./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 11:19:02,775 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:19:02,814 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:19:02,817 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:19:02,818 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:19:02,861 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:19:02,861 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:19:02,873 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:19:02,874 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:19:02,877 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:19:02,877 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:19:02,877 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:19:02,878 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:19:02,879 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:19:02,879 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:19:02,879 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:19:02,879 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:19:02,880 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:19:02,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:19:02,880 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:19:02,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:19:02,881 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:19:02,881 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:19:02,882 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:19:02,882 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:19:02,882 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:19:02,882 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:19:02,882 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:19:02,883 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:19:02,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:19:02,884 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:19:02,884 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:19:02,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:19:02,884 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:19:02,884 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:19:02,885 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:19:02,885 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:19:02,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:19:02,885 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:19:02,885 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:19:02,885 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:19:02,886 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:19:02,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:19:02,886 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:19:03,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:19:03,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:19:03,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:19:03,093 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:19:03,093 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:19:03,094 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 11:19:03,234 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:19:03,235 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:19:03,235 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:19:04,201 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:19:04,501 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:19:04,501 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:19:04,513 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11c903465/8d063b291a344ebf878665d596970726/FLAG82db49345 [2024-06-14 11:19:04,526 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11c903465/8d063b291a344ebf878665d596970726 [2024-06-14 11:19:04,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:19:04,528 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:19:04,530 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:19:04,530 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:19:04,533 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:19:04,534 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:19:03" (1/2) ... [2024-06-14 11:19:04,535 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f2208b0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:04, skipping insertion in model container [2024-06-14 11:19:04,535 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:19:03" (1/2) ... [2024-06-14 11:19:04,536 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4826fd43 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:19:04, skipping insertion in model container [2024-06-14 11:19:04,537 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:19:04" (2/2) ... [2024-06-14 11:19:04,537 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f2208b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:04, skipping insertion in model container [2024-06-14 11:19:04,538 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:19:04" (2/2) ... [2024-06-14 11:19:04,538 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:19:04,579 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:19:04,580 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 11:19:04,580 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 11:19:04,580 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 11:19:04,580 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:19:04,580 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-14 11:19:04,616 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:19:04,846 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:19:04,860 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:19:04,978 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:19:05,018 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:19:05,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:05 WrapperNode [2024-06-14 11:19:05,020 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:19:05,021 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:19:05,022 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:19:05,022 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:19:05,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:05" (1/1) ... [2024-06-14 11:19:05,051 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:05" (1/1) ... [2024-06-14 11:19:05,071 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-14 11:19:05,072 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:19:05,072 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:19:05,072 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:19:05,072 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:19:05,080 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:05" (1/1) ... [2024-06-14 11:19:05,080 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:05" (1/1) ... [2024-06-14 11:19:05,084 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:05" (1/1) ... [2024-06-14 11:19:05,099 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]. [2024-06-14 11:19:05,100 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:05" (1/1) ... [2024-06-14 11:19:05,100 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:05" (1/1) ... [2024-06-14 11:19:05,103 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:05" (1/1) ... [2024-06-14 11:19:05,105 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:05" (1/1) ... [2024-06-14 11:19:05,106 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:05" (1/1) ... [2024-06-14 11:19:05,106 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:05" (1/1) ... [2024-06-14 11:19:05,108 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:19:05,109 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:19:05,109 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:19:05,109 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:19:05,110 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:05" (1/1) ... [2024-06-14 11:19:05,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:19:05,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:19:05,136 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) [2024-06-14 11:19:05,158 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 [2024-06-14 11:19:05,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:19:05,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:19:05,172 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:19:05,173 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:19:05,173 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:19:05,173 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:19:05,173 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:19:05,173 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:19:05,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:19:05,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:19:05,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:19:05,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:19:05,175 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:19:05,259 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:19:05,261 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:19:05,422 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:19:05,422 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:19:05,511 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:19:05,511 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:19:05,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:19:05 BoogieIcfgContainer [2024-06-14 11:19:05,512 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:19:05,514 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:19:05,514 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:19:05,518 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:19:05,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:19:03" (1/4) ... [2024-06-14 11:19:05,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5057160f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:19:05, skipping insertion in model container [2024-06-14 11:19:05,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:19:04" (2/4) ... [2024-06-14 11:19:05,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5057160f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:19:05, skipping insertion in model container [2024-06-14 11:19:05,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:19:05" (3/4) ... [2024-06-14 11:19:05,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5057160f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:19:05, skipping insertion in model container [2024-06-14 11:19:05,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:19:05" (4/4) ... [2024-06-14 11:19:05,521 INFO L112 eAbstractionObserver]: Analyzing ICFG safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:19:05,533 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:19:05,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:19:05,534 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:19:05,578 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:19:05,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 11:19:05,656 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 11:19:05,657 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:19:05,658 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 61 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. [2024-06-14 11:19:05,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 11:19:05,660 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 11:19:05,668 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:19:05,673 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;@827931, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:19:05,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:19:05,676 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:19:05,676 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:19:05,676 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:19:05,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:05,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:19:05,677 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)] === [2024-06-14 11:19:05,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:05,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1786995326, now seen corresponding path program 1 times [2024-06-14 11:19:05,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:05,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156062130] [2024-06-14 11:19:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:05,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:05,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:06,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:06,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156062130] [2024-06-14 11:19:06,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156062130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:06,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:06,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:19:06,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50410259] [2024-06-14 11:19:06,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:06,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:19:06,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:06,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:19:06,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:19:06,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-14 11:19:06,156 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) [2024-06-14 11:19:06,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:06,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-14 11:19:06,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:06,355 INFO L124 PetriNetUnfolderBase]: 471/808 cut-off events. [2024-06-14 11:19:06,355 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-14 11:19:06,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 808 events. 471/808 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3897 event pairs, 288 based on Foata normal form. 1/788 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-14 11:19:06,367 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 29 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 11:19:06,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 165 flow [2024-06-14 11:19:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:19:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:19:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-14 11:19:06,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-14 11:19:06,378 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 84 transitions. [2024-06-14 11:19:06,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 165 flow [2024-06-14 11:19:06,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:06,383 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 11:19:06,385 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} [2024-06-14 11:19:06,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 11:19:06,388 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 11:19:06,388 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) [2024-06-14 11:19:06,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:06,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:06,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:19:06,389 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)] === [2024-06-14 11:19:06,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash -257083245, now seen corresponding path program 1 times [2024-06-14 11:19:06,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:06,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810194470] [2024-06-14 11:19:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:06,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:06,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:06,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810194470] [2024-06-14 11:19:06,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810194470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:06,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:06,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:19:06,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776298689] [2024-06-14 11:19:06,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:06,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:19:06,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:06,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:19:06,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:19:06,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:06,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:06,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:06,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:06,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:06,836 INFO L124 PetriNetUnfolderBase]: 754/1257 cut-off events. [2024-06-14 11:19:06,837 INFO L125 PetriNetUnfolderBase]: For 195/205 co-relation queries the response was YES. [2024-06-14 11:19:06,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2861 conditions, 1257 events. 754/1257 cut-off events. For 195/205 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6122 event pairs, 318 based on Foata normal form. 6/1260 useless extension candidates. Maximal degree in co-relation 2846. Up to 1124 conditions per place. [2024-06-14 11:19:06,843 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-14 11:19:06,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 256 flow [2024-06-14 11:19:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:19:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:19:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-14 11:19:06,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-14 11:19:06,847 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 105 transitions. [2024-06-14 11:19:06,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 256 flow [2024-06-14 11:19:06,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:19:06,851 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-14 11:19:06,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-14 11:19:06,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-14 11:19:06,852 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-14 11:19:06,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:06,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:06,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:06,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:19:06,855 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:06,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:06,857 INFO L85 PathProgramCache]: Analyzing trace with hash 995354032, now seen corresponding path program 1 times [2024-06-14 11:19:06,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:06,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279933855] [2024-06-14 11:19:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:06,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:07,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:07,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279933855] [2024-06-14 11:19:07,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279933855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:07,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:07,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:07,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915884503] [2024-06-14 11:19:07,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:07,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:07,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:07,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:07,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:07,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:07,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 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) [2024-06-14 11:19:07,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:07,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:07,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:07,310 INFO L124 PetriNetUnfolderBase]: 745/1242 cut-off events. [2024-06-14 11:19:07,310 INFO L125 PetriNetUnfolderBase]: For 591/633 co-relation queries the response was YES. [2024-06-14 11:19:07,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3175 conditions, 1242 events. 745/1242 cut-off events. For 591/633 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6050 event pairs, 218 based on Foata normal form. 19/1258 useless extension candidates. Maximal degree in co-relation 3157. Up to 1079 conditions per place. [2024-06-14 11:19:07,319 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2024-06-14 11:19:07,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 316 flow [2024-06-14 11:19:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:07,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-14 11:19:07,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 11:19:07,323 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 125 transitions. [2024-06-14 11:19:07,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 316 flow [2024-06-14 11:19:07,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 314 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 11:19:07,326 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 183 flow [2024-06-14 11:19:07,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-14 11:19:07,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-14 11:19:07,328 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 183 flow [2024-06-14 11:19:07,328 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) [2024-06-14 11:19:07,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:07,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:07,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:19:07,329 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)] === [2024-06-14 11:19:07,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:07,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1465943599, now seen corresponding path program 1 times [2024-06-14 11:19:07,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:07,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614114462] [2024-06-14 11:19:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:07,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:07,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:07,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614114462] [2024-06-14 11:19:07,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614114462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:07,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:07,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:19:07,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479736187] [2024-06-14 11:19:07,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:07,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:19:07,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:07,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:19:07,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:19:07,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:07,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:07,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:07,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:07,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:07,677 INFO L124 PetriNetUnfolderBase]: 697/1163 cut-off events. [2024-06-14 11:19:07,678 INFO L125 PetriNetUnfolderBase]: For 1029/1029 co-relation queries the response was YES. [2024-06-14 11:19:07,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3248 conditions, 1163 events. 697/1163 cut-off events. For 1029/1029 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5805 event pairs, 308 based on Foata normal form. 2/1164 useless extension candidates. Maximal degree in co-relation 3227. Up to 1047 conditions per place. [2024-06-14 11:19:07,685 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 46 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-14 11:19:07,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 356 flow [2024-06-14 11:19:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:19:07,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:19:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-14 11:19:07,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 11:19:07,687 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 183 flow. Second operand 4 states and 100 transitions. [2024-06-14 11:19:07,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 356 flow [2024-06-14 11:19:07,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 331 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:07,693 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 231 flow [2024-06-14 11:19:07,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-06-14 11:19:07,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-14 11:19:07,694 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 231 flow [2024-06-14 11:19:07,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:07,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:07,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:07,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:19:07,695 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)] === [2024-06-14 11:19:07,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash 609729492, now seen corresponding path program 1 times [2024-06-14 11:19:07,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:07,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117285553] [2024-06-14 11:19:07,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:07,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:07,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:07,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117285553] [2024-06-14 11:19:07,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117285553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:07,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:07,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:07,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714859739] [2024-06-14 11:19:07,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:07,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:07,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:07,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:07,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:07,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:07,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:07,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:07,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:07,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:08,057 INFO L124 PetriNetUnfolderBase]: 826/1388 cut-off events. [2024-06-14 11:19:08,058 INFO L125 PetriNetUnfolderBase]: For 1903/1945 co-relation queries the response was YES. [2024-06-14 11:19:08,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4182 conditions, 1388 events. 826/1388 cut-off events. For 1903/1945 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6978 event pairs, 293 based on Foata normal form. 16/1385 useless extension candidates. Maximal degree in co-relation 4159. Up to 1177 conditions per place. [2024-06-14 11:19:08,067 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-06-14 11:19:08,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 465 flow [2024-06-14 11:19:08,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 11:19:08,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-14 11:19:08,068 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 231 flow. Second operand 5 states and 128 transitions. [2024-06-14 11:19:08,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 465 flow [2024-06-14 11:19:08,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 463 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 11:19:08,075 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 311 flow [2024-06-14 11:19:08,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-14 11:19:08,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-14 11:19:08,077 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 311 flow [2024-06-14 11:19:08,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:08,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:08,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:08,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:19:08,078 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)] === [2024-06-14 11:19:08,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:08,079 INFO L85 PathProgramCache]: Analyzing trace with hash 631097172, now seen corresponding path program 2 times [2024-06-14 11:19:08,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:08,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546521028] [2024-06-14 11:19:08,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:08,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:08,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:08,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546521028] [2024-06-14 11:19:08,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546521028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:08,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:08,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:08,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53345639] [2024-06-14 11:19:08,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:08,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:08,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:08,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:08,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:08,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:08,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 311 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:08,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:08,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:08,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:08,440 INFO L124 PetriNetUnfolderBase]: 821/1381 cut-off events. [2024-06-14 11:19:08,441 INFO L125 PetriNetUnfolderBase]: For 3010/3058 co-relation queries the response was YES. [2024-06-14 11:19:08,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4573 conditions, 1381 events. 821/1381 cut-off events. For 3010/3058 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6942 event pairs, 293 based on Foata normal form. 18/1381 useless extension candidates. Maximal degree in co-relation 4547. Up to 1181 conditions per place. [2024-06-14 11:19:08,448 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 15 changer transitions 0/70 dead transitions. [2024-06-14 11:19:08,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 471 flow [2024-06-14 11:19:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:19:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:19:08,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-14 11:19:08,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-14 11:19:08,450 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 311 flow. Second operand 4 states and 105 transitions. [2024-06-14 11:19:08,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 471 flow [2024-06-14 11:19:08,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 446 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-14 11:19:08,455 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 330 flow [2024-06-14 11:19:08,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-14 11:19:08,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-14 11:19:08,458 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 330 flow [2024-06-14 11:19:08,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:08,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:08,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:08,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:19:08,459 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)] === [2024-06-14 11:19:08,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:08,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1033237428, now seen corresponding path program 1 times [2024-06-14 11:19:08,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:08,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852554332] [2024-06-14 11:19:08,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:08,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:08,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:08,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852554332] [2024-06-14 11:19:08,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852554332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:08,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:08,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:08,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351781672] [2024-06-14 11:19:08,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:08,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:08,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:08,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:08,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:08,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:08,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 330 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:08,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:08,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:08,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:08,797 INFO L124 PetriNetUnfolderBase]: 697/1171 cut-off events. [2024-06-14 11:19:08,798 INFO L125 PetriNetUnfolderBase]: For 3078/3080 co-relation queries the response was YES. [2024-06-14 11:19:08,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4055 conditions, 1171 events. 697/1171 cut-off events. For 3078/3080 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5863 event pairs, 278 based on Foata normal form. 6/1176 useless extension candidates. Maximal degree in co-relation 4027. Up to 1029 conditions per place. [2024-06-14 11:19:08,804 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 57 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-14 11:19:08,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 74 transitions, 519 flow [2024-06-14 11:19:08,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:08,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-14 11:19:08,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-14 11:19:08,806 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 330 flow. Second operand 5 states and 121 transitions. [2024-06-14 11:19:08,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 74 transitions, 519 flow [2024-06-14 11:19:08,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 489 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:08,811 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 341 flow [2024-06-14 11:19:08,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=341, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-14 11:19:08,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-14 11:19:08,812 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 341 flow [2024-06-14 11:19:08,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:08,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:08,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:08,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:19:08,812 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)] === [2024-06-14 11:19:08,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:08,813 INFO L85 PathProgramCache]: Analyzing trace with hash -508420352, now seen corresponding path program 1 times [2024-06-14 11:19:08,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:08,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401235240] [2024-06-14 11:19:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:08,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:08,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:08,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401235240] [2024-06-14 11:19:08,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401235240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:08,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:08,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:08,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911263722] [2024-06-14 11:19:08,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:08,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:08,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:08,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:08,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:09,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:09,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:09,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:09,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:09,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:09,160 INFO L124 PetriNetUnfolderBase]: 888/1472 cut-off events. [2024-06-14 11:19:09,160 INFO L125 PetriNetUnfolderBase]: For 4343/4347 co-relation queries the response was YES. [2024-06-14 11:19:09,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5178 conditions, 1472 events. 888/1472 cut-off events. For 4343/4347 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7234 event pairs, 323 based on Foata normal form. 6/1476 useless extension candidates. Maximal degree in co-relation 5149. Up to 1228 conditions per place. [2024-06-14 11:19:09,168 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 71 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-14 11:19:09,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 96 transitions, 695 flow [2024-06-14 11:19:09,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 11:19:09,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 11:19:09,170 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 341 flow. Second operand 6 states and 146 transitions. [2024-06-14 11:19:09,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 96 transitions, 695 flow [2024-06-14 11:19:09,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 96 transitions, 672 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:09,176 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 467 flow [2024-06-14 11:19:09,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-14 11:19:09,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-14 11:19:09,178 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 467 flow [2024-06-14 11:19:09,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:09,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:09,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:09,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:19:09,178 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)] === [2024-06-14 11:19:09,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:09,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1910817844, now seen corresponding path program 2 times [2024-06-14 11:19:09,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:09,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495790155] [2024-06-14 11:19:09,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:09,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:09,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:09,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495790155] [2024-06-14 11:19:09,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495790155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:09,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:09,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:09,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381173042] [2024-06-14 11:19:09,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:09,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:09,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:09,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:09,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:09,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 467 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:09,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:09,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:09,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:09,556 INFO L124 PetriNetUnfolderBase]: 899/1495 cut-off events. [2024-06-14 11:19:09,556 INFO L125 PetriNetUnfolderBase]: For 5633/5643 co-relation queries the response was YES. [2024-06-14 11:19:09,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5645 conditions, 1495 events. 899/1495 cut-off events. For 5633/5643 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7443 event pairs, 310 based on Foata normal form. 12/1507 useless extension candidates. Maximal degree in co-relation 5613. Up to 1258 conditions per place. [2024-06-14 11:19:09,565 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 19 changer transitions 0/105 dead transitions. [2024-06-14 11:19:09,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 815 flow [2024-06-14 11:19:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:09,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 11:19:09,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 11:19:09,567 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 467 flow. Second operand 7 states and 165 transitions. [2024-06-14 11:19:09,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 815 flow [2024-06-14 11:19:09,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 779 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:09,575 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 525 flow [2024-06-14 11:19:09,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2024-06-14 11:19:09,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-14 11:19:09,576 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 525 flow [2024-06-14 11:19:09,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:09,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:09,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:09,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:19:09,577 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)] === [2024-06-14 11:19:09,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1910823424, now seen corresponding path program 3 times [2024-06-14 11:19:09,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:09,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65979883] [2024-06-14 11:19:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:09,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:09,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:09,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65979883] [2024-06-14 11:19:09,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65979883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:09,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:09,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:09,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938603879] [2024-06-14 11:19:09,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:09,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:09,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:09,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:09,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:09,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:09,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 525 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:09,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:09,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:09,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:09,923 INFO L124 PetriNetUnfolderBase]: 894/1486 cut-off events. [2024-06-14 11:19:09,923 INFO L125 PetriNetUnfolderBase]: For 6653/6659 co-relation queries the response was YES. [2024-06-14 11:19:09,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5746 conditions, 1486 events. 894/1486 cut-off events. For 6653/6659 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7329 event pairs, 323 based on Foata normal form. 8/1492 useless extension candidates. Maximal degree in co-relation 5712. Up to 1253 conditions per place. [2024-06-14 11:19:09,982 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 70 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2024-06-14 11:19:09,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 754 flow [2024-06-14 11:19:09,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:09,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 11:19:09,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-14 11:19:09,985 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 525 flow. Second operand 5 states and 124 transitions. [2024-06-14 11:19:09,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 754 flow [2024-06-14 11:19:09,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 700 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:09,993 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 515 flow [2024-06-14 11:19:09,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=515, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-14 11:19:09,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-14 11:19:09,994 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 515 flow [2024-06-14 11:19:09,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:09,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:09,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:09,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:19:09,995 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)] === [2024-06-14 11:19:09,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:09,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1619345834, now seen corresponding path program 1 times [2024-06-14 11:19:09,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:09,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757804201] [2024-06-14 11:19:09,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:09,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:10,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:10,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757804201] [2024-06-14 11:19:10,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757804201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:10,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:10,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:19:10,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826404401] [2024-06-14 11:19:10,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:10,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:19:10,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:10,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:19:10,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:19:10,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:10,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 515 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) [2024-06-14 11:19:10,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:10,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:10,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:10,290 INFO L124 PetriNetUnfolderBase]: 832/1382 cut-off events. [2024-06-14 11:19:10,291 INFO L125 PetriNetUnfolderBase]: For 7418/7420 co-relation queries the response was YES. [2024-06-14 11:19:10,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5520 conditions, 1382 events. 832/1382 cut-off events. For 7418/7420 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6843 event pairs, 278 based on Foata normal form. 3/1372 useless extension candidates. Maximal degree in co-relation 5485. Up to 1228 conditions per place. [2024-06-14 11:19:10,301 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 71 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2024-06-14 11:19:10,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 745 flow [2024-06-14 11:19:10,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:19:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:19:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-14 11:19:10,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:19:10,302 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 515 flow. Second operand 4 states and 96 transitions. [2024-06-14 11:19:10,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 745 flow [2024-06-14 11:19:10,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 91 transitions, 707 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:10,309 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 567 flow [2024-06-14 11:19:10,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=567, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-06-14 11:19:10,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-14 11:19:10,310 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 567 flow [2024-06-14 11:19:10,310 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) [2024-06-14 11:19:10,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:10,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:10,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:19:10,311 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)] === [2024-06-14 11:19:10,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:10,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1734872291, now seen corresponding path program 1 times [2024-06-14 11:19:10,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:10,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428507397] [2024-06-14 11:19:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:10,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:10,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:10,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428507397] [2024-06-14 11:19:10,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428507397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:10,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:10,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:10,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258759089] [2024-06-14 11:19:10,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:10,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:10,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:10,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:10,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:10,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:10,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 567 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:10,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:10,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:10,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:10,682 INFO L124 PetriNetUnfolderBase]: 854/1424 cut-off events. [2024-06-14 11:19:10,682 INFO L125 PetriNetUnfolderBase]: For 9336/9348 co-relation queries the response was YES. [2024-06-14 11:19:10,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6024 conditions, 1424 events. 854/1424 cut-off events. For 9336/9348 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7196 event pairs, 180 based on Foata normal form. 14/1390 useless extension candidates. Maximal degree in co-relation 5987. Up to 1100 conditions per place. [2024-06-14 11:19:10,694 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 65 selfloop transitions, 32 changer transitions 0/112 dead transitions. [2024-06-14 11:19:10,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 112 transitions, 903 flow [2024-06-14 11:19:10,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 11:19:10,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 11:19:10,696 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 567 flow. Second operand 6 states and 150 transitions. [2024-06-14 11:19:10,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 112 transitions, 903 flow [2024-06-14 11:19:10,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 899 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 11:19:10,705 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 674 flow [2024-06-14 11:19:10,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=674, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-14 11:19:10,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-14 11:19:10,706 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 674 flow [2024-06-14 11:19:10,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:10,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:10,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:10,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:19:10,707 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)] === [2024-06-14 11:19:10,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:10,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1834507795, now seen corresponding path program 2 times [2024-06-14 11:19:10,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:10,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408461658] [2024-06-14 11:19:10,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:10,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:10,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:10,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408461658] [2024-06-14 11:19:10,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408461658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:10,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:10,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:10,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659372417] [2024-06-14 11:19:10,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:10,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:10,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:10,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:10,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:10,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:10,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 674 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:10,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:10,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:10,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:11,071 INFO L124 PetriNetUnfolderBase]: 871/1451 cut-off events. [2024-06-14 11:19:11,072 INFO L125 PetriNetUnfolderBase]: For 11627/11646 co-relation queries the response was YES. [2024-06-14 11:19:11,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6503 conditions, 1451 events. 871/1451 cut-off events. For 11627/11646 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7326 event pairs, 252 based on Foata normal form. 12/1411 useless extension candidates. Maximal degree in co-relation 6463. Up to 1198 conditions per place. [2024-06-14 11:19:11,081 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 66 selfloop transitions, 30 changer transitions 0/111 dead transitions. [2024-06-14 11:19:11,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 111 transitions, 946 flow [2024-06-14 11:19:11,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 11:19:11,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 11:19:11,083 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 674 flow. Second operand 6 states and 147 transitions. [2024-06-14 11:19:11,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 111 transitions, 946 flow [2024-06-14 11:19:11,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 111 transitions, 894 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:11,096 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 716 flow [2024-06-14 11:19:11,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=716, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2024-06-14 11:19:11,096 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-14 11:19:11,097 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 716 flow [2024-06-14 11:19:11,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:11,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:11,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:11,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:19:11,097 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)] === [2024-06-14 11:19:11,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:11,098 INFO L85 PathProgramCache]: Analyzing trace with hash 894011795, now seen corresponding path program 3 times [2024-06-14 11:19:11,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:11,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352781565] [2024-06-14 11:19:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:11,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:11,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:11,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352781565] [2024-06-14 11:19:11,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352781565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:11,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:11,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:11,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638614795] [2024-06-14 11:19:11,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:11,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:11,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:11,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:11,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:11,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:11,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 716 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:11,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:11,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:11,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:11,473 INFO L124 PetriNetUnfolderBase]: 859/1435 cut-off events. [2024-06-14 11:19:11,474 INFO L125 PetriNetUnfolderBase]: For 12686/12705 co-relation queries the response was YES. [2024-06-14 11:19:11,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6519 conditions, 1435 events. 859/1435 cut-off events. For 12686/12705 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7256 event pairs, 175 based on Foata normal form. 19/1405 useless extension candidates. Maximal degree in co-relation 6477. Up to 1161 conditions per place. [2024-06-14 11:19:11,482 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 65 selfloop transitions, 27 changer transitions 0/107 dead transitions. [2024-06-14 11:19:11,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 107 transitions, 948 flow [2024-06-14 11:19:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-14 11:19:11,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-14 11:19:11,483 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 716 flow. Second operand 5 states and 127 transitions. [2024-06-14 11:19:11,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 107 transitions, 948 flow [2024-06-14 11:19:11,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 107 transitions, 874 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:11,496 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 708 flow [2024-06-14 11:19:11,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=708, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2024-06-14 11:19:11,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-14 11:19:11,496 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 708 flow [2024-06-14 11:19:11,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:11,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:11,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:11,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:19:11,497 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)] === [2024-06-14 11:19:11,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:11,498 INFO L85 PathProgramCache]: Analyzing trace with hash 946601761, now seen corresponding path program 1 times [2024-06-14 11:19:11,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:11,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864116646] [2024-06-14 11:19:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:11,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:11,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:11,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864116646] [2024-06-14 11:19:11,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864116646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:11,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:11,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:11,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966124850] [2024-06-14 11:19:11,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:11,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:11,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:11,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:11,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:11,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:11,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 708 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:11,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:11,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:11,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:11,888 INFO L124 PetriNetUnfolderBase]: 1027/1715 cut-off events. [2024-06-14 11:19:11,889 INFO L125 PetriNetUnfolderBase]: For 14612/14618 co-relation queries the response was YES. [2024-06-14 11:19:11,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7480 conditions, 1715 events. 1027/1715 cut-off events. For 14612/14618 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8924 event pairs, 225 based on Foata normal form. 18/1732 useless extension candidates. Maximal degree in co-relation 7437. Up to 1134 conditions per place. [2024-06-14 11:19:11,898 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 102 selfloop transitions, 26 changer transitions 0/134 dead transitions. [2024-06-14 11:19:11,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 134 transitions, 1180 flow [2024-06-14 11:19:11,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:19:11,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 11:19:11,900 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 708 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:19:11,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 134 transitions, 1180 flow [2024-06-14 11:19:11,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 134 transitions, 1111 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:11,915 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 755 flow [2024-06-14 11:19:11,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=755, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2024-06-14 11:19:11,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-14 11:19:11,916 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 755 flow [2024-06-14 11:19:11,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:11,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:11,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:11,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:19:11,916 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:11,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:11,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1035167521, now seen corresponding path program 2 times [2024-06-14 11:19:11,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:11,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832448258] [2024-06-14 11:19:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:11,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:12,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:12,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832448258] [2024-06-14 11:19:12,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832448258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:12,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:12,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:12,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266312708] [2024-06-14 11:19:12,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:12,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:12,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:12,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:12,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 755 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:12,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:12,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:12,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:12,319 INFO L124 PetriNetUnfolderBase]: 1154/1928 cut-off events. [2024-06-14 11:19:12,319 INFO L125 PetriNetUnfolderBase]: For 18386/18392 co-relation queries the response was YES. [2024-06-14 11:19:12,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8654 conditions, 1928 events. 1154/1928 cut-off events. For 18386/18392 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10339 event pairs, 334 based on Foata normal form. 18/1945 useless extension candidates. Maximal degree in co-relation 8608. Up to 1458 conditions per place. [2024-06-14 11:19:12,331 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 25 changer transitions 0/134 dead transitions. [2024-06-14 11:19:12,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 134 transitions, 1204 flow [2024-06-14 11:19:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:12,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:19:12,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 11:19:12,333 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 755 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:19:12,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 134 transitions, 1204 flow [2024-06-14 11:19:12,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 134 transitions, 1174 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:12,351 INFO L231 Difference]: Finished difference. Result has 97 places, 96 transitions, 813 flow [2024-06-14 11:19:12,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=813, PETRI_PLACES=97, PETRI_TRANSITIONS=96} [2024-06-14 11:19:12,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-14 11:19:12,352 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 96 transitions, 813 flow [2024-06-14 11:19:12,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:12,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:12,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:12,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:19:12,353 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)] === [2024-06-14 11:19:12,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:12,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1035171241, now seen corresponding path program 3 times [2024-06-14 11:19:12,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:12,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039987550] [2024-06-14 11:19:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:12,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:12,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:12,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039987550] [2024-06-14 11:19:12,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039987550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:12,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:12,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:12,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597833816] [2024-06-14 11:19:12,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:12,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:12,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:12,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:12,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:12,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 96 transitions, 813 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:12,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:12,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:12,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:12,761 INFO L124 PetriNetUnfolderBase]: 1126/1884 cut-off events. [2024-06-14 11:19:12,761 INFO L125 PetriNetUnfolderBase]: For 19358/19364 co-relation queries the response was YES. [2024-06-14 11:19:12,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8588 conditions, 1884 events. 1126/1884 cut-off events. For 19358/19364 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9979 event pairs, 335 based on Foata normal form. 22/1905 useless extension candidates. Maximal degree in co-relation 8539. Up to 1537 conditions per place. [2024-06-14 11:19:12,771 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 100 selfloop transitions, 24 changer transitions 0/130 dead transitions. [2024-06-14 11:19:12,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 130 transitions, 1171 flow [2024-06-14 11:19:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 11:19:12,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 11:19:12,774 INFO L175 Difference]: Start difference. First operand has 97 places, 96 transitions, 813 flow. Second operand 7 states and 166 transitions. [2024-06-14 11:19:12,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 130 transitions, 1171 flow [2024-06-14 11:19:12,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 130 transitions, 1139 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:12,793 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 850 flow [2024-06-14 11:19:12,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=850, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2024-06-14 11:19:12,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-14 11:19:12,794 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 850 flow [2024-06-14 11:19:12,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:12,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:12,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:12,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:19:12,795 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)] === [2024-06-14 11:19:12,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1944710463, now seen corresponding path program 4 times [2024-06-14 11:19:12,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:12,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380787048] [2024-06-14 11:19:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:12,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:12,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:12,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380787048] [2024-06-14 11:19:12,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380787048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:12,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:12,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:12,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382199233] [2024-06-14 11:19:12,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:12,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:12,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:12,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:12,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:12,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:12,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 850 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:12,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:12,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:12,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:13,231 INFO L124 PetriNetUnfolderBase]: 1184/1992 cut-off events. [2024-06-14 11:19:13,231 INFO L125 PetriNetUnfolderBase]: For 21575/21581 co-relation queries the response was YES. [2024-06-14 11:19:13,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9149 conditions, 1992 events. 1184/1992 cut-off events. For 21575/21581 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10834 event pairs, 352 based on Foata normal form. 22/2013 useless extension candidates. Maximal degree in co-relation 9098. Up to 1653 conditions per place. [2024-06-14 11:19:13,243 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 102 selfloop transitions, 19 changer transitions 0/127 dead transitions. [2024-06-14 11:19:13,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 127 transitions, 1191 flow [2024-06-14 11:19:13,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 11:19:13,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 11:19:13,245 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 850 flow. Second operand 6 states and 146 transitions. [2024-06-14 11:19:13,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 127 transitions, 1191 flow [2024-06-14 11:19:13,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 127 transitions, 1146 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:13,265 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 863 flow [2024-06-14 11:19:13,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=863, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2024-06-14 11:19:13,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-14 11:19:13,265 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 863 flow [2024-06-14 11:19:13,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:13,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:13,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:13,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:19:13,266 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)] === [2024-06-14 11:19:13,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:13,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1944562593, now seen corresponding path program 5 times [2024-06-14 11:19:13,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:13,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174873776] [2024-06-14 11:19:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:13,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:13,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:13,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174873776] [2024-06-14 11:19:13,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174873776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:13,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:13,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:13,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315547698] [2024-06-14 11:19:13,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:13,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:13,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:13,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:13,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:13,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:13,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 863 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:13,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:13,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:13,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:13,738 INFO L124 PetriNetUnfolderBase]: 1225/2063 cut-off events. [2024-06-14 11:19:13,738 INFO L125 PetriNetUnfolderBase]: For 23542/23548 co-relation queries the response was YES. [2024-06-14 11:19:13,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9551 conditions, 2063 events. 1225/2063 cut-off events. For 23542/23548 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11306 event pairs, 267 based on Foata normal form. 18/2080 useless extension candidates. Maximal degree in co-relation 9499. Up to 1479 conditions per place. [2024-06-14 11:19:13,751 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 106 selfloop transitions, 22 changer transitions 0/134 dead transitions. [2024-06-14 11:19:13,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 134 transitions, 1309 flow [2024-06-14 11:19:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 11:19:13,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-14 11:19:13,752 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 863 flow. Second operand 6 states and 151 transitions. [2024-06-14 11:19:13,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 134 transitions, 1309 flow [2024-06-14 11:19:13,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 134 transitions, 1270 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:13,774 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 904 flow [2024-06-14 11:19:13,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=904, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2024-06-14 11:19:13,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-14 11:19:13,775 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 904 flow [2024-06-14 11:19:13,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:13,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:13,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:13,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:19:13,776 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)] === [2024-06-14 11:19:13,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:13,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1950072843, now seen corresponding path program 6 times [2024-06-14 11:19:13,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:13,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915572761] [2024-06-14 11:19:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:13,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:13,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:13,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915572761] [2024-06-14 11:19:13,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915572761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:13,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:13,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:13,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180738349] [2024-06-14 11:19:13,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:13,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:13,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:13,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:13,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:13,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:13,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 904 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:13,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:13,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:13,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:14,251 INFO L124 PetriNetUnfolderBase]: 1197/2020 cut-off events. [2024-06-14 11:19:14,251 INFO L125 PetriNetUnfolderBase]: For 24081/24089 co-relation queries the response was YES. [2024-06-14 11:19:14,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9323 conditions, 2020 events. 1197/2020 cut-off events. For 24081/24089 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11045 event pairs, 338 based on Foata normal form. 24/2044 useless extension candidates. Maximal degree in co-relation 9269. Up to 1680 conditions per place. [2024-06-14 11:19:14,263 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 111 selfloop transitions, 21 changer transitions 0/138 dead transitions. [2024-06-14 11:19:14,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 138 transitions, 1292 flow [2024-06-14 11:19:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 11:19:14,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-14 11:19:14,265 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 904 flow. Second operand 8 states and 185 transitions. [2024-06-14 11:19:14,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 138 transitions, 1292 flow [2024-06-14 11:19:14,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 138 transitions, 1210 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:14,289 INFO L231 Difference]: Finished difference. Result has 108 places, 101 transitions, 889 flow [2024-06-14 11:19:14,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=889, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2024-06-14 11:19:14,290 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-14 11:19:14,290 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 889 flow [2024-06-14 11:19:14,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:14,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:14,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:14,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:19:14,291 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)] === [2024-06-14 11:19:14,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:14,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1950288045, now seen corresponding path program 1 times [2024-06-14 11:19:14,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:14,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896680398] [2024-06-14 11:19:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:14,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:14,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:14,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896680398] [2024-06-14 11:19:14,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896680398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:14,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:14,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:14,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956912576] [2024-06-14 11:19:14,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:14,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:14,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:14,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:14,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:14,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:14,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 889 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:14,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:14,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:14,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:14,767 INFO L124 PetriNetUnfolderBase]: 1177/1988 cut-off events. [2024-06-14 11:19:14,767 INFO L125 PetriNetUnfolderBase]: For 22684/22692 co-relation queries the response was YES. [2024-06-14 11:19:14,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8890 conditions, 1988 events. 1177/1988 cut-off events. For 22684/22692 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10796 event pairs, 285 based on Foata normal form. 20/2008 useless extension candidates. Maximal degree in co-relation 8836. Up to 1441 conditions per place. [2024-06-14 11:19:14,779 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 110 selfloop transitions, 25 changer transitions 0/141 dead transitions. [2024-06-14 11:19:14,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 141 transitions, 1243 flow [2024-06-14 11:19:14,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:14,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 11:19:14,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 11:19:14,781 INFO L175 Difference]: Start difference. First operand has 108 places, 101 transitions, 889 flow. Second operand 8 states and 187 transitions. [2024-06-14 11:19:14,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 141 transitions, 1243 flow [2024-06-14 11:19:14,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 141 transitions, 1202 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 11:19:14,804 INFO L231 Difference]: Finished difference. Result has 109 places, 100 transitions, 862 flow [2024-06-14 11:19:14,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=862, PETRI_PLACES=109, PETRI_TRANSITIONS=100} [2024-06-14 11:19:14,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-14 11:19:14,804 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 100 transitions, 862 flow [2024-06-14 11:19:14,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:14,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:14,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:14,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:19:14,805 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:19:14,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:14,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1198249931, now seen corresponding path program 1 times [2024-06-14 11:19:14,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:14,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103331373] [2024-06-14 11:19:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:14,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:14,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:14,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103331373] [2024-06-14 11:19:14,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103331373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:14,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:14,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:14,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243873055] [2024-06-14 11:19:14,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:14,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:14,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:14,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:14,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:14,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:14,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 100 transitions, 862 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) [2024-06-14 11:19:14,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:14,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:14,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:15,179 INFO L124 PetriNetUnfolderBase]: 1127/1918 cut-off events. [2024-06-14 11:19:15,179 INFO L125 PetriNetUnfolderBase]: For 22664/22667 co-relation queries the response was YES. [2024-06-14 11:19:15,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8746 conditions, 1918 events. 1127/1918 cut-off events. For 22664/22667 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10569 event pairs, 308 based on Foata normal form. 5/1908 useless extension candidates. Maximal degree in co-relation 8691. Up to 1703 conditions per place. [2024-06-14 11:19:15,193 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 80 selfloop transitions, 19 changer transitions 0/111 dead transitions. [2024-06-14 11:19:15,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 1102 flow [2024-06-14 11:19:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:19:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:19:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-14 11:19:15,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-14 11:19:15,195 INFO L175 Difference]: Start difference. First operand has 109 places, 100 transitions, 862 flow. Second operand 4 states and 97 transitions. [2024-06-14 11:19:15,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 1102 flow [2024-06-14 11:19:15,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 1032 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:15,243 INFO L231 Difference]: Finished difference. Result has 106 places, 103 transitions, 870 flow [2024-06-14 11:19:15,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=870, PETRI_PLACES=106, PETRI_TRANSITIONS=103} [2024-06-14 11:19:15,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-14 11:19:15,243 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 103 transitions, 870 flow [2024-06-14 11:19:15,243 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) [2024-06-14 11:19:15,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:15,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:15,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:19:15,243 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)] === [2024-06-14 11:19:15,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:15,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1551885911, now seen corresponding path program 2 times [2024-06-14 11:19:15,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:15,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665924864] [2024-06-14 11:19:15,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:15,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:15,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:15,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665924864] [2024-06-14 11:19:15,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665924864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:15,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:15,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:15,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992494899] [2024-06-14 11:19:15,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:15,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:15,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:15,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:15,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:15,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:15,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 103 transitions, 870 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) [2024-06-14 11:19:15,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:15,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:15,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:15,556 INFO L124 PetriNetUnfolderBase]: 1121/1910 cut-off events. [2024-06-14 11:19:15,556 INFO L125 PetriNetUnfolderBase]: For 23506/23509 co-relation queries the response was YES. [2024-06-14 11:19:15,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8697 conditions, 1910 events. 1121/1910 cut-off events. For 23506/23509 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10515 event pairs, 308 based on Foata normal form. 5/1900 useless extension candidates. Maximal degree in co-relation 8642. Up to 1690 conditions per place. [2024-06-14 11:19:15,568 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 81 selfloop transitions, 22 changer transitions 0/115 dead transitions. [2024-06-14 11:19:15,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 1126 flow [2024-06-14 11:19:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-14 11:19:15,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:19:15,569 INFO L175 Difference]: Start difference. First operand has 106 places, 103 transitions, 870 flow. Second operand 5 states and 115 transitions. [2024-06-14 11:19:15,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 1126 flow [2024-06-14 11:19:15,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 115 transitions, 1076 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:15,594 INFO L231 Difference]: Finished difference. Result has 109 places, 106 transitions, 904 flow [2024-06-14 11:19:15,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=904, PETRI_PLACES=109, PETRI_TRANSITIONS=106} [2024-06-14 11:19:15,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-14 11:19:15,594 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 106 transitions, 904 flow [2024-06-14 11:19:15,594 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) [2024-06-14 11:19:15,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:15,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:15,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:19:15,595 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)] === [2024-06-14 11:19:15,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:15,595 INFO L85 PathProgramCache]: Analyzing trace with hash -476668975, now seen corresponding path program 1 times [2024-06-14 11:19:15,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:15,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035065118] [2024-06-14 11:19:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:15,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:15,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:15,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035065118] [2024-06-14 11:19:15,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035065118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:15,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:15,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:15,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501765819] [2024-06-14 11:19:15,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:15,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:15,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:15,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:15,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:15,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:15,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 904 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) [2024-06-14 11:19:15,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:15,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:15,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:15,950 INFO L124 PetriNetUnfolderBase]: 1109/1924 cut-off events. [2024-06-14 11:19:15,951 INFO L125 PetriNetUnfolderBase]: For 23992/23994 co-relation queries the response was YES. [2024-06-14 11:19:15,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8834 conditions, 1924 events. 1109/1924 cut-off events. For 23992/23994 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10752 event pairs, 306 based on Foata normal form. 4/1927 useless extension candidates. Maximal degree in co-relation 8778. Up to 1700 conditions per place. [2024-06-14 11:19:15,960 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 94 selfloop transitions, 22 changer transitions 0/125 dead transitions. [2024-06-14 11:19:15,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 125 transitions, 1272 flow [2024-06-14 11:19:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-14 11:19:15,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-14 11:19:15,961 INFO L175 Difference]: Start difference. First operand has 109 places, 106 transitions, 904 flow. Second operand 5 states and 119 transitions. [2024-06-14 11:19:15,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 125 transitions, 1272 flow [2024-06-14 11:19:15,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 125 transitions, 1214 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:15,984 INFO L231 Difference]: Finished difference. Result has 111 places, 112 transitions, 962 flow [2024-06-14 11:19:15,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=962, PETRI_PLACES=111, PETRI_TRANSITIONS=112} [2024-06-14 11:19:15,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-14 11:19:15,985 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 112 transitions, 962 flow [2024-06-14 11:19:15,985 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) [2024-06-14 11:19:15,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:15,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:15,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:19:15,986 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)] === [2024-06-14 11:19:15,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:15,986 INFO L85 PathProgramCache]: Analyzing trace with hash -57282415, now seen corresponding path program 2 times [2024-06-14 11:19:15,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:15,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139856451] [2024-06-14 11:19:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:15,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:16,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:16,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139856451] [2024-06-14 11:19:16,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139856451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:16,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:16,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:16,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424024589] [2024-06-14 11:19:16,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:16,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:16,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:16,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:16,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:16,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:16,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 112 transitions, 962 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) [2024-06-14 11:19:16,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:16,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:16,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:16,326 INFO L124 PetriNetUnfolderBase]: 1104/1917 cut-off events. [2024-06-14 11:19:16,327 INFO L125 PetriNetUnfolderBase]: For 25924/25926 co-relation queries the response was YES. [2024-06-14 11:19:16,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9035 conditions, 1917 events. 1104/1917 cut-off events. For 25924/25926 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10731 event pairs, 306 based on Foata normal form. 4/1920 useless extension candidates. Maximal degree in co-relation 8978. Up to 1701 conditions per place. [2024-06-14 11:19:16,339 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 95 selfloop transitions, 19 changer transitions 0/123 dead transitions. [2024-06-14 11:19:16,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 123 transitions, 1218 flow [2024-06-14 11:19:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:19:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:19:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-14 11:19:16,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 11:19:16,341 INFO L175 Difference]: Start difference. First operand has 111 places, 112 transitions, 962 flow. Second operand 4 states and 100 transitions. [2024-06-14 11:19:16,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 123 transitions, 1218 flow [2024-06-14 11:19:16,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 123 transitions, 1163 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-14 11:19:16,369 INFO L231 Difference]: Finished difference. Result has 114 places, 112 transitions, 957 flow [2024-06-14 11:19:16,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=957, PETRI_PLACES=114, PETRI_TRANSITIONS=112} [2024-06-14 11:19:16,370 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-14 11:19:16,370 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 112 transitions, 957 flow [2024-06-14 11:19:16,370 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) [2024-06-14 11:19:16,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:16,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:16,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:19:16,371 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)] === [2024-06-14 11:19:16,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:16,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1551871031, now seen corresponding path program 1 times [2024-06-14 11:19:16,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:16,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518720184] [2024-06-14 11:19:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:16,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:16,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:16,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518720184] [2024-06-14 11:19:16,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518720184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:16,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:16,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:19:16,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082173259] [2024-06-14 11:19:16,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:16,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:19:16,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:16,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:19:16,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:19:16,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:16,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 112 transitions, 957 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) [2024-06-14 11:19:16,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:16,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:16,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:16,749 INFO L124 PetriNetUnfolderBase]: 1111/1912 cut-off events. [2024-06-14 11:19:16,750 INFO L125 PetriNetUnfolderBase]: For 27477/27482 co-relation queries the response was YES. [2024-06-14 11:19:16,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8993 conditions, 1912 events. 1111/1912 cut-off events. For 27477/27482 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10628 event pairs, 292 based on Foata normal form. 7/1906 useless extension candidates. Maximal degree in co-relation 8934. Up to 1704 conditions per place. [2024-06-14 11:19:16,763 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 102 selfloop transitions, 11 changer transitions 0/125 dead transitions. [2024-06-14 11:19:16,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 125 transitions, 1228 flow [2024-06-14 11:19:16,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:16,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:16,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-14 11:19:16,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-14 11:19:16,765 INFO L175 Difference]: Start difference. First operand has 114 places, 112 transitions, 957 flow. Second operand 5 states and 113 transitions. [2024-06-14 11:19:16,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 125 transitions, 1228 flow [2024-06-14 11:19:16,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 125 transitions, 1190 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:16,797 INFO L231 Difference]: Finished difference. Result has 116 places, 114 transitions, 966 flow [2024-06-14 11:19:16,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=966, PETRI_PLACES=116, PETRI_TRANSITIONS=114} [2024-06-14 11:19:16,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-14 11:19:16,798 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 114 transitions, 966 flow [2024-06-14 11:19:16,798 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) [2024-06-14 11:19:16,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:16,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:16,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:19:16,798 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)] === [2024-06-14 11:19:16,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:16,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1658312787, now seen corresponding path program 1 times [2024-06-14 11:19:16,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:16,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571605981] [2024-06-14 11:19:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:16,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:16,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:16,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571605981] [2024-06-14 11:19:16,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571605981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:16,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:16,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:16,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410628745] [2024-06-14 11:19:16,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:16,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:16,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:16,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:16,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:16,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:16,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 114 transitions, 966 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) [2024-06-14 11:19:16,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:16,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:16,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:17,192 INFO L124 PetriNetUnfolderBase]: 1193/2032 cut-off events. [2024-06-14 11:19:17,193 INFO L125 PetriNetUnfolderBase]: For 28946/28952 co-relation queries the response was YES. [2024-06-14 11:19:17,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9648 conditions, 2032 events. 1193/2032 cut-off events. For 28946/28952 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11221 event pairs, 308 based on Foata normal form. 7/2039 useless extension candidates. Maximal degree in co-relation 9588. Up to 1807 conditions per place. [2024-06-14 11:19:17,204 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 118 selfloop transitions, 26 changer transitions 0/150 dead transitions. [2024-06-14 11:19:17,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 150 transitions, 1479 flow [2024-06-14 11:19:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:17,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:17,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 11:19:17,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-14 11:19:17,205 INFO L175 Difference]: Start difference. First operand has 116 places, 114 transitions, 966 flow. Second operand 8 states and 170 transitions. [2024-06-14 11:19:17,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 150 transitions, 1479 flow [2024-06-14 11:19:17,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 150 transitions, 1443 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:17,236 INFO L231 Difference]: Finished difference. Result has 123 places, 129 transitions, 1138 flow [2024-06-14 11:19:17,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1138, PETRI_PLACES=123, PETRI_TRANSITIONS=129} [2024-06-14 11:19:17,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-14 11:19:17,237 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 129 transitions, 1138 flow [2024-06-14 11:19:17,237 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) [2024-06-14 11:19:17,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:17,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:17,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:19:17,237 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)] === [2024-06-14 11:19:17,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:17,238 INFO L85 PathProgramCache]: Analyzing trace with hash -163893285, now seen corresponding path program 2 times [2024-06-14 11:19:17,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:17,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322629334] [2024-06-14 11:19:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:17,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:17,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:17,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322629334] [2024-06-14 11:19:17,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322629334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:17,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:17,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:17,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437576223] [2024-06-14 11:19:17,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:17,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:17,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:17,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:17,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:17,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:17,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 1138 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) [2024-06-14 11:19:17,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:17,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:17,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:17,644 INFO L124 PetriNetUnfolderBase]: 1198/2038 cut-off events. [2024-06-14 11:19:17,644 INFO L125 PetriNetUnfolderBase]: For 31774/31774 co-relation queries the response was YES. [2024-06-14 11:19:17,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10018 conditions, 2038 events. 1198/2038 cut-off events. For 31774/31774 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11224 event pairs, 317 based on Foata normal form. 1/2038 useless extension candidates. Maximal degree in co-relation 9955. Up to 1813 conditions per place. [2024-06-14 11:19:17,655 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 112 selfloop transitions, 26 changer transitions 0/144 dead transitions. [2024-06-14 11:19:17,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 144 transitions, 1526 flow [2024-06-14 11:19:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:17,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-14 11:19:17,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-14 11:19:17,657 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 1138 flow. Second operand 5 states and 114 transitions. [2024-06-14 11:19:17,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 144 transitions, 1526 flow [2024-06-14 11:19:17,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 144 transitions, 1462 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:17,690 INFO L231 Difference]: Finished difference. Result has 125 places, 132 transitions, 1158 flow [2024-06-14 11:19:17,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1158, PETRI_PLACES=125, PETRI_TRANSITIONS=132} [2024-06-14 11:19:17,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-14 11:19:17,690 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 132 transitions, 1158 flow [2024-06-14 11:19:17,691 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) [2024-06-14 11:19:17,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:17,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:17,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:19:17,692 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)] === [2024-06-14 11:19:17,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash -163904445, now seen corresponding path program 3 times [2024-06-14 11:19:17,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:17,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609180555] [2024-06-14 11:19:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:17,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:17,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:17,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609180555] [2024-06-14 11:19:17,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609180555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:17,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:17,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:17,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847470540] [2024-06-14 11:19:17,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:17,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:17,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:17,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:17,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:17,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:17,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 132 transitions, 1158 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) [2024-06-14 11:19:17,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:17,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:17,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:18,115 INFO L124 PetriNetUnfolderBase]: 1195/2037 cut-off events. [2024-06-14 11:19:18,116 INFO L125 PetriNetUnfolderBase]: For 33315/33323 co-relation queries the response was YES. [2024-06-14 11:19:18,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10007 conditions, 2037 events. 1195/2037 cut-off events. For 33315/33323 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11264 event pairs, 308 based on Foata normal form. 9/2046 useless extension candidates. Maximal degree in co-relation 9943. Up to 1810 conditions per place. [2024-06-14 11:19:18,127 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 117 selfloop transitions, 28 changer transitions 0/151 dead transitions. [2024-06-14 11:19:18,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 151 transitions, 1500 flow [2024-06-14 11:19:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 11:19:18,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 11:19:18,136 INFO L175 Difference]: Start difference. First operand has 125 places, 132 transitions, 1158 flow. Second operand 7 states and 152 transitions. [2024-06-14 11:19:18,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 151 transitions, 1500 flow [2024-06-14 11:19:18,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 151 transitions, 1451 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:18,175 INFO L231 Difference]: Finished difference. Result has 130 places, 132 transitions, 1175 flow [2024-06-14 11:19:18,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1175, PETRI_PLACES=130, PETRI_TRANSITIONS=132} [2024-06-14 11:19:18,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-14 11:19:18,175 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 132 transitions, 1175 flow [2024-06-14 11:19:18,176 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) [2024-06-14 11:19:18,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:18,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:18,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:19:18,176 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)] === [2024-06-14 11:19:18,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:18,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1709081769, now seen corresponding path program 4 times [2024-06-14 11:19:18,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:18,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103995178] [2024-06-14 11:19:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:18,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:18,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:18,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103995178] [2024-06-14 11:19:18,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103995178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:18,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:18,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:18,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759258870] [2024-06-14 11:19:18,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:18,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:18,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:18,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:18,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:18,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 132 transitions, 1175 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) [2024-06-14 11:19:18,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:18,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:18,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:18,549 INFO L124 PetriNetUnfolderBase]: 1192/2017 cut-off events. [2024-06-14 11:19:18,549 INFO L125 PetriNetUnfolderBase]: For 35092/35092 co-relation queries the response was YES. [2024-06-14 11:19:18,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10043 conditions, 2017 events. 1192/2017 cut-off events. For 35092/35092 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11050 event pairs, 317 based on Foata normal form. 1/2017 useless extension candidates. Maximal degree in co-relation 9978. Up to 1800 conditions per place. [2024-06-14 11:19:18,559 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 113 selfloop transitions, 31 changer transitions 0/150 dead transitions. [2024-06-14 11:19:18,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 150 transitions, 1535 flow [2024-06-14 11:19:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-14 11:19:18,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 11:19:18,560 INFO L175 Difference]: Start difference. First operand has 130 places, 132 transitions, 1175 flow. Second operand 6 states and 130 transitions. [2024-06-14 11:19:18,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 150 transitions, 1535 flow [2024-06-14 11:19:18,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 150 transitions, 1466 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:18,601 INFO L231 Difference]: Finished difference. Result has 130 places, 138 transitions, 1226 flow [2024-06-14 11:19:18,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1226, PETRI_PLACES=130, PETRI_TRANSITIONS=138} [2024-06-14 11:19:18,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-14 11:19:18,602 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 138 transitions, 1226 flow [2024-06-14 11:19:18,602 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) [2024-06-14 11:19:18,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:18,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:18,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:19:18,603 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)] === [2024-06-14 11:19:18,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:18,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1891835097, now seen corresponding path program 1 times [2024-06-14 11:19:18,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:18,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716051872] [2024-06-14 11:19:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:18,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:18,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:18,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716051872] [2024-06-14 11:19:18,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716051872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:18,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:18,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:18,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992577069] [2024-06-14 11:19:18,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:18,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:18,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:18,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:18,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:18,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:18,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 138 transitions, 1226 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) [2024-06-14 11:19:18,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:18,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:18,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:18,952 INFO L124 PetriNetUnfolderBase]: 1197/2028 cut-off events. [2024-06-14 11:19:18,952 INFO L125 PetriNetUnfolderBase]: For 34929/34931 co-relation queries the response was YES. [2024-06-14 11:19:18,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10271 conditions, 2028 events. 1197/2028 cut-off events. For 34929/34931 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11141 event pairs, 306 based on Foata normal form. 3/2031 useless extension candidates. Maximal degree in co-relation 10205. Up to 1823 conditions per place. [2024-06-14 11:19:18,965 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 141 selfloop transitions, 21 changer transitions 0/168 dead transitions. [2024-06-14 11:19:18,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 168 transitions, 1756 flow [2024-06-14 11:19:18,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:18,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-14 11:19:18,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-14 11:19:18,966 INFO L175 Difference]: Start difference. First operand has 130 places, 138 transitions, 1226 flow. Second operand 6 states and 134 transitions. [2024-06-14 11:19:18,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 168 transitions, 1756 flow [2024-06-14 11:19:19,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 168 transitions, 1703 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:19,015 INFO L231 Difference]: Finished difference. Result has 136 places, 150 transitions, 1344 flow [2024-06-14 11:19:19,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1344, PETRI_PLACES=136, PETRI_TRANSITIONS=150} [2024-06-14 11:19:19,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-14 11:19:19,016 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 150 transitions, 1344 flow [2024-06-14 11:19:19,016 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) [2024-06-14 11:19:19,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:19,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:19,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:19:19,016 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)] === [2024-06-14 11:19:19,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:19,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1775748045, now seen corresponding path program 2 times [2024-06-14 11:19:19,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:19,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465598761] [2024-06-14 11:19:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:19,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:19,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:19,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465598761] [2024-06-14 11:19:19,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465598761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:19,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:19,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:19,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457696041] [2024-06-14 11:19:19,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:19,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:19,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:19,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:19,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:19,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:19,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 150 transitions, 1344 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) [2024-06-14 11:19:19,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:19,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:19,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:19,450 INFO L124 PetriNetUnfolderBase]: 1202/2037 cut-off events. [2024-06-14 11:19:19,450 INFO L125 PetriNetUnfolderBase]: For 37822/37826 co-relation queries the response was YES. [2024-06-14 11:19:19,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10699 conditions, 2037 events. 1202/2037 cut-off events. For 37822/37826 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11182 event pairs, 304 based on Foata normal form. 5/2042 useless extension candidates. Maximal degree in co-relation 10629. Up to 1835 conditions per place. [2024-06-14 11:19:19,460 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 145 selfloop transitions, 22 changer transitions 0/173 dead transitions. [2024-06-14 11:19:19,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 173 transitions, 1836 flow [2024-06-14 11:19:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 11:19:19,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-14 11:19:19,461 INFO L175 Difference]: Start difference. First operand has 136 places, 150 transitions, 1344 flow. Second operand 7 states and 150 transitions. [2024-06-14 11:19:19,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 173 transitions, 1836 flow [2024-06-14 11:19:19,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 173 transitions, 1784 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:19,501 INFO L231 Difference]: Finished difference. Result has 142 places, 155 transitions, 1398 flow [2024-06-14 11:19:19,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1398, PETRI_PLACES=142, PETRI_TRANSITIONS=155} [2024-06-14 11:19:19,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-14 11:19:19,502 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 155 transitions, 1398 flow [2024-06-14 11:19:19,502 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) [2024-06-14 11:19:19,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:19,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:19,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:19:19,503 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)] === [2024-06-14 11:19:19,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:19,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1775753625, now seen corresponding path program 3 times [2024-06-14 11:19:19,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:19,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534414076] [2024-06-14 11:19:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:19,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:19,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:19,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534414076] [2024-06-14 11:19:19,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534414076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:19,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:19,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:19,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521030869] [2024-06-14 11:19:19,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:19,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:19,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:19,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:19,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:19,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:19,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 155 transitions, 1398 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) [2024-06-14 11:19:19,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:19,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:19,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:19,927 INFO L124 PetriNetUnfolderBase]: 1199/2033 cut-off events. [2024-06-14 11:19:19,927 INFO L125 PetriNetUnfolderBase]: For 39693/39697 co-relation queries the response was YES. [2024-06-14 11:19:19,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10710 conditions, 2033 events. 1199/2033 cut-off events. For 39693/39697 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11155 event pairs, 306 based on Foata normal form. 5/2038 useless extension candidates. Maximal degree in co-relation 10638. Up to 1832 conditions per place. [2024-06-14 11:19:19,941 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 144 selfloop transitions, 20 changer transitions 0/170 dead transitions. [2024-06-14 11:19:19,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 170 transitions, 1773 flow [2024-06-14 11:19:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-14 11:19:19,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-14 11:19:19,943 INFO L175 Difference]: Start difference. First operand has 142 places, 155 transitions, 1398 flow. Second operand 5 states and 116 transitions. [2024-06-14 11:19:19,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 170 transitions, 1773 flow [2024-06-14 11:19:19,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 170 transitions, 1701 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:19,992 INFO L231 Difference]: Finished difference. Result has 143 places, 155 transitions, 1372 flow [2024-06-14 11:19:19,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1372, PETRI_PLACES=143, PETRI_TRANSITIONS=155} [2024-06-14 11:19:19,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-14 11:19:19,992 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 155 transitions, 1372 flow [2024-06-14 11:19:19,992 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) [2024-06-14 11:19:19,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:19,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:19,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:19:19,993 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)] === [2024-06-14 11:19:19,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:19,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1408165366, now seen corresponding path program 1 times [2024-06-14 11:19:19,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:19,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503709281] [2024-06-14 11:19:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:19,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:20,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:20,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503709281] [2024-06-14 11:19:20,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503709281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:20,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:20,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:20,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602321669] [2024-06-14 11:19:20,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:20,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:20,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:20,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:20,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:20,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:20,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 155 transitions, 1372 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) [2024-06-14 11:19:20,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:20,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:20,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:20,420 INFO L124 PetriNetUnfolderBase]: 1165/1986 cut-off events. [2024-06-14 11:19:20,420 INFO L125 PetriNetUnfolderBase]: For 43624/43629 co-relation queries the response was YES. [2024-06-14 11:19:20,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10551 conditions, 1986 events. 1165/1986 cut-off events. For 43624/43629 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11013 event pairs, 302 based on Foata normal form. 9/1980 useless extension candidates. Maximal degree in co-relation 10478. Up to 1713 conditions per place. [2024-06-14 11:19:20,432 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 121 selfloop transitions, 27 changer transitions 0/167 dead transitions. [2024-06-14 11:19:20,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 167 transitions, 1720 flow [2024-06-14 11:19:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:20,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-14 11:19:20,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-14 11:19:20,434 INFO L175 Difference]: Start difference. First operand has 143 places, 155 transitions, 1372 flow. Second operand 5 states and 116 transitions. [2024-06-14 11:19:20,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 167 transitions, 1720 flow [2024-06-14 11:19:20,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 167 transitions, 1680 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:20,493 INFO L231 Difference]: Finished difference. Result has 144 places, 157 transitions, 1428 flow [2024-06-14 11:19:20,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1428, PETRI_PLACES=144, PETRI_TRANSITIONS=157} [2024-06-14 11:19:20,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-14 11:19:20,493 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 157 transitions, 1428 flow [2024-06-14 11:19:20,494 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) [2024-06-14 11:19:20,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:20,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:20,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:19:20,494 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)] === [2024-06-14 11:19:20,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:20,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1008668056, now seen corresponding path program 2 times [2024-06-14 11:19:20,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:20,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468700413] [2024-06-14 11:19:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:20,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:20,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:20,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468700413] [2024-06-14 11:19:20,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468700413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:20,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:20,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:20,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525863078] [2024-06-14 11:19:20,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:20,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:20,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:20,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:20,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:20,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:20,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 157 transitions, 1428 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) [2024-06-14 11:19:20,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:20,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:20,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:20,914 INFO L124 PetriNetUnfolderBase]: 1177/2006 cut-off events. [2024-06-14 11:19:20,914 INFO L125 PetriNetUnfolderBase]: For 46673/46678 co-relation queries the response was YES. [2024-06-14 11:19:20,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10882 conditions, 2006 events. 1177/2006 cut-off events. For 46673/46678 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11142 event pairs, 306 based on Foata normal form. 9/2000 useless extension candidates. Maximal degree in co-relation 10808. Up to 1739 conditions per place. [2024-06-14 11:19:20,928 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 121 selfloop transitions, 30 changer transitions 0/170 dead transitions. [2024-06-14 11:19:20,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 170 transitions, 1788 flow [2024-06-14 11:19:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 11:19:20,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-14 11:19:20,929 INFO L175 Difference]: Start difference. First operand has 144 places, 157 transitions, 1428 flow. Second operand 6 states and 133 transitions. [2024-06-14 11:19:20,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 170 transitions, 1788 flow [2024-06-14 11:19:20,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 170 transitions, 1720 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:20,993 INFO L231 Difference]: Finished difference. Result has 147 places, 159 transitions, 1462 flow [2024-06-14 11:19:20,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1462, PETRI_PLACES=147, PETRI_TRANSITIONS=159} [2024-06-14 11:19:20,993 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-14 11:19:20,994 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 159 transitions, 1462 flow [2024-06-14 11:19:20,994 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) [2024-06-14 11:19:20,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:20,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:20,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:19:20,994 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)] === [2024-06-14 11:19:20,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:20,995 INFO L85 PathProgramCache]: Analyzing trace with hash -994383256, now seen corresponding path program 3 times [2024-06-14 11:19:20,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:20,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830333848] [2024-06-14 11:19:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:20,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:21,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830333848] [2024-06-14 11:19:21,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830333848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:21,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:21,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:21,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927328128] [2024-06-14 11:19:21,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:21,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:21,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:21,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:21,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:21,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 159 transitions, 1462 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) [2024-06-14 11:19:21,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:21,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:21,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:21,398 INFO L124 PetriNetUnfolderBase]: 1167/1992 cut-off events. [2024-06-14 11:19:21,398 INFO L125 PetriNetUnfolderBase]: For 47210/47215 co-relation queries the response was YES. [2024-06-14 11:19:21,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10777 conditions, 1992 events. 1167/1992 cut-off events. For 47210/47215 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11073 event pairs, 300 based on Foata normal form. 9/1986 useless extension candidates. Maximal degree in co-relation 10702. Up to 1687 conditions per place. [2024-06-14 11:19:21,413 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 120 selfloop transitions, 34 changer transitions 0/173 dead transitions. [2024-06-14 11:19:21,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 173 transitions, 1834 flow [2024-06-14 11:19:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-14 11:19:21,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-14 11:19:21,414 INFO L175 Difference]: Start difference. First operand has 147 places, 159 transitions, 1462 flow. Second operand 6 states and 134 transitions. [2024-06-14 11:19:21,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 173 transitions, 1834 flow [2024-06-14 11:19:21,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 173 transitions, 1750 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:21,478 INFO L231 Difference]: Finished difference. Result has 149 places, 161 transitions, 1491 flow [2024-06-14 11:19:21,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1491, PETRI_PLACES=149, PETRI_TRANSITIONS=161} [2024-06-14 11:19:21,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-14 11:19:21,478 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 161 transitions, 1491 flow [2024-06-14 11:19:21,478 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) [2024-06-14 11:19:21,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:21,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:21,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:19:21,479 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)] === [2024-06-14 11:19:21,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:21,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1923499314, now seen corresponding path program 1 times [2024-06-14 11:19:21,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:21,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745460030] [2024-06-14 11:19:21,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:21,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:21,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:21,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745460030] [2024-06-14 11:19:21,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745460030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:21,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:21,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:21,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017979874] [2024-06-14 11:19:21,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:21,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:21,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:21,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:21,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:21,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:21,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 161 transitions, 1491 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) [2024-06-14 11:19:21,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:21,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:21,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:21,878 INFO L124 PetriNetUnfolderBase]: 1178/2012 cut-off events. [2024-06-14 11:19:21,878 INFO L125 PetriNetUnfolderBase]: For 50400/50404 co-relation queries the response was YES. [2024-06-14 11:19:21,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11028 conditions, 2012 events. 1178/2012 cut-off events. For 50400/50404 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11192 event pairs, 261 based on Foata normal form. 8/2013 useless extension candidates. Maximal degree in co-relation 10952. Up to 1686 conditions per place. [2024-06-14 11:19:21,892 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 136 selfloop transitions, 32 changer transitions 0/184 dead transitions. [2024-06-14 11:19:21,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 184 transitions, 2009 flow [2024-06-14 11:19:21,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:21,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 11:19:21,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 11:19:21,893 INFO L175 Difference]: Start difference. First operand has 149 places, 161 transitions, 1491 flow. Second operand 6 states and 141 transitions. [2024-06-14 11:19:21,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 184 transitions, 2009 flow [2024-06-14 11:19:21,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 184 transitions, 1912 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:21,957 INFO L231 Difference]: Finished difference. Result has 151 places, 165 transitions, 1535 flow [2024-06-14 11:19:21,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1535, PETRI_PLACES=151, PETRI_TRANSITIONS=165} [2024-06-14 11:19:21,957 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-14 11:19:21,957 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 165 transitions, 1535 flow [2024-06-14 11:19:21,958 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) [2024-06-14 11:19:21,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:21,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:21,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:19:21,958 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)] === [2024-06-14 11:19:21,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:21,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1920820914, now seen corresponding path program 2 times [2024-06-14 11:19:21,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:21,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602325346] [2024-06-14 11:19:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:21,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:22,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:22,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602325346] [2024-06-14 11:19:22,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602325346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:22,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:22,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:22,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149081991] [2024-06-14 11:19:22,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:22,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:22,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:22,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:22,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:22,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:22,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 165 transitions, 1535 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) [2024-06-14 11:19:22,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:22,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:22,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:22,363 INFO L124 PetriNetUnfolderBase]: 1192/2034 cut-off events. [2024-06-14 11:19:22,363 INFO L125 PetriNetUnfolderBase]: For 53248/53252 co-relation queries the response was YES. [2024-06-14 11:19:22,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11232 conditions, 2034 events. 1192/2034 cut-off events. For 53248/53252 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11360 event pairs, 298 based on Foata normal form. 8/2035 useless extension candidates. Maximal degree in co-relation 11155. Up to 1768 conditions per place. [2024-06-14 11:19:22,378 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 135 selfloop transitions, 30 changer transitions 0/181 dead transitions. [2024-06-14 11:19:22,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 181 transitions, 1937 flow [2024-06-14 11:19:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:22,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 11:19:22,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 11:19:22,378 INFO L175 Difference]: Start difference. First operand has 151 places, 165 transitions, 1535 flow. Second operand 6 states and 136 transitions. [2024-06-14 11:19:22,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 181 transitions, 1937 flow [2024-06-14 11:19:22,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 181 transitions, 1861 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:22,454 INFO L231 Difference]: Finished difference. Result has 155 places, 167 transitions, 1567 flow [2024-06-14 11:19:22,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1567, PETRI_PLACES=155, PETRI_TRANSITIONS=167} [2024-06-14 11:19:22,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-14 11:19:22,455 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 167 transitions, 1567 flow [2024-06-14 11:19:22,455 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) [2024-06-14 11:19:22,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:22,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:22,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:19:22,455 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)] === [2024-06-14 11:19:22,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:22,456 INFO L85 PathProgramCache]: Analyzing trace with hash 786208784, now seen corresponding path program 3 times [2024-06-14 11:19:22,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:22,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036413968] [2024-06-14 11:19:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:22,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:22,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:22,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036413968] [2024-06-14 11:19:22,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036413968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:22,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:22,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:19:22,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096815233] [2024-06-14 11:19:22,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:22,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:19:22,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:22,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:19:22,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:19:22,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 11:19:22,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 167 transitions, 1567 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) [2024-06-14 11:19:22,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:22,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 11:19:22,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:22,887 INFO L124 PetriNetUnfolderBase]: 1182/2020 cut-off events. [2024-06-14 11:19:22,887 INFO L125 PetriNetUnfolderBase]: For 53363/53367 co-relation queries the response was YES. [2024-06-14 11:19:22,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11046 conditions, 2020 events. 1182/2020 cut-off events. For 53363/53367 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11257 event pairs, 259 based on Foata normal form. 8/2021 useless extension candidates. Maximal degree in co-relation 10967. Up to 1726 conditions per place. [2024-06-14 11:19:22,898 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 140 selfloop transitions, 27 changer transitions 0/183 dead transitions. [2024-06-14 11:19:22,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 183 transitions, 1941 flow [2024-06-14 11:19:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:19:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:19:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 11:19:22,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-14 11:19:22,899 INFO L175 Difference]: Start difference. First operand has 155 places, 167 transitions, 1567 flow. Second operand 5 states and 122 transitions. [2024-06-14 11:19:22,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 183 transitions, 1941 flow [2024-06-14 11:19:22,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 183 transitions, 1843 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:22,967 INFO L231 Difference]: Finished difference. Result has 156 places, 167 transitions, 1533 flow [2024-06-14 11:19:22,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1533, PETRI_PLACES=156, PETRI_TRANSITIONS=167} [2024-06-14 11:19:22,968 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-14 11:19:22,968 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 167 transitions, 1533 flow [2024-06-14 11:19:22,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:19:22,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:22,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:22,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:19:22,969 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)] === [2024-06-14 11:19:22,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:22,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1011039204, now seen corresponding path program 1 times [2024-06-14 11:19:22,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:22,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330502068] [2024-06-14 11:19:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:22,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:23,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:23,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330502068] [2024-06-14 11:19:23,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330502068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:23,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:23,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:23,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044292811] [2024-06-14 11:19:23,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:23,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:23,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:23,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:23,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:23,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:23,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 167 transitions, 1533 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) [2024-06-14 11:19:23,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:23,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:23,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:23,471 INFO L124 PetriNetUnfolderBase]: 1317/2220 cut-off events. [2024-06-14 11:19:23,471 INFO L125 PetriNetUnfolderBase]: For 62654/62662 co-relation queries the response was YES. [2024-06-14 11:19:23,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12142 conditions, 2220 events. 1317/2220 cut-off events. For 62654/62662 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12406 event pairs, 246 based on Foata normal form. 14/2234 useless extension candidates. Maximal degree in co-relation 12062. Up to 1866 conditions per place. [2024-06-14 11:19:23,486 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 35 changer transitions 0/205 dead transitions. [2024-06-14 11:19:23,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 205 transitions, 2161 flow [2024-06-14 11:19:23,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:19:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:19:23,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 11:19:23,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 11:19:23,487 INFO L175 Difference]: Start difference. First operand has 156 places, 167 transitions, 1533 flow. Second operand 9 states and 195 transitions. [2024-06-14 11:19:23,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 205 transitions, 2161 flow [2024-06-14 11:19:23,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 205 transitions, 2099 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:23,560 INFO L231 Difference]: Finished difference. Result has 163 places, 172 transitions, 1611 flow [2024-06-14 11:19:23,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1611, PETRI_PLACES=163, PETRI_TRANSITIONS=172} [2024-06-14 11:19:23,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-14 11:19:23,561 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 172 transitions, 1611 flow [2024-06-14 11:19:23,561 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) [2024-06-14 11:19:23,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:23,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:23,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:19:23,561 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)] === [2024-06-14 11:19:23,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:23,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1277062914, now seen corresponding path program 2 times [2024-06-14 11:19:23,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:23,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324475083] [2024-06-14 11:19:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:23,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:23,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:23,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324475083] [2024-06-14 11:19:23,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324475083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:23,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:23,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:23,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282567542] [2024-06-14 11:19:23,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:23,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:23,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:23,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:23,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:23,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:23,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 172 transitions, 1611 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) [2024-06-14 11:19:23,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:23,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:23,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:24,024 INFO L124 PetriNetUnfolderBase]: 1345/2268 cut-off events. [2024-06-14 11:19:24,024 INFO L125 PetriNetUnfolderBase]: For 67697/67705 co-relation queries the response was YES. [2024-06-14 11:19:24,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12576 conditions, 2268 events. 1345/2268 cut-off events. For 67697/67705 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12739 event pairs, 327 based on Foata normal form. 16/2284 useless extension candidates. Maximal degree in co-relation 12493. Up to 2010 conditions per place. [2024-06-14 11:19:24,038 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 162 selfloop transitions, 30 changer transitions 0/198 dead transitions. [2024-06-14 11:19:24,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 198 transitions, 2090 flow [2024-06-14 11:19:24,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:19:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:19:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-14 11:19:24,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-14 11:19:24,039 INFO L175 Difference]: Start difference. First operand has 163 places, 172 transitions, 1611 flow. Second operand 9 states and 188 transitions. [2024-06-14 11:19:24,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 198 transitions, 2090 flow [2024-06-14 11:19:24,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 198 transitions, 2045 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:24,137 INFO L231 Difference]: Finished difference. Result has 168 places, 173 transitions, 1644 flow [2024-06-14 11:19:24,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1644, PETRI_PLACES=168, PETRI_TRANSITIONS=173} [2024-06-14 11:19:24,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-14 11:19:24,138 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 173 transitions, 1644 flow [2024-06-14 11:19:24,138 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) [2024-06-14 11:19:24,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:24,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:24,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:19:24,138 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)] === [2024-06-14 11:19:24,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:24,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1276736484, now seen corresponding path program 3 times [2024-06-14 11:19:24,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:24,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000280392] [2024-06-14 11:19:24,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:24,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:24,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:24,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000280392] [2024-06-14 11:19:24,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000280392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:24,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:24,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:24,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689037993] [2024-06-14 11:19:24,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:24,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:24,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:24,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:24,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:24,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:24,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 173 transitions, 1644 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) [2024-06-14 11:19:24,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:24,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:24,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:24,621 INFO L124 PetriNetUnfolderBase]: 1373/2312 cut-off events. [2024-06-14 11:19:24,621 INFO L125 PetriNetUnfolderBase]: For 69678/69686 co-relation queries the response was YES. [2024-06-14 11:19:24,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12917 conditions, 2312 events. 1373/2312 cut-off events. For 69678/69686 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13028 event pairs, 325 based on Foata normal form. 14/2326 useless extension candidates. Maximal degree in co-relation 12832. Up to 2024 conditions per place. [2024-06-14 11:19:24,637 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 166 selfloop transitions, 33 changer transitions 0/205 dead transitions. [2024-06-14 11:19:24,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 205 transitions, 2177 flow [2024-06-14 11:19:24,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:19:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:19:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 11:19:24,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2024-06-14 11:19:24,638 INFO L175 Difference]: Start difference. First operand has 168 places, 173 transitions, 1644 flow. Second operand 10 states and 207 transitions. [2024-06-14 11:19:24,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 205 transitions, 2177 flow [2024-06-14 11:19:24,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 205 transitions, 2118 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:24,758 INFO L231 Difference]: Finished difference. Result has 172 places, 176 transitions, 1700 flow [2024-06-14 11:19:24,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1700, PETRI_PLACES=172, PETRI_TRANSITIONS=176} [2024-06-14 11:19:24,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-14 11:19:24,759 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 176 transitions, 1700 flow [2024-06-14 11:19:24,759 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) [2024-06-14 11:19:24,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:24,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:24,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:19:24,759 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)] === [2024-06-14 11:19:24,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:24,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1099577064, now seen corresponding path program 1 times [2024-06-14 11:19:24,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:24,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003217549] [2024-06-14 11:19:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:24,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:24,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:24,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003217549] [2024-06-14 11:19:24,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003217549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:24,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:24,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:24,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218702491] [2024-06-14 11:19:24,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:24,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:24,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:24,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:24,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:24,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:24,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 176 transitions, 1700 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) [2024-06-14 11:19:24,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:24,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:24,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:25,195 INFO L124 PetriNetUnfolderBase]: 1386/2341 cut-off events. [2024-06-14 11:19:25,195 INFO L125 PetriNetUnfolderBase]: For 70576/70584 co-relation queries the response was YES. [2024-06-14 11:19:25,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13240 conditions, 2341 events. 1386/2341 cut-off events. For 70576/70584 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13281 event pairs, 363 based on Foata normal form. 9/2349 useless extension candidates. Maximal degree in co-relation 13153. Up to 1969 conditions per place. [2024-06-14 11:19:25,212 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 150 selfloop transitions, 54 changer transitions 0/210 dead transitions. [2024-06-14 11:19:25,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 210 transitions, 2444 flow [2024-06-14 11:19:25,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:25,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 11:19:25,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 11:19:25,213 INFO L175 Difference]: Start difference. First operand has 172 places, 176 transitions, 1700 flow. Second operand 7 states and 165 transitions. [2024-06-14 11:19:25,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 210 transitions, 2444 flow [2024-06-14 11:19:25,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 210 transitions, 2378 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:25,342 INFO L231 Difference]: Finished difference. Result has 172 places, 185 transitions, 1868 flow [2024-06-14 11:19:25,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1634, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1868, PETRI_PLACES=172, PETRI_TRANSITIONS=185} [2024-06-14 11:19:25,343 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-14 11:19:25,343 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 185 transitions, 1868 flow [2024-06-14 11:19:25,343 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) [2024-06-14 11:19:25,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:25,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:25,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:19:25,344 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)] === [2024-06-14 11:19:25,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:25,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1099697034, now seen corresponding path program 2 times [2024-06-14 11:19:25,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:25,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441638557] [2024-06-14 11:19:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:25,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:25,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:25,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441638557] [2024-06-14 11:19:25,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441638557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:25,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:25,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:25,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883174852] [2024-06-14 11:19:25,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:25,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:25,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:25,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:25,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:25,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:25,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 185 transitions, 1868 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) [2024-06-14 11:19:25,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:25,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:25,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:25,811 INFO L124 PetriNetUnfolderBase]: 1396/2358 cut-off events. [2024-06-14 11:19:25,811 INFO L125 PetriNetUnfolderBase]: For 74951/74963 co-relation queries the response was YES. [2024-06-14 11:19:25,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13676 conditions, 2358 events. 1396/2358 cut-off events. For 74951/74963 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13411 event pairs, 351 based on Foata normal form. 13/2371 useless extension candidates. Maximal degree in co-relation 13588. Up to 2064 conditions per place. [2024-06-14 11:19:25,829 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 167 selfloop transitions, 38 changer transitions 0/211 dead transitions. [2024-06-14 11:19:25,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 211 transitions, 2401 flow [2024-06-14 11:19:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:25,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 11:19:25,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 11:19:25,830 INFO L175 Difference]: Start difference. First operand has 172 places, 185 transitions, 1868 flow. Second operand 7 states and 157 transitions. [2024-06-14 11:19:25,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 211 transitions, 2401 flow [2024-06-14 11:19:25,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 211 transitions, 2296 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:25,947 INFO L231 Difference]: Finished difference. Result has 177 places, 191 transitions, 1924 flow [2024-06-14 11:19:25,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1924, PETRI_PLACES=177, PETRI_TRANSITIONS=191} [2024-06-14 11:19:25,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-14 11:19:25,948 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 191 transitions, 1924 flow [2024-06-14 11:19:25,948 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) [2024-06-14 11:19:25,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:25,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:25,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:19:25,948 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)] === [2024-06-14 11:19:25,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:25,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1099697220, now seen corresponding path program 1 times [2024-06-14 11:19:25,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:25,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003971080] [2024-06-14 11:19:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:25,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:26,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:26,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003971080] [2024-06-14 11:19:26,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003971080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:26,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:26,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:26,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911052928] [2024-06-14 11:19:26,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:26,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:26,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:26,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:26,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:26,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:26,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 191 transitions, 1924 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) [2024-06-14 11:19:26,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:26,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:26,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:26,454 INFO L124 PetriNetUnfolderBase]: 1417/2391 cut-off events. [2024-06-14 11:19:26,454 INFO L125 PetriNetUnfolderBase]: For 80346/80358 co-relation queries the response was YES. [2024-06-14 11:19:26,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14095 conditions, 2391 events. 1417/2391 cut-off events. For 80346/80358 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13619 event pairs, 350 based on Foata normal form. 13/2404 useless extension candidates. Maximal degree in co-relation 14005. Up to 2052 conditions per place. [2024-06-14 11:19:26,472 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 156 selfloop transitions, 63 changer transitions 0/225 dead transitions. [2024-06-14 11:19:26,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 225 transitions, 2728 flow [2024-06-14 11:19:26,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:19:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:19:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 11:19:26,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-14 11:19:26,473 INFO L175 Difference]: Start difference. First operand has 177 places, 191 transitions, 1924 flow. Second operand 10 states and 213 transitions. [2024-06-14 11:19:26,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 225 transitions, 2728 flow [2024-06-14 11:19:26,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 225 transitions, 2638 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:26,597 INFO L231 Difference]: Finished difference. Result has 183 places, 200 transitions, 2110 flow [2024-06-14 11:19:26,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1834, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2110, PETRI_PLACES=183, PETRI_TRANSITIONS=200} [2024-06-14 11:19:26,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-14 11:19:26,598 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 200 transitions, 2110 flow [2024-06-14 11:19:26,598 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) [2024-06-14 11:19:26,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:26,598 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] [2024-06-14 11:19:26,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:19:26,599 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)] === [2024-06-14 11:19:26,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:26,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1277065890, now seen corresponding path program 2 times [2024-06-14 11:19:26,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:26,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941230923] [2024-06-14 11:19:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:26,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:26,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:26,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941230923] [2024-06-14 11:19:26,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941230923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:26,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:26,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:26,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183327208] [2024-06-14 11:19:26,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:26,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:26,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:26,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:26,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:26,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:26,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 200 transitions, 2110 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) [2024-06-14 11:19:26,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:26,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:26,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:27,073 INFO L124 PetriNetUnfolderBase]: 1448/2442 cut-off events. [2024-06-14 11:19:27,073 INFO L125 PetriNetUnfolderBase]: For 87044/87056 co-relation queries the response was YES. [2024-06-14 11:19:27,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14857 conditions, 2442 events. 1448/2442 cut-off events. For 87044/87056 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14003 event pairs, 350 based on Foata normal form. 13/2455 useless extension candidates. Maximal degree in co-relation 14766. Up to 2084 conditions per place. [2024-06-14 11:19:27,092 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 155 selfloop transitions, 75 changer transitions 0/236 dead transitions. [2024-06-14 11:19:27,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 236 transitions, 3017 flow [2024-06-14 11:19:27,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:19:27,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:19:27,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 11:19:27,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-14 11:19:27,096 INFO L175 Difference]: Start difference. First operand has 183 places, 200 transitions, 2110 flow. Second operand 9 states and 194 transitions. [2024-06-14 11:19:27,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 236 transitions, 3017 flow [2024-06-14 11:19:27,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 236 transitions, 2842 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:27,230 INFO L231 Difference]: Finished difference. Result has 187 places, 215 transitions, 2316 flow [2024-06-14 11:19:27,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2316, PETRI_PLACES=187, PETRI_TRANSITIONS=215} [2024-06-14 11:19:27,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-14 11:19:27,231 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 215 transitions, 2316 flow [2024-06-14 11:19:27,231 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) [2024-06-14 11:19:27,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:27,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:27,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:19:27,231 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)] === [2024-06-14 11:19:27,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:27,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1275639448, now seen corresponding path program 3 times [2024-06-14 11:19:27,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:27,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695347936] [2024-06-14 11:19:27,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:27,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:27,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:27,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695347936] [2024-06-14 11:19:27,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695347936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:27,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:27,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:27,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649279205] [2024-06-14 11:19:27,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:27,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:27,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:27,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:27,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:27,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:27,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 215 transitions, 2316 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) [2024-06-14 11:19:27,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:27,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:27,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:27,734 INFO L124 PetriNetUnfolderBase]: 1445/2436 cut-off events. [2024-06-14 11:19:27,734 INFO L125 PetriNetUnfolderBase]: For 89605/89617 co-relation queries the response was YES. [2024-06-14 11:19:27,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14893 conditions, 2436 events. 1445/2436 cut-off events. For 89605/89617 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 13939 event pairs, 350 based on Foata normal form. 13/2449 useless extension candidates. Maximal degree in co-relation 14800. Up to 2081 conditions per place. [2024-06-14 11:19:27,752 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 156 selfloop transitions, 76 changer transitions 0/238 dead transitions. [2024-06-14 11:19:27,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 238 transitions, 3010 flow [2024-06-14 11:19:27,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:19:27,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:19:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-14 11:19:27,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055432372505543 [2024-06-14 11:19:27,753 INFO L175 Difference]: Start difference. First operand has 187 places, 215 transitions, 2316 flow. Second operand 11 states and 228 transitions. [2024-06-14 11:19:27,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 238 transitions, 3010 flow [2024-06-14 11:19:27,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 238 transitions, 2897 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:27,921 INFO L231 Difference]: Finished difference. Result has 195 places, 215 transitions, 2361 flow [2024-06-14 11:19:27,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2203, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2361, PETRI_PLACES=195, PETRI_TRANSITIONS=215} [2024-06-14 11:19:27,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-14 11:19:27,921 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 215 transitions, 2361 flow [2024-06-14 11:19:27,921 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) [2024-06-14 11:19:27,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:27,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:27,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:19:27,922 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)] === [2024-06-14 11:19:27,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash -194331986, now seen corresponding path program 3 times [2024-06-14 11:19:27,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:27,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917770286] [2024-06-14 11:19:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:27,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:28,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:28,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917770286] [2024-06-14 11:19:28,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917770286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:28,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:28,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:28,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299908077] [2024-06-14 11:19:28,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:28,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:28,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:28,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:28,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:28,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:28,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 215 transitions, 2361 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) [2024-06-14 11:19:28,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:28,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:28,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:28,425 INFO L124 PetriNetUnfolderBase]: 1458/2458 cut-off events. [2024-06-14 11:19:28,426 INFO L125 PetriNetUnfolderBase]: For 94671/94683 co-relation queries the response was YES. [2024-06-14 11:19:28,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15153 conditions, 2458 events. 1458/2458 cut-off events. For 94671/94683 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14079 event pairs, 350 based on Foata normal form. 13/2471 useless extension candidates. Maximal degree in co-relation 15059. Up to 2141 conditions per place. [2024-06-14 11:19:28,443 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 184 selfloop transitions, 50 changer transitions 0/240 dead transitions. [2024-06-14 11:19:28,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 240 transitions, 3035 flow [2024-06-14 11:19:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 11:19:28,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 11:19:28,444 INFO L175 Difference]: Start difference. First operand has 195 places, 215 transitions, 2361 flow. Second operand 8 states and 172 transitions. [2024-06-14 11:19:28,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 240 transitions, 3035 flow [2024-06-14 11:19:28,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 240 transitions, 2861 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 11:19:28,615 INFO L231 Difference]: Finished difference. Result has 196 places, 221 transitions, 2383 flow [2024-06-14 11:19:28,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2383, PETRI_PLACES=196, PETRI_TRANSITIONS=221} [2024-06-14 11:19:28,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-14 11:19:28,616 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 221 transitions, 2383 flow [2024-06-14 11:19:28,616 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) [2024-06-14 11:19:28,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:28,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:28,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:19:28,616 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)] === [2024-06-14 11:19:28,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:28,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1412371866, now seen corresponding path program 4 times [2024-06-14 11:19:28,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:28,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874364762] [2024-06-14 11:19:28,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:28,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:28,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:28,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874364762] [2024-06-14 11:19:28,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874364762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:28,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:28,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:28,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119036621] [2024-06-14 11:19:28,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:28,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:28,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:28,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:28,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:28,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:28,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 221 transitions, 2383 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) [2024-06-14 11:19:28,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:28,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:28,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:29,094 INFO L124 PetriNetUnfolderBase]: 1486/2497 cut-off events. [2024-06-14 11:19:29,095 INFO L125 PetriNetUnfolderBase]: For 105906/105906 co-relation queries the response was YES. [2024-06-14 11:19:29,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15428 conditions, 2497 events. 1486/2497 cut-off events. For 105906/105906 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14306 event pairs, 342 based on Foata normal form. 8/2504 useless extension candidates. Maximal degree in co-relation 15332. Up to 2216 conditions per place. [2024-06-14 11:19:29,113 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 205 selfloop transitions, 27 changer transitions 0/238 dead transitions. [2024-06-14 11:19:29,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 238 transitions, 2928 flow [2024-06-14 11:19:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-14 11:19:29,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:19:29,114 INFO L175 Difference]: Start difference. First operand has 196 places, 221 transitions, 2383 flow. Second operand 6 states and 132 transitions. [2024-06-14 11:19:29,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 238 transitions, 2928 flow [2024-06-14 11:19:29,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 238 transitions, 2806 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:29,303 INFO L231 Difference]: Finished difference. Result has 197 places, 222 transitions, 2335 flow [2024-06-14 11:19:29,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2335, PETRI_PLACES=197, PETRI_TRANSITIONS=222} [2024-06-14 11:19:29,304 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-14 11:19:29,304 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 222 transitions, 2335 flow [2024-06-14 11:19:29,304 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) [2024-06-14 11:19:29,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:29,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:29,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:19:29,304 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)] === [2024-06-14 11:19:29,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:29,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1401647106, now seen corresponding path program 5 times [2024-06-14 11:19:29,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:29,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082226246] [2024-06-14 11:19:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:29,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:29,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:29,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082226246] [2024-06-14 11:19:29,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082226246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:29,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:29,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:29,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82454206] [2024-06-14 11:19:29,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:29,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:29,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:29,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:29,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:29,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:29,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 222 transitions, 2335 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) [2024-06-14 11:19:29,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:29,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:29,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:29,866 INFO L124 PetriNetUnfolderBase]: 1501/2529 cut-off events. [2024-06-14 11:19:29,867 INFO L125 PetriNetUnfolderBase]: For 107423/107431 co-relation queries the response was YES. [2024-06-14 11:19:29,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15516 conditions, 2529 events. 1501/2529 cut-off events. For 107423/107431 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14553 event pairs, 338 based on Foata normal form. 16/2545 useless extension candidates. Maximal degree in co-relation 15419. Up to 2209 conditions per place. [2024-06-14 11:19:29,888 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 211 selfloop transitions, 30 changer transitions 0/247 dead transitions. [2024-06-14 11:19:29,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 247 transitions, 2920 flow [2024-06-14 11:19:29,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 11:19:29,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-14 11:19:29,889 INFO L175 Difference]: Start difference. First operand has 197 places, 222 transitions, 2335 flow. Second operand 8 states and 171 transitions. [2024-06-14 11:19:29,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 247 transitions, 2920 flow [2024-06-14 11:19:30,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 247 transitions, 2863 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:30,110 INFO L231 Difference]: Finished difference. Result has 201 places, 223 transitions, 2363 flow [2024-06-14 11:19:30,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2363, PETRI_PLACES=201, PETRI_TRANSITIONS=223} [2024-06-14 11:19:30,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-14 11:19:30,110 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 223 transitions, 2363 flow [2024-06-14 11:19:30,110 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) [2024-06-14 11:19:30,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:30,110 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] [2024-06-14 11:19:30,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:19:30,111 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)] === [2024-06-14 11:19:30,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:30,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1401320676, now seen corresponding path program 6 times [2024-06-14 11:19:30,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:30,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163896419] [2024-06-14 11:19:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:30,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:30,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:30,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163896419] [2024-06-14 11:19:30,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163896419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:30,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:30,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:30,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725189078] [2024-06-14 11:19:30,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:30,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:30,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:30,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:30,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:30,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 223 transitions, 2363 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) [2024-06-14 11:19:30,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:30,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:30,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:30,655 INFO L124 PetriNetUnfolderBase]: 1488/2510 cut-off events. [2024-06-14 11:19:30,655 INFO L125 PetriNetUnfolderBase]: For 102625/102633 co-relation queries the response was YES. [2024-06-14 11:19:30,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15244 conditions, 2510 events. 1488/2510 cut-off events. For 102625/102633 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14420 event pairs, 246 based on Foata normal form. 14/2524 useless extension candidates. Maximal degree in co-relation 15146. Up to 2036 conditions per place. [2024-06-14 11:19:30,673 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 206 selfloop transitions, 41 changer transitions 0/253 dead transitions. [2024-06-14 11:19:30,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 253 transitions, 2971 flow [2024-06-14 11:19:30,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 11:19:30,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 11:19:30,675 INFO L175 Difference]: Start difference. First operand has 201 places, 223 transitions, 2363 flow. Second operand 8 states and 177 transitions. [2024-06-14 11:19:30,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 253 transitions, 2971 flow [2024-06-14 11:19:30,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 253 transitions, 2903 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 11:19:30,860 INFO L231 Difference]: Finished difference. Result has 203 places, 223 transitions, 2385 flow [2024-06-14 11:19:30,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2385, PETRI_PLACES=203, PETRI_TRANSITIONS=223} [2024-06-14 11:19:30,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-14 11:19:30,861 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 223 transitions, 2385 flow [2024-06-14 11:19:30,861 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) [2024-06-14 11:19:30,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:30,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:30,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:19:30,861 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)] === [2024-06-14 11:19:30,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:30,862 INFO L85 PathProgramCache]: Analyzing trace with hash 378636038, now seen corresponding path program 4 times [2024-06-14 11:19:30,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:30,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014045218] [2024-06-14 11:19:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:30,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:31,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:31,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014045218] [2024-06-14 11:19:31,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014045218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:31,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:31,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:31,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310601900] [2024-06-14 11:19:31,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:31,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:31,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:31,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:31,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:31,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:31,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 223 transitions, 2385 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) [2024-06-14 11:19:31,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:31,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:31,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:31,426 INFO L124 PetriNetUnfolderBase]: 1501/2531 cut-off events. [2024-06-14 11:19:31,426 INFO L125 PetriNetUnfolderBase]: For 98758/98766 co-relation queries the response was YES. [2024-06-14 11:19:31,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15484 conditions, 2531 events. 1501/2531 cut-off events. For 98758/98766 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14606 event pairs, 364 based on Foata normal form. 9/2539 useless extension candidates. Maximal degree in co-relation 15385. Up to 2161 conditions per place. [2024-06-14 11:19:31,443 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 189 selfloop transitions, 55 changer transitions 0/250 dead transitions. [2024-06-14 11:19:31,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 250 transitions, 3201 flow [2024-06-14 11:19:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:31,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:19:31,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:19:31,444 INFO L175 Difference]: Start difference. First operand has 203 places, 223 transitions, 2385 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:19:31,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 250 transitions, 3201 flow [2024-06-14 11:19:31,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 250 transitions, 3105 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:31,638 INFO L231 Difference]: Finished difference. Result has 202 places, 229 transitions, 2497 flow [2024-06-14 11:19:31,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2497, PETRI_PLACES=202, PETRI_TRANSITIONS=229} [2024-06-14 11:19:31,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-14 11:19:31,638 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 229 transitions, 2497 flow [2024-06-14 11:19:31,638 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) [2024-06-14 11:19:31,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:31,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:31,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:19:31,639 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)] === [2024-06-14 11:19:31,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:31,639 INFO L85 PathProgramCache]: Analyzing trace with hash -853945054, now seen corresponding path program 4 times [2024-06-14 11:19:31,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:31,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121932389] [2024-06-14 11:19:31,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:31,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:31,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:31,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121932389] [2024-06-14 11:19:31,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121932389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:31,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:31,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:31,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226388440] [2024-06-14 11:19:31,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:31,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:31,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:31,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:31,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:31,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:31,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 229 transitions, 2497 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) [2024-06-14 11:19:31,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:31,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:31,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:32,164 INFO L124 PetriNetUnfolderBase]: 1498/2530 cut-off events. [2024-06-14 11:19:32,164 INFO L125 PetriNetUnfolderBase]: For 93917/93929 co-relation queries the response was YES. [2024-06-14 11:19:32,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15270 conditions, 2530 events. 1498/2530 cut-off events. For 93917/93929 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14677 event pairs, 352 based on Foata normal form. 13/2543 useless extension candidates. Maximal degree in co-relation 15171. Up to 2199 conditions per place. [2024-06-14 11:19:32,183 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 187 selfloop transitions, 54 changer transitions 0/247 dead transitions. [2024-06-14 11:19:32,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 247 transitions, 3117 flow [2024-06-14 11:19:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:32,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 11:19:32,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-14 11:19:32,184 INFO L175 Difference]: Start difference. First operand has 202 places, 229 transitions, 2497 flow. Second operand 7 states and 159 transitions. [2024-06-14 11:19:32,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 247 transitions, 3117 flow [2024-06-14 11:19:32,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 247 transitions, 2947 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:32,373 INFO L231 Difference]: Finished difference. Result has 206 places, 229 transitions, 2445 flow [2024-06-14 11:19:32,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2445, PETRI_PLACES=206, PETRI_TRANSITIONS=229} [2024-06-14 11:19:32,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-14 11:19:32,373 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 229 transitions, 2445 flow [2024-06-14 11:19:32,374 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) [2024-06-14 11:19:32,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:32,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:32,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:19:32,374 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)] === [2024-06-14 11:19:32,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:32,374 INFO L85 PathProgramCache]: Analyzing trace with hash -853945240, now seen corresponding path program 5 times [2024-06-14 11:19:32,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:32,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143048803] [2024-06-14 11:19:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:32,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:32,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:32,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143048803] [2024-06-14 11:19:32,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143048803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:32,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:32,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:32,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304725289] [2024-06-14 11:19:32,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:32,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:32,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:32,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:32,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:32,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:32,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 229 transitions, 2445 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) [2024-06-14 11:19:32,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:32,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:32,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:32,862 INFO L124 PetriNetUnfolderBase]: 1495/2524 cut-off events. [2024-06-14 11:19:32,862 INFO L125 PetriNetUnfolderBase]: For 95992/96004 co-relation queries the response was YES. [2024-06-14 11:19:32,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15201 conditions, 2524 events. 1495/2524 cut-off events. For 95992/96004 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 14574 event pairs, 352 based on Foata normal form. 13/2537 useless extension candidates. Maximal degree in co-relation 15101. Up to 2226 conditions per place. [2024-06-14 11:19:32,923 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 205 selfloop transitions, 34 changer transitions 0/245 dead transitions. [2024-06-14 11:19:32,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 245 transitions, 2963 flow [2024-06-14 11:19:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:32,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 11:19:32,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 11:19:32,924 INFO L175 Difference]: Start difference. First operand has 206 places, 229 transitions, 2445 flow. Second operand 6 states and 137 transitions. [2024-06-14 11:19:32,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 245 transitions, 2963 flow [2024-06-14 11:19:33,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 245 transitions, 2860 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:33,105 INFO L231 Difference]: Finished difference. Result has 207 places, 229 transitions, 2416 flow [2024-06-14 11:19:33,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2416, PETRI_PLACES=207, PETRI_TRANSITIONS=229} [2024-06-14 11:19:33,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-14 11:19:33,106 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 229 transitions, 2416 flow [2024-06-14 11:19:33,106 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) [2024-06-14 11:19:33,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:33,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:33,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:19:33,107 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)] === [2024-06-14 11:19:33,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash -848702830, now seen corresponding path program 6 times [2024-06-14 11:19:33,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:33,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243073597] [2024-06-14 11:19:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:33,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:33,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:33,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243073597] [2024-06-14 11:19:33,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243073597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:33,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:33,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:33,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078113097] [2024-06-14 11:19:33,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:33,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:33,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:33,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:33,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:33,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:33,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 229 transitions, 2416 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) [2024-06-14 11:19:33,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:33,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:33,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:33,586 INFO L124 PetriNetUnfolderBase]: 1500/2535 cut-off events. [2024-06-14 11:19:33,586 INFO L125 PetriNetUnfolderBase]: For 99756/99768 co-relation queries the response was YES. [2024-06-14 11:19:33,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15292 conditions, 2535 events. 1500/2535 cut-off events. For 99756/99768 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 14684 event pairs, 352 based on Foata normal form. 13/2548 useless extension candidates. Maximal degree in co-relation 15191. Up to 2160 conditions per place. [2024-06-14 11:19:33,606 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 193 selfloop transitions, 62 changer transitions 0/261 dead transitions. [2024-06-14 11:19:33,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 261 transitions, 3230 flow [2024-06-14 11:19:33,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:33,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 11:19:33,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-14 11:19:33,608 INFO L175 Difference]: Start difference. First operand has 207 places, 229 transitions, 2416 flow. Second operand 8 states and 185 transitions. [2024-06-14 11:19:33,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 261 transitions, 3230 flow [2024-06-14 11:19:33,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 261 transitions, 3154 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:33,811 INFO L231 Difference]: Finished difference. Result has 210 places, 232 transitions, 2506 flow [2024-06-14 11:19:33,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2506, PETRI_PLACES=210, PETRI_TRANSITIONS=232} [2024-06-14 11:19:33,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-14 11:19:33,811 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 232 transitions, 2506 flow [2024-06-14 11:19:33,811 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) [2024-06-14 11:19:33,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:33,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:33,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:19:33,811 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)] === [2024-06-14 11:19:33,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:33,812 INFO L85 PathProgramCache]: Analyzing trace with hash -848404300, now seen corresponding path program 7 times [2024-06-14 11:19:33,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:33,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193851141] [2024-06-14 11:19:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:33,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:33,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:33,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193851141] [2024-06-14 11:19:33,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193851141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:33,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:33,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:33,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274659601] [2024-06-14 11:19:33,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:33,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:33,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:33,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:33,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:33,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:33,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 232 transitions, 2506 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) [2024-06-14 11:19:33,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:33,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:33,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:34,308 INFO L124 PetriNetUnfolderBase]: 1505/2542 cut-off events. [2024-06-14 11:19:34,308 INFO L125 PetriNetUnfolderBase]: For 103644/103656 co-relation queries the response was YES. [2024-06-14 11:19:34,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15504 conditions, 2542 events. 1505/2542 cut-off events. For 103644/103656 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14740 event pairs, 352 based on Foata normal form. 13/2555 useless extension candidates. Maximal degree in co-relation 15402. Up to 2166 conditions per place. [2024-06-14 11:19:34,328 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 187 selfloop transitions, 68 changer transitions 0/261 dead transitions. [2024-06-14 11:19:34,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 261 transitions, 3222 flow [2024-06-14 11:19:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:19:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:19:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 11:19:34,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:19:34,329 INFO L175 Difference]: Start difference. First operand has 210 places, 232 transitions, 2506 flow. Second operand 9 states and 198 transitions. [2024-06-14 11:19:34,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 261 transitions, 3222 flow [2024-06-14 11:19:34,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 261 transitions, 3034 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 11:19:34,520 INFO L231 Difference]: Finished difference. Result has 213 places, 235 transitions, 2502 flow [2024-06-14 11:19:34,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2502, PETRI_PLACES=213, PETRI_TRANSITIONS=235} [2024-06-14 11:19:34,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-14 11:19:34,521 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 235 transitions, 2502 flow [2024-06-14 11:19:34,521 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) [2024-06-14 11:19:34,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:34,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:34,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:19:34,522 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)] === [2024-06-14 11:19:34,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash -848403928, now seen corresponding path program 1 times [2024-06-14 11:19:34,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:34,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360587756] [2024-06-14 11:19:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:34,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:34,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:34,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360587756] [2024-06-14 11:19:34,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360587756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:34,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:34,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:34,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183245390] [2024-06-14 11:19:34,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:34,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:34,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:34,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:34,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:34,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 235 transitions, 2502 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) [2024-06-14 11:19:34,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:34,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:34,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:35,021 INFO L124 PetriNetUnfolderBase]: 1518/2562 cut-off events. [2024-06-14 11:19:35,021 INFO L125 PetriNetUnfolderBase]: For 108506/108518 co-relation queries the response was YES. [2024-06-14 11:19:35,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15726 conditions, 2562 events. 1518/2562 cut-off events. For 108506/108518 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14862 event pairs, 351 based on Foata normal form. 13/2575 useless extension candidates. Maximal degree in co-relation 15623. Up to 2224 conditions per place. [2024-06-14 11:19:35,041 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 198 selfloop transitions, 53 changer transitions 0/257 dead transitions. [2024-06-14 11:19:35,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 257 transitions, 3240 flow [2024-06-14 11:19:35,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 11:19:35,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-14 11:19:35,042 INFO L175 Difference]: Start difference. First operand has 213 places, 235 transitions, 2502 flow. Second operand 8 states and 173 transitions. [2024-06-14 11:19:35,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 257 transitions, 3240 flow [2024-06-14 11:19:35,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 257 transitions, 3112 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:19:35,274 INFO L231 Difference]: Finished difference. Result has 215 places, 241 transitions, 2592 flow [2024-06-14 11:19:35,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2592, PETRI_PLACES=215, PETRI_TRANSITIONS=241} [2024-06-14 11:19:35,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-14 11:19:35,275 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 241 transitions, 2592 flow [2024-06-14 11:19:35,275 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) [2024-06-14 11:19:35,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:35,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:35,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:19:35,275 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)] === [2024-06-14 11:19:35,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:35,275 INFO L85 PathProgramCache]: Analyzing trace with hash 500378792, now seen corresponding path program 2 times [2024-06-14 11:19:35,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:35,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209803494] [2024-06-14 11:19:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:35,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:35,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:35,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209803494] [2024-06-14 11:19:35,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209803494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:35,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:35,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:35,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728947475] [2024-06-14 11:19:35,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:35,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:35,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:35,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:35,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:35,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:35,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 241 transitions, 2592 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) [2024-06-14 11:19:35,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:35,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:35,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:35,806 INFO L124 PetriNetUnfolderBase]: 1547/2607 cut-off events. [2024-06-14 11:19:35,806 INFO L125 PetriNetUnfolderBase]: For 115029/115041 co-relation queries the response was YES. [2024-06-14 11:19:35,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16371 conditions, 2607 events. 1547/2607 cut-off events. For 115029/115041 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 15136 event pairs, 351 based on Foata normal form. 13/2620 useless extension candidates. Maximal degree in co-relation 16267. Up to 2285 conditions per place. [2024-06-14 11:19:35,830 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 215 selfloop transitions, 46 changer transitions 0/267 dead transitions. [2024-06-14 11:19:35,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 267 transitions, 3444 flow [2024-06-14 11:19:35,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 11:19:35,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:19:35,831 INFO L175 Difference]: Start difference. First operand has 215 places, 241 transitions, 2592 flow. Second operand 6 states and 138 transitions. [2024-06-14 11:19:35,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 267 transitions, 3444 flow [2024-06-14 11:19:36,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 267 transitions, 3301 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:36,058 INFO L231 Difference]: Finished difference. Result has 217 places, 253 transitions, 2786 flow [2024-06-14 11:19:36,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2786, PETRI_PLACES=217, PETRI_TRANSITIONS=253} [2024-06-14 11:19:36,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-14 11:19:36,059 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 253 transitions, 2786 flow [2024-06-14 11:19:36,059 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) [2024-06-14 11:19:36,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:36,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:36,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:19:36,059 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)] === [2024-06-14 11:19:36,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:36,065 INFO L85 PathProgramCache]: Analyzing trace with hash 500373026, now seen corresponding path program 5 times [2024-06-14 11:19:36,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:36,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605452428] [2024-06-14 11:19:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:36,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:36,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:36,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605452428] [2024-06-14 11:19:36,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605452428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:36,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:36,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:36,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903738884] [2024-06-14 11:19:36,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:36,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:36,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:36,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:36,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:36,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:36,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 253 transitions, 2786 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) [2024-06-14 11:19:36,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:36,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:36,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:36,601 INFO L124 PetriNetUnfolderBase]: 1552/2616 cut-off events. [2024-06-14 11:19:36,601 INFO L125 PetriNetUnfolderBase]: For 115238/115252 co-relation queries the response was YES. [2024-06-14 11:19:36,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16507 conditions, 2616 events. 1552/2616 cut-off events. For 115238/115252 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15198 event pairs, 351 based on Foata normal form. 15/2631 useless extension candidates. Maximal degree in co-relation 16401. Up to 2274 conditions per place. [2024-06-14 11:19:36,622 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 210 selfloop transitions, 57 changer transitions 0/273 dead transitions. [2024-06-14 11:19:36,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 273 transitions, 3512 flow [2024-06-14 11:19:36,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 11:19:36,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 11:19:36,623 INFO L175 Difference]: Start difference. First operand has 217 places, 253 transitions, 2786 flow. Second operand 6 states and 141 transitions. [2024-06-14 11:19:36,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 273 transitions, 3512 flow [2024-06-14 11:19:36,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 273 transitions, 3451 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:36,833 INFO L231 Difference]: Finished difference. Result has 220 places, 256 transitions, 2905 flow [2024-06-14 11:19:36,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2727, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2905, PETRI_PLACES=220, PETRI_TRANSITIONS=256} [2024-06-14 11:19:36,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-14 11:19:36,833 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 256 transitions, 2905 flow [2024-06-14 11:19:36,833 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) [2024-06-14 11:19:36,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:36,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:36,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:19:36,834 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)] === [2024-06-14 11:19:36,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:36,834 INFO L85 PathProgramCache]: Analyzing trace with hash 500372840, now seen corresponding path program 8 times [2024-06-14 11:19:36,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:36,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508934079] [2024-06-14 11:19:36,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:36,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:36,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:36,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:36,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508934079] [2024-06-14 11:19:36,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508934079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:36,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:36,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:36,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857679404] [2024-06-14 11:19:36,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:36,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:36,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:36,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:36,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:37,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:37,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 256 transitions, 2905 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) [2024-06-14 11:19:37,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:37,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:37,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:37,407 INFO L124 PetriNetUnfolderBase]: 1549/2612 cut-off events. [2024-06-14 11:19:37,407 INFO L125 PetriNetUnfolderBase]: For 114104/114118 co-relation queries the response was YES. [2024-06-14 11:19:37,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16563 conditions, 2612 events. 1549/2612 cut-off events. For 114104/114118 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15151 event pairs, 351 based on Foata normal form. 15/2627 useless extension candidates. Maximal degree in co-relation 16456. Up to 2234 conditions per place. [2024-06-14 11:19:37,429 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 217 selfloop transitions, 60 changer transitions 0/283 dead transitions. [2024-06-14 11:19:37,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 283 transitions, 3631 flow [2024-06-14 11:19:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:19:37,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 11:19:37,432 INFO L175 Difference]: Start difference. First operand has 220 places, 256 transitions, 2905 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:19:37,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 283 transitions, 3631 flow [2024-06-14 11:19:37,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 283 transitions, 3501 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:37,699 INFO L231 Difference]: Finished difference. Result has 222 places, 256 transitions, 2913 flow [2024-06-14 11:19:37,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2779, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2913, PETRI_PLACES=222, PETRI_TRANSITIONS=256} [2024-06-14 11:19:37,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-14 11:19:37,700 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 256 transitions, 2913 flow [2024-06-14 11:19:37,700 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) [2024-06-14 11:19:37,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:37,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:37,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:19:37,700 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)] === [2024-06-14 11:19:37,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash 500378420, now seen corresponding path program 9 times [2024-06-14 11:19:37,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:37,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843003554] [2024-06-14 11:19:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:37,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:37,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:37,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843003554] [2024-06-14 11:19:37,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843003554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:37,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:37,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:37,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242285382] [2024-06-14 11:19:37,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:37,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:37,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:37,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:37,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:37,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:37,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 256 transitions, 2913 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) [2024-06-14 11:19:37,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:37,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:37,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:38,250 INFO L124 PetriNetUnfolderBase]: 1546/2608 cut-off events. [2024-06-14 11:19:38,251 INFO L125 PetriNetUnfolderBase]: For 109335/109349 co-relation queries the response was YES. [2024-06-14 11:19:38,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16440 conditions, 2608 events. 1546/2608 cut-off events. For 109335/109349 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15161 event pairs, 351 based on Foata normal form. 15/2623 useless extension candidates. Maximal degree in co-relation 16334. Up to 2231 conditions per place. [2024-06-14 11:19:38,272 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 212 selfloop transitions, 60 changer transitions 0/278 dead transitions. [2024-06-14 11:19:38,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 278 transitions, 3513 flow [2024-06-14 11:19:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:38,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 11:19:38,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 11:19:38,273 INFO L175 Difference]: Start difference. First operand has 222 places, 256 transitions, 2913 flow. Second operand 6 states and 146 transitions. [2024-06-14 11:19:38,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 278 transitions, 3513 flow [2024-06-14 11:19:38,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 278 transitions, 3343 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 11:19:38,504 INFO L231 Difference]: Finished difference. Result has 219 places, 256 transitions, 2875 flow [2024-06-14 11:19:38,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2743, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2875, PETRI_PLACES=219, PETRI_TRANSITIONS=256} [2024-06-14 11:19:38,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-14 11:19:38,504 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 256 transitions, 2875 flow [2024-06-14 11:19:38,504 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) [2024-06-14 11:19:38,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:38,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:38,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:19:38,505 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)] === [2024-06-14 11:19:38,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:38,505 INFO L85 PathProgramCache]: Analyzing trace with hash 500384372, now seen corresponding path program 3 times [2024-06-14 11:19:38,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:38,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113541646] [2024-06-14 11:19:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:38,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:38,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:38,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113541646] [2024-06-14 11:19:38,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113541646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:38,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:38,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:38,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964792126] [2024-06-14 11:19:38,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:38,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:38,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:38,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:38,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:38,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:38,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 256 transitions, 2875 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) [2024-06-14 11:19:38,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:38,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:38,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:39,033 INFO L124 PetriNetUnfolderBase]: 1543/2604 cut-off events. [2024-06-14 11:19:39,033 INFO L125 PetriNetUnfolderBase]: For 104319/104333 co-relation queries the response was YES. [2024-06-14 11:19:39,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16247 conditions, 2604 events. 1543/2604 cut-off events. For 104319/104333 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15127 event pairs, 351 based on Foata normal form. 15/2619 useless extension candidates. Maximal degree in co-relation 16142. Up to 2281 conditions per place. [2024-06-14 11:19:39,054 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 218 selfloop transitions, 46 changer transitions 0/270 dead transitions. [2024-06-14 11:19:39,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 270 transitions, 3437 flow [2024-06-14 11:19:39,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:39,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 11:19:39,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:19:39,055 INFO L175 Difference]: Start difference. First operand has 219 places, 256 transitions, 2875 flow. Second operand 7 states and 154 transitions. [2024-06-14 11:19:39,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 270 transitions, 3437 flow [2024-06-14 11:19:39,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 270 transitions, 3290 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 11:19:39,255 INFO L231 Difference]: Finished difference. Result has 220 places, 256 transitions, 2830 flow [2024-06-14 11:19:39,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2728, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2830, PETRI_PLACES=220, PETRI_TRANSITIONS=256} [2024-06-14 11:19:39,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-14 11:19:39,256 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 256 transitions, 2830 flow [2024-06-14 11:19:39,256 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) [2024-06-14 11:19:39,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:39,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:39,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:19:39,256 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)] === [2024-06-14 11:19:39,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:39,256 INFO L85 PathProgramCache]: Analyzing trace with hash 500384186, now seen corresponding path program 6 times [2024-06-14 11:19:39,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:39,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541189566] [2024-06-14 11:19:39,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:39,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:39,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:39,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541189566] [2024-06-14 11:19:39,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541189566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:39,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:39,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:39,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316337449] [2024-06-14 11:19:39,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:39,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:39,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:39,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:39,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:39,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:39,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 256 transitions, 2830 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) [2024-06-14 11:19:39,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:39,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:39,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:39,754 INFO L124 PetriNetUnfolderBase]: 1540/2600 cut-off events. [2024-06-14 11:19:39,755 INFO L125 PetriNetUnfolderBase]: For 102651/102665 co-relation queries the response was YES. [2024-06-14 11:19:39,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16096 conditions, 2600 events. 1540/2600 cut-off events. For 102651/102665 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15106 event pairs, 351 based on Foata normal form. 15/2615 useless extension candidates. Maximal degree in co-relation 15991. Up to 2259 conditions per place. [2024-06-14 11:19:39,774 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 210 selfloop transitions, 57 changer transitions 0/273 dead transitions. [2024-06-14 11:19:39,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 273 transitions, 3406 flow [2024-06-14 11:19:39,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:39,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:39,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 11:19:39,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 11:19:39,775 INFO L175 Difference]: Start difference. First operand has 220 places, 256 transitions, 2830 flow. Second operand 7 states and 157 transitions. [2024-06-14 11:19:39,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 273 transitions, 3406 flow [2024-06-14 11:19:39,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 273 transitions, 3280 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 11:19:39,981 INFO L231 Difference]: Finished difference. Result has 221 places, 256 transitions, 2828 flow [2024-06-14 11:19:39,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2704, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2828, PETRI_PLACES=221, PETRI_TRANSITIONS=256} [2024-06-14 11:19:39,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-14 11:19:39,981 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 256 transitions, 2828 flow [2024-06-14 11:19:39,981 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) [2024-06-14 11:19:39,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:39,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:39,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:19:39,982 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)] === [2024-06-14 11:19:39,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:39,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1401650082, now seen corresponding path program 7 times [2024-06-14 11:19:39,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:39,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707648903] [2024-06-14 11:19:39,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:39,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:40,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:40,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707648903] [2024-06-14 11:19:40,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707648903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:40,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:40,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:40,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081332354] [2024-06-14 11:19:40,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:40,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:40,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:40,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:40,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:40,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:40,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 256 transitions, 2828 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) [2024-06-14 11:19:40,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:40,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:40,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:40,485 INFO L124 PetriNetUnfolderBase]: 1553/2620 cut-off events. [2024-06-14 11:19:40,485 INFO L125 PetriNetUnfolderBase]: For 104108/104122 co-relation queries the response was YES. [2024-06-14 11:19:40,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16260 conditions, 2620 events. 1553/2620 cut-off events. For 104108/104122 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15216 event pairs, 351 based on Foata normal form. 15/2635 useless extension candidates. Maximal degree in co-relation 16155. Up to 2239 conditions per place. [2024-06-14 11:19:40,507 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 194 selfloop transitions, 82 changer transitions 0/282 dead transitions. [2024-06-14 11:19:40,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 282 transitions, 3706 flow [2024-06-14 11:19:40,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:40,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:40,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 11:19:40,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:19:40,509 INFO L175 Difference]: Start difference. First operand has 221 places, 256 transitions, 2828 flow. Second operand 8 states and 176 transitions. [2024-06-14 11:19:40,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 282 transitions, 3706 flow [2024-06-14 11:19:40,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 282 transitions, 3538 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 11:19:40,735 INFO L231 Difference]: Finished difference. Result has 221 places, 262 transitions, 2916 flow [2024-06-14 11:19:40,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2664, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2916, PETRI_PLACES=221, PETRI_TRANSITIONS=262} [2024-06-14 11:19:40,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-14 11:19:40,736 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 262 transitions, 2916 flow [2024-06-14 11:19:40,736 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) [2024-06-14 11:19:40,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:40,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:40,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:19:40,736 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)] === [2024-06-14 11:19:40,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1401412932, now seen corresponding path program 8 times [2024-06-14 11:19:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:40,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380927621] [2024-06-14 11:19:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:40,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:40,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:40,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380927621] [2024-06-14 11:19:40,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380927621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:40,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:40,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:40,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745170813] [2024-06-14 11:19:40,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:40,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:40,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:40,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:40,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:40,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:40,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 262 transitions, 2916 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) [2024-06-14 11:19:40,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:40,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:40,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:41,322 INFO L124 PetriNetUnfolderBase]: 1550/2616 cut-off events. [2024-06-14 11:19:41,322 INFO L125 PetriNetUnfolderBase]: For 102730/102744 co-relation queries the response was YES. [2024-06-14 11:19:41,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16220 conditions, 2616 events. 1550/2616 cut-off events. For 102730/102744 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15238 event pairs, 351 based on Foata normal form. 15/2631 useless extension candidates. Maximal degree in co-relation 16115. Up to 2236 conditions per place. [2024-06-14 11:19:41,344 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 193 selfloop transitions, 86 changer transitions 0/285 dead transitions. [2024-06-14 11:19:41,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 285 transitions, 3630 flow [2024-06-14 11:19:41,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:19:41,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:19:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 11:19:41,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 11:19:41,345 INFO L175 Difference]: Start difference. First operand has 221 places, 262 transitions, 2916 flow. Second operand 9 states and 195 transitions. [2024-06-14 11:19:41,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 285 transitions, 3630 flow [2024-06-14 11:19:41,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 285 transitions, 3456 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:41,578 INFO L231 Difference]: Finished difference. Result has 225 places, 262 transitions, 2930 flow [2024-06-14 11:19:41,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2930, PETRI_PLACES=225, PETRI_TRANSITIONS=262} [2024-06-14 11:19:41,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-14 11:19:41,579 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 262 transitions, 2930 flow [2024-06-14 11:19:41,579 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) [2024-06-14 11:19:41,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:41,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:41,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:19:41,579 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)] === [2024-06-14 11:19:41,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:41,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1412374842, now seen corresponding path program 9 times [2024-06-14 11:19:41,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:41,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112760208] [2024-06-14 11:19:41,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:41,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:41,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:41,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112760208] [2024-06-14 11:19:41,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112760208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:41,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:41,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:41,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95923229] [2024-06-14 11:19:41,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:41,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:41,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:41,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:41,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:41,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:41,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 262 transitions, 2930 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) [2024-06-14 11:19:41,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:41,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:41,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:42,094 INFO L124 PetriNetUnfolderBase]: 1547/2610 cut-off events. [2024-06-14 11:19:42,094 INFO L125 PetriNetUnfolderBase]: For 101625/101631 co-relation queries the response was YES. [2024-06-14 11:19:42,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16139 conditions, 2610 events. 1547/2610 cut-off events. For 101625/101631 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15195 event pairs, 373 based on Foata normal form. 7/2616 useless extension candidates. Maximal degree in co-relation 16034. Up to 2233 conditions per place. [2024-06-14 11:19:42,116 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 189 selfloop transitions, 77 changer transitions 0/272 dead transitions. [2024-06-14 11:19:42,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 272 transitions, 3486 flow [2024-06-14 11:19:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 11:19:42,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-14 11:19:42,117 INFO L175 Difference]: Start difference. First operand has 225 places, 262 transitions, 2930 flow. Second operand 6 states and 133 transitions. [2024-06-14 11:19:42,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 272 transitions, 3486 flow [2024-06-14 11:19:42,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 272 transitions, 3274 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 11:19:42,360 INFO L231 Difference]: Finished difference. Result has 222 places, 262 transitions, 2878 flow [2024-06-14 11:19:42,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2718, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2878, PETRI_PLACES=222, PETRI_TRANSITIONS=262} [2024-06-14 11:19:42,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-14 11:19:42,361 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 262 transitions, 2878 flow [2024-06-14 11:19:42,361 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) [2024-06-14 11:19:42,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:42,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:42,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:19:42,361 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)] === [2024-06-14 11:19:42,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:42,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1401412746, now seen corresponding path program 10 times [2024-06-14 11:19:42,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:42,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785300261] [2024-06-14 11:19:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:42,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:42,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:42,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785300261] [2024-06-14 11:19:42,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785300261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:42,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:42,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:42,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318339521] [2024-06-14 11:19:42,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:42,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:42,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:42,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:42,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:42,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:42,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 262 transitions, 2878 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) [2024-06-14 11:19:42,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:42,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:42,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:42,869 INFO L124 PetriNetUnfolderBase]: 1544/2608 cut-off events. [2024-06-14 11:19:42,869 INFO L125 PetriNetUnfolderBase]: For 96488/96502 co-relation queries the response was YES. [2024-06-14 11:19:42,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15933 conditions, 2608 events. 1544/2608 cut-off events. For 96488/96502 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15166 event pairs, 351 based on Foata normal form. 15/2623 useless extension candidates. Maximal degree in co-relation 15829. Up to 2193 conditions per place. [2024-06-14 11:19:42,891 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 203 selfloop transitions, 83 changer transitions 0/292 dead transitions. [2024-06-14 11:19:42,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 292 transitions, 3526 flow [2024-06-14 11:19:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 11:19:42,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 11:19:42,892 INFO L175 Difference]: Start difference. First operand has 222 places, 262 transitions, 2878 flow. Second operand 8 states and 187 transitions. [2024-06-14 11:19:42,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 292 transitions, 3526 flow [2024-06-14 11:19:43,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 292 transitions, 3342 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:19:43,107 INFO L231 Difference]: Finished difference. Result has 224 places, 262 transitions, 2878 flow [2024-06-14 11:19:43,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2694, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2878, PETRI_PLACES=224, PETRI_TRANSITIONS=262} [2024-06-14 11:19:43,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-14 11:19:43,108 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 262 transitions, 2878 flow [2024-06-14 11:19:43,108 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) [2024-06-14 11:19:43,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:43,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:43,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:19:43,108 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)] === [2024-06-14 11:19:43,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:43,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1412771580, now seen corresponding path program 1 times [2024-06-14 11:19:43,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:43,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324387146] [2024-06-14 11:19:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:43,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:43,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:43,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324387146] [2024-06-14 11:19:43,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324387146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:43,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:43,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:43,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925176549] [2024-06-14 11:19:43,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:43,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:43,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:43,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:43,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:43,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:43,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 262 transitions, 2878 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) [2024-06-14 11:19:43,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:43,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:43,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:43,660 INFO L124 PetriNetUnfolderBase]: 1564/2635 cut-off events. [2024-06-14 11:19:43,660 INFO L125 PetriNetUnfolderBase]: For 106505/106505 co-relation queries the response was YES. [2024-06-14 11:19:43,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16206 conditions, 2635 events. 1564/2635 cut-off events. For 106505/106505 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 15272 event pairs, 335 based on Foata normal form. 6/2640 useless extension candidates. Maximal degree in co-relation 16101. Up to 2234 conditions per place. [2024-06-14 11:19:43,682 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 247 selfloop transitions, 32 changer transitions 0/285 dead transitions. [2024-06-14 11:19:43,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 285 transitions, 3558 flow [2024-06-14 11:19:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 11:19:43,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 11:19:43,683 INFO L175 Difference]: Start difference. First operand has 224 places, 262 transitions, 2878 flow. Second operand 6 states and 135 transitions. [2024-06-14 11:19:43,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 285 transitions, 3558 flow [2024-06-14 11:19:43,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 285 transitions, 3382 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 11:19:43,889 INFO L231 Difference]: Finished difference. Result has 223 places, 266 transitions, 2822 flow [2024-06-14 11:19:43,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2822, PETRI_PLACES=223, PETRI_TRANSITIONS=266} [2024-06-14 11:19:43,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-14 11:19:43,890 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 266 transitions, 2822 flow [2024-06-14 11:19:43,890 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) [2024-06-14 11:19:43,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:43,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:43,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:19:43,890 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)] === [2024-06-14 11:19:43,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:43,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1204337510, now seen corresponding path program 7 times [2024-06-14 11:19:43,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:43,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657753204] [2024-06-14 11:19:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:43,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:44,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:44,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657753204] [2024-06-14 11:19:44,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657753204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:44,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:44,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:44,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912300294] [2024-06-14 11:19:44,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:44,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:44,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:44,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:44,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:44,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:44,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 266 transitions, 2822 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) [2024-06-14 11:19:44,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:44,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:44,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:44,373 INFO L124 PetriNetUnfolderBase]: 1579/2664 cut-off events. [2024-06-14 11:19:44,374 INFO L125 PetriNetUnfolderBase]: For 99316/99316 co-relation queries the response was YES. [2024-06-14 11:19:44,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16107 conditions, 2664 events. 1579/2664 cut-off events. For 99316/99316 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 15528 event pairs, 348 based on Foata normal form. 8/2671 useless extension candidates. Maximal degree in co-relation 16001. Up to 2353 conditions per place. [2024-06-14 11:19:44,394 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 246 selfloop transitions, 32 changer transitions 0/284 dead transitions. [2024-06-14 11:19:44,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 284 transitions, 3462 flow [2024-06-14 11:19:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-14 11:19:44,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-14 11:19:44,395 INFO L175 Difference]: Start difference. First operand has 223 places, 266 transitions, 2822 flow. Second operand 7 states and 149 transitions. [2024-06-14 11:19:44,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 284 transitions, 3462 flow [2024-06-14 11:19:44,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 284 transitions, 3423 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:44,568 INFO L231 Difference]: Finished difference. Result has 228 places, 267 transitions, 2866 flow [2024-06-14 11:19:44,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2866, PETRI_PLACES=228, PETRI_TRANSITIONS=267} [2024-06-14 11:19:44,569 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-14 11:19:44,569 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 267 transitions, 2866 flow [2024-06-14 11:19:44,569 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) [2024-06-14 11:19:44,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:44,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:44,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:19:44,569 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)] === [2024-06-14 11:19:44,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:44,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1846809604, now seen corresponding path program 4 times [2024-06-14 11:19:44,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:44,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843015643] [2024-06-14 11:19:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:44,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:44,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:44,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843015643] [2024-06-14 11:19:44,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843015643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:44,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:44,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:44,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901658248] [2024-06-14 11:19:44,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:44,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:44,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:44,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:44,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:44,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:44,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 267 transitions, 2866 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) [2024-06-14 11:19:44,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:44,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:44,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:45,047 INFO L124 PetriNetUnfolderBase]: 1584/2676 cut-off events. [2024-06-14 11:19:45,047 INFO L125 PetriNetUnfolderBase]: For 94798/94812 co-relation queries the response was YES. [2024-06-14 11:19:45,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16325 conditions, 2676 events. 1584/2676 cut-off events. For 94798/94812 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15659 event pairs, 366 based on Foata normal form. 15/2691 useless extension candidates. Maximal degree in co-relation 16217. Up to 2296 conditions per place. [2024-06-14 11:19:45,070 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 217 selfloop transitions, 65 changer transitions 0/288 dead transitions. [2024-06-14 11:19:45,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 288 transitions, 3672 flow [2024-06-14 11:19:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 11:19:45,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-14 11:19:45,071 INFO L175 Difference]: Start difference. First operand has 228 places, 267 transitions, 2866 flow. Second operand 7 states and 155 transitions. [2024-06-14 11:19:45,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 288 transitions, 3672 flow [2024-06-14 11:19:45,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 288 transitions, 3603 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:45,276 INFO L231 Difference]: Finished difference. Result has 230 places, 273 transitions, 3047 flow [2024-06-14 11:19:45,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2797, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3047, PETRI_PLACES=230, PETRI_TRANSITIONS=273} [2024-06-14 11:19:45,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-14 11:19:45,277 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 273 transitions, 3047 flow [2024-06-14 11:19:45,277 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) [2024-06-14 11:19:45,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:45,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:45,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:19:45,277 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)] === [2024-06-14 11:19:45,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:45,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1397607000, now seen corresponding path program 5 times [2024-06-14 11:19:45,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:45,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724447639] [2024-06-14 11:19:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:45,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:45,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:45,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724447639] [2024-06-14 11:19:45,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724447639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:45,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:45,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:45,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525112876] [2024-06-14 11:19:45,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:45,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:45,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:45,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:45,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:45,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:45,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 273 transitions, 3047 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) [2024-06-14 11:19:45,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:45,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:45,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:45,831 INFO L124 PetriNetUnfolderBase]: 1581/2672 cut-off events. [2024-06-14 11:19:45,831 INFO L125 PetriNetUnfolderBase]: For 98317/98331 co-relation queries the response was YES. [2024-06-14 11:19:45,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16529 conditions, 2672 events. 1581/2672 cut-off events. For 98317/98331 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15615 event pairs, 360 based on Foata normal form. 15/2687 useless extension candidates. Maximal degree in co-relation 16420. Up to 2356 conditions per place. [2024-06-14 11:19:45,853 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 250 selfloop transitions, 33 changer transitions 0/289 dead transitions. [2024-06-14 11:19:45,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 289 transitions, 3653 flow [2024-06-14 11:19:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 11:19:45,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 11:19:45,854 INFO L175 Difference]: Start difference. First operand has 230 places, 273 transitions, 3047 flow. Second operand 6 states and 137 transitions. [2024-06-14 11:19:45,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 289 transitions, 3653 flow [2024-06-14 11:19:46,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 289 transitions, 3533 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:46,061 INFO L231 Difference]: Finished difference. Result has 233 places, 273 transitions, 2999 flow [2024-06-14 11:19:46,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2927, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2999, PETRI_PLACES=233, PETRI_TRANSITIONS=273} [2024-06-14 11:19:46,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-14 11:19:46,061 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 273 transitions, 2999 flow [2024-06-14 11:19:46,061 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) [2024-06-14 11:19:46,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:46,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:46,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:19:46,062 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)] === [2024-06-14 11:19:46,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:46,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1397191290, now seen corresponding path program 6 times [2024-06-14 11:19:46,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:46,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919294719] [2024-06-14 11:19:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:46,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:46,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:46,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919294719] [2024-06-14 11:19:46,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919294719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:46,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:46,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:46,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55268536] [2024-06-14 11:19:46,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:46,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:46,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:46,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:46,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:46,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:46,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 273 transitions, 2999 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) [2024-06-14 11:19:46,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:46,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:46,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:46,615 INFO L124 PetriNetUnfolderBase]: 1586/2681 cut-off events. [2024-06-14 11:19:46,615 INFO L125 PetriNetUnfolderBase]: For 100314/100326 co-relation queries the response was YES. [2024-06-14 11:19:46,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16476 conditions, 2681 events. 1586/2681 cut-off events. For 100314/100326 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15707 event pairs, 366 based on Foata normal form. 13/2694 useless extension candidates. Maximal degree in co-relation 16365. Up to 2318 conditions per place. [2024-06-14 11:19:46,639 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 226 selfloop transitions, 58 changer transitions 0/290 dead transitions. [2024-06-14 11:19:46,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 290 transitions, 3759 flow [2024-06-14 11:19:46,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:46,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 11:19:46,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 11:19:46,640 INFO L175 Difference]: Start difference. First operand has 233 places, 273 transitions, 2999 flow. Second operand 6 states and 137 transitions. [2024-06-14 11:19:46,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 290 transitions, 3759 flow [2024-06-14 11:19:46,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 290 transitions, 3579 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:46,894 INFO L231 Difference]: Finished difference. Result has 232 places, 276 transitions, 2997 flow [2024-06-14 11:19:46,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2819, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2997, PETRI_PLACES=232, PETRI_TRANSITIONS=276} [2024-06-14 11:19:46,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-14 11:19:46,895 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 276 transitions, 2997 flow [2024-06-14 11:19:46,895 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) [2024-06-14 11:19:46,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:46,895 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] [2024-06-14 11:19:46,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:19:46,895 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)] === [2024-06-14 11:19:46,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:46,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1392066060, now seen corresponding path program 7 times [2024-06-14 11:19:46,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:46,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944087774] [2024-06-14 11:19:46,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:46,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:47,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:47,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944087774] [2024-06-14 11:19:47,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944087774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:47,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:47,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:47,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536143140] [2024-06-14 11:19:47,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:47,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:47,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:47,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 276 transitions, 2997 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) [2024-06-14 11:19:47,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:47,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:47,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:47,441 INFO L124 PetriNetUnfolderBase]: 1591/2688 cut-off events. [2024-06-14 11:19:47,441 INFO L125 PetriNetUnfolderBase]: For 103766/103778 co-relation queries the response was YES. [2024-06-14 11:19:47,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16477 conditions, 2688 events. 1591/2688 cut-off events. For 103766/103778 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15724 event pairs, 360 based on Foata normal form. 13/2701 useless extension candidates. Maximal degree in co-relation 16367. Up to 2324 conditions per place. [2024-06-14 11:19:47,462 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 222 selfloop transitions, 68 changer transitions 0/296 dead transitions. [2024-06-14 11:19:47,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 296 transitions, 3783 flow [2024-06-14 11:19:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:19:47,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:19:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 11:19:47,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:19:47,463 INFO L175 Difference]: Start difference. First operand has 232 places, 276 transitions, 2997 flow. Second operand 9 states and 189 transitions. [2024-06-14 11:19:47,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 296 transitions, 3783 flow [2024-06-14 11:19:47,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 296 transitions, 3613 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:47,716 INFO L231 Difference]: Finished difference. Result has 237 places, 279 transitions, 3031 flow [2024-06-14 11:19:47,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2833, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3031, PETRI_PLACES=237, PETRI_TRANSITIONS=279} [2024-06-14 11:19:47,716 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-14 11:19:47,716 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 279 transitions, 3031 flow [2024-06-14 11:19:47,716 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) [2024-06-14 11:19:47,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:47,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:47,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:19:47,717 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)] === [2024-06-14 11:19:47,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:47,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1391828910, now seen corresponding path program 8 times [2024-06-14 11:19:47,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:47,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114748539] [2024-06-14 11:19:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:47,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:47,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:47,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114748539] [2024-06-14 11:19:47,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114748539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:47,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:47,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:47,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144898516] [2024-06-14 11:19:47,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:47,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:47,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:47,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:47,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:47,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:47,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 279 transitions, 3031 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) [2024-06-14 11:19:47,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:47,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:47,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:48,269 INFO L124 PetriNetUnfolderBase]: 1588/2684 cut-off events. [2024-06-14 11:19:48,269 INFO L125 PetriNetUnfolderBase]: For 105619/105631 co-relation queries the response was YES. [2024-06-14 11:19:48,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16434 conditions, 2684 events. 1588/2684 cut-off events. For 105619/105631 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15700 event pairs, 360 based on Foata normal form. 13/2697 useless extension candidates. Maximal degree in co-relation 16323. Up to 2321 conditions per place. [2024-06-14 11:19:48,292 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 223 selfloop transitions, 65 changer transitions 0/294 dead transitions. [2024-06-14 11:19:48,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 294 transitions, 3643 flow [2024-06-14 11:19:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:48,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 11:19:48,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-14 11:19:48,293 INFO L175 Difference]: Start difference. First operand has 237 places, 279 transitions, 3031 flow. Second operand 8 states and 171 transitions. [2024-06-14 11:19:48,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 294 transitions, 3643 flow [2024-06-14 11:19:48,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 294 transitions, 3384 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:48,515 INFO L231 Difference]: Finished difference. Result has 238 places, 279 transitions, 2908 flow [2024-06-14 11:19:48,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2908, PETRI_PLACES=238, PETRI_TRANSITIONS=279} [2024-06-14 11:19:48,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-14 11:19:48,515 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 279 transitions, 2908 flow [2024-06-14 11:19:48,515 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) [2024-06-14 11:19:48,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:48,515 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] [2024-06-14 11:19:48,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 11:19:48,516 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)] === [2024-06-14 11:19:48,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:48,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1392066246, now seen corresponding path program 10 times [2024-06-14 11:19:48,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:48,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329349460] [2024-06-14 11:19:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:48,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:48,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:48,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329349460] [2024-06-14 11:19:48,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329349460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:48,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:48,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:48,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300034378] [2024-06-14 11:19:48,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:48,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:48,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:48,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:48,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:48,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:48,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 279 transitions, 2908 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) [2024-06-14 11:19:48,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:48,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:48,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:49,113 INFO L124 PetriNetUnfolderBase]: 1593/2691 cut-off events. [2024-06-14 11:19:49,113 INFO L125 PetriNetUnfolderBase]: For 108994/109006 co-relation queries the response was YES. [2024-06-14 11:19:49,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16364 conditions, 2691 events. 1593/2691 cut-off events. For 108994/109006 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15737 event pairs, 360 based on Foata normal form. 13/2704 useless extension candidates. Maximal degree in co-relation 16253. Up to 2328 conditions per place. [2024-06-14 11:19:49,131 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 226 selfloop transitions, 68 changer transitions 0/300 dead transitions. [2024-06-14 11:19:49,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 300 transitions, 3594 flow [2024-06-14 11:19:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 11:19:49,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-14 11:19:49,132 INFO L175 Difference]: Start difference. First operand has 238 places, 279 transitions, 2908 flow. Second operand 8 states and 175 transitions. [2024-06-14 11:19:49,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 300 transitions, 3594 flow [2024-06-14 11:19:49,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 300 transitions, 3426 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:19:49,357 INFO L231 Difference]: Finished difference. Result has 238 places, 282 transitions, 2946 flow [2024-06-14 11:19:49,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2946, PETRI_PLACES=238, PETRI_TRANSITIONS=282} [2024-06-14 11:19:49,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-14 11:19:49,358 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 282 transitions, 2946 flow [2024-06-14 11:19:49,358 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) [2024-06-14 11:19:49,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:49,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:49,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 11:19:49,358 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)] === [2024-06-14 11:19:49,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:49,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1204334534, now seen corresponding path program 11 times [2024-06-14 11:19:49,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:49,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348025552] [2024-06-14 11:19:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:49,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:49,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:49,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348025552] [2024-06-14 11:19:49,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348025552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:49,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:49,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:49,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131144385] [2024-06-14 11:19:49,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:49,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:49,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:49,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:49,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:49,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:49,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 282 transitions, 2946 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) [2024-06-14 11:19:49,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:49,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:49,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:49,889 INFO L124 PetriNetUnfolderBase]: 1590/2685 cut-off events. [2024-06-14 11:19:49,889 INFO L125 PetriNetUnfolderBase]: For 111512/111516 co-relation queries the response was YES. [2024-06-14 11:19:49,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16546 conditions, 2685 events. 1590/2685 cut-off events. For 111512/111516 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15692 event pairs, 382 based on Foata normal form. 5/2689 useless extension candidates. Maximal degree in co-relation 16434. Up to 2285 conditions per place. [2024-06-14 11:19:49,913 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 202 selfloop transitions, 88 changer transitions 0/296 dead transitions. [2024-06-14 11:19:49,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 296 transitions, 3612 flow [2024-06-14 11:19:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:49,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 11:19:49,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-14 11:19:49,923 INFO L175 Difference]: Start difference. First operand has 238 places, 282 transitions, 2946 flow. Second operand 7 states and 151 transitions. [2024-06-14 11:19:49,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 296 transitions, 3612 flow [2024-06-14 11:19:50,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 296 transitions, 3430 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 11:19:50,153 INFO L231 Difference]: Finished difference. Result has 239 places, 285 transitions, 3012 flow [2024-06-14 11:19:50,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2768, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3012, PETRI_PLACES=239, PETRI_TRANSITIONS=285} [2024-06-14 11:19:50,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-14 11:19:50,154 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 285 transitions, 3012 flow [2024-06-14 11:19:50,154 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) [2024-06-14 11:19:50,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:50,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:50,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 11:19:50,155 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)] === [2024-06-14 11:19:50,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:50,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1203937796, now seen corresponding path program 2 times [2024-06-14 11:19:50,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:50,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8327739] [2024-06-14 11:19:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:50,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:50,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:50,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8327739] [2024-06-14 11:19:50,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8327739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:50,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:50,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:50,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466079450] [2024-06-14 11:19:50,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:50,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:50,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:50,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:50,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 285 transitions, 3012 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) [2024-06-14 11:19:50,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:50,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:50,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:50,688 INFO L124 PetriNetUnfolderBase]: 1610/2718 cut-off events. [2024-06-14 11:19:50,688 INFO L125 PetriNetUnfolderBase]: For 119028/119028 co-relation queries the response was YES. [2024-06-14 11:19:50,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16736 conditions, 2718 events. 1610/2718 cut-off events. For 119028/119028 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15933 event pairs, 348 based on Foata normal form. 6/2723 useless extension candidates. Maximal degree in co-relation 16623. Up to 2371 conditions per place. [2024-06-14 11:19:50,714 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 268 selfloop transitions, 34 changer transitions 0/308 dead transitions. [2024-06-14 11:19:50,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 308 transitions, 3746 flow [2024-06-14 11:19:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:50,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 11:19:50,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 11:19:50,715 INFO L175 Difference]: Start difference. First operand has 239 places, 285 transitions, 3012 flow. Second operand 7 states and 152 transitions. [2024-06-14 11:19:50,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 308 transitions, 3746 flow [2024-06-14 11:19:50,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 308 transitions, 3524 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:50,953 INFO L231 Difference]: Finished difference. Result has 242 places, 288 transitions, 2904 flow [2024-06-14 11:19:50,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2904, PETRI_PLACES=242, PETRI_TRANSITIONS=288} [2024-06-14 11:19:50,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-14 11:19:50,954 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 288 transitions, 2904 flow [2024-06-14 11:19:50,954 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) [2024-06-14 11:19:50,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:50,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:50,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 11:19:50,954 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)] === [2024-06-14 11:19:50,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:50,954 INFO L85 PathProgramCache]: Analyzing trace with hash -761108996, now seen corresponding path program 3 times [2024-06-14 11:19:50,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:50,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661890375] [2024-06-14 11:19:50,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:50,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:51,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:51,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661890375] [2024-06-14 11:19:51,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661890375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:51,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:51,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:51,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001055763] [2024-06-14 11:19:51,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:51,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:51,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:51,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:51,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:51,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:51,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 288 transitions, 2904 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) [2024-06-14 11:19:51,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:51,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:51,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:51,531 INFO L124 PetriNetUnfolderBase]: 1597/2699 cut-off events. [2024-06-14 11:19:51,531 INFO L125 PetriNetUnfolderBase]: For 113401/113401 co-relation queries the response was YES. [2024-06-14 11:19:51,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16304 conditions, 2699 events. 1597/2699 cut-off events. For 113401/113401 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15760 event pairs, 339 based on Foata normal form. 6/2704 useless extension candidates. Maximal degree in co-relation 16189. Up to 2188 conditions per place. [2024-06-14 11:19:51,554 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 264 selfloop transitions, 41 changer transitions 0/311 dead transitions. [2024-06-14 11:19:51,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 311 transitions, 3634 flow [2024-06-14 11:19:51,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:51,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 11:19:51,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 11:19:51,556 INFO L175 Difference]: Start difference. First operand has 242 places, 288 transitions, 2904 flow. Second operand 7 states and 152 transitions. [2024-06-14 11:19:51,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 311 transitions, 3634 flow [2024-06-14 11:19:51,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 311 transitions, 3552 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:51,795 INFO L231 Difference]: Finished difference. Result has 246 places, 290 transitions, 2933 flow [2024-06-14 11:19:51,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2824, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2933, PETRI_PLACES=246, PETRI_TRANSITIONS=290} [2024-06-14 11:19:51,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 11:19:51,796 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 290 transitions, 2933 flow [2024-06-14 11:19:51,796 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) [2024-06-14 11:19:51,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:51,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:51,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 11:19:51,797 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)] === [2024-06-14 11:19:51,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:51,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1371040888, now seen corresponding path program 1 times [2024-06-14 11:19:51,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:51,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885655717] [2024-06-14 11:19:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:51,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:51,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:51,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885655717] [2024-06-14 11:19:51,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885655717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:51,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:51,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:51,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030690339] [2024-06-14 11:19:51,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:51,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:51,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:51,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:51,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:51,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:51,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 290 transitions, 2933 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) [2024-06-14 11:19:51,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:51,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:51,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:52,346 INFO L124 PetriNetUnfolderBase]: 1650/2788 cut-off events. [2024-06-14 11:19:52,346 INFO L125 PetriNetUnfolderBase]: For 126647/126651 co-relation queries the response was YES. [2024-06-14 11:19:52,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17061 conditions, 2788 events. 1650/2788 cut-off events. For 126647/126651 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 16403 event pairs, 346 based on Foata normal form. 10/2798 useless extension candidates. Maximal degree in co-relation 16944. Up to 2385 conditions per place. [2024-06-14 11:19:52,371 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 292 selfloop transitions, 28 changer transitions 0/326 dead transitions. [2024-06-14 11:19:52,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 326 transitions, 3857 flow [2024-06-14 11:19:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:52,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 11:19:52,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-14 11:19:52,372 INFO L175 Difference]: Start difference. First operand has 246 places, 290 transitions, 2933 flow. Second operand 7 states and 159 transitions. [2024-06-14 11:19:52,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 326 transitions, 3857 flow [2024-06-14 11:19:52,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 326 transitions, 3706 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 11:19:52,645 INFO L231 Difference]: Finished difference. Result has 249 places, 295 transitions, 2901 flow [2024-06-14 11:19:52,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2901, PETRI_PLACES=249, PETRI_TRANSITIONS=295} [2024-06-14 11:19:52,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-14 11:19:52,646 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 295 transitions, 2901 flow [2024-06-14 11:19:52,646 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) [2024-06-14 11:19:52,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:52,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:52,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 11:19:52,646 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)] === [2024-06-14 11:19:52,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:52,647 INFO L85 PathProgramCache]: Analyzing trace with hash -497252890, now seen corresponding path program 2 times [2024-06-14 11:19:52,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:52,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580317473] [2024-06-14 11:19:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:52,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:52,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:52,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580317473] [2024-06-14 11:19:52,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580317473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:52,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:52,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:52,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178849812] [2024-06-14 11:19:52,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:52,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:52,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:52,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:52,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:52,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 295 transitions, 2901 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) [2024-06-14 11:19:52,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:52,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:52,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:53,241 INFO L124 PetriNetUnfolderBase]: 1678/2836 cut-off events. [2024-06-14 11:19:53,241 INFO L125 PetriNetUnfolderBase]: For 134002/134006 co-relation queries the response was YES. [2024-06-14 11:19:53,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17072 conditions, 2836 events. 1678/2836 cut-off events. For 134002/134006 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 16785 event pairs, 360 based on Foata normal form. 12/2848 useless extension candidates. Maximal degree in co-relation 16954. Up to 2525 conditions per place. [2024-06-14 11:19:53,263 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 285 selfloop transitions, 26 changer transitions 0/317 dead transitions. [2024-06-14 11:19:53,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 317 transitions, 3619 flow [2024-06-14 11:19:53,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 11:19:53,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 11:19:53,264 INFO L175 Difference]: Start difference. First operand has 249 places, 295 transitions, 2901 flow. Second operand 7 states and 152 transitions. [2024-06-14 11:19:53,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 317 transitions, 3619 flow [2024-06-14 11:19:53,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 317 transitions, 3587 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 11:19:53,572 INFO L231 Difference]: Finished difference. Result has 254 places, 296 transitions, 2937 flow [2024-06-14 11:19:53,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2869, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2937, PETRI_PLACES=254, PETRI_TRANSITIONS=296} [2024-06-14 11:19:53,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-14 11:19:53,572 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 296 transitions, 2937 flow [2024-06-14 11:19:53,572 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) [2024-06-14 11:19:53,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:53,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:53,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 11:19:53,573 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)] === [2024-06-14 11:19:53,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:53,573 INFO L85 PathProgramCache]: Analyzing trace with hash -497400760, now seen corresponding path program 3 times [2024-06-14 11:19:53,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:53,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715023391] [2024-06-14 11:19:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:53,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:53,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:53,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715023391] [2024-06-14 11:19:53,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715023391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:53,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:53,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:53,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373655124] [2024-06-14 11:19:53,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:53,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:53,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:53,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:53,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:53,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:53,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 296 transitions, 2937 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) [2024-06-14 11:19:53,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:53,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:53,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:54,139 INFO L124 PetriNetUnfolderBase]: 1698/2868 cut-off events. [2024-06-14 11:19:54,139 INFO L125 PetriNetUnfolderBase]: For 135209/135213 co-relation queries the response was YES. [2024-06-14 11:19:54,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17414 conditions, 2868 events. 1698/2868 cut-off events. For 135209/135213 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 17004 event pairs, 358 based on Foata normal form. 10/2878 useless extension candidates. Maximal degree in co-relation 17294. Up to 2527 conditions per place. [2024-06-14 11:19:54,166 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 289 selfloop transitions, 28 changer transitions 0/323 dead transitions. [2024-06-14 11:19:54,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 323 transitions, 3707 flow [2024-06-14 11:19:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:19:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:19:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 11:19:54,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-14 11:19:54,167 INFO L175 Difference]: Start difference. First operand has 254 places, 296 transitions, 2937 flow. Second operand 7 states and 155 transitions. [2024-06-14 11:19:54,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 323 transitions, 3707 flow [2024-06-14 11:19:54,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 323 transitions, 3656 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:54,464 INFO L231 Difference]: Finished difference. Result has 257 places, 299 transitions, 2983 flow [2024-06-14 11:19:54,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2983, PETRI_PLACES=257, PETRI_TRANSITIONS=299} [2024-06-14 11:19:54,465 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-14 11:19:54,465 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 299 transitions, 2983 flow [2024-06-14 11:19:54,465 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) [2024-06-14 11:19:54,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:54,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:54,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 11:19:54,465 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)] === [2024-06-14 11:19:54,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:54,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1397182362, now seen corresponding path program 4 times [2024-06-14 11:19:54,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:54,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731874930] [2024-06-14 11:19:54,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:54,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:54,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:54,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731874930] [2024-06-14 11:19:54,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731874930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:54,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:54,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:54,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15833314] [2024-06-14 11:19:54,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:54,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:54,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:54,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:54,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:54,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:54,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 299 transitions, 2983 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) [2024-06-14 11:19:54,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:54,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:54,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:55,108 INFO L124 PetriNetUnfolderBase]: 1726/2916 cut-off events. [2024-06-14 11:19:55,109 INFO L125 PetriNetUnfolderBase]: For 143408/143412 co-relation queries the response was YES. [2024-06-14 11:19:55,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17809 conditions, 2916 events. 1726/2916 cut-off events. For 143408/143412 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 17388 event pairs, 370 based on Foata normal form. 12/2928 useless extension candidates. Maximal degree in co-relation 17687. Up to 2607 conditions per place. [2024-06-14 11:19:55,133 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 293 selfloop transitions, 21 changer transitions 0/320 dead transitions. [2024-06-14 11:19:55,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 320 transitions, 3709 flow [2024-06-14 11:19:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 11:19:55,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 11:19:55,134 INFO L175 Difference]: Start difference. First operand has 257 places, 299 transitions, 2983 flow. Second operand 6 states and 135 transitions. [2024-06-14 11:19:55,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 320 transitions, 3709 flow [2024-06-14 11:19:55,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 320 transitions, 3675 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 11:19:55,483 INFO L231 Difference]: Finished difference. Result has 260 places, 300 transitions, 3011 flow [2024-06-14 11:19:55,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3011, PETRI_PLACES=260, PETRI_TRANSITIONS=300} [2024-06-14 11:19:55,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-14 11:19:55,483 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 300 transitions, 3011 flow [2024-06-14 11:19:55,484 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) [2024-06-14 11:19:55,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:55,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:55,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 11:19:55,484 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)] === [2024-06-14 11:19:55,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:55,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1397330232, now seen corresponding path program 5 times [2024-06-14 11:19:55,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:55,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672074838] [2024-06-14 11:19:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:55,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:55,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:55,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672074838] [2024-06-14 11:19:55,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672074838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:55,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:55,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:55,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010422097] [2024-06-14 11:19:55,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:55,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:55,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:55,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:55,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:55,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:55,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 300 transitions, 3011 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) [2024-06-14 11:19:55,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:55,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:55,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:56,166 INFO L124 PetriNetUnfolderBase]: 1746/2948 cut-off events. [2024-06-14 11:19:56,166 INFO L125 PetriNetUnfolderBase]: For 144610/144614 co-relation queries the response was YES. [2024-06-14 11:19:56,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18151 conditions, 2948 events. 1746/2948 cut-off events. For 144610/144614 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 17546 event pairs, 360 based on Foata normal form. 10/2958 useless extension candidates. Maximal degree in co-relation 18027. Up to 2541 conditions per place. [2024-06-14 11:19:56,194 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 299 selfloop transitions, 24 changer transitions 0/329 dead transitions. [2024-06-14 11:19:56,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 329 transitions, 3916 flow [2024-06-14 11:19:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:19:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:19:56,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 11:19:56,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 11:19:56,195 INFO L175 Difference]: Start difference. First operand has 260 places, 300 transitions, 3011 flow. Second operand 6 states and 142 transitions. [2024-06-14 11:19:56,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 329 transitions, 3916 flow [2024-06-14 11:19:56,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 329 transitions, 3871 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 11:19:56,545 INFO L231 Difference]: Finished difference. Result has 263 places, 302 transitions, 3050 flow [2024-06-14 11:19:56,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2966, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3050, PETRI_PLACES=263, PETRI_TRANSITIONS=302} [2024-06-14 11:19:56,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-14 11:19:56,545 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 302 transitions, 3050 flow [2024-06-14 11:19:56,545 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) [2024-06-14 11:19:56,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:56,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:56,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 11:19:56,546 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)] === [2024-06-14 11:19:56,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:56,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1391819982, now seen corresponding path program 6 times [2024-06-14 11:19:56,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:56,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213948419] [2024-06-14 11:19:56,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:56,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:56,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:56,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213948419] [2024-06-14 11:19:56,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213948419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:56,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:56,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:56,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040808067] [2024-06-14 11:19:56,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:56,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:56,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:56,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:56,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:56,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:56,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 302 transitions, 3050 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) [2024-06-14 11:19:56,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:56,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:56,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:57,170 INFO L124 PetriNetUnfolderBase]: 1728/2922 cut-off events. [2024-06-14 11:19:57,170 INFO L125 PetriNetUnfolderBase]: For 137879/137883 co-relation queries the response was YES. [2024-06-14 11:19:57,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17660 conditions, 2922 events. 1728/2922 cut-off events. For 137879/137883 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 17424 event pairs, 364 based on Foata normal form. 12/2934 useless extension candidates. Maximal degree in co-relation 17534. Up to 2613 conditions per place. [2024-06-14 11:19:57,196 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 296 selfloop transitions, 23 changer transitions 0/325 dead transitions. [2024-06-14 11:19:57,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 325 transitions, 3795 flow [2024-06-14 11:19:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 11:19:57,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:19:57,197 INFO L175 Difference]: Start difference. First operand has 263 places, 302 transitions, 3050 flow. Second operand 8 states and 168 transitions. [2024-06-14 11:19:57,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 325 transitions, 3795 flow [2024-06-14 11:19:57,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 325 transitions, 3701 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:19:57,485 INFO L231 Difference]: Finished difference. Result has 266 places, 303 transitions, 3027 flow [2024-06-14 11:19:57,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2964, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3027, PETRI_PLACES=266, PETRI_TRANSITIONS=303} [2024-06-14 11:19:57,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-14 11:19:57,486 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 303 transitions, 3027 flow [2024-06-14 11:19:57,486 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) [2024-06-14 11:19:57,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:57,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:57,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 11:19:57,486 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)] === [2024-06-14 11:19:57,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1391604780, now seen corresponding path program 1 times [2024-06-14 11:19:57,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:57,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428822516] [2024-06-14 11:19:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:57,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:57,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:57,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428822516] [2024-06-14 11:19:57,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428822516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:57,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:57,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:19:57,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354549469] [2024-06-14 11:19:57,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:57,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:19:57,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:57,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:19:57,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:19:57,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:57,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 303 transitions, 3027 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) [2024-06-14 11:19:57,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:57,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:57,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:58,095 INFO L124 PetriNetUnfolderBase]: 1715/2895 cut-off events. [2024-06-14 11:19:58,095 INFO L125 PetriNetUnfolderBase]: For 124882/124886 co-relation queries the response was YES. [2024-06-14 11:19:58,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17022 conditions, 2895 events. 1715/2895 cut-off events. For 124882/124886 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 17145 event pairs, 341 based on Foata normal form. 10/2905 useless extension candidates. Maximal degree in co-relation 16896. Up to 2522 conditions per place. [2024-06-14 11:19:58,122 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 295 selfloop transitions, 28 changer transitions 0/329 dead transitions. [2024-06-14 11:19:58,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 329 transitions, 3788 flow [2024-06-14 11:19:58,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:19:58,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:19:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 11:19:58,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-14 11:19:58,123 INFO L175 Difference]: Start difference. First operand has 266 places, 303 transitions, 3027 flow. Second operand 8 states and 171 transitions. [2024-06-14 11:19:58,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 329 transitions, 3788 flow [2024-06-14 11:19:58,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 329 transitions, 3743 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 11:19:58,519 INFO L231 Difference]: Finished difference. Result has 268 places, 303 transitions, 3042 flow [2024-06-14 11:19:58,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3042, PETRI_PLACES=268, PETRI_TRANSITIONS=303} [2024-06-14 11:19:58,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-14 11:19:58,519 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 303 transitions, 3042 flow [2024-06-14 11:19:58,519 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) [2024-06-14 11:19:58,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:58,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:58,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 11:19:58,520 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)] === [2024-06-14 11:19:58,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:58,520 INFO L85 PathProgramCache]: Analyzing trace with hash -737770862, now seen corresponding path program 1 times [2024-06-14 11:19:58,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:58,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955634141] [2024-06-14 11:19:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:58,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:58,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:58,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955634141] [2024-06-14 11:19:58,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955634141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:58,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:58,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:19:58,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012567643] [2024-06-14 11:19:58,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:58,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:19:58,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:58,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:19:58,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:19:58,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:58,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 303 transitions, 3042 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) [2024-06-14 11:19:58,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:58,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:58,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:19:59,178 INFO L124 PetriNetUnfolderBase]: 1736/2932 cut-off events. [2024-06-14 11:19:59,179 INFO L125 PetriNetUnfolderBase]: For 123262/123270 co-relation queries the response was YES. [2024-06-14 11:19:59,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17484 conditions, 2932 events. 1736/2932 cut-off events. For 123262/123270 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 17479 event pairs, 397 based on Foata normal form. 9/2940 useless extension candidates. Maximal degree in co-relation 17357. Up to 2352 conditions per place. [2024-06-14 11:19:59,207 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 159 changer transitions 0/342 dead transitions. [2024-06-14 11:19:59,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 342 transitions, 4192 flow [2024-06-14 11:19:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:19:59,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:19:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-14 11:19:59,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-14 11:19:59,208 INFO L175 Difference]: Start difference. First operand has 268 places, 303 transitions, 3042 flow. Second operand 12 states and 255 transitions. [2024-06-14 11:19:59,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 342 transitions, 4192 flow [2024-06-14 11:19:59,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 342 transitions, 4114 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:19:59,621 INFO L231 Difference]: Finished difference. Result has 273 places, 312 transitions, 3444 flow [2024-06-14 11:19:59,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2964, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3444, PETRI_PLACES=273, PETRI_TRANSITIONS=312} [2024-06-14 11:19:59,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-14 11:19:59,622 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 312 transitions, 3444 flow [2024-06-14 11:19:59,622 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) [2024-06-14 11:19:59,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:19:59,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:19:59,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 11:19:59,622 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)] === [2024-06-14 11:19:59,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:19:59,623 INFO L85 PathProgramCache]: Analyzing trace with hash -269123494, now seen corresponding path program 2 times [2024-06-14 11:19:59,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:19:59,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887326679] [2024-06-14 11:19:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:19:59,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:19:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:19:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:19:59,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:19:59,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887326679] [2024-06-14 11:19:59,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887326679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:19:59,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:19:59,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:19:59,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20723396] [2024-06-14 11:19:59,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:19:59,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:19:59,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:19:59,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:19:59,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:19:59,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:19:59,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 312 transitions, 3444 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) [2024-06-14 11:19:59,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:19:59,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:19:59,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:00,388 INFO L124 PetriNetUnfolderBase]: 1749/2955 cut-off events. [2024-06-14 11:20:00,388 INFO L125 PetriNetUnfolderBase]: For 131598/131610 co-relation queries the response was YES. [2024-06-14 11:20:00,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18179 conditions, 2955 events. 1749/2955 cut-off events. For 131598/131610 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17634 event pairs, 380 based on Foata normal form. 13/2968 useless extension candidates. Maximal degree in co-relation 18052. Up to 2542 conditions per place. [2024-06-14 11:20:00,410 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 243 selfloop transitions, 96 changer transitions 0/345 dead transitions. [2024-06-14 11:20:00,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 345 transitions, 4428 flow [2024-06-14 11:20:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:20:00,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:20:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 263 transitions. [2024-06-14 11:20:00,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49343339587242024 [2024-06-14 11:20:00,411 INFO L175 Difference]: Start difference. First operand has 273 places, 312 transitions, 3444 flow. Second operand 13 states and 263 transitions. [2024-06-14 11:20:00,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 345 transitions, 4428 flow [2024-06-14 11:20:00,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 345 transitions, 4107 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:00,807 INFO L231 Difference]: Finished difference. Result has 279 places, 318 transitions, 3441 flow [2024-06-14 11:20:00,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3181, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3441, PETRI_PLACES=279, PETRI_TRANSITIONS=318} [2024-06-14 11:20:00,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-14 11:20:00,808 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 318 transitions, 3441 flow [2024-06-14 11:20:00,808 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) [2024-06-14 11:20:00,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:00,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:00,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 11:20:00,808 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)] === [2024-06-14 11:20:00,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:00,808 INFO L85 PathProgramCache]: Analyzing trace with hash -269129074, now seen corresponding path program 3 times [2024-06-14 11:20:00,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:00,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005919939] [2024-06-14 11:20:00,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:00,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:00,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:00,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005919939] [2024-06-14 11:20:00,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005919939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:00,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:00,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:00,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693572755] [2024-06-14 11:20:00,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:00,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:00,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:00,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:00,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:01,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:01,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 318 transitions, 3441 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) [2024-06-14 11:20:01,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:01,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:01,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:01,474 INFO L124 PetriNetUnfolderBase]: 1746/2951 cut-off events. [2024-06-14 11:20:01,474 INFO L125 PetriNetUnfolderBase]: For 128625/128637 co-relation queries the response was YES. [2024-06-14 11:20:01,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18043 conditions, 2951 events. 1746/2951 cut-off events. For 128625/128637 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17654 event pairs, 380 based on Foata normal form. 13/2964 useless extension candidates. Maximal degree in co-relation 17914. Up to 2539 conditions per place. [2024-06-14 11:20:01,500 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 241 selfloop transitions, 96 changer transitions 0/343 dead transitions. [2024-06-14 11:20:01,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 343 transitions, 4175 flow [2024-06-14 11:20:01,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:20:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:20:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-14 11:20:01,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 11:20:01,501 INFO L175 Difference]: Start difference. First operand has 279 places, 318 transitions, 3441 flow. Second operand 12 states and 246 transitions. [2024-06-14 11:20:01,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 343 transitions, 4175 flow [2024-06-14 11:20:01,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 343 transitions, 4028 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:01,951 INFO L231 Difference]: Finished difference. Result has 282 places, 318 transitions, 3492 flow [2024-06-14 11:20:01,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3492, PETRI_PLACES=282, PETRI_TRANSITIONS=318} [2024-06-14 11:20:01,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-14 11:20:01,952 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 318 transitions, 3492 flow [2024-06-14 11:20:01,952 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) [2024-06-14 11:20:01,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:01,952 INFO 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] [2024-06-14 11:20:01,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 11:20:01,952 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)] === [2024-06-14 11:20:01,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:01,953 INFO L85 PathProgramCache]: Analyzing trace with hash 934337980, now seen corresponding path program 4 times [2024-06-14 11:20:01,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:01,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587317006] [2024-06-14 11:20:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:01,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:02,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:02,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587317006] [2024-06-14 11:20:02,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587317006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:02,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:02,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:02,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403318854] [2024-06-14 11:20:02,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:02,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:02,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:02,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:02,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:02,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:02,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 318 transitions, 3492 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) [2024-06-14 11:20:02,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:02,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:02,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:02,649 INFO L124 PetriNetUnfolderBase]: 1767/2986 cut-off events. [2024-06-14 11:20:02,649 INFO L125 PetriNetUnfolderBase]: For 136502/136514 co-relation queries the response was YES. [2024-06-14 11:20:02,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18547 conditions, 2986 events. 1767/2986 cut-off events. For 136502/136514 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 17825 event pairs, 380 based on Foata normal form. 13/2999 useless extension candidates. Maximal degree in co-relation 18416. Up to 2547 conditions per place. [2024-06-14 11:20:02,679 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 236 selfloop transitions, 108 changer transitions 0/350 dead transitions. [2024-06-14 11:20:02,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 350 transitions, 4470 flow [2024-06-14 11:20:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:20:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:20:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-14 11:20:02,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-14 11:20:02,680 INFO L175 Difference]: Start difference. First operand has 282 places, 318 transitions, 3492 flow. Second operand 12 states and 244 transitions. [2024-06-14 11:20:02,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 350 transitions, 4470 flow [2024-06-14 11:20:03,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 350 transitions, 4278 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 11:20:03,168 INFO L231 Difference]: Finished difference. Result has 284 places, 327 transitions, 3656 flow [2024-06-14 11:20:03,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3656, PETRI_PLACES=284, PETRI_TRANSITIONS=327} [2024-06-14 11:20:03,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-14 11:20:03,169 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 327 transitions, 3656 flow [2024-06-14 11:20:03,169 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) [2024-06-14 11:20:03,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:03,170 INFO 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] [2024-06-14 11:20:03,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 11:20:03,170 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)] === [2024-06-14 11:20:03,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:03,170 INFO L85 PathProgramCache]: Analyzing trace with hash 926986330, now seen corresponding path program 5 times [2024-06-14 11:20:03,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:03,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341509517] [2024-06-14 11:20:03,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:03,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:03,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:03,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341509517] [2024-06-14 11:20:03,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341509517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:03,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:03,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:03,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620015601] [2024-06-14 11:20:03,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:03,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:03,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:03,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:03,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:03,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:03,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 327 transitions, 3656 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) [2024-06-14 11:20:03,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:03,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:03,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:03,882 INFO L124 PetriNetUnfolderBase]: 1772/2995 cut-off events. [2024-06-14 11:20:03,882 INFO L125 PetriNetUnfolderBase]: For 140449/140461 co-relation queries the response was YES. [2024-06-14 11:20:03,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18741 conditions, 2995 events. 1772/2995 cut-off events. For 140449/140461 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 17945 event pairs, 380 based on Foata normal form. 13/3008 useless extension candidates. Maximal degree in co-relation 18608. Up to 2553 conditions per place. [2024-06-14 11:20:03,914 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 241 selfloop transitions, 110 changer transitions 0/357 dead transitions. [2024-06-14 11:20:03,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 357 transitions, 4731 flow [2024-06-14 11:20:03,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 11:20:03,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 11:20:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 298 transitions. [2024-06-14 11:20:03,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845528455284553 [2024-06-14 11:20:03,919 INFO L175 Difference]: Start difference. First operand has 284 places, 327 transitions, 3656 flow. Second operand 15 states and 298 transitions. [2024-06-14 11:20:03,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 357 transitions, 4731 flow [2024-06-14 11:20:04,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 357 transitions, 4578 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:04,454 INFO L231 Difference]: Finished difference. Result has 291 places, 330 transitions, 3772 flow [2024-06-14 11:20:04,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3503, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3772, PETRI_PLACES=291, PETRI_TRANSITIONS=330} [2024-06-14 11:20:04,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-14 11:20:04,454 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 330 transitions, 3772 flow [2024-06-14 11:20:04,454 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) [2024-06-14 11:20:04,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:04,454 INFO 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] [2024-06-14 11:20:04,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 11:20:04,454 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)] === [2024-06-14 11:20:04,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:04,455 INFO L85 PathProgramCache]: Analyzing trace with hash 926980750, now seen corresponding path program 6 times [2024-06-14 11:20:04,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:04,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463230642] [2024-06-14 11:20:04,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:04,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:04,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:04,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463230642] [2024-06-14 11:20:04,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463230642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:04,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:04,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:04,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792210812] [2024-06-14 11:20:04,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:04,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:04,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:04,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:04,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:04,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:04,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 330 transitions, 3772 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) [2024-06-14 11:20:04,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:04,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:04,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:05,114 INFO L124 PetriNetUnfolderBase]: 1769/2991 cut-off events. [2024-06-14 11:20:05,114 INFO L125 PetriNetUnfolderBase]: For 141822/141834 co-relation queries the response was YES. [2024-06-14 11:20:05,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18862 conditions, 2991 events. 1769/2991 cut-off events. For 141822/141834 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 17948 event pairs, 380 based on Foata normal form. 13/3004 useless extension candidates. Maximal degree in co-relation 18727. Up to 2550 conditions per place. [2024-06-14 11:20:05,143 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 238 selfloop transitions, 110 changer transitions 0/354 dead transitions. [2024-06-14 11:20:05,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 354 transitions, 4660 flow [2024-06-14 11:20:05,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:20:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:20:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 263 transitions. [2024-06-14 11:20:05,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49343339587242024 [2024-06-14 11:20:05,144 INFO L175 Difference]: Start difference. First operand has 291 places, 330 transitions, 3772 flow. Second operand 13 states and 263 transitions. [2024-06-14 11:20:05,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 354 transitions, 4660 flow [2024-06-14 11:20:05,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 354 transitions, 4352 flow, removed 22 selfloop flow, removed 12 redundant places. [2024-06-14 11:20:05,709 INFO L231 Difference]: Finished difference. Result has 292 places, 330 transitions, 3690 flow [2024-06-14 11:20:05,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3464, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3690, PETRI_PLACES=292, PETRI_TRANSITIONS=330} [2024-06-14 11:20:05,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-14 11:20:05,709 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 330 transitions, 3690 flow [2024-06-14 11:20:05,709 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) [2024-06-14 11:20:05,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:05,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:05,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 11:20:05,710 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)] === [2024-06-14 11:20:05,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:05,710 INFO L85 PathProgramCache]: Analyzing trace with hash -706216494, now seen corresponding path program 7 times [2024-06-14 11:20:05,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:05,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155424723] [2024-06-14 11:20:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:05,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:05,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:05,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155424723] [2024-06-14 11:20:05,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155424723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:05,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:05,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:05,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254574317] [2024-06-14 11:20:05,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:05,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:05,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:05,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:05,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:05,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:05,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 330 transitions, 3690 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) [2024-06-14 11:20:05,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:05,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:05,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:06,385 INFO L124 PetriNetUnfolderBase]: 1782/3012 cut-off events. [2024-06-14 11:20:06,386 INFO L125 PetriNetUnfolderBase]: For 148104/148112 co-relation queries the response was YES. [2024-06-14 11:20:06,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18928 conditions, 3012 events. 1782/3012 cut-off events. For 148104/148112 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 18049 event pairs, 397 based on Foata normal form. 9/3020 useless extension candidates. Maximal degree in co-relation 18793. Up to 2491 conditions per place. [2024-06-14 11:20:06,413 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 116 changer transitions 0/359 dead transitions. [2024-06-14 11:20:06,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 359 transitions, 4812 flow [2024-06-14 11:20:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 11:20:06,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 11:20:06,414 INFO L175 Difference]: Start difference. First operand has 292 places, 330 transitions, 3690 flow. Second operand 8 states and 183 transitions. [2024-06-14 11:20:06,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 359 transitions, 4812 flow [2024-06-14 11:20:06,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 359 transitions, 4592 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-14 11:20:06,925 INFO L231 Difference]: Finished difference. Result has 288 places, 336 transitions, 3792 flow [2024-06-14 11:20:06,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3470, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3792, PETRI_PLACES=288, PETRI_TRANSITIONS=336} [2024-06-14 11:20:06,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-14 11:20:06,926 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 336 transitions, 3792 flow [2024-06-14 11:20:06,926 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) [2024-06-14 11:20:06,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:06,926 INFO 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] [2024-06-14 11:20:06,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 11:20:06,926 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)] === [2024-06-14 11:20:06,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:06,926 INFO L85 PathProgramCache]: Analyzing trace with hash -539982714, now seen corresponding path program 8 times [2024-06-14 11:20:06,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:06,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899235926] [2024-06-14 11:20:06,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:06,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:07,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:07,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899235926] [2024-06-14 11:20:07,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899235926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:07,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:07,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:07,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254860620] [2024-06-14 11:20:07,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:07,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:07,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:07,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:07,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:07,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:07,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 336 transitions, 3792 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) [2024-06-14 11:20:07,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:07,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:07,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:07,621 INFO L124 PetriNetUnfolderBase]: 1787/3022 cut-off events. [2024-06-14 11:20:07,621 INFO L125 PetriNetUnfolderBase]: For 152371/152383 co-relation queries the response was YES. [2024-06-14 11:20:07,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19085 conditions, 3022 events. 1787/3022 cut-off events. For 152371/152383 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 18165 event pairs, 380 based on Foata normal form. 13/3035 useless extension candidates. Maximal degree in co-relation 18949. Up to 2497 conditions per place. [2024-06-14 11:20:07,652 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 240 selfloop transitions, 125 changer transitions 0/371 dead transitions. [2024-06-14 11:20:07,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 371 transitions, 4928 flow [2024-06-14 11:20:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:20:07,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:20:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-14 11:20:07,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:20:07,653 INFO L175 Difference]: Start difference. First operand has 288 places, 336 transitions, 3792 flow. Second operand 11 states and 242 transitions. [2024-06-14 11:20:07,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 371 transitions, 4928 flow [2024-06-14 11:20:08,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 371 transitions, 4722 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 11:20:08,186 INFO L231 Difference]: Finished difference. Result has 295 places, 339 transitions, 3890 flow [2024-06-14 11:20:08,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3890, PETRI_PLACES=295, PETRI_TRANSITIONS=339} [2024-06-14 11:20:08,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-14 11:20:08,193 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 339 transitions, 3890 flow [2024-06-14 11:20:08,193 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) [2024-06-14 11:20:08,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:08,193 INFO 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] [2024-06-14 11:20:08,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 11:20:08,193 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)] === [2024-06-14 11:20:08,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:08,194 INFO L85 PathProgramCache]: Analyzing trace with hash -702497424, now seen corresponding path program 9 times [2024-06-14 11:20:08,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:08,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862047750] [2024-06-14 11:20:08,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:08,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:08,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:08,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862047750] [2024-06-14 11:20:08,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862047750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:08,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:08,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:08,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235077415] [2024-06-14 11:20:08,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:08,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:08,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:08,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:08,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:08,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 339 transitions, 3890 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) [2024-06-14 11:20:08,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:08,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:08,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:08,897 INFO L124 PetriNetUnfolderBase]: 1792/3031 cut-off events. [2024-06-14 11:20:08,898 INFO L125 PetriNetUnfolderBase]: For 156798/156810 co-relation queries the response was YES. [2024-06-14 11:20:08,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19226 conditions, 3031 events. 1792/3031 cut-off events. For 156798/156810 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18239 event pairs, 380 based on Foata normal form. 13/3044 useless extension candidates. Maximal degree in co-relation 19089. Up to 2638 conditions per place. [2024-06-14 11:20:08,922 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 291 selfloop transitions, 64 changer transitions 0/361 dead transitions. [2024-06-14 11:20:08,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 361 transitions, 4837 flow [2024-06-14 11:20:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 11:20:08,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 11:20:08,923 INFO L175 Difference]: Start difference. First operand has 295 places, 339 transitions, 3890 flow. Second operand 8 states and 177 transitions. [2024-06-14 11:20:08,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 361 transitions, 4837 flow [2024-06-14 11:20:09,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 361 transitions, 4513 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:09,527 INFO L231 Difference]: Finished difference. Result has 294 places, 342 transitions, 3749 flow [2024-06-14 11:20:09,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3572, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3749, PETRI_PLACES=294, PETRI_TRANSITIONS=342} [2024-06-14 11:20:09,528 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-14 11:20:09,528 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 342 transitions, 3749 flow [2024-06-14 11:20:09,528 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) [2024-06-14 11:20:09,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:09,528 INFO 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] [2024-06-14 11:20:09,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 11:20:09,528 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)] === [2024-06-14 11:20:09,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:09,528 INFO L85 PathProgramCache]: Analyzing trace with hash -530728284, now seen corresponding path program 10 times [2024-06-14 11:20:09,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:09,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819947217] [2024-06-14 11:20:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:09,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:09,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:09,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819947217] [2024-06-14 11:20:09,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819947217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:09,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:09,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:09,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783442409] [2024-06-14 11:20:09,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:09,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:09,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:09,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:09,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:09,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:09,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 342 transitions, 3749 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) [2024-06-14 11:20:09,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:09,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:09,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:10,229 INFO L124 PetriNetUnfolderBase]: 1805/3053 cut-off events. [2024-06-14 11:20:10,229 INFO L125 PetriNetUnfolderBase]: For 162332/162344 co-relation queries the response was YES. [2024-06-14 11:20:10,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19239 conditions, 3053 events. 1805/3053 cut-off events. For 162332/162344 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 18398 event pairs, 380 based on Foata normal form. 13/3066 useless extension candidates. Maximal degree in co-relation 19101. Up to 2518 conditions per place. [2024-06-14 11:20:10,262 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 138 changer transitions 0/379 dead transitions. [2024-06-14 11:20:10,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 379 transitions, 4919 flow [2024-06-14 11:20:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:20:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:20:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 275 transitions. [2024-06-14 11:20:10,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159474671669794 [2024-06-14 11:20:10,271 INFO L175 Difference]: Start difference. First operand has 294 places, 342 transitions, 3749 flow. Second operand 13 states and 275 transitions. [2024-06-14 11:20:10,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 379 transitions, 4919 flow [2024-06-14 11:20:10,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 379 transitions, 4767 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:10,874 INFO L231 Difference]: Finished difference. Result has 301 places, 348 transitions, 3941 flow [2024-06-14 11:20:10,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3597, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3941, PETRI_PLACES=301, PETRI_TRANSITIONS=348} [2024-06-14 11:20:10,874 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-14 11:20:10,874 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 348 transitions, 3941 flow [2024-06-14 11:20:10,874 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) [2024-06-14 11:20:10,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:10,874 INFO 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] [2024-06-14 11:20:10,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 11:20:10,874 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)] === [2024-06-14 11:20:10,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:10,875 INFO L85 PathProgramCache]: Analyzing trace with hash -702491844, now seen corresponding path program 11 times [2024-06-14 11:20:10,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:10,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579066983] [2024-06-14 11:20:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:10,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:11,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:11,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579066983] [2024-06-14 11:20:11,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579066983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:11,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:11,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:11,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596854422] [2024-06-14 11:20:11,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:11,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:11,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:11,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:11,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:11,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:11,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 348 transitions, 3941 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) [2024-06-14 11:20:11,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:11,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:11,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:11,605 INFO L124 PetriNetUnfolderBase]: 1802/3049 cut-off events. [2024-06-14 11:20:11,605 INFO L125 PetriNetUnfolderBase]: For 164069/164081 co-relation queries the response was YES. [2024-06-14 11:20:11,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19367 conditions, 3049 events. 1802/3049 cut-off events. For 164069/164081 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 18325 event pairs, 380 based on Foata normal form. 13/3062 useless extension candidates. Maximal degree in co-relation 19228. Up to 2653 conditions per place. [2024-06-14 11:20:11,628 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 296 selfloop transitions, 66 changer transitions 0/368 dead transitions. [2024-06-14 11:20:11,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 368 transitions, 4713 flow [2024-06-14 11:20:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-14 11:20:11,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097560975609756 [2024-06-14 11:20:11,629 INFO L175 Difference]: Start difference. First operand has 301 places, 348 transitions, 3941 flow. Second operand 10 states and 209 transitions. [2024-06-14 11:20:11,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 368 transitions, 4713 flow [2024-06-14 11:20:12,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 368 transitions, 4454 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:12,217 INFO L231 Difference]: Finished difference. Result has 302 places, 348 transitions, 3820 flow [2024-06-14 11:20:12,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3682, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3820, PETRI_PLACES=302, PETRI_TRANSITIONS=348} [2024-06-14 11:20:12,218 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-14 11:20:12,218 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 348 transitions, 3820 flow [2024-06-14 11:20:12,218 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) [2024-06-14 11:20:12,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:12,218 INFO 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] [2024-06-14 11:20:12,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 11:20:12,219 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)] === [2024-06-14 11:20:12,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:12,219 INFO L85 PathProgramCache]: Analyzing trace with hash -530717124, now seen corresponding path program 12 times [2024-06-14 11:20:12,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:12,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617200772] [2024-06-14 11:20:12,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:12,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:12,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:12,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617200772] [2024-06-14 11:20:12,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617200772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:12,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:12,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:12,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110218943] [2024-06-14 11:20:12,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:12,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:12,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:12,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:12,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:12,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:12,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 348 transitions, 3820 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) [2024-06-14 11:20:12,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:12,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:12,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:12,899 INFO L124 PetriNetUnfolderBase]: 1799/3045 cut-off events. [2024-06-14 11:20:12,899 INFO L125 PetriNetUnfolderBase]: For 165002/165014 co-relation queries the response was YES. [2024-06-14 11:20:12,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19165 conditions, 3045 events. 1799/3045 cut-off events. For 165002/165014 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 18348 event pairs, 380 based on Foata normal form. 13/3058 useless extension candidates. Maximal degree in co-relation 19025. Up to 2512 conditions per place. [2024-06-14 11:20:12,929 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 140 changer transitions 0/378 dead transitions. [2024-06-14 11:20:12,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 378 transitions, 4784 flow [2024-06-14 11:20:12,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:20:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:20:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 272 transitions. [2024-06-14 11:20:12,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103189493433395 [2024-06-14 11:20:12,931 INFO L175 Difference]: Start difference. First operand has 302 places, 348 transitions, 3820 flow. Second operand 13 states and 272 transitions. [2024-06-14 11:20:12,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 378 transitions, 4784 flow [2024-06-14 11:20:13,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 378 transitions, 4608 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:13,566 INFO L231 Difference]: Finished difference. Result has 305 places, 348 transitions, 3930 flow [2024-06-14 11:20:13,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3930, PETRI_PLACES=305, PETRI_TRANSITIONS=348} [2024-06-14 11:20:13,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-14 11:20:13,566 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 348 transitions, 3930 flow [2024-06-14 11:20:13,566 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) [2024-06-14 11:20:13,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:13,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:13,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 11:20:13,566 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)] === [2024-06-14 11:20:13,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:13,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1668125764, now seen corresponding path program 13 times [2024-06-14 11:20:13,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:13,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727326511] [2024-06-14 11:20:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:13,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:13,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:13,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727326511] [2024-06-14 11:20:13,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727326511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:13,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:13,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:13,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726619814] [2024-06-14 11:20:13,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:13,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:13,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:13,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:13,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:13,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:13,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 348 transitions, 3930 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) [2024-06-14 11:20:13,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:13,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:13,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:14,248 INFO L124 PetriNetUnfolderBase]: 1844/3123 cut-off events. [2024-06-14 11:20:14,248 INFO L125 PetriNetUnfolderBase]: For 178589/178601 co-relation queries the response was YES. [2024-06-14 11:20:14,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20024 conditions, 3123 events. 1844/3123 cut-off events. For 178589/178601 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 18896 event pairs, 380 based on Foata normal form. 13/3136 useless extension candidates. Maximal degree in co-relation 19883. Up to 2631 conditions per place. [2024-06-14 11:20:14,279 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 274 selfloop transitions, 109 changer transitions 0/389 dead transitions. [2024-06-14 11:20:14,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 389 transitions, 5297 flow [2024-06-14 11:20:14,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:14,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 11:20:14,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:20:14,280 INFO L175 Difference]: Start difference. First operand has 305 places, 348 transitions, 3930 flow. Second operand 8 states and 184 transitions. [2024-06-14 11:20:14,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 389 transitions, 5297 flow [2024-06-14 11:20:15,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 389 transitions, 4979 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-14 11:20:15,086 INFO L231 Difference]: Finished difference. Result has 302 places, 366 transitions, 4149 flow [2024-06-14 11:20:15,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4149, PETRI_PLACES=302, PETRI_TRANSITIONS=366} [2024-06-14 11:20:15,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-14 11:20:15,086 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 366 transitions, 4149 flow [2024-06-14 11:20:15,086 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) [2024-06-14 11:20:15,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:15,086 INFO 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] [2024-06-14 11:20:15,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 11:20:15,087 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)] === [2024-06-14 11:20:15,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:15,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1668136924, now seen corresponding path program 14 times [2024-06-14 11:20:15,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:15,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669758204] [2024-06-14 11:20:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:15,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:15,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:15,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669758204] [2024-06-14 11:20:15,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669758204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:15,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:15,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:15,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182065611] [2024-06-14 11:20:15,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:15,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:15,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:15,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:15,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:15,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:15,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 366 transitions, 4149 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) [2024-06-14 11:20:15,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:15,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:15,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:15,855 INFO L124 PetriNetUnfolderBase]: 1841/3119 cut-off events. [2024-06-14 11:20:15,855 INFO L125 PetriNetUnfolderBase]: For 180081/180093 co-relation queries the response was YES. [2024-06-14 11:20:15,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20012 conditions, 3119 events. 1841/3119 cut-off events. For 180081/180093 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 18899 event pairs, 380 based on Foata normal form. 13/3132 useless extension candidates. Maximal degree in co-relation 19869. Up to 2628 conditions per place. [2024-06-14 11:20:15,887 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 278 selfloop transitions, 108 changer transitions 0/392 dead transitions. [2024-06-14 11:20:15,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 392 transitions, 5289 flow [2024-06-14 11:20:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:15,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 11:20:15,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 11:20:15,888 INFO L175 Difference]: Start difference. First operand has 302 places, 366 transitions, 4149 flow. Second operand 8 states and 187 transitions. [2024-06-14 11:20:15,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 392 transitions, 5289 flow [2024-06-14 11:20:16,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 392 transitions, 5210 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 11:20:16,725 INFO L231 Difference]: Finished difference. Result has 307 places, 366 transitions, 4292 flow [2024-06-14 11:20:16,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4070, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4292, PETRI_PLACES=307, PETRI_TRANSITIONS=366} [2024-06-14 11:20:16,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-14 11:20:16,725 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 366 transitions, 4292 flow [2024-06-14 11:20:16,725 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) [2024-06-14 11:20:16,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:16,726 INFO 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] [2024-06-14 11:20:16,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 11:20:16,726 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)] === [2024-06-14 11:20:16,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:16,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1667958364, now seen corresponding path program 15 times [2024-06-14 11:20:16,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:16,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119388147] [2024-06-14 11:20:16,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:16,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:16,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:16,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119388147] [2024-06-14 11:20:16,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119388147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:16,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:16,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:16,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110111001] [2024-06-14 11:20:16,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:16,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:16,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:16,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:16,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:16,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 366 transitions, 4292 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) [2024-06-14 11:20:16,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:16,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:16,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:17,473 INFO L124 PetriNetUnfolderBase]: 1846/3128 cut-off events. [2024-06-14 11:20:17,473 INFO L125 PetriNetUnfolderBase]: For 184955/184967 co-relation queries the response was YES. [2024-06-14 11:20:17,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20372 conditions, 3128 events. 1846/3128 cut-off events. For 184955/184967 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18935 event pairs, 380 based on Foata normal form. 13/3141 useless extension candidates. Maximal degree in co-relation 20227. Up to 2634 conditions per place. [2024-06-14 11:20:17,506 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 117 changer transitions 0/395 dead transitions. [2024-06-14 11:20:17,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 395 transitions, 5495 flow [2024-06-14 11:20:17,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:20:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:20:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-14 11:20:17,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-14 11:20:17,507 INFO L175 Difference]: Start difference. First operand has 307 places, 366 transitions, 4292 flow. Second operand 11 states and 235 transitions. [2024-06-14 11:20:17,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 395 transitions, 5495 flow [2024-06-14 11:20:18,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 395 transitions, 5277 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:18,286 INFO L231 Difference]: Finished difference. Result has 313 places, 369 transitions, 4369 flow [2024-06-14 11:20:18,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4080, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4369, PETRI_PLACES=313, PETRI_TRANSITIONS=369} [2024-06-14 11:20:18,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-14 11:20:18,287 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 369 transitions, 4369 flow [2024-06-14 11:20:18,287 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) [2024-06-14 11:20:18,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:18,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:18,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 11:20:18,288 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)] === [2024-06-14 11:20:18,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:18,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1667952784, now seen corresponding path program 16 times [2024-06-14 11:20:18,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:18,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728808483] [2024-06-14 11:20:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:18,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:18,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:18,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728808483] [2024-06-14 11:20:18,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728808483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:18,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:18,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:18,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150662788] [2024-06-14 11:20:18,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:18,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:18,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:18,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:18,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:18,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:18,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 369 transitions, 4369 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) [2024-06-14 11:20:18,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:18,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:18,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:19,018 INFO L124 PetriNetUnfolderBase]: 1843/3124 cut-off events. [2024-06-14 11:20:19,019 INFO L125 PetriNetUnfolderBase]: For 186216/186228 co-relation queries the response was YES. [2024-06-14 11:20:19,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20335 conditions, 3124 events. 1843/3124 cut-off events. For 186216/186228 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18915 event pairs, 380 based on Foata normal form. 13/3137 useless extension candidates. Maximal degree in co-relation 20189. Up to 2631 conditions per place. [2024-06-14 11:20:19,051 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 116 changer transitions 0/394 dead transitions. [2024-06-14 11:20:19,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 394 transitions, 5517 flow [2024-06-14 11:20:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 11:20:19,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 11:20:19,052 INFO L175 Difference]: Start difference. First operand has 313 places, 369 transitions, 4369 flow. Second operand 10 states and 219 transitions. [2024-06-14 11:20:19,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 394 transitions, 5517 flow [2024-06-14 11:20:19,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 394 transitions, 5324 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 11:20:19,917 INFO L231 Difference]: Finished difference. Result has 317 places, 369 transitions, 4414 flow [2024-06-14 11:20:19,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4176, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4414, PETRI_PLACES=317, PETRI_TRANSITIONS=369} [2024-06-14 11:20:19,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-14 11:20:19,918 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 369 transitions, 4414 flow [2024-06-14 11:20:19,918 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) [2024-06-14 11:20:19,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:19,918 INFO 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] [2024-06-14 11:20:19,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 11:20:19,919 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)] === [2024-06-14 11:20:19,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:19,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1668304324, now seen corresponding path program 17 times [2024-06-14 11:20:19,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:19,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839767805] [2024-06-14 11:20:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:19,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:20,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:20,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839767805] [2024-06-14 11:20:20,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839767805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:20,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:20,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:20,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771595132] [2024-06-14 11:20:20,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:20,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:20,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:20,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:20,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 369 transitions, 4414 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) [2024-06-14 11:20:20,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:20,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:20,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:20,641 INFO L124 PetriNetUnfolderBase]: 1840/3120 cut-off events. [2024-06-14 11:20:20,641 INFO L125 PetriNetUnfolderBase]: For 187791/187803 co-relation queries the response was YES. [2024-06-14 11:20:20,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20294 conditions, 3120 events. 1840/3120 cut-off events. For 187791/187803 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18890 event pairs, 380 based on Foata normal form. 13/3133 useless extension candidates. Maximal degree in co-relation 20147. Up to 2628 conditions per place. [2024-06-14 11:20:20,674 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 117 changer transitions 0/396 dead transitions. [2024-06-14 11:20:20,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 396 transitions, 5418 flow [2024-06-14 11:20:20,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-14 11:20:20,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:20:20,677 INFO L175 Difference]: Start difference. First operand has 317 places, 369 transitions, 4414 flow. Second operand 10 states and 220 transitions. [2024-06-14 11:20:20,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 396 transitions, 5418 flow [2024-06-14 11:20:21,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 396 transitions, 5133 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:21,453 INFO L231 Difference]: Finished difference. Result has 318 places, 369 transitions, 4373 flow [2024-06-14 11:20:21,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4373, PETRI_PLACES=318, PETRI_TRANSITIONS=369} [2024-06-14 11:20:21,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-14 11:20:21,453 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 369 transitions, 4373 flow [2024-06-14 11:20:21,453 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) [2024-06-14 11:20:21,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:21,454 INFO 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] [2024-06-14 11:20:21,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 11:20:21,454 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)] === [2024-06-14 11:20:21,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1668309904, now seen corresponding path program 18 times [2024-06-14 11:20:21,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:21,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925651574] [2024-06-14 11:20:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:21,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:21,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:21,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925651574] [2024-06-14 11:20:21,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925651574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:21,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:21,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:21,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505697447] [2024-06-14 11:20:21,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:21,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:21,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:21,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:21,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:21,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:21,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 369 transitions, 4373 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) [2024-06-14 11:20:21,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:21,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:21,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:22,240 INFO L124 PetriNetUnfolderBase]: 1837/3116 cut-off events. [2024-06-14 11:20:22,240 INFO L125 PetriNetUnfolderBase]: For 188371/188383 co-relation queries the response was YES. [2024-06-14 11:20:22,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20217 conditions, 3116 events. 1837/3116 cut-off events. For 188371/188383 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18852 event pairs, 380 based on Foata normal form. 13/3129 useless extension candidates. Maximal degree in co-relation 20069. Up to 2625 conditions per place. [2024-06-14 11:20:22,269 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 112 changer transitions 0/397 dead transitions. [2024-06-14 11:20:22,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 397 transitions, 5225 flow [2024-06-14 11:20:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-14 11:20:22,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-14 11:20:22,270 INFO L175 Difference]: Start difference. First operand has 318 places, 369 transitions, 4373 flow. Second operand 9 states and 206 transitions. [2024-06-14 11:20:22,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 397 transitions, 5225 flow [2024-06-14 11:20:23,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 397 transitions, 4913 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-14 11:20:23,115 INFO L231 Difference]: Finished difference. Result has 316 places, 369 transitions, 4295 flow [2024-06-14 11:20:23,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4295, