program 5 times [2024-06-03 18:46:01,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:01,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204666448] [2024-06-03 18:46:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:01,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:01,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:01,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204666448] [2024-06-03 18:46:01,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204666448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:01,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:01,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:46:01,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694121253] [2024-06-03 18:46:01,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:01,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:46:01,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:01,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:46:01,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:46:01,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:46:01,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 567 transitions, 10986 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:01,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:01,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:46:01,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:02,385 INFO L124 PetriNetUnfolderBase]: 2539/4234 cut-off events. [2024-06-03 18:46:02,385 INFO L125 PetriNetUnfolderBase]: For 306448/306448 co-relation queries the response was YES. [2024-06-03 18:46:02,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38299 conditions, 4234 events. 2539/4234 cut-off events. For 306448/306448 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 26336 event pairs, 486 based on Foata normal form. 1/4232 useless extension candidates. Maximal degree in co-relation 38124. Up to 3665 conditions per place. [2024-06-03 18:46:02,437 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 486 selfloop transitions, 102 changer transitions 0/594 dead transitions. [2024-06-03 18:46:02,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 594 transitions, 12631 flow [2024-06-03 18:46:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:46:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:46:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-03 18:46:02,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49445676274944567 [2024-06-03 18:46:02,438 INFO L175 Difference]: Start difference. First operand has 358 places, 567 transitions, 10986 flow. Second operand 11 states and 223 transitions. [2024-06-03 18:46:02,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 594 transitions, 12631 flow [2024-06-03 18:46:03,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 594 transitions, 12448 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 18:46:03,609 INFO L231 Difference]: Finished difference. Result has 362 places, 573 transitions, 11168 flow [2024-06-03 18:46:03,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10803, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11168, PETRI_PLACES=362, PETRI_TRANSITIONS=573} [2024-06-03 18:46:03,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-03 18:46:03,609 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 573 transitions, 11168 flow [2024-06-03 18:46:03,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:03,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:03,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:03,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 18:46:03,610 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)] === [2024-06-03 18:46:03,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:03,611 INFO L85 PathProgramCache]: Analyzing trace with hash -919336091, now seen corresponding path program 6 times [2024-06-03 18:46:03,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:03,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944770612] [2024-06-03 18:46:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:03,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:03,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:03,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944770612] [2024-06-03 18:46:03,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944770612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:03,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:03,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:46:03,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381328577] [2024-06-03 18:46:03,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:03,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:46:03,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:03,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:46:03,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:46:03,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:46:03,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 573 transitions, 11168 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:03,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:03,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:46:03,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:04,695 INFO L124 PetriNetUnfolderBase]: 2544/4241 cut-off events. [2024-06-03 18:46:04,695 INFO L125 PetriNetUnfolderBase]: For 315299/315299 co-relation queries the response was YES. [2024-06-03 18:46:04,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38591 conditions, 4241 events. 2544/4241 cut-off events. For 315299/315299 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26386 event pairs, 486 based on Foata normal form. 1/4239 useless extension candidates. Maximal degree in co-relation 38414. Up to 3669 conditions per place. [2024-06-03 18:46:04,751 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 483 selfloop transitions, 108 changer transitions 0/597 dead transitions. [2024-06-03 18:46:04,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 597 transitions, 12775 flow [2024-06-03 18:46:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:46:04,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:46:04,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-03 18:46:04,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49445676274944567 [2024-06-03 18:46:04,753 INFO L175 Difference]: Start difference. First operand has 362 places, 573 transitions, 11168 flow. Second operand 11 states and 223 transitions. [2024-06-03 18:46:04,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 597 transitions, 12775 flow [2024-06-03 18:46:05,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 597 transitions, 12596 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 18:46:05,812 INFO L231 Difference]: Finished difference. Result has 366 places, 576 transitions, 11271 flow [2024-06-03 18:46:05,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10991, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11271, PETRI_PLACES=366, PETRI_TRANSITIONS=576} [2024-06-03 18:46:05,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-03 18:46:05,813 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 576 transitions, 11271 flow [2024-06-03 18:46:05,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:05,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:05,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:05,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 18:46:05,814 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)] === [2024-06-03 18:46:05,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:05,814 INFO L85 PathProgramCache]: Analyzing trace with hash 402194707, now seen corresponding path program 10 times [2024-06-03 18:46:05,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:05,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56074196] [2024-06-03 18:46:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:05,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:05,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:05,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56074196] [2024-06-03 18:46:05,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56074196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:05,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:05,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:05,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016288727] [2024-06-03 18:46:05,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:05,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:05,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:05,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:05,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:05,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:46:05,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 576 transitions, 11271 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:05,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:05,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:46:05,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:06,845 INFO L124 PetriNetUnfolderBase]: 2538/4232 cut-off events. [2024-06-03 18:46:06,845 INFO L125 PetriNetUnfolderBase]: For 320674/320674 co-relation queries the response was YES. [2024-06-03 18:46:06,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38513 conditions, 4232 events. 2538/4232 cut-off events. For 320674/320674 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26360 event pairs, 492 based on Foata normal form. 2/4229 useless extension candidates. Maximal degree in co-relation 38335. Up to 3721 conditions per place. [2024-06-03 18:46:06,900 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 505 selfloop transitions, 76 changer transitions 0/587 dead transitions. [2024-06-03 18:46:06,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 587 transitions, 12465 flow [2024-06-03 18:46:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:46:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:46:06,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 18:46:06,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-03 18:46:06,901 INFO L175 Difference]: Start difference. First operand has 366 places, 576 transitions, 11271 flow. Second operand 8 states and 158 transitions. [2024-06-03 18:46:06,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 587 transitions, 12465 flow [2024-06-03 18:46:08,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 587 transitions, 12254 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 18:46:08,187 INFO L231 Difference]: Finished difference. Result has 367 places, 576 transitions, 11223 flow [2024-06-03 18:46:08,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11060, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11223, PETRI_PLACES=367, PETRI_TRANSITIONS=576} [2024-06-03 18:46:08,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-03 18:46:08,188 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 576 transitions, 11223 flow [2024-06-03 18:46:08,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:08,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:08,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:08,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 18:46:08,188 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)] === [2024-06-03 18:46:08,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:08,188 INFO L85 PathProgramCache]: Analyzing trace with hash 829992307, now seen corresponding path program 7 times [2024-06-03 18:46:08,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:08,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596007946] [2024-06-03 18:46:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:08,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:08,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:08,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596007946] [2024-06-03 18:46:08,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596007946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:08,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:08,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:46:08,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900008560] [2024-06-03 18:46:08,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:08,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:46:08,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:08,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:46:08,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:46:08,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:46:08,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 576 transitions, 11223 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:08,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:08,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:46:08,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:09,274 INFO L124 PetriNetUnfolderBase]: 2535/4231 cut-off events. [2024-06-03 18:46:09,274 INFO L125 PetriNetUnfolderBase]: For 322584/322584 co-relation queries the response was YES. [2024-06-03 18:46:09,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38433 conditions, 4231 events. 2535/4231 cut-off events. For 322584/322584 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 26355 event pairs, 486 based on Foata normal form. 1/4229 useless extension candidates. Maximal degree in co-relation 38254. Up to 3661 conditions per place. [2024-06-03 18:46:09,330 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 483 selfloop transitions, 107 changer transitions 0/596 dead transitions. [2024-06-03 18:46:09,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 596 transitions, 12632 flow [2024-06-03 18:46:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:46:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:46:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-03 18:46:09,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002217294900224 [2024-06-03 18:46:09,331 INFO L175 Difference]: Start difference. First operand has 367 places, 576 transitions, 11223 flow. Second operand 11 states and 221 transitions. [2024-06-03 18:46:09,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 596 transitions, 12632 flow [2024-06-03 18:46:10,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 596 transitions, 12437 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 18:46:10,623 INFO L231 Difference]: Finished difference. Result has 372 places, 576 transitions, 11248 flow [2024-06-03 18:46:10,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11028, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11248, PETRI_PLACES=372, PETRI_TRANSITIONS=576} [2024-06-03 18:46:10,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-03 18:46:10,624 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 576 transitions, 11248 flow [2024-06-03 18:46:10,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:10,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:10,625 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] [2024-06-03 18:46:10,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 18:46:10,625 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)] === [2024-06-03 18:46:10,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:10,625 INFO L85 PathProgramCache]: Analyzing trace with hash -919341485, now seen corresponding path program 5 times [2024-06-03 18:46:10,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:10,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475157238] [2024-06-03 18:46:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:10,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:10,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:10,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475157238] [2024-06-03 18:46:10,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475157238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:10,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:10,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:10,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355236184] [2024-06-03 18:46:10,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:10,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:10,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:10,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:10,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:10,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:46:10,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 576 transitions, 11248 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:10,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:10,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:46:10,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:11,719 INFO L124 PetriNetUnfolderBase]: 2529/4223 cut-off events. [2024-06-03 18:46:11,719 INFO L125 PetriNetUnfolderBase]: For 326889/326889 co-relation queries the response was YES. [2024-06-03 18:46:11,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38287 conditions, 4223 events. 2529/4223 cut-off events. For 326889/326889 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26337 event pairs, 486 based on Foata normal form. 2/4222 useless extension candidates. Maximal degree in co-relation 38107. Up to 3690 conditions per place. [2024-06-03 18:46:11,773 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 494 selfloop transitions, 94 changer transitions 0/594 dead transitions. [2024-06-03 18:46:11,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 594 transitions, 12507 flow [2024-06-03 18:46:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:46:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:46:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-03 18:46:11,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 18:46:11,774 INFO L175 Difference]: Start difference. First operand has 372 places, 576 transitions, 11248 flow. Second operand 10 states and 205 transitions. [2024-06-03 18:46:11,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 594 transitions, 12507 flow [2024-06-03 18:46:13,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 594 transitions, 12259 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-03 18:46:13,020 INFO L231 Difference]: Finished difference. Result has 372 places, 576 transitions, 11202 flow [2024-06-03 18:46:13,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11000, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11202, PETRI_PLACES=372, PETRI_TRANSITIONS=576} [2024-06-03 18:46:13,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-03 18:46:13,020 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 576 transitions, 11202 flow [2024-06-03 18:46:13,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:13,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:13,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:13,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 18:46:13,021 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)] === [2024-06-03 18:46:13,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:13,021 INFO L85 PathProgramCache]: Analyzing trace with hash 753059949, now seen corresponding path program 4 times [2024-06-03 18:46:13,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:13,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307040762] [2024-06-03 18:46:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:13,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:13,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:13,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307040762] [2024-06-03 18:46:13,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307040762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:13,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:13,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:13,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789971667] [2024-06-03 18:46:13,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:13,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:13,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:13,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:13,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:13,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 576 transitions, 11202 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:13,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:13,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:13,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:14,047 INFO L124 PetriNetUnfolderBase]: 2549/4256 cut-off events. [2024-06-03 18:46:14,047 INFO L125 PetriNetUnfolderBase]: For 345526/345526 co-relation queries the response was YES. [2024-06-03 18:46:14,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38585 conditions, 4256 events. 2549/4256 cut-off events. For 345526/345526 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 26541 event pairs, 342 based on Foata normal form. 6/4257 useless extension candidates. Maximal degree in co-relation 38404. Up to 3416 conditions per place. [2024-06-03 18:46:14,100 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 536 selfloop transitions, 60 changer transitions 0/602 dead transitions. [2024-06-03 18:46:14,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 602 transitions, 12731 flow [2024-06-03 18:46:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:46:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:46:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-03 18:46:14,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-03 18:46:14,101 INFO L175 Difference]: Start difference. First operand has 372 places, 576 transitions, 11202 flow. Second operand 7 states and 158 transitions. [2024-06-03 18:46:14,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 602 transitions, 12731 flow [2024-06-03 18:46:15,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 602 transitions, 12472 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-03 18:46:15,444 INFO L231 Difference]: Finished difference. Result has 368 places, 577 transitions, 11099 flow [2024-06-03 18:46:15,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10945, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11099, PETRI_PLACES=368, PETRI_TRANSITIONS=577} [2024-06-03 18:46:15,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-03 18:46:15,444 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 577 transitions, 11099 flow [2024-06-03 18:46:15,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:15,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:15,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:15,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 18:46:15,445 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)] === [2024-06-03 18:46:15,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:15,445 INFO L85 PathProgramCache]: Analyzing trace with hash 812082059, now seen corresponding path program 5 times [2024-06-03 18:46:15,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:15,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77925784] [2024-06-03 18:46:15,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:15,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:15,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:15,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77925784] [2024-06-03 18:46:15,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77925784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:15,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:15,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:15,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884680886] [2024-06-03 18:46:15,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:15,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:15,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:15,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:15,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:15,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:15,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 577 transitions, 11099 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:15,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:15,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:15,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:16,468 INFO L124 PetriNetUnfolderBase]: 2536/4237 cut-off events. [2024-06-03 18:46:16,468 INFO L125 PetriNetUnfolderBase]: For 329875/329875 co-relation queries the response was YES. [2024-06-03 18:46:16,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38127 conditions, 4237 events. 2536/4237 cut-off events. For 329875/329875 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 26454 event pairs, 335 based on Foata normal form. 6/4238 useless extension candidates. Maximal degree in co-relation 37947. Up to 3410 conditions per place. [2024-06-03 18:46:16,520 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 535 selfloop transitions, 58 changer transitions 0/599 dead transitions. [2024-06-03 18:46:16,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 599 transitions, 12446 flow [2024-06-03 18:46:16,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:46:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:46:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-03 18:46:16,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-03 18:46:16,521 INFO L175 Difference]: Start difference. First operand has 368 places, 577 transitions, 11099 flow. Second operand 6 states and 140 transitions. [2024-06-03 18:46:16,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 599 transitions, 12446 flow [2024-06-03 18:46:17,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 599 transitions, 12276 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 18:46:17,712 INFO L231 Difference]: Finished difference. Result has 368 places, 577 transitions, 11059 flow [2024-06-03 18:46:17,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10929, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11059, PETRI_PLACES=368, PETRI_TRANSITIONS=577} [2024-06-03 18:46:17,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-03 18:46:17,712 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 577 transitions, 11059 flow [2024-06-03 18:46:17,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:17,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:17,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:17,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 18:46:17,713 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)] === [2024-06-03 18:46:17,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:17,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1717557171, now seen corresponding path program 8 times [2024-06-03 18:46:17,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:17,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147758858] [2024-06-03 18:46:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:17,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:17,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:17,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147758858] [2024-06-03 18:46:17,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147758858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:17,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:17,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:17,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623253435] [2024-06-03 18:46:17,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:17,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:17,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:17,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:17,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:17,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 577 transitions, 11059 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:17,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:17,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:17,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:18,681 INFO L124 PetriNetUnfolderBase]: 2530/4228 cut-off events. [2024-06-03 18:46:18,681 INFO L125 PetriNetUnfolderBase]: For 306397/306397 co-relation queries the response was YES. [2024-06-03 18:46:18,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37537 conditions, 4228 events. 2530/4228 cut-off events. For 306397/306397 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 26415 event pairs, 489 based on Foata normal form. 2/4225 useless extension candidates. Maximal degree in co-relation 37359. Up to 3419 conditions per place. [2024-06-03 18:46:18,731 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 375 selfloop transitions, 234 changer transitions 0/615 dead transitions. [2024-06-03 18:46:18,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 615 transitions, 12891 flow [2024-06-03 18:46:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:46:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:46:18,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-03 18:46:18,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-03 18:46:18,732 INFO L175 Difference]: Start difference. First operand has 368 places, 577 transitions, 11059 flow. Second operand 8 states and 183 transitions. [2024-06-03 18:46:18,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 615 transitions, 12891 flow [2024-06-03 18:46:19,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 615 transitions, 12746 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 18:46:19,930 INFO L231 Difference]: Finished difference. Result has 370 places, 588 transitions, 11689 flow [2024-06-03 18:46:19,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10920, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11689, PETRI_PLACES=370, PETRI_TRANSITIONS=588} [2024-06-03 18:46:19,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-03 18:46:19,930 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 588 transitions, 11689 flow [2024-06-03 18:46:19,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:19,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:19,931 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] [2024-06-03 18:46:19,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 18:46:19,931 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)] === [2024-06-03 18:46:19,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:19,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1352851757, now seen corresponding path program 6 times [2024-06-03 18:46:19,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:19,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123788183] [2024-06-03 18:46:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:19,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:20,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:20,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123788183] [2024-06-03 18:46:20,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123788183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:20,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:20,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:46:20,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50556062] [2024-06-03 18:46:20,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:20,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:46:20,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:20,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:46:20,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:46:20,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:20,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 588 transitions, 11689 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:20,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:20,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:20,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:20,897 INFO L124 PetriNetUnfolderBase]: 2534/4262 cut-off events. [2024-06-03 18:46:20,897 INFO L125 PetriNetUnfolderBase]: For 300962/300974 co-relation queries the response was YES. [2024-06-03 18:46:20,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37635 conditions, 4262 events. 2534/4262 cut-off events. For 300962/300974 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 27000 event pairs, 667 based on Foata normal form. 12/4265 useless extension candidates. Maximal degree in co-relation 37458. Up to 3499 conditions per place. [2024-06-03 18:46:20,950 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 391 selfloop transitions, 216 changer transitions 0/613 dead transitions. [2024-06-03 18:46:20,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 613 transitions, 13295 flow [2024-06-03 18:46:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:46:20,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:46:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-03 18:46:20,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-03 18:46:20,951 INFO L175 Difference]: Start difference. First operand has 370 places, 588 transitions, 11689 flow. Second operand 8 states and 173 transitions. [2024-06-03 18:46:20,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 613 transitions, 13295 flow [2024-06-03 18:46:22,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 613 transitions, 12877 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-03 18:46:22,109 INFO L231 Difference]: Finished difference. Result has 373 places, 596 transitions, 11908 flow [2024-06-03 18:46:22,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11280, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11908, PETRI_PLACES=373, PETRI_TRANSITIONS=596} [2024-06-03 18:46:22,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-03 18:46:22,110 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 596 transitions, 11908 flow [2024-06-03 18:46:22,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:22,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:22,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:22,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 18:46:22,110 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)] === [2024-06-03 18:46:22,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:22,111 INFO L85 PathProgramCache]: Analyzing trace with hash 582531661, now seen corresponding path program 9 times [2024-06-03 18:46:22,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:22,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498458736] [2024-06-03 18:46:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:22,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:22,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:22,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498458736] [2024-06-03 18:46:22,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498458736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:22,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:22,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:22,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257314159] [2024-06-03 18:46:22,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:22,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:22,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:22,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:22,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:22,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:22,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 596 transitions, 11908 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:22,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:22,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:22,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:23,120 INFO L124 PetriNetUnfolderBase]: 2544/4232 cut-off events. [2024-06-03 18:46:23,120 INFO L125 PetriNetUnfolderBase]: For 288108/288108 co-relation queries the response was YES. [2024-06-03 18:46:23,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37547 conditions, 4232 events. 2544/4232 cut-off events. For 288108/288108 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 26407 event pairs, 550 based on Foata normal form. 2/4213 useless extension candidates. Maximal degree in co-relation 37369. Up to 3008 conditions per place. [2024-06-03 18:46:23,169 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 233 selfloop transitions, 392 changer transitions 0/631 dead transitions. [2024-06-03 18:46:23,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 631 transitions, 13806 flow [2024-06-03 18:46:23,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:46:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:46:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-03 18:46:23,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-03 18:46:23,170 INFO L175 Difference]: Start difference. First operand has 373 places, 596 transitions, 11908 flow. Second operand 10 states and 214 transitions. [2024-06-03 18:46:23,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 631 transitions, 13806 flow [2024-06-03 18:46:24,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 631 transitions, 13449 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 18:46:24,219 INFO L231 Difference]: Finished difference. Result has 378 places, 606 transitions, 12606 flow [2024-06-03 18:46:24,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11555, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12606, PETRI_PLACES=378, PETRI_TRANSITIONS=606} [2024-06-03 18:46:24,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-03 18:46:24,220 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 606 transitions, 12606 flow [2024-06-03 18:46:24,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:24,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:24,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:24,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 18:46:24,221 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)] === [2024-06-03 18:46:24,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:24,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2141648537, now seen corresponding path program 10 times [2024-06-03 18:46:24,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:24,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490283616] [2024-06-03 18:46:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:24,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:24,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:24,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490283616] [2024-06-03 18:46:24,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490283616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:24,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:24,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:24,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414764861] [2024-06-03 18:46:24,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:24,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:24,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:24,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:24,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:24,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:24,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 606 transitions, 12606 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:24,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:24,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:24,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:25,194 INFO L124 PetriNetUnfolderBase]: 2562/4267 cut-off events. [2024-06-03 18:46:25,195 INFO L125 PetriNetUnfolderBase]: For 295095/295095 co-relation queries the response was YES. [2024-06-03 18:46:25,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38486 conditions, 4267 events. 2562/4267 cut-off events. For 295095/295095 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 26669 event pairs, 547 based on Foata normal form. 2/4248 useless extension candidates. Maximal degree in co-relation 38308. Up to 3022 conditions per place. [2024-06-03 18:46:25,248 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 242 selfloop transitions, 388 changer transitions 0/636 dead transitions. [2024-06-03 18:46:25,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 636 transitions, 14610 flow [2024-06-03 18:46:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:46:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:46:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-03 18:46:25,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:46:25,249 INFO L175 Difference]: Start difference. First operand has 378 places, 606 transitions, 12606 flow. Second operand 9 states and 198 transitions. [2024-06-03 18:46:25,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 636 transitions, 14610 flow [2024-06-03 18:46:26,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 636 transitions, 13979 flow, removed 138 selfloop flow, removed 5 redundant places. [2024-06-03 18:46:26,301 INFO L231 Difference]: Finished difference. Result has 382 places, 614 transitions, 12990 flow [2024-06-03 18:46:26,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12071, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12990, PETRI_PLACES=382, PETRI_TRANSITIONS=614} [2024-06-03 18:46:26,301 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-03 18:46:26,301 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 614 transitions, 12990 flow [2024-06-03 18:46:26,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:26,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:26,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:26,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 18:46:26,302 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)] === [2024-06-03 18:46:26,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:26,302 INFO L85 PathProgramCache]: Analyzing trace with hash -324174455, now seen corresponding path program 11 times [2024-06-03 18:46:26,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:26,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440221259] [2024-06-03 18:46:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:26,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:26,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:26,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440221259] [2024-06-03 18:46:26,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440221259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:26,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:26,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:26,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760689774] [2024-06-03 18:46:26,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:26,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:26,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:26,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:26,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:26,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:26,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 614 transitions, 12990 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:26,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:26,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:26,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:27,305 INFO L124 PetriNetUnfolderBase]: 2556/4261 cut-off events. [2024-06-03 18:46:27,305 INFO L125 PetriNetUnfolderBase]: For 293994/293994 co-relation queries the response was YES. [2024-06-03 18:46:27,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38669 conditions, 4261 events. 2556/4261 cut-off events. For 293994/293994 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 26697 event pairs, 549 based on Foata normal form. 2/4242 useless extension candidates. Maximal degree in co-relation 38489. Up to 3018 conditions per place. [2024-06-03 18:46:27,356 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 238 selfloop transitions, 393 changer transitions 0/637 dead transitions. [2024-06-03 18:46:27,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 637 transitions, 14640 flow [2024-06-03 18:46:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:46:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:46:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-03 18:46:27,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 18:46:27,357 INFO L175 Difference]: Start difference. First operand has 382 places, 614 transitions, 12990 flow. Second operand 11 states and 231 transitions. [2024-06-03 18:46:27,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 637 transitions, 14640 flow [2024-06-03 18:46:28,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 637 transitions, 13889 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-03 18:46:28,513 INFO L231 Difference]: Finished difference. Result has 387 places, 614 transitions, 13042 flow [2024-06-03 18:46:28,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12243, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13042, PETRI_PLACES=387, PETRI_TRANSITIONS=614} [2024-06-03 18:46:28,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-03 18:46:28,514 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 614 transitions, 13042 flow [2024-06-03 18:46:28,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:28,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:28,515 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] [2024-06-03 18:46:28,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 18:46:28,515 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)] === [2024-06-03 18:46:28,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:28,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1661253713, now seen corresponding path program 7 times [2024-06-03 18:46:28,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:28,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236460885] [2024-06-03 18:46:28,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:28,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:28,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:28,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236460885] [2024-06-03 18:46:28,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236460885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:28,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:28,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:28,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489628720] [2024-06-03 18:46:28,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:28,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:28,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:28,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:28,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:28,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:28,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 614 transitions, 13042 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:28,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:28,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:28,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:29,580 INFO L124 PetriNetUnfolderBase]: 2576/4323 cut-off events. [2024-06-03 18:46:29,580 INFO L125 PetriNetUnfolderBase]: For 299119/299122 co-relation queries the response was YES. [2024-06-03 18:46:29,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39011 conditions, 4323 events. 2576/4323 cut-off events. For 299119/299122 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 27399 event pairs, 670 based on Foata normal form. 6/4316 useless extension candidates. Maximal degree in co-relation 38831. Up to 3554 conditions per place. [2024-06-03 18:46:29,633 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 405 selfloop transitions, 236 changer transitions 0/647 dead transitions. [2024-06-03 18:46:29,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 647 transitions, 15002 flow [2024-06-03 18:46:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:46:29,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:46:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-03 18:46:29,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055432372505543 [2024-06-03 18:46:29,634 INFO L175 Difference]: Start difference. First operand has 387 places, 614 transitions, 13042 flow. Second operand 11 states and 228 transitions. [2024-06-03 18:46:29,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 647 transitions, 15002 flow [2024-06-03 18:46:30,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 647 transitions, 14300 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-03 18:46:30,779 INFO L231 Difference]: Finished difference. Result has 388 places, 626 transitions, 13152 flow [2024-06-03 18:46:30,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12352, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13152, PETRI_PLACES=388, PETRI_TRANSITIONS=626} [2024-06-03 18:46:30,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-03 18:46:30,780 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 626 transitions, 13152 flow [2024-06-03 18:46:30,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:30,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:30,780 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] [2024-06-03 18:46:30,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 18:46:30,780 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)] === [2024-06-03 18:46:30,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:30,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1349127107, now seen corresponding path program 8 times [2024-06-03 18:46:30,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:30,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102876923] [2024-06-03 18:46:30,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:30,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:30,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:30,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102876923] [2024-06-03 18:46:30,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102876923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:30,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:30,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:30,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748171558] [2024-06-03 18:46:30,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:30,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:30,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:30,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:30,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:30,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:30,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 626 transitions, 13152 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:30,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:30,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:30,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:31,807 INFO L124 PetriNetUnfolderBase]: 2564/4300 cut-off events. [2024-06-03 18:46:31,808 INFO L125 PetriNetUnfolderBase]: For 288294/288297 co-relation queries the response was YES. [2024-06-03 18:46:31,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38277 conditions, 4300 events. 2564/4300 cut-off events. For 288294/288297 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27171 event pairs, 668 based on Foata normal form. 6/4293 useless extension candidates. Maximal degree in co-relation 38097. Up to 3542 conditions per place. [2024-06-03 18:46:31,859 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 404 selfloop transitions, 236 changer transitions 0/646 dead transitions. [2024-06-03 18:46:31,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 646 transitions, 14656 flow [2024-06-03 18:46:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:46:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:46:31,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-03 18:46:31,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033259423503326 [2024-06-03 18:46:31,860 INFO L175 Difference]: Start difference. First operand has 388 places, 626 transitions, 13152 flow. Second operand 11 states and 227 transitions. [2024-06-03 18:46:31,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 646 transitions, 14656 flow [2024-06-03 18:46:33,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 646 transitions, 14170 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-03 18:46:33,121 INFO L231 Difference]: Finished difference. Result has 393 places, 626 transitions, 13166 flow [2024-06-03 18:46:33,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12668, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13166, PETRI_PLACES=393, PETRI_TRANSITIONS=626} [2024-06-03 18:46:33,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-03 18:46:33,122 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 626 transitions, 13166 flow [2024-06-03 18:46:33,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:33,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:33,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:33,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 18:46:33,122 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)] === [2024-06-03 18:46:33,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:33,122 INFO L85 PathProgramCache]: Analyzing trace with hash -229510719, now seen corresponding path program 9 times [2024-06-03 18:46:33,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:33,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648566092] [2024-06-03 18:46:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:33,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:33,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:33,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648566092] [2024-06-03 18:46:33,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648566092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:33,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:33,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:46:33,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658066145] [2024-06-03 18:46:33,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:33,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:46:33,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:33,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:46:33,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:46:33,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:33,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 626 transitions, 13166 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:33,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:33,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:33,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:34,141 INFO L124 PetriNetUnfolderBase]: 2574/4320 cut-off events. [2024-06-03 18:46:34,141 INFO L125 PetriNetUnfolderBase]: For 282747/282747 co-relation queries the response was YES. [2024-06-03 18:46:34,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38443 conditions, 4320 events. 2574/4320 cut-off events. For 282747/282747 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 27307 event pairs, 490 based on Foata normal form. 2/4317 useless extension candidates. Maximal degree in co-relation 38262. Up to 3614 conditions per place. [2024-06-03 18:46:34,193 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 494 selfloop transitions, 146 changer transitions 0/646 dead transitions. [2024-06-03 18:46:34,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 646 transitions, 14809 flow [2024-06-03 18:46:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:46:34,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:46:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-03 18:46:34,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-03 18:46:34,194 INFO L175 Difference]: Start difference. First operand has 393 places, 626 transitions, 13166 flow. Second operand 7 states and 160 transitions. [2024-06-03 18:46:34,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 646 transitions, 14809 flow [2024-06-03 18:46:35,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 646 transitions, 14305 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-03 18:46:35,280 INFO L231 Difference]: Finished difference. Result has 389 places, 632 transitions, 13160 flow [2024-06-03 18:46:35,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12670, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13160, PETRI_PLACES=389, PETRI_TRANSITIONS=632} [2024-06-03 18:46:35,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-03 18:46:35,281 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 632 transitions, 13160 flow [2024-06-03 18:46:35,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:35,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:35,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:35,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 18:46:35,282 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)] === [2024-06-03 18:46:35,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:35,282 INFO L85 PathProgramCache]: Analyzing trace with hash -236873715, now seen corresponding path program 12 times [2024-06-03 18:46:35,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:35,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274185550] [2024-06-03 18:46:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:35,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:35,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:35,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274185550] [2024-06-03 18:46:35,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274185550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:35,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:35,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:35,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258971499] [2024-06-03 18:46:35,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:35,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:35,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:35,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:35,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:35,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:35,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 632 transitions, 13160 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:35,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:35,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:35,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:36,320 INFO L124 PetriNetUnfolderBase]: 2664/4481 cut-off events. [2024-06-03 18:46:36,320 INFO L125 PetriNetUnfolderBase]: For 283996/283996 co-relation queries the response was YES. [2024-06-03 18:46:36,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39326 conditions, 4481 events. 2664/4481 cut-off events. For 283996/283996 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 28570 event pairs, 496 based on Foata normal form. 1/4477 useless extension candidates. Maximal degree in co-relation 39145. Up to 3609 conditions per place. [2024-06-03 18:46:36,376 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 494 selfloop transitions, 190 changer transitions 0/690 dead transitions. [2024-06-03 18:46:36,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 690 transitions, 15387 flow [2024-06-03 18:46:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:46:36,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:46:36,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 18:46:36,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-03 18:46:36,379 INFO L175 Difference]: Start difference. First operand has 389 places, 632 transitions, 13160 flow. Second operand 8 states and 185 transitions. [2024-06-03 18:46:36,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 690 transitions, 15387 flow [2024-06-03 18:46:37,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 690 transitions, 15145 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 18:46:37,612 INFO L231 Difference]: Finished difference. Result has 394 places, 662 transitions, 13927 flow [2024-06-03 18:46:37,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12922, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13927, PETRI_PLACES=394, PETRI_TRANSITIONS=662} [2024-06-03 18:46:37,612 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-03 18:46:37,612 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 662 transitions, 13927 flow [2024-06-03 18:46:37,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:37,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:37,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:37,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 18:46:37,613 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)] === [2024-06-03 18:46:37,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:37,614 INFO L85 PathProgramCache]: Analyzing trace with hash 206422131, now seen corresponding path program 10 times [2024-06-03 18:46:37,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:37,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334759615] [2024-06-03 18:46:37,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:37,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:37,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:37,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334759615] [2024-06-03 18:46:37,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334759615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:37,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:37,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:46:37,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179409565] [2024-06-03 18:46:37,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:37,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:46:37,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:37,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:46:37,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:46:37,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:37,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 662 transitions, 13927 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:37,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:37,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:37,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:38,668 INFO L124 PetriNetUnfolderBase]: 2658/4469 cut-off events. [2024-06-03 18:46:38,668 INFO L125 PetriNetUnfolderBase]: For 282967/282967 co-relation queries the response was YES. [2024-06-03 18:46:38,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39632 conditions, 4469 events. 2658/4469 cut-off events. For 282967/282967 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 28496 event pairs, 495 based on Foata normal form. 2/4466 useless extension candidates. Maximal degree in co-relation 39449. Up to 3736 conditions per place. [2024-06-03 18:46:38,725 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 522 selfloop transitions, 152 changer transitions 0/680 dead transitions. [2024-06-03 18:46:38,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 680 transitions, 15359 flow [2024-06-03 18:46:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:46:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:46:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 18:46:38,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 18:46:38,726 INFO L175 Difference]: Start difference. First operand has 394 places, 662 transitions, 13927 flow. Second operand 7 states and 163 transitions. [2024-06-03 18:46:38,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 680 transitions, 15359 flow [2024-06-03 18:46:40,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 680 transitions, 15190 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 18:46:40,026 INFO L231 Difference]: Finished difference. Result has 397 places, 662 transitions, 14084 flow [2024-06-03 18:46:40,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13758, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14084, PETRI_PLACES=397, PETRI_TRANSITIONS=662} [2024-06-03 18:46:40,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-03 18:46:40,027 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 662 transitions, 14084 flow [2024-06-03 18:46:40,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:40,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:40,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:40,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 18:46:40,027 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)] === [2024-06-03 18:46:40,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:40,028 INFO L85 PathProgramCache]: Analyzing trace with hash 206427525, now seen corresponding path program 13 times [2024-06-03 18:46:40,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:40,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940972062] [2024-06-03 18:46:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:40,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:40,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:40,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940972062] [2024-06-03 18:46:40,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940972062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:40,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:40,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:40,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429256783] [2024-06-03 18:46:40,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:40,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:40,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:40,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:40,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:40,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:40,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 662 transitions, 14084 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:40,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:40,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:40,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:41,076 INFO L124 PetriNetUnfolderBase]: 2663/4481 cut-off events. [2024-06-03 18:46:41,076 INFO L125 PetriNetUnfolderBase]: For 281691/281691 co-relation queries the response was YES. [2024-06-03 18:46:41,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40030 conditions, 4481 events. 2663/4481 cut-off events. For 281691/281691 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 28599 event pairs, 493 based on Foata normal form. 1/4477 useless extension candidates. Maximal degree in co-relation 39846. Up to 3608 conditions per place. [2024-06-03 18:46:41,134 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 493 selfloop transitions, 191 changer transitions 0/690 dead transitions. [2024-06-03 18:46:41,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 690 transitions, 15934 flow [2024-06-03 18:46:41,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:46:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:46:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 18:46:41,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-03 18:46:41,135 INFO L175 Difference]: Start difference. First operand has 397 places, 662 transitions, 14084 flow. Second operand 8 states and 182 transitions. [2024-06-03 18:46:41,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 690 transitions, 15934 flow [2024-06-03 18:46:42,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 690 transitions, 15507 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 18:46:42,452 INFO L231 Difference]: Finished difference. Result has 397 places, 665 transitions, 14119 flow [2024-06-03 18:46:42,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13661, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14119, PETRI_PLACES=397, PETRI_TRANSITIONS=665} [2024-06-03 18:46:42,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-03 18:46:42,453 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 665 transitions, 14119 flow [2024-06-03 18:46:42,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:42,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:42,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:42,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 18:46:42,453 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)] === [2024-06-03 18:46:42,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:42,454 INFO L85 PathProgramCache]: Analyzing trace with hash -229510905, now seen corresponding path program 14 times [2024-06-03 18:46:42,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:42,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678200947] [2024-06-03 18:46:42,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:42,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:42,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:42,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678200947] [2024-06-03 18:46:42,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678200947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:42,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:42,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:42,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675589107] [2024-06-03 18:46:42,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:42,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:42,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:42,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:42,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:42,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:42,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 665 transitions, 14119 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:42,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:42,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:42,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:43,607 INFO L124 PetriNetUnfolderBase]: 2660/4472 cut-off events. [2024-06-03 18:46:43,608 INFO L125 PetriNetUnfolderBase]: For 278854/278854 co-relation queries the response was YES. [2024-06-03 18:46:43,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39977 conditions, 4472 events. 2660/4472 cut-off events. For 278854/278854 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 28481 event pairs, 493 based on Foata normal form. 1/4468 useless extension candidates. Maximal degree in co-relation 39793. Up to 3606 conditions per place. [2024-06-03 18:46:43,663 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 501 selfloop transitions, 176 changer transitions 0/683 dead transitions. [2024-06-03 18:46:43,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 683 transitions, 15696 flow [2024-06-03 18:46:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:46:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:46:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 18:46:43,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-03 18:46:43,664 INFO L175 Difference]: Start difference. First operand has 397 places, 665 transitions, 14119 flow. Second operand 8 states and 177 transitions. [2024-06-03 18:46:43,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 683 transitions, 15696 flow [2024-06-03 18:46:45,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 683 transitions, 15425 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 18:46:45,221 INFO L231 Difference]: Finished difference. Result has 401 places, 667 transitions, 14324 flow [2024-06-03 18:46:45,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13850, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14324, PETRI_PLACES=401, PETRI_TRANSITIONS=667} [2024-06-03 18:46:45,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-03 18:46:45,222 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 667 transitions, 14324 flow [2024-06-03 18:46:45,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:45,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:45,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:45,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 18:46:45,222 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)] === [2024-06-03 18:46:45,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:45,222 INFO L85 PathProgramCache]: Analyzing trace with hash 281398035, now seen corresponding path program 11 times [2024-06-03 18:46:45,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:45,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282883240] [2024-06-03 18:46:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:45,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:45,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:45,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282883240] [2024-06-03 18:46:45,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282883240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:45,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:45,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:46:45,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272491359] [2024-06-03 18:46:45,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:45,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:46:45,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:45,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:46:45,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:46:45,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:45,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 667 transitions, 14324 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:45,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:45,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:45,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:46,267 INFO L124 PetriNetUnfolderBase]: 2665/4502 cut-off events. [2024-06-03 18:46:46,268 INFO L125 PetriNetUnfolderBase]: For 287641/287653 co-relation queries the response was YES. [2024-06-03 18:46:46,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40320 conditions, 4502 events. 2665/4502 cut-off events. For 287641/287653 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 29010 event pairs, 686 based on Foata normal form. 9/4502 useless extension candidates. Maximal degree in co-relation 40135. Up to 3648 conditions per place. [2024-06-03 18:46:46,325 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 456 selfloop transitions, 225 changer transitions 0/687 dead transitions. [2024-06-03 18:46:46,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 687 transitions, 15972 flow [2024-06-03 18:46:46,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:46:46,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:46:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-03 18:46:46,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-03 18:46:46,326 INFO L175 Difference]: Start difference. First operand has 401 places, 667 transitions, 14324 flow. Second operand 7 states and 155 transitions. [2024-06-03 18:46:46,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 687 transitions, 15972 flow [2024-06-03 18:46:47,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 687 transitions, 15773 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 18:46:47,724 INFO L231 Difference]: Finished difference. Result has 403 places, 671 transitions, 14653 flow [2024-06-03 18:46:47,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14127, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14653, PETRI_PLACES=403, PETRI_TRANSITIONS=671} [2024-06-03 18:46:47,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-03 18:46:47,725 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 671 transitions, 14653 flow [2024-06-03 18:46:47,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:47,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:47,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:47,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 18:46:47,725 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)] === [2024-06-03 18:46:47,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:47,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1013382765, now seen corresponding path program 12 times [2024-06-03 18:46:47,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:47,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047814039] [2024-06-03 18:46:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:47,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:47,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:47,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047814039] [2024-06-03 18:46:47,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047814039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:47,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:47,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:47,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436832634] [2024-06-03 18:46:47,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:47,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:47,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:47,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:47,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:47,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:47,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 671 transitions, 14653 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:47,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:47,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:47,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:48,898 INFO L124 PetriNetUnfolderBase]: 2670/4491 cut-off events. [2024-06-03 18:46:48,898 INFO L125 PetriNetUnfolderBase]: For 289172/289175 co-relation queries the response was YES. [2024-06-03 18:46:48,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40525 conditions, 4491 events. 2670/4491 cut-off events. For 289172/289175 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 28803 event pairs, 690 based on Foata normal form. 3/4478 useless extension candidates. Maximal degree in co-relation 40340. Up to 3654 conditions per place. [2024-06-03 18:46:48,945 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 449 selfloop transitions, 237 changer transitions 0/692 dead transitions. [2024-06-03 18:46:48,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 692 transitions, 16446 flow [2024-06-03 18:46:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:46:48,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:46:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-03 18:46:48,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:46:48,947 INFO L175 Difference]: Start difference. First operand has 403 places, 671 transitions, 14653 flow. Second operand 8 states and 176 transitions. [2024-06-03 18:46:48,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 692 transitions, 16446 flow [2024-06-03 18:46:50,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 692 transitions, 16190 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-03 18:46:50,414 INFO L231 Difference]: Finished difference. Result has 409 places, 674 transitions, 14938 flow [2024-06-03 18:46:50,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14402, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14938, PETRI_PLACES=409, PETRI_TRANSITIONS=674} [2024-06-03 18:46:50,414 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-03 18:46:50,414 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 674 transitions, 14938 flow [2024-06-03 18:46:50,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:50,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:50,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:50,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 18:46:50,415 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)] === [2024-06-03 18:46:50,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:50,415 INFO L85 PathProgramCache]: Analyzing trace with hash -434180611, now seen corresponding path program 13 times [2024-06-03 18:46:50,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:50,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134219916] [2024-06-03 18:46:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:50,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:50,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:50,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134219916] [2024-06-03 18:46:50,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134219916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:50,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:50,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:50,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911785239] [2024-06-03 18:46:50,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:50,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:50,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:50,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:50,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:50,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:50,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 674 transitions, 14938 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:50,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:50,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:50,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:51,464 INFO L124 PetriNetUnfolderBase]: 2675/4495 cut-off events. [2024-06-03 18:46:51,464 INFO L125 PetriNetUnfolderBase]: For 299110/299113 co-relation queries the response was YES. [2024-06-03 18:46:51,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40757 conditions, 4495 events. 2675/4495 cut-off events. For 299110/299113 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 28786 event pairs, 688 based on Foata normal form. 3/4485 useless extension candidates. Maximal degree in co-relation 40570. Up to 3660 conditions per place. [2024-06-03 18:46:51,520 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 445 selfloop transitions, 246 changer transitions 0/697 dead transitions. [2024-06-03 18:46:51,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 697 transitions, 16750 flow [2024-06-03 18:46:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:46:51,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:46:51,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-03 18:46:51,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 18:46:51,521 INFO L175 Difference]: Start difference. First operand has 409 places, 674 transitions, 14938 flow. Second operand 10 states and 210 transitions. [2024-06-03 18:46:51,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 697 transitions, 16750 flow [2024-06-03 18:46:52,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 697 transitions, 16095 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 18:46:52,686 INFO L231 Difference]: Finished difference. Result has 412 places, 677 transitions, 14843 flow [2024-06-03 18:46:52,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14305, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14843, PETRI_PLACES=412, PETRI_TRANSITIONS=677} [2024-06-03 18:46:52,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-03 18:46:52,686 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 677 transitions, 14843 flow [2024-06-03 18:46:52,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:52,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:52,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:52,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 18:46:52,687 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)] === [2024-06-03 18:46:52,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:52,687 INFO L85 PathProgramCache]: Analyzing trace with hash 117327415, now seen corresponding path program 15 times [2024-06-03 18:46:52,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:52,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140251927] [2024-06-03 18:46:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:52,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:52,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:52,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140251927] [2024-06-03 18:46:52,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140251927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:52,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:52,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:52,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083681346] [2024-06-03 18:46:52,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:52,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:52,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:52,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:52,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:52,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:52,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 677 transitions, 14843 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:52,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:52,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:52,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:53,790 INFO L124 PetriNetUnfolderBase]: 2680/4471 cut-off events. [2024-06-03 18:46:53,790 INFO L125 PetriNetUnfolderBase]: For 303718/303718 co-relation queries the response was YES. [2024-06-03 18:46:53,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40791 conditions, 4471 events. 2680/4471 cut-off events. For 303718/303718 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 28337 event pairs, 600 based on Foata normal form. 1/4442 useless extension candidates. Maximal degree in co-relation 40604. Up to 3050 conditions per place. [2024-06-03 18:46:53,843 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 410 changer transitions 0/706 dead transitions. [2024-06-03 18:46:53,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 706 transitions, 16857 flow [2024-06-03 18:46:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:46:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:46:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 18:46:53,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-03 18:46:53,844 INFO L175 Difference]: Start difference. First operand has 412 places, 677 transitions, 14843 flow. Second operand 8 states and 177 transitions. [2024-06-03 18:46:53,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 706 transitions, 16857 flow [2024-06-03 18:46:55,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 706 transitions, 16231 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-03 18:46:55,142 INFO L231 Difference]: Finished difference. Result has 412 places, 686 transitions, 15568 flow [2024-06-03 18:46:55,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14223, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15568, PETRI_PLACES=412, PETRI_TRANSITIONS=686} [2024-06-03 18:46:55,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-03 18:46:55,142 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 686 transitions, 15568 flow [2024-06-03 18:46:55,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:55,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:55,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:55,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 18:46:55,143 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)] === [2024-06-03 18:46:55,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:55,143 INFO L85 PathProgramCache]: Analyzing trace with hash -63764427, now seen corresponding path program 14 times [2024-06-03 18:46:55,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:55,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760126115] [2024-06-03 18:46:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:55,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:55,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:55,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760126115] [2024-06-03 18:46:55,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760126115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:55,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:55,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:46:55,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485872652] [2024-06-03 18:46:55,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:55,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:46:55,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:55,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:46:55,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:46:55,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:55,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 686 transitions, 15568 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:55,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:55,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:55,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:56,273 INFO L124 PetriNetUnfolderBase]: 2677/4507 cut-off events. [2024-06-03 18:46:56,273 INFO L125 PetriNetUnfolderBase]: For 308697/308700 co-relation queries the response was YES. [2024-06-03 18:46:56,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41563 conditions, 4507 events. 2677/4507 cut-off events. For 308697/308700 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 28952 event pairs, 690 based on Foata normal form. 3/4494 useless extension candidates. Maximal degree in co-relation 41375. Up to 3664 conditions per place. [2024-06-03 18:46:56,336 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 452 selfloop transitions, 248 changer transitions 0/706 dead transitions. [2024-06-03 18:46:56,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 706 transitions, 17198 flow [2024-06-03 18:46:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:46:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:46:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-03 18:46:56,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49889135254988914 [2024-06-03 18:46:56,337 INFO L175 Difference]: Start difference. First operand has 412 places, 686 transitions, 15568 flow. Second operand 11 states and 225 transitions. [2024-06-03 18:46:56,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 706 transitions, 17198 flow [2024-06-03 18:46:57,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 706 transitions, 16798 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-03 18:46:57,725 INFO L231 Difference]: Finished difference. Result has 419 places, 686 transitions, 15670 flow [2024-06-03 18:46:57,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15168, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15670, PETRI_PLACES=419, PETRI_TRANSITIONS=686} [2024-06-03 18:46:57,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-03 18:46:57,725 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 686 transitions, 15670 flow [2024-06-03 18:46:57,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:57,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:57,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:57,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 18:46:57,725 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)] === [2024-06-03 18:46:57,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:57,726 INFO L85 PathProgramCache]: Analyzing trace with hash -994624097, now seen corresponding path program 15 times [2024-06-03 18:46:57,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:57,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996632613] [2024-06-03 18:46:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:57,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:57,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:57,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996632613] [2024-06-03 18:46:57,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996632613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:57,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:57,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:46:57,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738476383] [2024-06-03 18:46:57,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:57,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:46:57,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:57,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:46:57,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:46:57,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:57,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 686 transitions, 15670 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:57,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:57,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:57,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:58,790 INFO L124 PetriNetUnfolderBase]: 2698/4540 cut-off events. [2024-06-03 18:46:58,790 INFO L125 PetriNetUnfolderBase]: For 310942/310942 co-relation queries the response was YES. [2024-06-03 18:46:58,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41197 conditions, 4540 events. 2698/4540 cut-off events. For 310942/310942 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 29088 event pairs, 483 based on Foata normal form. 1/4536 useless extension candidates. Maximal degree in co-relation 41008. Up to 3704 conditions per place. [2024-06-03 18:46:58,847 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 513 selfloop transitions, 192 changer transitions 0/711 dead transitions. [2024-06-03 18:46:58,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 711 transitions, 17618 flow [2024-06-03 18:46:58,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:46:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:46:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-03 18:46:58,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-03 18:46:58,848 INFO L175 Difference]: Start difference. First operand has 419 places, 686 transitions, 15670 flow. Second operand 8 states and 178 transitions. [2024-06-03 18:46:58,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 711 transitions, 17618 flow [2024-06-03 18:47:00,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 711 transitions, 17091 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-03 18:47:00,376 INFO L231 Difference]: Finished difference. Result has 418 places, 695 transitions, 15725 flow [2024-06-03 18:47:00,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15161, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15725, PETRI_PLACES=418, PETRI_TRANSITIONS=695} [2024-06-03 18:47:00,377 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-03 18:47:00,377 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 695 transitions, 15725 flow [2024-06-03 18:47:00,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:00,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:00,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:00,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 18:47:00,377 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)] === [2024-06-03 18:47:00,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:00,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1775106921, now seen corresponding path program 16 times [2024-06-03 18:47:00,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:00,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715277960] [2024-06-03 18:47:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:00,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:00,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:00,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715277960] [2024-06-03 18:47:00,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715277960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:00,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:00,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:47:00,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271564065] [2024-06-03 18:47:00,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:00,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:47:00,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:00,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:47:00,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:47:00,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:00,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 695 transitions, 15725 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:00,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:00,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:00,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:01,466 INFO L124 PetriNetUnfolderBase]: 2727/4594 cut-off events. [2024-06-03 18:47:01,466 INFO L125 PetriNetUnfolderBase]: For 325335/325335 co-relation queries the response was YES. [2024-06-03 18:47:01,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41867 conditions, 4594 events. 2727/4594 cut-off events. For 325335/325335 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 29519 event pairs, 484 based on Foata normal form. 1/4590 useless extension candidates. Maximal degree in co-relation 41677. Up to 3507 conditions per place. [2024-06-03 18:47:01,526 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 478 selfloop transitions, 240 changer transitions 0/724 dead transitions. [2024-06-03 18:47:01,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 724 transitions, 17816 flow [2024-06-03 18:47:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:47:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:47:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-03 18:47:01,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-03 18:47:01,527 INFO L175 Difference]: Start difference. First operand has 418 places, 695 transitions, 15725 flow. Second operand 9 states and 195 transitions. [2024-06-03 18:47:01,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 724 transitions, 17816 flow [2024-06-03 18:47:02,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 724 transitions, 17539 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 18:47:02,872 INFO L231 Difference]: Finished difference. Result has 423 places, 707 transitions, 16354 flow [2024-06-03 18:47:02,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15450, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16354, PETRI_PLACES=423, PETRI_TRANSITIONS=707} [2024-06-03 18:47:02,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-03 18:47:02,872 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 707 transitions, 16354 flow [2024-06-03 18:47:02,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:02,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:02,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:02,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 18:47:02,873 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)] === [2024-06-03 18:47:02,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1597975401, now seen corresponding path program 17 times [2024-06-03 18:47:02,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:02,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102552484] [2024-06-03 18:47:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:02,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:02,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:02,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102552484] [2024-06-03 18:47:02,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102552484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:02,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:02,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:47:02,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361494920] [2024-06-03 18:47:02,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:03,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:47:03,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:47:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:47:03,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:03,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 707 transitions, 16354 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:03,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:03,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:03,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:03,955 INFO L124 PetriNetUnfolderBase]: 2724/4589 cut-off events. [2024-06-03 18:47:03,955 INFO L125 PetriNetUnfolderBase]: For 333062/333062 co-relation queries the response was YES. [2024-06-03 18:47:03,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42229 conditions, 4589 events. 2724/4589 cut-off events. For 333062/333062 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 29486 event pairs, 484 based on Foata normal form. 1/4585 useless extension candidates. Maximal degree in co-relation 42037. Up to 3505 conditions per place. [2024-06-03 18:47:04,017 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 484 selfloop transitions, 235 changer transitions 0/725 dead transitions. [2024-06-03 18:47:04,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 725 transitions, 18150 flow [2024-06-03 18:47:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:47:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:47:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-03 18:47:04,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-03 18:47:04,018 INFO L175 Difference]: Start difference. First operand has 423 places, 707 transitions, 16354 flow. Second operand 10 states and 214 transitions. [2024-06-03 18:47:04,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 725 transitions, 18150 flow [2024-06-03 18:47:05,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 725 transitions, 17673 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-03 18:47:05,277 INFO L231 Difference]: Finished difference. Result has 428 places, 707 transitions, 16353 flow [2024-06-03 18:47:05,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15877, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16353, PETRI_PLACES=428, PETRI_TRANSITIONS=707} [2024-06-03 18:47:05,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-03 18:47:05,278 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 707 transitions, 16353 flow [2024-06-03 18:47:05,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:05,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:05,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:05,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 18:47:05,279 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)] === [2024-06-03 18:47:05,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:05,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1161717909, now seen corresponding path program 16 times [2024-06-03 18:47:05,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:05,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715220264] [2024-06-03 18:47:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:05,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:05,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:05,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715220264] [2024-06-03 18:47:05,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715220264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:05,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:05,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:05,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202894203] [2024-06-03 18:47:05,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:05,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:05,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:05,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:05,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:05,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:05,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 707 transitions, 16353 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:05,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:05,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:05,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:06,394 INFO L124 PetriNetUnfolderBase]: 2718/4581 cut-off events. [2024-06-03 18:47:06,395 INFO L125 PetriNetUnfolderBase]: For 336761/336761 co-relation queries the response was YES. [2024-06-03 18:47:06,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42026 conditions, 4581 events. 2718/4581 cut-off events. For 336761/336761 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 29426 event pairs, 484 based on Foata normal form. 2/4578 useless extension candidates. Maximal degree in co-relation 41833. Up to 3734 conditions per place. [2024-06-03 18:47:06,614 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 533 selfloop transitions, 185 changer transitions 0/724 dead transitions. [2024-06-03 18:47:06,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 724 transitions, 18149 flow [2024-06-03 18:47:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:47:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:47:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-03 18:47:06,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-03 18:47:06,615 INFO L175 Difference]: Start difference. First operand has 428 places, 707 transitions, 16353 flow. Second operand 9 states and 197 transitions. [2024-06-03 18:47:06,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 724 transitions, 18149 flow [2024-06-03 18:47:07,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 724 transitions, 17726 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-03 18:47:07,673 INFO L231 Difference]: Finished difference. Result has 430 places, 707 transitions, 16312 flow [2024-06-03 18:47:07,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15930, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16312, PETRI_PLACES=430, PETRI_TRANSITIONS=707} [2024-06-03 18:47:07,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-03 18:47:07,674 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 707 transitions, 16312 flow [2024-06-03 18:47:07,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:07,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:07,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:07,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 18:47:07,674 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)] === [2024-06-03 18:47:07,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:07,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1654911403, now seen corresponding path program 18 times [2024-06-03 18:47:07,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:07,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886226852] [2024-06-03 18:47:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:07,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:07,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:07,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886226852] [2024-06-03 18:47:07,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886226852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:07,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:07,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:47:07,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792983324] [2024-06-03 18:47:07,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:07,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:47:07,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:07,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:47:07,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:47:07,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:07,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 707 transitions, 16312 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:07,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:07,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:07,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:08,885 INFO L124 PetriNetUnfolderBase]: 2723/4588 cut-off events. [2024-06-03 18:47:08,886 INFO L125 PetriNetUnfolderBase]: For 341167/341167 co-relation queries the response was YES. [2024-06-03 18:47:08,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42050 conditions, 4588 events. 2723/4588 cut-off events. For 341167/341167 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 29503 event pairs, 480 based on Foata normal form. 1/4584 useless extension candidates. Maximal degree in co-relation 41856. Up to 3729 conditions per place. [2024-06-03 18:47:08,949 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 578 selfloop transitions, 151 changer transitions 0/735 dead transitions. [2024-06-03 18:47:08,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 735 transitions, 18132 flow [2024-06-03 18:47:08,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:47:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:47:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-03 18:47:08,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-03 18:47:08,950 INFO L175 Difference]: Start difference. First operand has 430 places, 707 transitions, 16312 flow. Second operand 8 states and 181 transitions. [2024-06-03 18:47:08,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 735 transitions, 18132 flow [2024-06-03 18:47:10,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 735 transitions, 17782 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 18:47:10,537 INFO L231 Difference]: Finished difference. Result has 432 places, 710 transitions, 16345 flow [2024-06-03 18:47:10,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15962, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16345, PETRI_PLACES=432, PETRI_TRANSITIONS=710} [2024-06-03 18:47:10,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-03 18:47:10,538 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 710 transitions, 16345 flow [2024-06-03 18:47:10,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:10,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:10,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:10,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 18:47:10,539 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)] === [2024-06-03 18:47:10,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:10,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1642024393, now seen corresponding path program 19 times [2024-06-03 18:47:10,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:10,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111739204] [2024-06-03 18:47:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:10,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:10,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:10,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111739204] [2024-06-03 18:47:10,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111739204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:10,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:10,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:47:10,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150659842] [2024-06-03 18:47:10,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:10,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:47:10,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:47:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:47:10,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:10,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 710 transitions, 16345 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:10,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:10,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:10,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:11,689 INFO L124 PetriNetUnfolderBase]: 2720/4584 cut-off events. [2024-06-03 18:47:11,689 INFO L125 PetriNetUnfolderBase]: For 344311/344311 co-relation queries the response was YES. [2024-06-03 18:47:11,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42034 conditions, 4584 events. 2720/4584 cut-off events. For 344311/344311 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29458 event pairs, 484 based on Foata normal form. 1/4580 useless extension candidates. Maximal degree in co-relation 41839. Up to 3502 conditions per place. [2024-06-03 18:47:11,748 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 468 selfloop transitions, 259 changer transitions 0/733 dead transitions. [2024-06-03 18:47:11,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 733 transitions, 18231 flow [2024-06-03 18:47:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:47:11,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:47:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-03 18:47:11,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-03 18:47:11,749 INFO L175 Difference]: Start difference. First operand has 432 places, 710 transitions, 16345 flow. Second operand 8 states and 181 transitions. [2024-06-03 18:47:11,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 733 transitions, 18231 flow [2024-06-03 18:47:13,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 733 transitions, 17630 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 18:47:13,476 INFO L231 Difference]: Finished difference. Result has 433 places, 710 transitions, 16268 flow [2024-06-03 18:47:13,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15744, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16268, PETRI_PLACES=433, PETRI_TRANSITIONS=710} [2024-06-03 18:47:13,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-03 18:47:13,477 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 710 transitions, 16268 flow [2024-06-03 18:47:13,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:13,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:13,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:13,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 18:47:13,477 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)] === [2024-06-03 18:47:13,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:13,477 INFO L85 PathProgramCache]: Analyzing trace with hash -999986477, now seen corresponding path program 17 times [2024-06-03 18:47:13,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:13,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96810997] [2024-06-03 18:47:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:13,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:13,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:13,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96810997] [2024-06-03 18:47:13,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96810997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:13,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:13,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:13,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733752308] [2024-06-03 18:47:13,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:13,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:13,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:13,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:13,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:13,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:13,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 710 transitions, 16268 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:13,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:13,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:13,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:14,561 INFO L124 PetriNetUnfolderBase]: 2717/4579 cut-off events. [2024-06-03 18:47:14,561 INFO L125 PetriNetUnfolderBase]: For 348940/348940 co-relation queries the response was YES. [2024-06-03 18:47:14,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41698 conditions, 4579 events. 2717/4579 cut-off events. For 348940/348940 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 29508 event pairs, 488 based on Foata normal form. 1/4575 useless extension candidates. Maximal degree in co-relation 41504. Up to 3734 conditions per place. [2024-06-03 18:47:14,623 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 530 selfloop transitions, 195 changer transitions 0/731 dead transitions. [2024-06-03 18:47:14,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 731 transitions, 18141 flow [2024-06-03 18:47:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:47:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:47:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 18:47:14,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 18:47:14,624 INFO L175 Difference]: Start difference. First operand has 433 places, 710 transitions, 16268 flow. Second operand 7 states and 164 transitions. [2024-06-03 18:47:14,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 731 transitions, 18141 flow [2024-06-03 18:47:16,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 731 transitions, 17307 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 18:47:16,565 INFO L231 Difference]: Finished difference. Result has 433 places, 710 transitions, 15830 flow [2024-06-03 18:47:16,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15434, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15830, PETRI_PLACES=433, PETRI_TRANSITIONS=710} [2024-06-03 18:47:16,565 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-03 18:47:16,565 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 710 transitions, 15830 flow [2024-06-03 18:47:16,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:16,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:16,566 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] [2024-06-03 18:47:16,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 18:47:16,566 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)] === [2024-06-03 18:47:16,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:16,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1647565147, now seen corresponding path program 18 times [2024-06-03 18:47:16,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:16,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347977035] [2024-06-03 18:47:16,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:16,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:16,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:16,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347977035] [2024-06-03 18:47:16,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347977035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:16,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:16,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:16,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971971517] [2024-06-03 18:47:16,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:16,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:16,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:16,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:16,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:16,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:16,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 710 transitions, 15830 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:16,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:16,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:16,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:17,674 INFO L124 PetriNetUnfolderBase]: 2745/4623 cut-off events. [2024-06-03 18:47:17,674 INFO L125 PetriNetUnfolderBase]: For 358204/358204 co-relation queries the response was YES. [2024-06-03 18:47:17,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41643 conditions, 4623 events. 2745/4623 cut-off events. For 358204/358204 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 29691 event pairs, 481 based on Foata normal form. 1/4619 useless extension candidates. Maximal degree in co-relation 41449. Up to 3898 conditions per place. [2024-06-03 18:47:17,734 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 625 selfloop transitions, 112 changer transitions 0/743 dead transitions. [2024-06-03 18:47:17,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 743 transitions, 17829 flow [2024-06-03 18:47:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:47:17,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:47:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 18:47:17,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 18:47:17,735 INFO L175 Difference]: Start difference. First operand has 433 places, 710 transitions, 15830 flow. Second operand 7 states and 161 transitions. [2024-06-03 18:47:17,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 743 transitions, 17829 flow [2024-06-03 18:47:19,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 743 transitions, 16971 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-03 18:47:19,409 INFO L231 Difference]: Finished difference. Result has 430 places, 721 transitions, 15613 flow [2024-06-03 18:47:19,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15008, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15613, PETRI_PLACES=430, PETRI_TRANSITIONS=721} [2024-06-03 18:47:19,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-03 18:47:19,410 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 721 transitions, 15613 flow [2024-06-03 18:47:19,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:19,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:19,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:19,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 18:47:19,410 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)] === [2024-06-03 18:47:19,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:19,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1654922563, now seen corresponding path program 20 times [2024-06-03 18:47:19,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:19,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820493751] [2024-06-03 18:47:19,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:19,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:19,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:19,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820493751] [2024-06-03 18:47:19,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820493751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:19,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:19,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:47:19,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560695870] [2024-06-03 18:47:19,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:19,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:47:19,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:19,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:47:19,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:47:19,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:19,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 721 transitions, 15613 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:19,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:19,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:19,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:20,750 INFO L124 PetriNetUnfolderBase]: 2742/4619 cut-off events. [2024-06-03 18:47:20,750 INFO L125 PetriNetUnfolderBase]: For 355967/355967 co-relation queries the response was YES. [2024-06-03 18:47:20,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40927 conditions, 4619 events. 2742/4619 cut-off events. For 355967/355967 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 29694 event pairs, 480 based on Foata normal form. 1/4615 useless extension candidates. Maximal degree in co-relation 40733. Up to 3741 conditions per place. [2024-06-03 18:47:20,804 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 584 selfloop transitions, 159 changer transitions 0/749 dead transitions. [2024-06-03 18:47:20,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 749 transitions, 17238 flow [2024-06-03 18:47:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:47:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:47:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-03 18:47:20,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-03 18:47:20,805 INFO L175 Difference]: Start difference. First operand has 430 places, 721 transitions, 15613 flow. Second operand 10 states and 216 transitions. [2024-06-03 18:47:20,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 749 transitions, 17238 flow [2024-06-03 18:47:22,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 749 transitions, 16946 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 18:47:22,688 INFO L231 Difference]: Finished difference. Result has 436 places, 721 transitions, 15645 flow [2024-06-03 18:47:22,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15321, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15645, PETRI_PLACES=436, PETRI_TRANSITIONS=721} [2024-06-03 18:47:22,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-03 18:47:22,689 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 721 transitions, 15645 flow [2024-06-03 18:47:22,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:22,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:22,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:22,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 18:47:22,690 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)] === [2024-06-03 18:47:22,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:22,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1654911217, now seen corresponding path program 19 times [2024-06-03 18:47:22,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:22,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484013890] [2024-06-03 18:47:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:22,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:22,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:22,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484013890] [2024-06-03 18:47:22,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484013890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:22,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:22,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:22,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563283817] [2024-06-03 18:47:22,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:22,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:22,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:22,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:22,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:22,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:22,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 721 transitions, 15645 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:22,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:22,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:22,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:23,795 INFO L124 PetriNetUnfolderBase]: 2769/4667 cut-off events. [2024-06-03 18:47:23,795 INFO L125 PetriNetUnfolderBase]: For 359949/359949 co-relation queries the response was YES. [2024-06-03 18:47:23,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41521 conditions, 4667 events. 2769/4667 cut-off events. For 359949/359949 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 30098 event pairs, 483 based on Foata normal form. 1/4663 useless extension candidates. Maximal degree in co-relation 41326. Up to 3837 conditions per place. [2024-06-03 18:47:23,857 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 571 selfloop transitions, 175 changer transitions 0/752 dead transitions. [2024-06-03 18:47:23,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 752 transitions, 17849 flow [2024-06-03 18:47:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:47:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:47:23,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 18:47:23,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-03 18:47:23,858 INFO L175 Difference]: Start difference. First operand has 436 places, 721 transitions, 15645 flow. Second operand 6 states and 142 transitions. [2024-06-03 18:47:23,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 752 transitions, 17849 flow [2024-06-03 18:47:25,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 752 transitions, 17471 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-03 18:47:25,480 INFO L231 Difference]: Finished difference. Result has 434 places, 737 transitions, 16218 flow [2024-06-03 18:47:25,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15267, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=16218, PETRI_PLACES=434, PETRI_TRANSITIONS=737} [2024-06-03 18:47:25,481 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-03 18:47:25,481 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 737 transitions, 16218 flow [2024-06-03 18:47:25,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:25,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:25,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:25,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 18:47:25,482 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)] === [2024-06-03 18:47:25,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:25,482 INFO L85 PathProgramCache]: Analyzing trace with hash -856686325, now seen corresponding path program 20 times [2024-06-03 18:47:25,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:25,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368065695] [2024-06-03 18:47:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:25,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:25,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:25,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368065695] [2024-06-03 18:47:25,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368065695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:25,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:25,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:25,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555102257] [2024-06-03 18:47:25,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:25,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:25,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:25,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:25,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 737 transitions, 16218 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:25,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:25,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:25,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:26,760 INFO L124 PetriNetUnfolderBase]: 2766/4661 cut-off events. [2024-06-03 18:47:26,761 INFO L125 PetriNetUnfolderBase]: For 364032/364032 co-relation queries the response was YES. [2024-06-03 18:47:26,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41584 conditions, 4661 events. 2766/4661 cut-off events. For 364032/364032 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 30052 event pairs, 481 based on Foata normal form. 1/4657 useless extension candidates. Maximal degree in co-relation 41387. Up to 3834 conditions per place. [2024-06-03 18:47:26,826 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 564 selfloop transitions, 189 changer transitions 0/759 dead transitions. [2024-06-03 18:47:26,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 759 transitions, 17871 flow [2024-06-03 18:47:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:47:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:47:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-03 18:47:26,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-03 18:47:26,827 INFO L175 Difference]: Start difference. First operand has 434 places, 737 transitions, 16218 flow. Second operand 8 states and 181 transitions. [2024-06-03 18:47:26,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 759 transitions, 17871 flow [2024-06-03 18:47:28,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 759 transitions, 17486 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 18:47:28,347 INFO L231 Difference]: Finished difference. Result has 437 places, 737 transitions, 16243 flow [2024-06-03 18:47:28,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15835, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16243, PETRI_PLACES=437, PETRI_TRANSITIONS=737} [2024-06-03 18:47:28,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-03 18:47:28,347 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 737 transitions, 16243 flow [2024-06-03 18:47:28,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:28,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:28,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:28,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 18:47:28,348 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)] === [2024-06-03 18:47:28,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash 192693333, now seen corresponding path program 1 times [2024-06-03 18:47:28,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:28,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54790582] [2024-06-03 18:47:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:28,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:28,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:28,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54790582] [2024-06-03 18:47:28,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54790582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:28,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:28,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:28,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779502474] [2024-06-03 18:47:28,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:28,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:28,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:28,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:28,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:28,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:28,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 737 transitions, 16243 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:28,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:28,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:28,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:29,474 INFO L124 PetriNetUnfolderBase]: 2852/4806 cut-off events. [2024-06-03 18:47:29,474 INFO L125 PetriNetUnfolderBase]: For 440319/440328 co-relation queries the response was YES. [2024-06-03 18:47:29,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43472 conditions, 4806 events. 2852/4806 cut-off events. For 440319/440328 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31222 event pairs, 894 based on Foata normal form. 12/4816 useless extension candidates. Maximal degree in co-relation 43274. Up to 4043 conditions per place. [2024-06-03 18:47:29,537 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 715 selfloop transitions, 52 changer transitions 0/773 dead transitions. [2024-06-03 18:47:29,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 773 transitions, 18201 flow [2024-06-03 18:47:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:47:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:47:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-03 18:47:29,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-03 18:47:29,538 INFO L175 Difference]: Start difference. First operand has 437 places, 737 transitions, 16243 flow. Second operand 7 states and 159 transitions. [2024-06-03 18:47:29,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 773 transitions, 18201 flow [2024-06-03 18:47:31,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 773 transitions, 17822 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 18:47:31,175 INFO L231 Difference]: Finished difference. Result has 440 places, 744 transitions, 16109 flow [2024-06-03 18:47:31,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15868, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16109, PETRI_PLACES=440, PETRI_TRANSITIONS=744} [2024-06-03 18:47:31,176 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-03 18:47:31,176 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 744 transitions, 16109 flow [2024-06-03 18:47:31,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:31,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:31,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:31,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 18:47:31,177 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)] === [2024-06-03 18:47:31,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:31,177 INFO L85 PathProgramCache]: Analyzing trace with hash -208735595, now seen corresponding path program 2 times [2024-06-03 18:47:31,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:31,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045539040] [2024-06-03 18:47:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:31,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:31,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:31,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045539040] [2024-06-03 18:47:31,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045539040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:31,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:31,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:31,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279778393] [2024-06-03 18:47:31,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:31,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:31,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:31,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:31,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:31,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:31,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 744 transitions, 16109 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:31,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:31,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:31,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:32,353 INFO L124 PetriNetUnfolderBase]: 2918/4913 cut-off events. [2024-06-03 18:47:32,353 INFO L125 PetriNetUnfolderBase]: For 460360/460369 co-relation queries the response was YES. [2024-06-03 18:47:32,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44579 conditions, 4913 events. 2918/4913 cut-off events. For 460360/460369 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 31954 event pairs, 916 based on Foata normal form. 12/4923 useless extension candidates. Maximal degree in co-relation 44379. Up to 4268 conditions per place. [2024-06-03 18:47:32,416 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 715 selfloop transitions, 48 changer transitions 0/769 dead transitions. [2024-06-03 18:47:32,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 769 transitions, 17968 flow [2024-06-03 18:47:32,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:47:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:47:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-03 18:47:32,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-03 18:47:32,417 INFO L175 Difference]: Start difference. First operand has 440 places, 744 transitions, 16109 flow. Second operand 7 states and 156 transitions. [2024-06-03 18:47:32,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 769 transitions, 17968 flow [2024-06-03 18:47:34,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 769 transitions, 17882 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-03 18:47:34,357 INFO L231 Difference]: Finished difference. Result has 446 places, 747 transitions, 16180 flow [2024-06-03 18:47:34,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16027, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16180, PETRI_PLACES=446, PETRI_TRANSITIONS=747} [2024-06-03 18:47:34,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-03 18:47:34,357 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 747 transitions, 16180 flow [2024-06-03 18:47:34,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:34,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:34,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:34,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 18:47:34,358 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)] === [2024-06-03 18:47:34,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:34,358 INFO L85 PathProgramCache]: Analyzing trace with hash -208587725, now seen corresponding path program 3 times [2024-06-03 18:47:34,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:34,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306009557] [2024-06-03 18:47:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:34,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:34,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:34,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306009557] [2024-06-03 18:47:34,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306009557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:34,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:34,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:34,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573889458] [2024-06-03 18:47:34,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:34,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:34,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:34,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:34,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:34,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:34,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 747 transitions, 16180 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:34,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:34,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:34,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:35,594 INFO L124 PetriNetUnfolderBase]: 2900/4887 cut-off events. [2024-06-03 18:47:35,594 INFO L125 PetriNetUnfolderBase]: For 446970/446979 co-relation queries the response was YES. [2024-06-03 18:47:35,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43860 conditions, 4887 events. 2900/4887 cut-off events. For 446970/446979 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 31877 event pairs, 914 based on Foata normal form. 14/4899 useless extension candidates. Maximal degree in co-relation 43657. Up to 4290 conditions per place. [2024-06-03 18:47:35,663 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 713 selfloop transitions, 47 changer transitions 0/766 dead transitions. [2024-06-03 18:47:35,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 766 transitions, 17815 flow [2024-06-03 18:47:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:47:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:47:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 18:47:35,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-03 18:47:35,664 INFO L175 Difference]: Start difference. First operand has 446 places, 747 transitions, 16180 flow. Second operand 7 states and 152 transitions. [2024-06-03 18:47:35,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 766 transitions, 17815 flow [2024-06-03 18:47:37,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 766 transitions, 17727 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 18:47:37,494 INFO L231 Difference]: Finished difference. Result has 450 places, 748 transitions, 16215 flow [2024-06-03 18:47:37,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16104, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16215, PETRI_PLACES=450, PETRI_TRANSITIONS=748} [2024-06-03 18:47:37,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-03 18:47:37,495 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 748 transitions, 16215 flow [2024-06-03 18:47:37,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:37,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:37,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:37,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 18:47:37,496 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)] === [2024-06-03 18:47:37,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:37,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1008011457, now seen corresponding path program 4 times [2024-06-03 18:47:37,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:37,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902917110] [2024-06-03 18:47:37,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:37,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:37,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:37,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902917110] [2024-06-03 18:47:37,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902917110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:37,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:37,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:47:37,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990473927] [2024-06-03 18:47:37,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:37,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:47:37,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:37,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:47:37,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:47:37,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:37,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 748 transitions, 16215 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:37,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:37,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:37,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:38,721 INFO L124 PetriNetUnfolderBase]: 2928/4927 cut-off events. [2024-06-03 18:47:38,721 INFO L125 PetriNetUnfolderBase]: For 453946/453946 co-relation queries the response was YES. [2024-06-03 18:47:38,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44182 conditions, 4927 events. 2928/4927 cut-off events. For 453946/453946 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32109 event pairs, 918 based on Foata normal form. 8/4932 useless extension candidates. Maximal degree in co-relation 43977. Up to 4334 conditions per place. [2024-06-03 18:47:38,789 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 713 selfloop transitions, 51 changer transitions 0/770 dead transitions. [2024-06-03 18:47:38,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 770 transitions, 17863 flow [2024-06-03 18:47:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:47:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:47:38,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-03 18:47:38,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951219512195122 [2024-06-03 18:47:38,790 INFO L175 Difference]: Start difference. First operand has 450 places, 748 transitions, 16215 flow. Second operand 10 states and 203 transitions. [2024-06-03 18:47:38,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 770 transitions, 17863 flow [2024-06-03 18:47:40,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 770 transitions, 17776 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 18:47:40,879 INFO L231 Difference]: Finished difference. Result has 456 places, 749 transitions, 16258 flow [2024-06-03 18:47:40,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16128, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16258, PETRI_PLACES=456, PETRI_TRANSITIONS=749} [2024-06-03 18:47:40,880 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-03 18:47:40,881 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 749 transitions, 16258 flow [2024-06-03 18:47:40,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:40,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:40,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:40,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 18:47:40,881 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)] === [2024-06-03 18:47:40,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:40,882 INFO L85 PathProgramCache]: Analyzing trace with hash -439534063, now seen corresponding path program 5 times [2024-06-03 18:47:40,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:40,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98103192] [2024-06-03 18:47:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:40,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:41,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:41,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98103192] [2024-06-03 18:47:41,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98103192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:41,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:41,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:47:41,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946252191] [2024-06-03 18:47:41,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:41,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:47:41,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:41,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:47:41,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:47:41,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:41,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 749 transitions, 16258 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:41,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:41,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:41,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:42,245 INFO L124 PetriNetUnfolderBase]: 2943/4956 cut-off events. [2024-06-03 18:47:42,245 INFO L125 PetriNetUnfolderBase]: For 455182/455182 co-relation queries the response was YES. [2024-06-03 18:47:42,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44353 conditions, 4956 events. 2943/4956 cut-off events. For 455182/455182 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 32331 event pairs, 923 based on Foata normal form. 8/4961 useless extension candidates. Maximal degree in co-relation 44147. Up to 4359 conditions per place. [2024-06-03 18:47:42,314 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 713 selfloop transitions, 50 changer transitions 0/769 dead transitions. [2024-06-03 18:47:42,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 769 transitions, 17902 flow [2024-06-03 18:47:42,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:47:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:47:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 18:47:42,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-03 18:47:42,315 INFO L175 Difference]: Start difference. First operand has 456 places, 749 transitions, 16258 flow. Second operand 8 states and 171 transitions. [2024-06-03 18:47:42,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 769 transitions, 17902 flow [2024-06-03 18:47:44,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 769 transitions, 17789 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 18:47:44,327 INFO L231 Difference]: Finished difference. Result has 456 places, 750 transitions, 16275 flow [2024-06-03 18:47:44,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16145, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16275, PETRI_PLACES=456, PETRI_TRANSITIONS=750} [2024-06-03 18:47:44,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-03 18:47:44,327 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 750 transitions, 16275 flow [2024-06-03 18:47:44,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:44,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:44,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:44,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 18:47:44,328 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)] === [2024-06-03 18:47:44,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash -439681933, now seen corresponding path program 6 times [2024-06-03 18:47:44,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:44,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089690081] [2024-06-03 18:47:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:44,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:44,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:44,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089690081] [2024-06-03 18:47:44,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089690081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:44,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:44,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:47:44,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613097070] [2024-06-03 18:47:44,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:44,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:47:44,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:44,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:47:44,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:47:44,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:44,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 750 transitions, 16275 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:44,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:44,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:44,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:45,572 INFO L124 PetriNetUnfolderBase]: 2963/4992 cut-off events. [2024-06-03 18:47:45,572 INFO L125 PetriNetUnfolderBase]: For 456384/456384 co-relation queries the response was YES. [2024-06-03 18:47:45,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44621 conditions, 4992 events. 2963/4992 cut-off events. For 456384/456384 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 32651 event pairs, 923 based on Foata normal form. 6/4995 useless extension candidates. Maximal degree in co-relation 44414. Up to 4329 conditions per place. [2024-06-03 18:47:45,642 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 716 selfloop transitions, 53 changer transitions 0/775 dead transitions. [2024-06-03 18:47:45,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 775 transitions, 17986 flow [2024-06-03 18:47:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:47:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:47:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-03 18:47:45,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-03 18:47:45,642 INFO L175 Difference]: Start difference. First operand has 456 places, 750 transitions, 16275 flow. Second operand 8 states and 173 transitions. [2024-06-03 18:47:45,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 775 transitions, 17986 flow [2024-06-03 18:47:47,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 775 transitions, 17873 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 18:47:47,696 INFO L231 Difference]: Finished difference. Result has 459 places, 753 transitions, 16341 flow [2024-06-03 18:47:47,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16162, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16341, PETRI_PLACES=459, PETRI_TRANSITIONS=753} [2024-06-03 18:47:47,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-03 18:47:47,697 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 753 transitions, 16341 flow [2024-06-03 18:47:47,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:47,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:47,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:47,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 18:47:47,697 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)] === [2024-06-03 18:47:47,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:47,698 INFO L85 PathProgramCache]: Analyzing trace with hash -433956481, now seen corresponding path program 1 times [2024-06-03 18:47:47,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:47,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252898946] [2024-06-03 18:47:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:47,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:47,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:47,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252898946] [2024-06-03 18:47:47,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252898946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:47,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:47,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:47:47,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686598350] [2024-06-03 18:47:47,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:47,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:47:47,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:47,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:47:47,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:47:47,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:47,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 753 transitions, 16341 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:47,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:47,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:47,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:49,146 INFO L124 PetriNetUnfolderBase]: 2950/4973 cut-off events. [2024-06-03 18:47:49,146 INFO L125 PetriNetUnfolderBase]: For 440991/440991 co-relation queries the response was YES. [2024-06-03 18:47:49,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44066 conditions, 4973 events. 2950/4973 cut-off events. For 440991/440991 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 32507 event pairs, 916 based on Foata normal form. 6/4976 useless extension candidates. Maximal degree in co-relation 43857. Up to 4310 conditions per place. [2024-06-03 18:47:49,205 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 716 selfloop transitions, 55 changer transitions 0/777 dead transitions. [2024-06-03 18:47:49,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 777 transitions, 17998 flow [2024-06-03 18:47:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:47:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:47:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-03 18:47:49,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 18:47:49,206 INFO L175 Difference]: Start difference. First operand has 459 places, 753 transitions, 16341 flow. Second operand 10 states and 205 transitions. [2024-06-03 18:47:49,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 777 transitions, 17998 flow [2024-06-03 18:47:51,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 777 transitions, 17908 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 18:47:51,149 INFO L231 Difference]: Finished difference. Result has 465 places, 753 transitions, 16365 flow [2024-06-03 18:47:51,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16251, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16365, PETRI_PLACES=465, PETRI_TRANSITIONS=753} [2024-06-03 18:47:51,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-03 18:47:51,150 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 753 transitions, 16365 flow [2024-06-03 18:47:51,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:51,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:51,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:51,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 18:47:51,150 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)] === [2024-06-03 18:47:51,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:51,150 INFO L85 PathProgramCache]: Analyzing trace with hash -194610593, now seen corresponding path program 7 times [2024-06-03 18:47:51,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:51,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125936008] [2024-06-03 18:47:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:51,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:51,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:51,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125936008] [2024-06-03 18:47:51,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125936008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:51,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:51,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:51,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705947227] [2024-06-03 18:47:51,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:51,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:51,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:51,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:51,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:51,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:51,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 753 transitions, 16365 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:51,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:51,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:51,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:52,395 INFO L124 PetriNetUnfolderBase]: 2978/5020 cut-off events. [2024-06-03 18:47:52,396 INFO L125 PetriNetUnfolderBase]: For 455673/455673 co-relation queries the response was YES. [2024-06-03 18:47:52,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44441 conditions, 5020 events. 2978/5020 cut-off events. For 455673/455673 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32845 event pairs, 916 based on Foata normal form. 8/5027 useless extension candidates. Maximal degree in co-relation 44230. Up to 4437 conditions per place. [2024-06-03 18:47:52,466 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 734 selfloop transitions, 33 changer transitions 0/773 dead transitions. [2024-06-03 18:47:52,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 773 transitions, 18011 flow [2024-06-03 18:47:52,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:47:52,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:47:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 18:47:52,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 18:47:52,467 INFO L175 Difference]: Start difference. First operand has 465 places, 753 transitions, 16365 flow. Second operand 8 states and 168 transitions. [2024-06-03 18:47:52,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 773 transitions, 18011 flow [2024-06-03 18:47:54,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 773 transitions, 17848 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-03 18:47:54,747 INFO L231 Difference]: Finished difference. Result has 464 places, 754 transitions, 16292 flow [2024-06-03 18:47:54,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16203, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16292, PETRI_PLACES=464, PETRI_TRANSITIONS=754} [2024-06-03 18:47:54,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-03 18:47:54,747 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 754 transitions, 16292 flow [2024-06-03 18:47:54,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:54,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:54,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:54,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 18:47:54,748 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)] === [2024-06-03 18:47:54,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:54,748 INFO L85 PathProgramCache]: Analyzing trace with hash -999977549, now seen corresponding path program 8 times [2024-06-03 18:47:54,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:54,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764241315] [2024-06-03 18:47:54,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:54,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:54,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:54,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764241315] [2024-06-03 18:47:54,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764241315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:54,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:54,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:54,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403886381] [2024-06-03 18:47:54,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:54,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:54,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:54,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:54,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:54,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:54,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 754 transitions, 16292 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:54,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:54,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:54,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:56,008 INFO L124 PetriNetUnfolderBase]: 2960/4994 cut-off events. [2024-06-03 18:47:56,008 INFO L125 PetriNetUnfolderBase]: For 429669/429669 co-relation queries the response was YES. [2024-06-03 18:47:56,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43285 conditions, 4994 events. 2960/4994 cut-off events. For 429669/429669 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32713 event pairs, 909 based on Foata normal form. 8/5001 useless extension candidates. Maximal degree in co-relation 43074. Up to 4411 conditions per place. [2024-06-03 18:47:56,076 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 736 selfloop transitions, 33 changer transitions 0/775 dead transitions. [2024-06-03 18:47:56,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 775 transitions, 17937 flow [2024-06-03 18:47:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:47:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:47:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-03 18:47:56,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-03 18:47:56,078 INFO L175 Difference]: Start difference. First operand has 464 places, 754 transitions, 16292 flow. Second operand 7 states and 156 transitions. [2024-06-03 18:47:56,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 775 transitions, 17937 flow [2024-06-03 18:47:58,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 775 transitions, 17864 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 18:47:58,185 INFO L231 Difference]: Finished difference. Result has 465 places, 754 transitions, 16290 flow [2024-06-03 18:47:58,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16219, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16290, PETRI_PLACES=465, PETRI_TRANSITIONS=754} [2024-06-03 18:47:58,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-03 18:47:58,186 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 754 transitions, 16290 flow [2024-06-03 18:47:58,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:58,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:58,186 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] [2024-06-03 18:47:58,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 18:47:58,187 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)] === [2024-06-03 18:47:58,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:58,187 INFO L85 PathProgramCache]: Analyzing trace with hash -200120843, now seen corresponding path program 9 times [2024-06-03 18:47:58,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:58,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592973949] [2024-06-03 18:47:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:58,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:58,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:58,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592973949] [2024-06-03 18:47:58,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592973949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:58,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:58,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:47:58,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845704954] [2024-06-03 18:47:58,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:58,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:47:58,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:58,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:47:58,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:47:58,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:58,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 754 transitions, 16290 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:58,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:58,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:58,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:59,577 INFO L124 PetriNetUnfolderBase]: 2947/4970 cut-off events. [2024-06-03 18:47:59,577 INFO L125 PetriNetUnfolderBase]: For 403088/403088 co-relation queries the response was YES. [2024-06-03 18:47:59,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42636 conditions, 4970 events. 2947/4970 cut-off events. For 403088/403088 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 32516 event pairs, 884 based on Foata normal form. 6/4975 useless extension candidates. Maximal degree in co-relation 42424. Up to 4305 conditions per place. [2024-06-03 18:47:59,646 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 738 selfloop transitions, 39 changer transitions 0/783 dead transitions. [2024-06-03 18:47:59,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 783 transitions, 18022 flow [2024-06-03 18:47:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:47:59,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:47:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 18:47:59,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-03 18:47:59,647 INFO L175 Difference]: Start difference. First operand has 465 places, 754 transitions, 16290 flow. Second operand 7 states and 162 transitions. [2024-06-03 18:47:59,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 783 transitions, 18022 flow [2024-06-03 18:48:01,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 783 transitions, 17933 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 18:48:01,618 INFO L231 Difference]: Finished difference. Result has 468 places, 756 transitions, 16334 flow [2024-06-03 18:48:01,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16209, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16334, PETRI_PLACES=468, PETRI_TRANSITIONS=756} [2024-06-03 18:48:01,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-03 18:48:01,619 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 756 transitions, 16334 flow [2024-06-03 18:48:01,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:01,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:01,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:01,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 18:48:01,619 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)] === [2024-06-03 18:48:01,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:01,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1775568387, now seen corresponding path program 2 times [2024-06-03 18:48:01,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:01,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298504869] [2024-06-03 18:48:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:01,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:01,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:01,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298504869] [2024-06-03 18:48:01,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298504869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:01,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:01,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:48:01,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462005136] [2024-06-03 18:48:01,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:01,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:48:01,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:01,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:48:01,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:48:01,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:48:01,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 756 transitions, 16334 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:01,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:01,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:48:01,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:02,828 INFO L124 PetriNetUnfolderBase]: 2934/4954 cut-off events. [2024-06-03 18:48:02,829 INFO L125 PetriNetUnfolderBase]: For 383840/383840 co-relation queries the response was YES. [2024-06-03 18:48:02,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42052 conditions, 4954 events. 2934/4954 cut-off events. For 383840/383840 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 32409 event pairs, 880 based on Foata normal form. 6/4959 useless extension candidates. Maximal degree in co-relation 41838. Up to 4283 conditions per place. [2024-06-03 18:48:02,896 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 732 selfloop transitions, 40 changer transitions 0/778 dead transitions. [2024-06-03 18:48:02,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 778 transitions, 17989 flow [2024-06-03 18:48:02,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:48:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:48:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 18:48:02,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-03 18:48:02,896 INFO L175 Difference]: Start difference. First operand has 468 places, 756 transitions, 16334 flow. Second operand 8 states and 171 transitions. [2024-06-03 18:48:02,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 778 transitions, 17989 flow [2024-06-03 18:48:04,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 778 transitions, 17801 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 18:48:04,954 INFO L231 Difference]: Finished difference. Result has 469 places, 756 transitions, 16232 flow [2024-06-03 18:48:04,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16146, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16232, PETRI_PLACES=469, PETRI_TRANSITIONS=756} [2024-06-03 18:48:04,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-03 18:48:04,955 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 756 transitions, 16232 flow [2024-06-03 18:48:04,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:04,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:04,955 INFO 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] [2024-06-03 18:48:04,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 18:48:04,955 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)] === [2024-06-03 18:48:04,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:04,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1032821650, now seen corresponding path program 1 times [2024-06-03 18:48:04,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:04,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180007400] [2024-06-03 18:48:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:04,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:05,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:05,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180007400] [2024-06-03 18:48:05,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180007400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:05,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:05,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:48:05,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747859604] [2024-06-03 18:48:05,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:05,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:48:05,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:05,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:48:05,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:48:05,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:48:05,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 756 transitions, 16232 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:05,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:05,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:48:05,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:06,317 INFO L124 PetriNetUnfolderBase]: 3014/5075 cut-off events. [2024-06-03 18:48:06,317 INFO L125 PetriNetUnfolderBase]: For 423371/423371 co-relation queries the response was YES. [2024-06-03 18:48:06,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43774 conditions, 5075 events. 3014/5075 cut-off events. For 423371/423371 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 33149 event pairs, 324 based on Foata normal form. 2/5068 useless extension candidates. Maximal degree in co-relation 43561. Up to 3223 conditions per place. [2024-06-03 18:48:06,387 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 596 selfloop transitions, 189 changer transitions 0/791 dead transitions. [2024-06-03 18:48:06,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 791 transitions, 18463 flow [2024-06-03 18:48:06,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:48:06,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:48:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-03 18:48:06,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:48:06,388 INFO L175 Difference]: Start difference. First operand has 469 places, 756 transitions, 16232 flow. Second operand 8 states and 176 transitions. [2024-06-03 18:48:06,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 791 transitions, 18463 flow [2024-06-03 18:48:08,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 791 transitions, 18362 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 18:48:08,906 INFO L231 Difference]: Finished difference. Result has 471 places, 761 transitions, 16663 flow [2024-06-03 18:48:08,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16131, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16663, PETRI_PLACES=471, PETRI_TRANSITIONS=761} [2024-06-03 18:48:08,906 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-03 18:48:08,906 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 761 transitions, 16663 flow [2024-06-03 18:48:08,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:08,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:08,906 INFO 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] [2024-06-03 18:48:08,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 18:48:08,906 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)] === [2024-06-03 18:48:08,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash -574378680, now seen corresponding path program 2 times [2024-06-03 18:48:08,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:08,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228624552] [2024-06-03 18:48:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:08,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:09,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:09,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228624552] [2024-06-03 18:48:09,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228624552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:09,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:09,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:48:09,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283026480] [2024-06-03 18:48:09,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:09,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:48:09,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:09,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:48:09,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:48:09,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:48:09,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 761 transitions, 16663 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:09,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:09,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:48:09,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:10,289 INFO L124 PetriNetUnfolderBase]: 3042/5117 cut-off events. [2024-06-03 18:48:10,289 INFO L125 PetriNetUnfolderBase]: For 451832/451832 co-relation queries the response was YES. [2024-06-03 18:48:10,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45073 conditions, 5117 events. 3042/5117 cut-off events. For 451832/451832 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 33445 event pairs, 409 based on Foata normal form. 2/5110 useless extension candidates. Maximal degree in co-relation 44857. Up to 4370 conditions per place. [2024-06-03 18:48:10,366 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 732 selfloop transitions, 45 changer transitions 0/783 dead transitions. [2024-06-03 18:48:10,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 783 transitions, 18495 flow [2024-06-03 18:48:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:48:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:48:10,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 18:48:10,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-03 18:48:10,367 INFO L175 Difference]: Start difference. First operand has 471 places, 761 transitions, 16663 flow. Second operand 8 states and 159 transitions. [2024-06-03 18:48:10,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 783 transitions, 18495 flow [2024-06-03 18:48:13,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 783 transitions, 18234 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-03 18:48:13,065 INFO L231 Difference]: Finished difference. Result has 477 places, 762 transitions, 16524 flow [2024-06-03 18:48:13,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16406, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16524, PETRI_PLACES=477, PETRI_TRANSITIONS=762} [2024-06-03 18:48:13,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-03 18:48:13,065 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 762 transitions, 16524 flow [2024-06-03 18:48:13,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:13,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:13,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:13,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 18:48:13,065 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)] === [2024-06-03 18:48:13,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:13,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2129521336, now seen corresponding path program 3 times [2024-06-03 18:48:13,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:13,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622667735] [2024-06-03 18:48:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:13,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:13,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:13,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622667735] [2024-06-03 18:48:13,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622667735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:13,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:13,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:48:13,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530338346] [2024-06-03 18:48:13,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:13,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:48:13,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:13,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:48:13,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:48:13,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:48:13,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 762 transitions, 16524 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:13,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:13,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:48:13,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:14,517 INFO L124 PetriNetUnfolderBase]: 3050/5133 cut-off events. [2024-06-03 18:48:14,517 INFO L125 PetriNetUnfolderBase]: For 451523/451523 co-relation queries the response was YES. [2024-06-03 18:48:14,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45186 conditions, 5133 events. 3050/5133 cut-off events. For 451523/451523 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 33601 event pairs, 554 based on Foata normal form. 2/5130 useless extension candidates. Maximal degree in co-relation 44967. Up to 4223 conditions per place. [2024-06-03 18:48:14,583 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 612 selfloop transitions, 174 changer transitions 0/792 dead transitions. [2024-06-03 18:48:14,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 792 transitions, 18526 flow [2024-06-03 18:48:14,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:48:14,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:48:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 18:48:14,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-03 18:48:14,584 INFO L175 Difference]: Start difference. First operand has 477 places, 762 transitions, 16524 flow. Second operand 8 states and 170 transitions. [2024-06-03 18:48:14,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 792 transitions, 18526 flow [2024-06-03 18:48:17,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 792 transitions, 18305 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 18:48:17,046 INFO L231 Difference]: Finished difference. Result has 477 places, 766 transitions, 16781 flow [2024-06-03 18:48:17,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16303, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16781, PETRI_PLACES=477, PETRI_TRANSITIONS=766} [2024-06-03 18:48:17,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-03 18:48:17,047 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 766 transitions, 16781 flow [2024-06-03 18:48:17,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:17,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:17,047 INFO 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] [2024-06-03 18:48:17,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 18:48:17,048 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)] === [2024-06-03 18:48:17,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:17,048 INFO L85 PathProgramCache]: Analyzing trace with hash 252805402, now seen corresponding path program 4 times [2024-06-03 18:48:17,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:17,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745095541] [2024-06-03 18:48:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:17,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:17,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:17,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745095541] [2024-06-03 18:48:17,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745095541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:17,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:17,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:48:17,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748662176] [2024-06-03 18:48:17,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:17,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:48:17,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:17,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:48:17,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:48:17,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:48:17,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 766 transitions, 16781 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:17,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:17,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:48:17,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:18,455 INFO L124 PetriNetUnfolderBase]: 3045/5126 cut-off events. [2024-06-03 18:48:18,455 INFO L125 PetriNetUnfolderBase]: For 450828/450828 co-relation queries the response was YES. [2024-06-03 18:48:18,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45029 conditions, 5126 events. 3045/5126 cut-off events. For 450828/450828 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 33554 event pairs, 552 based on Foata normal form. 2/5123 useless extension candidates. Maximal degree in co-relation 44809. Up to 4272 conditions per place. [2024-06-03 18:48:18,526 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 607 selfloop transitions, 174 changer transitions 0/787 dead transitions. [2024-06-03 18:48:18,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 787 transitions, 18446 flow [2024-06-03 18:48:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:48:18,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:48:18,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 18:48:18,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-03 18:48:18,527 INFO L175 Difference]: Start difference. First operand has 477 places, 766 transitions, 16781 flow. Second operand 8 states and 167 transitions. [2024-06-03 18:48:18,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 787 transitions, 18446 flow [2024-06-03 18:48:21,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 787 transitions, 18139 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-03 18:48:21,437 INFO L231 Difference]: Finished difference. Result has 481 places, 766 transitions, 16829 flow [2024-06-03 18:48:21,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16474, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16829, PETRI_PLACES=481, PETRI_TRANSITIONS=766} [2024-06-03 18:48:21,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-03 18:48:21,438 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 766 transitions, 16829 flow [2024-06-03 18:48:21,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:21,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:21,439 INFO 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] [2024-06-03 18:48:21,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 18:48:21,439 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)] === [2024-06-03 18:48:21,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:21,439 INFO L85 PathProgramCache]: Analyzing trace with hash 249091447, now seen corresponding path program 1 times [2024-06-03 18:48:21,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:21,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569628332] [2024-06-03 18:48:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:21,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:21,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:21,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569628332] [2024-06-03 18:48:21,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569628332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:21,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:21,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:48:21,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195517725] [2024-06-03 18:48:21,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:21,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:48:21,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:21,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:48:21,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:48:21,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:48:21,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 766 transitions, 16829 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:21,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:21,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:48:21,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:23,002 INFO L124 PetriNetUnfolderBase]: 3070/5164 cut-off events. [2024-06-03 18:48:23,002 INFO L125 PetriNetUnfolderBase]: For 457602/457602 co-relation queries the response was YES. [2024-06-03 18:48:23,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45787 conditions, 5164 events. 3070/5164 cut-off events. For 457602/457602 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 33856 event pairs, 562 based on Foata normal form. 1/5162 useless extension candidates. Maximal degree in co-relation 45565. Up to 4207 conditions per place. [2024-06-03 18:48:23,075 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 543 selfloop transitions, 269 changer transitions 0/818 dead transitions. [2024-06-03 18:48:23,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 818 transitions, 19751 flow [2024-06-03 18:48:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:48:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:48:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-03 18:48:23,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-03 18:48:23,076 INFO L175 Difference]: Start difference. First operand has 481 places, 766 transitions, 16829 flow. Second operand 11 states and 241 transitions. [2024-06-03 18:48:23,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 818 transitions, 19751 flow [2024-06-03 18:48:25,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 818 transitions, 19273 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 18:48:25,641 INFO L231 Difference]: Finished difference. Result has 487 places, 782 transitions, 17512 flow [2024-06-03 18:48:25,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16386, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17512, PETRI_PLACES=487, PETRI_TRANSITIONS=782} [2024-06-03 18:48:25,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-03 18:48:25,642 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 782 transitions, 17512 flow [2024-06-03 18:48:25,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:25,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:25,642 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] [2024-06-03 18:48:25,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 18:48:25,642 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)] === [2024-06-03 18:48:25,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1320088257, now seen corresponding path program 2 times [2024-06-03 18:48:25,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:25,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383253355] [2024-06-03 18:48:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:25,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:25,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:25,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383253355] [2024-06-03 18:48:25,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383253355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:25,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:25,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:48:25,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782913588] [2024-06-03 18:48:25,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:25,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:48:25,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:25,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:48:25,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:48:25,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:48:25,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 782 transitions, 17512 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:25,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:25,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:48:25,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:27,368 INFO L124 PetriNetUnfolderBase]: 3088/5195 cut-off events. [2024-06-03 18:48:27,369 INFO L125 PetriNetUnfolderBase]: For 473011/473011 co-relation queries the response was YES. [2024-06-03 18:48:27,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46483 conditions, 5195 events. 3088/5195 cut-off events. For 473011/473011 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 34075 event pairs, 567 based on Foata normal form. 1/5193 useless extension candidates. Maximal degree in co-relation 46258. Up to 4226 conditions per place. [2024-06-03 18:48:27,436 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 551 selfloop transitions, 271 changer transitions 0/828 dead transitions. [2024-06-03 18:48:27,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 828 transitions, 20259 flow [2024-06-03 18:48:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:48:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:48:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-03 18:48:27,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-03 18:48:27,437 INFO L175 Difference]: Start difference. First operand has 487 places, 782 transitions, 17512 flow. Second operand 12 states and 261 transitions. [2024-06-03 18:48:27,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 828 transitions, 20259 flow [2024-06-03 18:48:29,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 828 transitions, 19957 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 18:48:29,855 INFO L231 Difference]: Finished difference. Result has 495 places, 791 transitions, 17995 flow [2024-06-03 18:48:29,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17218, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17995, PETRI_PLACES=495, PETRI_TRANSITIONS=791} [2024-06-03 18:48:29,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-03 18:48:29,855 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 791 transitions, 17995 flow [2024-06-03 18:48:29,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:29,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:29,856 INFO 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] [2024-06-03 18:48:29,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 18:48:29,856 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)] === [2024-06-03 18:48:29,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:29,856 INFO L85 PathProgramCache]: Analyzing trace with hash -515891211, now seen corresponding path program 3 times [2024-06-03 18:48:29,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:29,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288019938] [2024-06-03 18:48:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:29,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:30,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:30,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288019938] [2024-06-03 18:48:30,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288019938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:30,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:30,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:48:30,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423371362] [2024-06-03 18:48:30,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:30,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:48:30,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:30,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:48:30,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:48:30,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:48:30,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 791 transitions, 17995 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:30,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:30,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:48:30,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:31,418 INFO L124 PetriNetUnfolderBase]: 3085/5191 cut-off events. [2024-06-03 18:48:31,419 INFO L125 PetriNetUnfolderBase]: For 479617/479617 co-relation queries the response was YES. [2024-06-03 18:48:31,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46561 conditions, 5191 events. 3085/5191 cut-off events. For 479617/479617 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 34064 event pairs, 567 based on Foata normal form. 1/5189 useless extension candidates. Maximal degree in co-relation 46334. Up to 4223 conditions per place. [2024-06-03 18:48:31,493 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 549 selfloop transitions, 274 changer transitions 0/829 dead transitions. [2024-06-03 18:48:31,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 829 transitions, 20351 flow [2024-06-03 18:48:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 18:48:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 18:48:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 294 transitions. [2024-06-03 18:48:31,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 18:48:31,494 INFO L175 Difference]: Start difference. First operand has 495 places, 791 transitions, 17995 flow. Second operand 14 states and 294 transitions. [2024-06-03 18:48:31,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 829 transitions, 20351 flow [2024-06-03 18:48:34,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 829 transitions, 19783 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-03 18:48:34,068 INFO L231 Difference]: Finished difference. Result has 499 places, 791 transitions, 17989 flow [2024-06-03 18:48:34,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17427, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=17989, PETRI_PLACES=499, PETRI_TRANSITIONS=791} [2024-06-03 18:48:34,068 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-03 18:48:34,068 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 791 transitions, 17989 flow [2024-06-03 18:48:34,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:34,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:34,069 INFO 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] [2024-06-03 18:48:34,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 18:48:34,069 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)] === [2024-06-03 18:48:34,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:34,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1450127888, now seen corresponding path program 5 times [2024-06-03 18:48:34,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:34,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718095222] [2024-06-03 18:48:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:34,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:34,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:34,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718095222] [2024-06-03 18:48:34,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718095222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:34,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:34,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:48:34,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212610016] [2024-06-03 18:48:34,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:34,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:48:34,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:34,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:48:34,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:48:34,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:48:34,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 791 transitions, 17989 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:34,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:34,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:48:34,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:35,712 INFO L124 PetriNetUnfolderBase]: 3093/5168 cut-off events. [2024-06-03 18:48:35,712 INFO L125 PetriNetUnfolderBase]: For 499063/499063 co-relation queries the response was YES. [2024-06-03 18:48:35,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46741 conditions, 5168 events. 3093/5168 cut-off events. For 499063/499063 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 33624 event pairs, 626 based on Foata normal form. 2/5132 useless extension candidates. Maximal degree in co-relation 46513. Up to 4042 conditions per place. [2024-06-03 18:48:35,786 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 553 selfloop transitions, 263 changer transitions 0/822 dead transitions. [2024-06-03 18:48:35,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 822 transitions, 20083 flow [2024-06-03 18:48:35,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:48:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:48:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-03 18:48:35,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-03 18:48:35,787 INFO L175 Difference]: Start difference. First operand has 499 places, 791 transitions, 17989 flow. Second operand 8 states and 169 transitions. [2024-06-03 18:48:35,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 822 transitions, 20083 flow [2024-06-03 18:48:38,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 822 transitions, 19728 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 18:48:38,220 INFO L231 Difference]: Finished difference. Result has 499 places, 795 transitions, 18289 flow [2024-06-03 18:48:38,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17634, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18289, PETRI_PLACES=499, PETRI_TRANSITIONS=795} [2024-06-03 18:48:38,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-03 18:48:38,221 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 795 transitions, 18289 flow [2024-06-03 18:48:38,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:38,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:38,222 INFO 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] [2024-06-03 18:48:38,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 18:48:38,222 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)] === [2024-06-03 18:48:38,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:38,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1820349304, now seen corresponding path program 6 times [2024-06-03 18:48:38,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:38,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160870106] [2024-06-03 18:48:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:38,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:38,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:38,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160870106] [2024-06-03 18:48:38,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160870106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:38,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:38,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:48:38,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160041257] [2024-06-03 18:48:38,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:38,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:48:38,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:38,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:48:38,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:48:38,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:48:38,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 795 transitions, 18289 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:38,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:38,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:48:38,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:39,710 INFO L124 PetriNetUnfolderBase]: 3101/5185 cut-off events. [2024-06-03 18:48:39,710 INFO L125 PetriNetUnfolderBase]: For 512771/512771 co-relation queries the response was YES. [2024-06-03 18:48:39,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47179 conditions, 5185 events. 3101/5185 cut-off events. For 512771/512771 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 33864 event pairs, 632 based on Foata normal form. 2/5154 useless extension candidates. Maximal degree in co-relation 46950. Up to 4111 conditions per place. [2024-06-03 18:48:39,787 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 551 selfloop transitions, 262 changer transitions 0/819 dead transitions. [2024-06-03 18:48:39,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 819 transitions, 20103 flow [2024-06-03 18:48:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:48:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:48:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-03 18:48:39,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 18:48:39,788 INFO L175 Difference]: Start difference. First operand has 499 places, 795 transitions, 18289 flow. Second operand 8 states and 164 transitions. [2024-06-03 18:48:39,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 819 transitions, 20103 flow [2024-06-03 18:48:42,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 819 transitions, 19678 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-03 18:48:42,781 INFO L231 Difference]: Finished difference. Result has 502 places, 797 transitions, 18463 flow [2024-06-03 18:48:42,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17888, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18463, PETRI_PLACES=502, PETRI_TRANSITIONS=797} [2024-06-03 18:48:42,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-03 18:48:42,782 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 797 transitions, 18463 flow [2024-06-03 18:48:42,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:42,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:42,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:42,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 18:48:42,783 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)] === [2024-06-03 18:48:42,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:42,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2107236634, now seen corresponding path program 7 times [2024-06-03 18:48:42,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:42,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916407005] [2024-06-03 18:48:42,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:42,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:42,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:42,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916407005] [2024-06-03 18:48:42,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916407005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:42,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:42,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:48:42,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246656254] [2024-06-03 18:48:42,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:42,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:48:42,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:42,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:48:42,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:48:43,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:48:43,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 797 transitions, 18463 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:43,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:43,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:48:43,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:44,314 INFO L124 PetriNetUnfolderBase]: 3109/5198 cut-off events. [2024-06-03 18:48:44,314 INFO L125 PetriNetUnfolderBase]: For 519381/519381 co-relation queries the response was YES. [2024-06-03 18:48:44,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47669 conditions, 5198 events. 3109/5198 cut-off events. For 519381/519381 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 33922 event pairs, 629 based on Foata normal form. 2/5168 useless extension candidates. Maximal degree in co-relation 47438. Up to 4123 conditions per place. [2024-06-03 18:48:44,389 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 552 selfloop transitions, 260 changer transitions 0/818 dead transitions. [2024-06-03 18:48:44,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 818 transitions, 20241 flow [2024-06-03 18:48:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:48:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:48:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-03 18:48:44,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49390243902439024 [2024-06-03 18:48:44,390 INFO L175 Difference]: Start difference. First operand has 502 places, 797 transitions, 18463 flow. Second operand 8 states and 162 transitions. [2024-06-03 18:48:44,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 818 transitions, 20241 flow [2024-06-03 18:48:47,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 818 transitions, 19690 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 18:48:47,285 INFO L231 Difference]: Finished difference. Result has 504 places, 799 transitions, 18487 flow [2024-06-03 18:48:47,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17912, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18487, PETRI_PLACES=504, PETRI_TRANSITIONS=799} [2024-06-03 18:48:47,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-03 18:48:47,285 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 799 transitions, 18487 flow [2024-06-03 18:48:47,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:47,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:47,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:47,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 18:48:47,286 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)] === [2024-06-03 18:48:47,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:47,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1655717578, now seen corresponding path program 8 times [2024-06-03 18:48:47,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:47,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380469394] [2024-06-03 18:48:47,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:47,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:47,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:47,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380469394] [2024-06-03 18:48:47,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380469394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:47,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:47,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:48:47,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285844227] [2024-06-03 18:48:47,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:47,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:48:47,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:48:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:48:47,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:48:47,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 799 transitions, 18487 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:47,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:47,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:48:47,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:48,935 INFO L124 PetriNetUnfolderBase]: 3104/5222 cut-off events. [2024-06-03 18:48:48,935 INFO L125 PetriNetUnfolderBase]: For 509830/509830 co-relation queries the response was YES. [2024-06-03 18:48:48,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47468 conditions, 5222 events. 3104/5222 cut-off events. For 509830/509830 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 34321 event pairs, 572 based on Foata normal form. 2/5219 useless extension candidates. Maximal degree in co-relation 47236. Up to 4558 conditions per place. [2024-06-03 18:48:49,002 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 717 selfloop transitions, 89 changer transitions 0/812 dead transitions. [2024-06-03 18:48:49,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 812 transitions, 20135 flow [2024-06-03 18:48:49,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:48:49,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:48:49,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 18:48:49,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-03 18:48:49,003 INFO L175 Difference]: Start difference. First operand has 504 places, 799 transitions, 18487 flow. Second operand 9 states and 174 transitions. [2024-06-03 18:48:49,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 812 transitions, 20135 flow [2024-06-03 18:48:51,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 812 transitions, 19554 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 18:48:51,275 INFO L231 Difference]: Finished difference. Result has 507 places, 799 transitions, 18091 flow [2024-06-03 18:48:51,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17906, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18091, PETRI_PLACES=507, PETRI_TRANSITIONS=799} [2024-06-03 18:48:51,275 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-03 18:48:51,275 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 799 transitions, 18091 flow [2024-06-03 18:48:51,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:51,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:51,276 INFO 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] [2024-06-03 18:48:51,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 18:48:51,276 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)] === [2024-06-03 18:48:51,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:51,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1929819963, now seen corresponding path program 4 times [2024-06-03 18:48:51,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:51,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833467336] [2024-06-03 18:48:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:51,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:51,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:51,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833467336] [2024-06-03 18:48:51,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833467336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:51,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:51,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:48:51,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223308169] [2024-06-03 18:48:51,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:51,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:48:51,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:51,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:48:51,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:48:51,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:48:51,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 799 transitions, 18091 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:51,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:51,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:48:51,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:52,884 INFO L124 PetriNetUnfolderBase]: 3147/5285 cut-off events. [2024-06-03 18:48:52,884 INFO L125 PetriNetUnfolderBase]: For 524351/524351 co-relation queries the response was YES. [2024-06-03 18:48:52,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47715 conditions, 5285 events. 3147/5285 cut-off events. For 524351/524351 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 34772 event pairs, 583 based on Foata normal form. 1/5266 useless extension candidates. Maximal degree in co-relation 47482. Up to 3761 conditions per place. [2024-06-03 18:48:52,965 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 393 selfloop transitions, 473 changer transitions 0/872 dead transitions. [2024-06-03 18:48:52,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 872 transitions, 21269 flow [2024-06-03 18:48:52,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 18:48:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 18:48:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 287 transitions. [2024-06-03 18:48:52,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 18:48:52,966 INFO L175 Difference]: Start difference. First operand has 507 places, 799 transitions, 18091 flow. Second operand 14 states and 287 transitions. [2024-06-03 18:48:52,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 872 transitions, 21269 flow [2024-06-03 18:48:55,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 872 transitions, 21076 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 18:48:55,811 INFO L231 Difference]: Finished difference. Result has 515 places, 820 transitions, 19255 flow [2024-06-03 18:48:55,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17898, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=19255, PETRI_PLACES=515, PETRI_TRANSITIONS=820} [2024-06-03 18:48:55,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 473 predicate places. [2024-06-03 18:48:55,812 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 820 transitions, 19255 flow [2024-06-03 18:48:55,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:55,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:55,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:55,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 18:48:55,812 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)] === [2024-06-03 18:48:55,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:55,812 INFO L85 PathProgramCache]: Analyzing trace with hash -869564327, now seen corresponding path program 5 times [2024-06-03 18:48:55,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:55,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067524255] [2024-06-03 18:48:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:55,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:55,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:55,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067524255] [2024-06-03 18:48:55,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067524255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:55,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:55,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:48:55,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560789281] [2024-06-03 18:48:55,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:55,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:48:55,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:55,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:48:55,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:48:56,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:48:56,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 820 transitions, 19255 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:56,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:56,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:48:56,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:57,512 INFO L124 PetriNetUnfolderBase]: 3160/5303 cut-off events. [2024-06-03 18:48:57,512 INFO L125 PetriNetUnfolderBase]: For 545412/545412 co-relation queries the response was YES. [2024-06-03 18:48:57,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49009 conditions, 5303 events. 3160/5303 cut-off events. For 545412/545412 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 34904 event pairs, 590 based on Foata normal form. 1/5282 useless extension candidates. Maximal degree in co-relation 48774. Up to 3776 conditions per place. [2024-06-03 18:48:57,594 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 391 selfloop transitions, 479 changer transitions 0/876 dead transitions. [2024-06-03 18:48:57,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 876 transitions, 22200 flow [2024-06-03 18:48:57,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 18:48:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 18:48:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 299 transitions. [2024-06-03 18:48:57,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861788617886179 [2024-06-03 18:48:57,595 INFO L175 Difference]: Start difference. First operand has 515 places, 820 transitions, 19255 flow. Second operand 15 states and 299 transitions. [2024-06-03 18:48:57,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 876 transitions, 22200 flow [2024-06-03 18:49:00,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 876 transitions, 21094 flow, removed 75 selfloop flow, removed 9 redundant places. [2024-06-03 18:49:00,985 INFO L231 Difference]: Finished difference. Result has 521 places, 826 transitions, 19263 flow [2024-06-03 18:49:00,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18217, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=473, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=19263, PETRI_PLACES=521, PETRI_TRANSITIONS=826} [2024-06-03 18:49:00,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 479 predicate places. [2024-06-03 18:49:00,985 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 826 transitions, 19263 flow [2024-06-03 18:49:00,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:00,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:00,986 INFO 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] [2024-06-03 18:49:00,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 18:49:00,986 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)] === [2024-06-03 18:49:00,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:00,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1441546313, now seen corresponding path program 6 times [2024-06-03 18:49:00,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:00,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624149379] [2024-06-03 18:49:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:00,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:01,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:01,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624149379] [2024-06-03 18:49:01,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624149379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:01,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:01,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:49:01,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234089545] [2024-06-03 18:49:01,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:01,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:49:01,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:01,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:49:01,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:49:01,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:49:01,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 826 transitions, 19263 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:01,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:01,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:49:01,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:02,733 INFO L124 PetriNetUnfolderBase]: 3157/5299 cut-off events. [2024-06-03 18:49:02,733 INFO L125 PetriNetUnfolderBase]: For 546508/546508 co-relation queries the response was YES. [2024-06-03 18:49:02,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48774 conditions, 5299 events. 3157/5299 cut-off events. For 546508/546508 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 34943 event pairs, 590 based on Foata normal form. 1/5278 useless extension candidates. Maximal degree in co-relation 48538. Up to 3773 conditions per place. [2024-06-03 18:49:02,815 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 390 selfloop transitions, 479 changer transitions 0/875 dead transitions. [2024-06-03 18:49:02,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 875 transitions, 21848 flow [2024-06-03 18:49:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 18:49:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 18:49:02,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 298 transitions. [2024-06-03 18:49:02,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845528455284553 [2024-06-03 18:49:02,816 INFO L175 Difference]: Start difference. First operand has 521 places, 826 transitions, 19263 flow. Second operand 15 states and 298 transitions. [2024-06-03 18:49:02,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 875 transitions, 21848 flow [2024-06-03 18:49:06,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 875 transitions, 21273 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 18:49:06,282 INFO L231 Difference]: Finished difference. Result has 529 places, 826 transitions, 19652 flow [2024-06-03 18:49:06,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18688, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=19652, PETRI_PLACES=529, PETRI_TRANSITIONS=826} [2024-06-03 18:49:06,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 487 predicate places. [2024-06-03 18:49:06,283 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 826 transitions, 19652 flow [2024-06-03 18:49:06,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:06,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:06,283 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] [2024-06-03 18:49:06,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 18:49:06,284 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)] === [2024-06-03 18:49:06,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:06,284 INFO L85 PathProgramCache]: Analyzing trace with hash -975819345, now seen corresponding path program 7 times [2024-06-03 18:49:06,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:06,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432719169] [2024-06-03 18:49:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:06,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:06,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:06,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432719169] [2024-06-03 18:49:06,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432719169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:06,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:06,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:49:06,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653069357] [2024-06-03 18:49:06,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:06,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:49:06,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:06,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:49:06,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:49:06,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:49:06,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 826 transitions, 19652 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:06,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:06,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:49:06,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:07,938 INFO L124 PetriNetUnfolderBase]: 3221/5427 cut-off events. [2024-06-03 18:49:07,939 INFO L125 PetriNetUnfolderBase]: For 577998/578007 co-relation queries the response was YES. [2024-06-03 18:49:07,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50210 conditions, 5427 events. 3221/5427 cut-off events. For 577998/578007 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 36057 event pairs, 575 based on Foata normal form. 7/5417 useless extension candidates. Maximal degree in co-relation 49971. Up to 3833 conditions per place. [2024-06-03 18:49:08,023 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 373 selfloop transitions, 525 changer transitions 0/904 dead transitions. [2024-06-03 18:49:08,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 904 transitions, 23337 flow [2024-06-03 18:49:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:49:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:49:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-03 18:49:08,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 18:49:08,024 INFO L175 Difference]: Start difference. First operand has 529 places, 826 transitions, 19652 flow. Second operand 12 states and 252 transitions. [2024-06-03 18:49:08,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 904 transitions, 23337 flow [2024-06-03 18:49:11,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 904 transitions, 22473 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-03 18:49:11,364 INFO L231 Difference]: Finished difference. Result has 530 places, 861 transitions, 20747 flow [2024-06-03 18:49:11,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=18823, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20747, PETRI_PLACES=530, PETRI_TRANSITIONS=861} [2024-06-03 18:49:11,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-03 18:49:11,365 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 861 transitions, 20747 flow [2024-06-03 18:49:11,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:11,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:11,365 INFO 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] [2024-06-03 18:49:11,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 18:49:11,365 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)] === [2024-06-03 18:49:11,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:11,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1008494369, now seen corresponding path program 8 times [2024-06-03 18:49:11,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:11,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341481064] [2024-06-03 18:49:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:11,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:11,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:11,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341481064] [2024-06-03 18:49:11,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341481064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:11,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:11,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:49:11,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971881437] [2024-06-03 18:49:11,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:11,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:49:11,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:11,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:49:11,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:49:11,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:49:11,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 861 transitions, 20747 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:11,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:11,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:49:11,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:13,129 INFO L124 PetriNetUnfolderBase]: 3242/5462 cut-off events. [2024-06-03 18:49:13,129 INFO L125 PetriNetUnfolderBase]: For 603267/603276 co-relation queries the response was YES. [2024-06-03 18:49:13,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51390 conditions, 5462 events. 3242/5462 cut-off events. For 603267/603276 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 36353 event pairs, 575 based on Foata normal form. 7/5452 useless extension candidates. Maximal degree in co-relation 51146. Up to 3857 conditions per place. [2024-06-03 18:49:13,213 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 379 selfloop transitions, 527 changer transitions 0/912 dead transitions. [2024-06-03 18:49:13,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 912 transitions, 24237 flow [2024-06-03 18:49:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:49:13,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:49:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 269 transitions. [2024-06-03 18:49:13,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046904315196998 [2024-06-03 18:49:13,214 INFO L175 Difference]: Start difference. First operand has 530 places, 861 transitions, 20747 flow. Second operand 13 states and 269 transitions. [2024-06-03 18:49:13,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 912 transitions, 24237 flow [2024-06-03 18:49:17,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 912 transitions, 23590 flow, removed 83 selfloop flow, removed 2 redundant places. [2024-06-03 18:49:17,252 INFO L231 Difference]: Finished difference. Result has 542 places, 872 transitions, 21518 flow [2024-06-03 18:49:17,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=20169, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=516, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=21518, PETRI_PLACES=542, PETRI_TRANSITIONS=872} [2024-06-03 18:49:17,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 500 predicate places. [2024-06-03 18:49:17,253 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 872 transitions, 21518 flow [2024-06-03 18:49:17,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:17,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:17,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:17,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 18:49:17,254 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)] === [2024-06-03 18:49:17,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:17,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1008483209, now seen corresponding path program 9 times [2024-06-03 18:49:17,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:17,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759373812] [2024-06-03 18:49:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:17,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:17,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:17,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759373812] [2024-06-03 18:49:17,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759373812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:17,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:17,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:49:17,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542833637] [2024-06-03 18:49:17,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:17,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:49:17,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:17,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:49:17,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:49:17,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:49:17,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 872 transitions, 21518 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:17,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:17,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:49:17,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:18,934 INFO L124 PetriNetUnfolderBase]: 3239/5458 cut-off events. [2024-06-03 18:49:18,934 INFO L125 PetriNetUnfolderBase]: For 613488/613497 co-relation queries the response was YES. [2024-06-03 18:49:18,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51622 conditions, 5458 events. 3239/5458 cut-off events. For 613488/613497 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 36308 event pairs, 575 based on Foata normal form. 7/5448 useless extension candidates. Maximal degree in co-relation 51375. Up to 3854 conditions per place. [2024-06-03 18:49:19,020 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 378 selfloop transitions, 525 changer transitions 0/909 dead transitions. [2024-06-03 18:49:19,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 909 transitions, 24529 flow [2024-06-03 18:49:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:49:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:49:19,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 18:49:19,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-03 18:49:19,021 INFO L175 Difference]: Start difference. First operand has 542 places, 872 transitions, 21518 flow. Second operand 11 states and 236 transitions. [2024-06-03 18:49:19,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 909 transitions, 24529 flow [2024-06-03 18:49:23,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 909 transitions, 23545 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 18:49:23,154 INFO L231 Difference]: Finished difference. Result has 548 places, 872 transitions, 21593 flow [2024-06-03 18:49:23,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=20536, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21593, PETRI_PLACES=548, PETRI_TRANSITIONS=872} [2024-06-03 18:49:23,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 506 predicate places. [2024-06-03 18:49:23,154 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 872 transitions, 21593 flow [2024-06-03 18:49:23,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:23,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:23,155 INFO 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] [2024-06-03 18:49:23,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 18:49:23,155 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)] === [2024-06-03 18:49:23,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:23,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1459588068, now seen corresponding path program 1 times [2024-06-03 18:49:23,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:23,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988150510] [2024-06-03 18:49:23,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:23,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:23,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:23,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988150510] [2024-06-03 18:49:23,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988150510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:23,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:23,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:49:23,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817777803] [2024-06-03 18:49:23,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:23,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:49:23,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:23,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:49:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:49:23,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:49:23,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 872 transitions, 21593 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:23,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:23,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:49:23,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:25,097 INFO L124 PetriNetUnfolderBase]: 3247/5464 cut-off events. [2024-06-03 18:49:25,098 INFO L125 PetriNetUnfolderBase]: For 631101/631101 co-relation queries the response was YES. [2024-06-03 18:49:25,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51794 conditions, 5464 events. 3247/5464 cut-off events. For 631101/631101 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 36365 event pairs, 744 based on Foata normal form. 2/5455 useless extension candidates. Maximal degree in co-relation 51545. Up to 4530 conditions per place. [2024-06-03 18:49:25,175 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 644 selfloop transitions, 250 changer transitions 0/900 dead transitions. [2024-06-03 18:49:25,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 900 transitions, 23633 flow [2024-06-03 18:49:25,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:49:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:49:25,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-03 18:49:25,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49889135254988914 [2024-06-03 18:49:25,176 INFO L175 Difference]: Start difference. First operand has 548 places, 872 transitions, 21593 flow. Second operand 11 states and 225 transitions. [2024-06-03 18:49:25,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 900 transitions, 23633 flow [2024-06-03 18:49:29,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 900 transitions, 22778 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 18:49:29,421 INFO L231 Difference]: Finished difference. Result has 551 places, 874 transitions, 21308 flow [2024-06-03 18:49:29,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=20738, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21308, PETRI_PLACES=551, PETRI_TRANSITIONS=874} [2024-06-03 18:49:29,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 509 predicate places. [2024-06-03 18:49:29,421 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 874 transitions, 21308 flow [2024-06-03 18:49:29,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:29,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:29,422 INFO 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] [2024-06-03 18:49:29,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 18:49:29,422 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)] === [2024-06-03 18:49:29,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:29,422 INFO L85 PathProgramCache]: Analyzing trace with hash -582325457, now seen corresponding path program 10 times [2024-06-03 18:49:29,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:29,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891966506] [2024-06-03 18:49:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:29,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:29,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:29,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891966506] [2024-06-03 18:49:29,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891966506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:29,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:29,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:49:29,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562249376] [2024-06-03 18:49:29,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:29,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:49:29,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:29,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:49:29,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:49:29,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:49:29,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 874 transitions, 21308 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:29,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:29,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:49:29,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:31,568 INFO L124 PetriNetUnfolderBase]: 3252/5460 cut-off events. [2024-06-03 18:49:31,568 INFO L125 PetriNetUnfolderBase]: For 632653/632653 co-relation queries the response was YES. [2024-06-03 18:49:31,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51499 conditions, 5460 events. 3252/5460 cut-off events. For 632653/632653 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 36166 event pairs, 602 based on Foata normal form. 1/5439 useless extension candidates. Maximal degree in co-relation 51249. Up to 3872 conditions per place. [2024-06-03 18:49:31,644 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 392 selfloop transitions, 515 changer transitions 0/913 dead transitions. [2024-06-03 18:49:31,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 913 transitions, 23945 flow [2024-06-03 18:49:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:49:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:49:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-06-03 18:49:31,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508130081300813 [2024-06-03 18:49:31,646 INFO L175 Difference]: Start difference. First operand has 551 places, 874 transitions, 21308 flow. Second operand 12 states and 250 transitions. [2024-06-03 18:49:31,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 913 transitions, 23945 flow [2024-06-03 18:49:35,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 913 transitions, 23444 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-03 18:49:35,597 INFO L231 Difference]: Finished difference. Result has 555 places, 877 transitions, 21897 flow [2024-06-03 18:49:35,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=20811, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=874, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21897, PETRI_PLACES=555, PETRI_TRANSITIONS=877} [2024-06-03 18:49:35,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 513 predicate places. [2024-06-03 18:49:35,598 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 877 transitions, 21897 flow [2024-06-03 18:49:35,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:35,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:35,598 INFO 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] [2024-06-03 18:49:35,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 18:49:35,598 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)] === [2024-06-03 18:49:35,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:35,599 INFO L85 PathProgramCache]: Analyzing trace with hash -853461817, now seen corresponding path program 11 times [2024-06-03 18:49:35,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:35,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349070918] [2024-06-03 18:49:35,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:35,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:35,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:35,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349070918] [2024-06-03 18:49:35,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349070918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:35,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:35,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:49:35,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481895248] [2024-06-03 18:49:35,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:35,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:49:35,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:35,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:49:35,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:49:35,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:49:35,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 877 transitions, 21897 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:35,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:35,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:49:35,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:37,760 INFO L124 PetriNetUnfolderBase]: 3286/5521 cut-off events. [2024-06-03 18:49:37,760 INFO L125 PetriNetUnfolderBase]: For 656537/656537 co-relation queries the response was YES. [2024-06-03 18:49:37,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52744 conditions, 5521 events. 3286/5521 cut-off events. For 656537/656537 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 36688 event pairs, 597 based on Foata normal form. 1/5500 useless extension candidates. Maximal degree in co-relation 52492. Up to 3909 conditions per place. [2024-06-03 18:49:37,950 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 396 selfloop transitions, 530 changer transitions 0/932 dead transitions. [2024-06-03 18:49:37,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 932 transitions, 25260 flow [2024-06-03 18:49:37,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 18:49:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 18:49:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 290 transitions. [2024-06-03 18:49:37,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052264808362369 [2024-06-03 18:49:37,951 INFO L175 Difference]: Start difference. First operand has 555 places, 877 transitions, 21897 flow. Second operand 14 states and 290 transitions. [2024-06-03 18:49:37,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 932 transitions, 25260 flow [2024-06-03 18:49:41,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 932 transitions, 24376 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-03 18:49:41,799 INFO L231 Difference]: Finished difference. Result has 560 places, 892 transitions, 22365 flow [2024-06-03 18:49:41,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21030, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=22365, PETRI_PLACES=560, PETRI_TRANSITIONS=892} [2024-06-03 18:49:41,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 518 predicate places. [2024-06-03 18:49:41,800 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 892 transitions, 22365 flow [2024-06-03 18:49:41,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:41,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:41,800 INFO 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] [2024-06-03 18:49:41,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 18:49:41,800 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)] === [2024-06-03 18:49:41,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:41,801 INFO L85 PathProgramCache]: Analyzing trace with hash -582504017, now seen corresponding path program 12 times [2024-06-03 18:49:41,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:41,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138199014] [2024-06-03 18:49:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:41,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:41,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138199014] [2024-06-03 18:49:41,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138199014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:41,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:41,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:49:41,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832848054] [2024-06-03 18:49:41,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:41,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:49:41,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:41,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:49:41,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:49:42,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:49:42,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 892 transitions, 22365 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:42,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:42,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:49:42,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:43,927 INFO L124 PetriNetUnfolderBase]: 3283/5517 cut-off events. [2024-06-03 18:49:43,927 INFO L125 PetriNetUnfolderBase]: For 662071/662071 co-relation queries the response was YES. [2024-06-03 18:49:44,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52792 conditions, 5517 events. 3283/5517 cut-off events. For 662071/662071 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 36643 event pairs, 597 based on Foata normal form. 1/5496 useless extension candidates. Maximal degree in co-relation 52539. Up to 3906 conditions per place. [2024-06-03 18:49:44,181 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 395 selfloop transitions, 532 changer transitions 0/933 dead transitions. [2024-06-03 18:49:44,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 933 transitions, 25454 flow [2024-06-03 18:49:44,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 18:49:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 18:49:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 304 transitions. [2024-06-03 18:49:44,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943089430894309 [2024-06-03 18:49:44,182 INFO L175 Difference]: Start difference. First operand has 560 places, 892 transitions, 22365 flow. Second operand 15 states and 304 transitions. [2024-06-03 18:49:44,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 933 transitions, 25454 flow [2024-06-03 18:49:48,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 933 transitions, 24526 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-03 18:49:48,327 INFO L231 Difference]: Finished difference. Result has 566 places, 892 transitions, 22507 flow [2024-06-03 18:49:48,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21437, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=532, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22507, PETRI_PLACES=566, PETRI_TRANSITIONS=892} [2024-06-03 18:49:48,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 524 predicate places. [2024-06-03 18:49:48,327 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 892 transitions, 22507 flow [2024-06-03 18:49:48,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:48,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:48,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:48,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 18:49:48,328 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)] === [2024-06-03 18:49:48,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:48,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1154307443, now seen corresponding path program 13 times [2024-06-03 18:49:48,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:48,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726397991] [2024-06-03 18:49:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:48,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:48,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:48,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726397991] [2024-06-03 18:49:48,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726397991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:48,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:48,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:49:48,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116380893] [2024-06-03 18:49:48,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:48,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:49:48,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:48,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:49:48,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:49:48,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:49:48,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 892 transitions, 22507 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:48,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:48,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:49:48,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:50,579 INFO L124 PetriNetUnfolderBase]: 3280/5513 cut-off events. [2024-06-03 18:49:50,579 INFO L125 PetriNetUnfolderBase]: For 667292/667292 co-relation queries the response was YES. [2024-06-03 18:49:50,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52777 conditions, 5513 events. 3280/5513 cut-off events. For 667292/667292 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 36597 event pairs, 597 based on Foata normal form. 1/5492 useless extension candidates. Maximal degree in co-relation 52524. Up to 3903 conditions per place. [2024-06-03 18:49:50,657 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 396 selfloop transitions, 530 changer transitions 0/932 dead transitions. [2024-06-03 18:49:50,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 932 transitions, 25600 flow [2024-06-03 18:49:50,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 18:49:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 18:49:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 290 transitions. [2024-06-03 18:49:50,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052264808362369 [2024-06-03 18:49:50,658 INFO L175 Difference]: Start difference. First operand has 566 places, 892 transitions, 22507 flow. Second operand 14 states and 290 transitions. [2024-06-03 18:49:50,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 932 transitions, 25600 flow [2024-06-03 18:49:55,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 932 transitions, 24716 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-03 18:49:55,040 INFO L231 Difference]: Finished difference. Result has 571 places, 892 transitions, 22689 flow [2024-06-03 18:49:55,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21623, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=530, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=22689, PETRI_PLACES=571, PETRI_TRANSITIONS=892} [2024-06-03 18:49:55,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 529 predicate places. [2024-06-03 18:49:55,041 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 892 transitions, 22689 flow [2024-06-03 18:49:55,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:55,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:55,041 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, 1] [2024-06-03 18:49:55,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 18:49:55,041 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)] === [2024-06-03 18:49:55,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:55,042 INFO L85 PathProgramCache]: Analyzing trace with hash -582671417, now seen corresponding path program 14 times [2024-06-03 18:49:55,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:55,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844141995] [2024-06-03 18:49:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:55,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:55,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:55,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844141995] [2024-06-03 18:49:55,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844141995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:55,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:55,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:49:55,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576782174] [2024-06-03 18:49:55,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:55,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:49:55,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:55,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:49:55,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:49:55,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:49:55,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 892 transitions, 22689 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:55,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:55,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:49:55,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:57,277 INFO L124 PetriNetUnfolderBase]: 3277/5506 cut-off events. [2024-06-03 18:49:57,277 INFO L125 PetriNetUnfolderBase]: For 675182/675182 co-relation queries the response was YES. [2024-06-03 18:49:57,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52782 conditions, 5506 events. 3277/5506 cut-off events. For 675182/675182 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 36555 event pairs, 602 based on Foata normal form. 1/5485 useless extension candidates. Maximal degree in co-relation 52527. Up to 3900 conditions per place. [2024-06-03 18:49:57,354 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 397 selfloop transitions, 531 changer transitions 0/934 dead transitions. [2024-06-03 18:49:57,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 934 transitions, 25570 flow [2024-06-03 18:49:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-03 18:49:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-03 18:49:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 331 transitions. [2024-06-03 18:49:57,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748923959827834 [2024-06-03 18:49:57,355 INFO L175 Difference]: Start difference. First operand has 571 places, 892 transitions, 22689 flow. Second operand 17 states and 331 transitions. [2024-06-03 18:49:57,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 934 transitions, 25570 flow [2024-06-03 18:50:01,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 934 transitions, 24496 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-03 18:50:01,812 INFO L231 Difference]: Finished difference. Result has 575 places, 892 transitions, 22683 flow [2024-06-03 18:50:01,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21615, PETRI_DIFFERENCE_MINUEND_PLACES=558, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=22683, PETRI_PLACES=575, PETRI_TRANSITIONS=892} [2024-06-03 18:50:01,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 533 predicate places. [2024-06-03 18:50:01,812 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 892 transitions, 22683 flow [2024-06-03 18:50:01,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:01,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:01,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:01,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 18:50:01,813 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)] === [2024-06-03 18:50:01,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:01,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1154664563, now seen corresponding path program 15 times [2024-06-03 18:50:01,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:01,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898569331] [2024-06-03 18:50:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:01,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:01,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:01,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898569331] [2024-06-03 18:50:01,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898569331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:01,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:01,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:50:01,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656567349] [2024-06-03 18:50:01,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:01,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:50:01,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:01,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:50:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:50:02,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:50:02,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 892 transitions, 22683 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:02,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:02,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:50:02,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:03,860 INFO L124 PetriNetUnfolderBase]: 3274/5502 cut-off events. [2024-06-03 18:50:03,860 INFO L125 PetriNetUnfolderBase]: For 677499/677499 co-relation queries the response was YES. [2024-06-03 18:50:03,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52723 conditions, 5502 events. 3274/5502 cut-off events. For 677499/677499 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 36556 event pairs, 602 based on Foata normal form. 1/5481 useless extension candidates. Maximal degree in co-relation 52467. Up to 3897 conditions per place. [2024-06-03 18:50:03,940 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 394 selfloop transitions, 531 changer transitions 0/931 dead transitions. [2024-06-03 18:50:03,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 931 transitions, 25328 flow [2024-06-03 18:50:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 18:50:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 18:50:03,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 298 transitions. [2024-06-03 18:50:03,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845528455284553 [2024-06-03 18:50:03,942 INFO L175 Difference]: Start difference. First operand has 575 places, 892 transitions, 22683 flow. Second operand 15 states and 298 transitions. [2024-06-03 18:50:03,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 931 transitions, 25328 flow [2024-06-03 18:50:08,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 931 transitions, 23634 flow, removed 4 selfloop flow, removed 20 redundant places. [2024-06-03 18:50:08,359 INFO L231 Difference]: Finished difference. Result has 570 places, 892 transitions, 22057 flow [2024-06-03 18:50:08,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=20989, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22057, PETRI_PLACES=570, PETRI_TRANSITIONS=892} [2024-06-03 18:50:08,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 528 predicate places. [2024-06-03 18:50:08,360 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 892 transitions, 22057 flow [2024-06-03 18:50:08,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:08,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:08,360 INFO 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] [2024-06-03 18:50:08,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 18:50:08,361 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)] === [2024-06-03 18:50:08,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:08,361 INFO L85 PathProgramCache]: Analyzing trace with hash -805930622, now seen corresponding path program 2 times [2024-06-03 18:50:08,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:08,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19489603] [2024-06-03 18:50:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:08,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:08,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:08,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19489603] [2024-06-03 18:50:08,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19489603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:08,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:08,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:50:08,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648863737] [2024-06-03 18:50:08,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:08,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:50:08,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:08,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:50:08,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:50:08,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:50:08,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 892 transitions, 22057 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:08,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:08,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:50:08,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:10,545 INFO L124 PetriNetUnfolderBase]: 3310/5569 cut-off events. [2024-06-03 18:50:10,545 INFO L125 PetriNetUnfolderBase]: For 734304/734304 co-relation queries the response was YES. [2024-06-03 18:50:10,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53118 conditions, 5569 events. 3310/5569 cut-off events. For 734304/734304 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 36990 event pairs, 586 based on Foata normal form. 10/5576 useless extension candidates. Maximal degree in co-relation 52862. Up to 4796 conditions per place. [2024-06-03 18:50:10,626 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 804 selfloop transitions, 105 changer transitions 0/915 dead transitions. [2024-06-03 18:50:10,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 915 transitions, 24023 flow [2024-06-03 18:50:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:50:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:50:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-03 18:50:10,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49889135254988914 [2024-06-03 18:50:10,627 INFO L175 Difference]: Start difference. First operand has 570 places, 892 transitions, 22057 flow. Second operand 11 states and 225 transitions. [2024-06-03 18:50:10,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 915 transitions, 24023 flow [2024-06-03 18:50:15,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 915 transitions, 22989 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-03 18:50:15,070 INFO L231 Difference]: Finished difference. Result has 568 places, 894 transitions, 21309 flow [2024-06-03 18:50:15,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21023, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21309, PETRI_PLACES=568, PETRI_TRANSITIONS=894} [2024-06-03 18:50:15,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 526 predicate places. [2024-06-03 18:50:15,071 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 894 transitions, 21309 flow [2024-06-03 18:50:15,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:15,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:15,071 INFO 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] [2024-06-03 18:50:15,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 18:50:15,072 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)] === [2024-06-03 18:50:15,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:15,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1801837924, now seen corresponding path program 3 times [2024-06-03 18:50:15,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:15,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722697427] [2024-06-03 18:50:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:15,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:15,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:15,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722697427] [2024-06-03 18:50:15,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722697427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:15,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:15,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:50:15,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065016510] [2024-06-03 18:50:15,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:15,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:50:15,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:15,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:50:15,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:50:15,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:50:15,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 894 transitions, 21309 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:15,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:15,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:50:15,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:17,297 INFO L124 PetriNetUnfolderBase]: 3598/6029 cut-off events. [2024-06-03 18:50:17,297 INFO L125 PetriNetUnfolderBase]: For 1045586/1045586 co-relation queries the response was YES. [2024-06-03 18:50:17,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60680 conditions, 6029 events. 3598/6029 cut-off events. For 1045586/1045586 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 40263 event pairs, 680 based on Foata normal form. 10/6036 useless extension candidates. Maximal degree in co-relation 60423. Up to 4632 conditions per place. [2024-06-03 18:50:17,392 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 810 selfloop transitions, 111 changer transitions 0/927 dead transitions. [2024-06-03 18:50:17,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 927 transitions, 23681 flow [2024-06-03 18:50:17,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:50:17,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:50:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-03 18:50:17,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 18:50:17,393 INFO L175 Difference]: Start difference. First operand has 568 places, 894 transitions, 21309 flow. Second operand 11 states and 231 transitions. [2024-06-03 18:50:17,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 927 transitions, 23681 flow [2024-06-03 18:50:23,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 927 transitions, 23456 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 18:50:23,909 INFO L231 Difference]: Finished difference. Result has 573 places, 898 transitions, 21475 flow [2024-06-03 18:50:23,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21090, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21475, PETRI_PLACES=573, PETRI_TRANSITIONS=898} [2024-06-03 18:50:23,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 531 predicate places. [2024-06-03 18:50:23,910 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 898 transitions, 21475 flow [2024-06-03 18:50:23,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:23,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:23,910 INFO 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] [2024-06-03 18:50:23,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 18:50:23,911 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)] === [2024-06-03 18:50:23,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:23,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1220203622, now seen corresponding path program 4 times [2024-06-03 18:50:23,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:23,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736950395] [2024-06-03 18:50:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:23,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:24,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:24,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736950395] [2024-06-03 18:50:24,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736950395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:24,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:24,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:50:24,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366391228] [2024-06-03 18:50:24,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:24,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:50:24,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:24,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:50:24,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:50:24,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:50:24,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 898 transitions, 21475 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:24,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:24,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:50:24,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:26,123 INFO L124 PetriNetUnfolderBase]: 3575/5994 cut-off events. [2024-06-03 18:50:26,124 INFO L125 PetriNetUnfolderBase]: For 983017/983017 co-relation queries the response was YES. [2024-06-03 18:50:26,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59151 conditions, 5994 events. 3575/5994 cut-off events. For 983017/983017 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 40082 event pairs, 703 based on Foata normal form. 10/6001 useless extension candidates. Maximal degree in co-relation 58892. Up to 5219 conditions per place. [2024-06-03 18:50:26,215 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 807 selfloop transitions, 108 changer transitions 0/921 dead transitions. [2024-06-03 18:50:26,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 921 transitions, 23460 flow [2024-06-03 18:50:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:50:26,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:50:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-03 18:50:26,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49889135254988914 [2024-06-03 18:50:26,216 INFO L175 Difference]: Start difference. First operand has 573 places, 898 transitions, 21475 flow. Second operand 11 states and 225 transitions. [2024-06-03 18:50:26,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 921 transitions, 23460 flow [2024-06-03 18:50:31,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 921 transitions, 23272 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-03 18:50:31,811 INFO L231 Difference]: Finished difference. Result has 577 places, 900 transitions, 21584 flow [2024-06-03 18:50:31,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21295, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21584, PETRI_PLACES=577, PETRI_TRANSITIONS=900} [2024-06-03 18:50:31,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 535 predicate places. [2024-06-03 18:50:31,811 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 900 transitions, 21584 flow [2024-06-03 18:50:31,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:31,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:31,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:31,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 18:50:31,812 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)] === [2024-06-03 18:50:31,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:31,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1220190881, now seen corresponding path program 16 times [2024-06-03 18:50:31,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:31,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507780529] [2024-06-03 18:50:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:31,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:31,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:31,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507780529] [2024-06-03 18:50:31,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507780529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:31,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:31,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:50:31,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60734911] [2024-06-03 18:50:31,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:31,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:50:31,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:31,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:50:31,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:50:32,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:50:32,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 900 transitions, 21584 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:32,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:32,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:50:32,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:34,126 INFO L124 PetriNetUnfolderBase]: 3580/6003 cut-off events. [2024-06-03 18:50:34,126 INFO L125 PetriNetUnfolderBase]: For 916920/916920 co-relation queries the response was YES. [2024-06-03 18:50:34,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59012 conditions, 6003 events. 3580/6003 cut-off events. For 916920/916920 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 40161 event pairs, 703 based on Foata normal form. 1/6001 useless extension candidates. Maximal degree in co-relation 58751. Up to 5233 conditions per place. [2024-06-03 18:50:34,213 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 792 selfloop transitions, 124 changer transitions 0/922 dead transitions. [2024-06-03 18:50:34,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 922 transitions, 23779 flow [2024-06-03 18:50:34,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:50:34,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:50:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 238 transitions. [2024-06-03 18:50:34,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483739837398374 [2024-06-03 18:50:34,214 INFO L175 Difference]: Start difference. First operand has 577 places, 900 transitions, 21584 flow. Second operand 12 states and 238 transitions. [2024-06-03 18:50:34,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 922 transitions, 23779 flow [2024-06-03 18:50:40,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 922 transitions, 23527 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-03 18:50:40,791 INFO L231 Difference]: Finished difference. Result has 580 places, 903 transitions, 21665 flow [2024-06-03 18:50:40,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21334, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21665, PETRI_PLACES=580, PETRI_TRANSITIONS=903} [2024-06-03 18:50:40,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 538 predicate places. [2024-06-03 18:50:40,792 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 903 transitions, 21665 flow [2024-06-03 18:50:40,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:40,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:40,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:40,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 18:50:40,792 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)] === [2024-06-03 18:50:40,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:40,792 INFO L85 PathProgramCache]: Analyzing trace with hash 768592965, now seen corresponding path program 17 times [2024-06-03 18:50:40,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:40,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412935541] [2024-06-03 18:50:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:40,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:40,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:40,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412935541] [2024-06-03 18:50:40,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412935541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:40,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:40,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:50:40,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443987450] [2024-06-03 18:50:40,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:40,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:50:40,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:50:40,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:50:41,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:50:41,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 903 transitions, 21665 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:41,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:41,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:50:41,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:43,050 INFO L124 PetriNetUnfolderBase]: 3593/6025 cut-off events. [2024-06-03 18:50:43,050 INFO L125 PetriNetUnfolderBase]: For 920596/920596 co-relation queries the response was YES. [2024-06-03 18:50:43,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58961 conditions, 6025 events. 3593/6025 cut-off events. For 920596/920596 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 40389 event pairs, 703 based on Foata normal form. 1/6023 useless extension candidates. Maximal degree in co-relation 58699. Up to 5248 conditions per place. [2024-06-03 18:50:43,142 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 796 selfloop transitions, 130 changer transitions 0/932 dead transitions. [2024-06-03 18:50:43,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 932 transitions, 24445 flow [2024-06-03 18:50:43,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 18:50:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 18:50:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 272 transitions. [2024-06-03 18:50:43,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-03 18:50:43,143 INFO L175 Difference]: Start difference. First operand has 580 places, 903 transitions, 21665 flow. Second operand 14 states and 272 transitions. [2024-06-03 18:50:43,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 932 transitions, 24445 flow [2024-06-03 18:50:50,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 932 transitions, 24177 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-03 18:50:50,185 INFO L231 Difference]: Finished difference. Result has 584 places, 909 transitions, 21829 flow [2024-06-03 18:50:50,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21409, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21829, PETRI_PLACES=584, PETRI_TRANSITIONS=909} [2024-06-03 18:50:50,185 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 542 predicate places. [2024-06-03 18:50:50,185 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 909 transitions, 21829 flow [2024-06-03 18:50:50,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:50,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:50,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:50,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 18:50:50,186 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)] === [2024-06-03 18:50:50,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash 996840075, now seen corresponding path program 18 times [2024-06-03 18:50:50,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:50,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266517964] [2024-06-03 18:50:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:50,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:50,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:50,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266517964] [2024-06-03 18:50:50,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266517964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:50,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:50,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:50:50,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820853019] [2024-06-03 18:50:50,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:50,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:50:50,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:50,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:50:50,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:50:50,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:50:50,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 909 transitions, 21829 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:50,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:50,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:50:50,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:52,471 INFO L124 PetriNetUnfolderBase]: 3590/6029 cut-off events. [2024-06-03 18:50:52,471 INFO L125 PetriNetUnfolderBase]: For 926801/926801 co-relation queries the response was YES. [2024-06-03 18:50:52,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58932 conditions, 6029 events. 3590/6029 cut-off events. For 926801/926801 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 40532 event pairs, 707 based on Foata normal form. 1/6027 useless extension candidates. Maximal degree in co-relation 58669. Up to 5245 conditions per place. [2024-06-03 18:50:52,562 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 796 selfloop transitions, 126 changer transitions 0/928 dead transitions. [2024-06-03 18:50:52,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 928 transitions, 23961 flow [2024-06-03 18:50:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:50:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:50:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 238 transitions. [2024-06-03 18:50:52,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483739837398374 [2024-06-03 18:50:52,563 INFO L175 Difference]: Start difference. First operand has 584 places, 909 transitions, 21829 flow. Second operand 12 states and 238 transitions. [2024-06-03 18:50:52,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 928 transitions, 23961 flow [2024-06-03 18:50:58,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 928 transitions, 23744 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-03 18:50:58,510 INFO L231 Difference]: Finished difference. Result has 587 places, 909 transitions, 21870 flow [2024-06-03 18:50:58,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21612, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21870, PETRI_PLACES=587, PETRI_TRANSITIONS=909} [2024-06-03 18:50:58,510 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 545 predicate places. [2024-06-03 18:50:58,510 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 909 transitions, 21870 flow [2024-06-03 18:50:58,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:58,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:58,510 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] [2024-06-03 18:50:58,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 18:50:58,510 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)] === [2024-06-03 18:50:58,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:58,511 INFO L85 PathProgramCache]: Analyzing trace with hash 996845655, now seen corresponding path program 19 times [2024-06-03 18:50:58,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:58,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939252410] [2024-06-03 18:50:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:58,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:58,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:58,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939252410] [2024-06-03 18:50:58,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939252410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:58,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:58,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:50:58,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617760611] [2024-06-03 18:50:58,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:58,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:50:58,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:58,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:50:58,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:50:58,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:50:58,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 909 transitions, 21870 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:58,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:58,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:50:58,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:00,607 INFO L124 PetriNetUnfolderBase]: 3595/6030 cut-off events. [2024-06-03 18:51:00,607 INFO L125 PetriNetUnfolderBase]: For 942165/942165 co-relation queries the response was YES. [2024-06-03 18:51:00,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59117 conditions, 6030 events. 3595/6030 cut-off events. For 942165/942165 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 40435 event pairs, 703 based on Foata normal form. 1/6028 useless extension candidates. Maximal degree in co-relation 58853. Up to 5251 conditions per place. [2024-06-03 18:51:00,700 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 790 selfloop transitions, 134 changer transitions 0/930 dead transitions. [2024-06-03 18:51:00,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 930 transitions, 24092 flow [2024-06-03 18:51:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:51:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:51:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-03 18:51:00,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49223946784922396 [2024-06-03 18:51:00,705 INFO L175 Difference]: Start difference. First operand has 587 places, 909 transitions, 21870 flow. Second operand 11 states and 222 transitions. [2024-06-03 18:51:00,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 930 transitions, 24092 flow [2024-06-03 18:51:06,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 930 transitions, 23798 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-03 18:51:06,478 INFO L231 Difference]: Finished difference. Result has 587 places, 912 transitions, 21936 flow [2024-06-03 18:51:06,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21582, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21936, PETRI_PLACES=587, PETRI_TRANSITIONS=912} [2024-06-03 18:51:06,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 545 predicate places. [2024-06-03 18:51:06,478 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 912 transitions, 21936 flow [2024-06-03 18:51:06,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:06,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:06,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:06,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 18:51:06,479 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)] === [2024-06-03 18:51:06,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:06,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1220012321, now seen corresponding path program 20 times [2024-06-03 18:51:06,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:06,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355068553] [2024-06-03 18:51:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:06,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:06,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:06,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355068553] [2024-06-03 18:51:06,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355068553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:06,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:06,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:51:06,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149869674] [2024-06-03 18:51:06,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:06,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:51:06,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:06,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:51:06,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:51:06,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:51:06,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 912 transitions, 21936 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:06,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:06,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:51:06,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:08,790 INFO L124 PetriNetUnfolderBase]: 3600/6055 cut-off events. [2024-06-03 18:51:08,790 INFO L125 PetriNetUnfolderBase]: For 956938/956938 co-relation queries the response was YES. [2024-06-03 18:51:08,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59312 conditions, 6055 events. 3600/6055 cut-off events. For 956938/956938 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 40747 event pairs, 715 based on Foata normal form. 1/6053 useless extension candidates. Maximal degree in co-relation 59047. Up to 5257 conditions per place. [2024-06-03 18:51:08,879 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 793 selfloop transitions, 135 changer transitions 0/934 dead transitions. [2024-06-03 18:51:08,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 934 transitions, 24410 flow [2024-06-03 18:51:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:51:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:51:08,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-03 18:51:08,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49223946784922396 [2024-06-03 18:51:08,880 INFO L175 Difference]: Start difference. First operand has 587 places, 912 transitions, 21936 flow. Second operand 11 states and 222 transitions. [2024-06-03 18:51:08,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 934 transitions, 24410 flow [2024-06-03 18:51:14,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 934 transitions, 24189 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 18:51:14,781 INFO L231 Difference]: Finished difference. Result has 590 places, 915 transitions, 22077 flow [2024-06-03 18:51:14,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21718, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=912, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=22077, PETRI_PLACES=590, PETRI_TRANSITIONS=915} [2024-06-03 18:51:14,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 548 predicate places. [2024-06-03 18:51:14,782 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 915 transitions, 22077 flow [2024-06-03 18:51:14,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:14,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:14,782 INFO 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] [2024-06-03 18:51:14,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 18:51:14,783 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)] === [2024-06-03 18:51:14,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:14,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1220023481, now seen corresponding path program 21 times [2024-06-03 18:51:14,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:14,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524054865] [2024-06-03 18:51:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:14,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:14,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:14,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524054865] [2024-06-03 18:51:14,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524054865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:14,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:14,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:51:14,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553088608] [2024-06-03 18:51:14,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:14,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:51:14,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:14,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:51:14,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:51:14,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:51:14,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 915 transitions, 22077 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:14,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:14,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:51:14,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:16,977 INFO L124 PetriNetUnfolderBase]: 3597/6039 cut-off events. [2024-06-03 18:51:16,977 INFO L125 PetriNetUnfolderBase]: For 963640/963640 co-relation queries the response was YES. [2024-06-03 18:51:17,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59283 conditions, 6039 events. 3597/6039 cut-off events. For 963640/963640 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 40535 event pairs, 705 based on Foata normal form. 1/6037 useless extension candidates. Maximal degree in co-relation 59017. Up to 5254 conditions per place. [2024-06-03 18:51:17,070 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 790 selfloop transitions, 137 changer transitions 0/933 dead transitions. [2024-06-03 18:51:17,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 933 transitions, 24223 flow [2024-06-03 18:51:17,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:51:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:51:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-03 18:51:17,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49223946784922396 [2024-06-03 18:51:17,071 INFO L175 Difference]: Start difference. First operand has 590 places, 915 transitions, 22077 flow. Second operand 11 states and 222 transitions. [2024-06-03 18:51:17,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 933 transitions, 24223 flow [2024-06-03 18:51:24,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 933 transitions, 23908 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-03 18:51:24,459 INFO L231 Difference]: Finished difference. Result has 592 places, 915 transitions, 22042 flow [2024-06-03 18:51:24,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21762, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=22042, PETRI_PLACES=592, PETRI_TRANSITIONS=915} [2024-06-03 18:51:24,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 550 predicate places. [2024-06-03 18:51:24,461 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 915 transitions, 22042 flow [2024-06-03 18:51:24,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:24,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:24,461 INFO 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] [2024-06-03 18:51:24,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 18:51:24,461 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)] === [2024-06-03 18:51:24,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:24,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1219839341, now seen corresponding path program 22 times [2024-06-03 18:51:24,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:24,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575750776] [2024-06-03 18:51:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:24,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:24,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:24,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575750776] [2024-06-03 18:51:24,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575750776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:24,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:24,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:51:24,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838140479] [2024-06-03 18:51:24,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:24,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:51:24,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:24,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:51:24,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:51:24,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-03 18:51:24,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 915 transitions, 22042 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:24,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:24,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-03 18:51:24,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:26,834 INFO L124 PetriNetUnfolderBase]: 3594/6031 cut-off events. [2024-06-03 18:51:26,834 INFO L125 PetriNetUnfolderBase]: For 967975/967975 co-relation queries the response was YES. [2024-06-03 18:51:26,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59220 conditions, 6031 events. 3594/6031 cut-off events. For 967975/967975 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 40445 event pairs, 703 based on Foata normal form. 1/6029 useless extension candidates. Maximal degree in co-relation 58953. Up to 5251 conditions per place. [2024-06-03 18:51:26,925 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 792 selfloop transitions, 135 changer transitions 0/933 dead transitions. [2024-06-03 18:51:26,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 933 transitions, 23946 flow [2024-06-03 18:51:26,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:51:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:51:26,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 237 transitions. [2024-06-03 18:51:26,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-03 18:51:26,926 INFO L175 Difference]: Start difference. First operand has 592 places, 915 transitions, 22042 flow. Second operand 12 states and 237 transitions. [2024-06-03 18:51:26,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 933 transitions, 23946 flow [2024-06-03 18:51:33,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 933 transitions, 23603 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-03 18:51:33,469 INFO L231 Difference]: Finished difference. Result has 594 places, 915 transitions, 21975 flow [2024-06-03 18:51:33,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21699, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21975, PETRI_PLACES=594, PETRI_TRANSITIONS=915} [2024-06-03 18:51:33,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 552 predicate places. [2024-06-03 18:51:33,470 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 915 transitions, 21975 flow [2024-06-03 18:51:33,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:33,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:33,470 INFO 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] [2024-06-03 18:51:33,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 18:51:33,470 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)] === [2024-06-03 18:51:33,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:33,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1617502539, now seen corresponding path program 23 times [2024-06-03 18:51:33,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:33,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141239454] [2024-06-03 18:51:33,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:33,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:33,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:33,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141239454] [2024-06-03 18:51:33,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141239454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:33,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:33,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:33,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600642172] [2024-06-03 18:51:33,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:33,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:33,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:33,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:33,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:33,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:51:33,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 915 transitions, 21975 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:33,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:33,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:51:33,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:35,576 INFO L124 PetriNetUnfolderBase]: 3596/6034 cut-off events. [2024-06-03 18:51:35,576 INFO L125 PetriNetUnfolderBase]: For 982372/982372 co-relation queries the response was YES. [2024-06-03 18:51:35,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59210 conditions, 6034 events. 3596/6034 cut-off events. For 982372/982372 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 40527 event pairs, 700 based on Foata normal form. 2/6030 useless extension candidates. Maximal degree in co-relation 58942. Up to 4996 conditions per place. [2024-06-03 18:51:35,667 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 647 selfloop transitions, 289 changer transitions 0/942 dead transitions. [2024-06-03 18:51:35,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 942 transitions, 24408 flow [2024-06-03 18:51:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:51:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:51:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-03 18:51:35,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-03 18:51:35,668 INFO L175 Difference]: Start difference. First operand has 594 places, 915 transitions, 21975 flow. Second operand 8 states and 183 transitions. [2024-06-03 18:51:35,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 942 transitions, 24408 flow [2024-06-03 18:51:42,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 942 transitions, 24130 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-03 18:51:42,869 INFO L231 Difference]: Finished difference. Result has 592 places, 920 transitions, 22471 flow [2024-06-03 18:51:42,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21697, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=22471, PETRI_PLACES=592, PETRI_TRANSITIONS=920} [2024-06-03 18:51:42,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 550 predicate places. [2024-06-03 18:51:42,870 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 920 transitions, 22471 flow [2024-06-03 18:51:42,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:42,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:42,870 INFO 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] [2024-06-03 18:51:42,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 18:51:42,870 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)] === [2024-06-03 18:51:42,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:42,871 INFO L85 PathProgramCache]: Analyzing trace with hash -679705429, now seen corresponding path program 24 times [2024-06-03 18:51:42,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:42,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737566550] [2024-06-03 18:51:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:42,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:43,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:43,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737566550] [2024-06-03 18:51:43,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737566550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:43,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:43,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:51:43,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455166592] [2024-06-03 18:51:43,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:43,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:51:43,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:43,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:51:43,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:51:43,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:51:43,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 920 transitions, 22471 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:43,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:43,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:51:43,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:45,196 INFO L124 PetriNetUnfolderBase]: 3606/6048 cut-off events. [2024-06-03 18:51:45,196 INFO L125 PetriNetUnfolderBase]: For 1000462/1000462 co-relation queries the response was YES. [2024-06-03 18:51:45,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59945 conditions, 6048 events. 3606/6048 cut-off events. For 1000462/1000462 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 40554 event pairs, 698 based on Foata normal form. 2/6044 useless extension candidates. Maximal degree in co-relation 59676. Up to 5008 conditions per place. [2024-06-03 18:51:45,287 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 648 selfloop transitions, 295 changer transitions 0/949 dead transitions. [2024-06-03 18:51:45,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 949 transitions, 24950 flow [2024-06-03 18:51:45,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:51:45,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:51:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-03 18:51:45,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-03 18:51:45,288 INFO L175 Difference]: Start difference. First operand has 592 places, 920 transitions, 22471 flow. Second operand 9 states and 204 transitions. [2024-06-03 18:51:45,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 949 transitions, 24950 flow [2024-06-03 18:51:52,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 949 transitions, 24313 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 18:51:52,468 INFO L231 Difference]: Finished difference. Result has 595 places, 928 transitions, 22748 flow [2024-06-03 18:51:52,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21848, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22748, PETRI_PLACES=595, PETRI_TRANSITIONS=928} [2024-06-03 18:51:52,469 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 553 predicate places. [2024-06-03 18:51:52,469 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 928 transitions, 22748 flow [2024-06-03 18:51:52,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:52,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:52,469 INFO 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] [2024-06-03 18:51:52,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 18:51:52,469 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)] === [2024-06-03 18:51:52,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:52,469 INFO L85 PathProgramCache]: Analyzing trace with hash -679699849, now seen corresponding path program 25 times [2024-06-03 18:51:52,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:52,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54372754] [2024-06-03 18:51:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:52,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:52,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:52,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54372754] [2024-06-03 18:51:52,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54372754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:52,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:52,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:51:52,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069069965] [2024-06-03 18:51:52,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:52,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:51:52,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:52,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:51:52,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:51:52,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:51:52,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 928 transitions, 22748 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:52,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:52,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:51:52,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:54,681 INFO L124 PetriNetUnfolderBase]: 3600/6040 cut-off events. [2024-06-03 18:51:54,681 INFO L125 PetriNetUnfolderBase]: For 984104/984104 co-relation queries the response was YES. [2024-06-03 18:51:54,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59716 conditions, 6040 events. 3600/6040 cut-off events. For 984104/984104 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 40521 event pairs, 698 based on Foata normal form. 2/6036 useless extension candidates. Maximal degree in co-relation 59446. Up to 5002 conditions per place. [2024-06-03 18:51:54,771 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 642 selfloop transitions, 302 changer transitions 0/950 dead transitions. [2024-06-03 18:51:54,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 950 transitions, 24751 flow [2024-06-03 18:51:54,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:51:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:51:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-03 18:51:54,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-03 18:51:54,772 INFO L175 Difference]: Start difference. First operand has 595 places, 928 transitions, 22748 flow. Second operand 11 states and 239 transitions. [2024-06-03 18:51:54,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 950 transitions, 24751 flow [2024-06-03 18:52:02,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 950 transitions, 24016 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-03 18:52:02,600 INFO L231 Difference]: Finished difference. Result has 598 places, 928 transitions, 22647 flow [2024-06-03 18:52:02,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=22013, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=928, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=22647, PETRI_PLACES=598, PETRI_TRANSITIONS=928} [2024-06-03 18:52:02,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 556 predicate places. [2024-06-03 18:52:02,600 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 928 transitions, 22647 flow [2024-06-03 18:52:02,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:02,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:02,601 INFO 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] [2024-06-03 18:52:02,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 18:52:02,601 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)] === [2024-06-03 18:52:02,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:02,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1979101687, now seen corresponding path program 26 times [2024-06-03 18:52:02,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:02,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441497869] [2024-06-03 18:52:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:02,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:02,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:02,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441497869] [2024-06-03 18:52:02,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441497869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:02,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:02,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:52:02,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613235401] [2024-06-03 18:52:02,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:02,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:52:02,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:02,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:52:02,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:52:02,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:52:02,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 928 transitions, 22647 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:02,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:02,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:52:02,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:04,667 INFO L124 PetriNetUnfolderBase]: 3642/6134 cut-off events. [2024-06-03 18:52:04,667 INFO L125 PetriNetUnfolderBase]: For 1023822/1023831 co-relation queries the response was YES. [2024-06-03 18:52:04,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60795 conditions, 6134 events. 3642/6134 cut-off events. For 1023822/1023831 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 41511 event pairs, 737 based on Foata normal form. 8/6127 useless extension candidates. Maximal degree in co-relation 60525. Up to 4453 conditions per place. [2024-06-03 18:52:04,762 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 325 selfloop transitions, 641 changer transitions 0/972 dead transitions. [2024-06-03 18:52:04,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 972 transitions, 25696 flow [2024-06-03 18:52:04,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:52:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:52:04,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-03 18:52:04,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-03 18:52:04,763 INFO L175 Difference]: Start difference. First operand has 598 places, 928 transitions, 22647 flow. Second operand 10 states and 214 transitions. [2024-06-03 18:52:04,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 972 transitions, 25696 flow [2024-06-03 18:52:12,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 972 transitions, 25039 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-03 18:52:12,672 INFO L231 Difference]: Finished difference. Result has 597 places, 946 transitions, 23738 flow [2024-06-03 18:52:12,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=21994, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=928, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23738, PETRI_PLACES=597, PETRI_TRANSITIONS=946} [2024-06-03 18:52:12,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 555 predicate places. [2024-06-03 18:52:12,672 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 946 transitions, 23738 flow [2024-06-03 18:52:12,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:12,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:12,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:52:12,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-03 18:52:12,673 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)] === [2024-06-03 18:52:12,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:12,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1521419149, now seen corresponding path program 27 times [2024-06-03 18:52:12,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:12,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709178288] [2024-06-03 18:52:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:12,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat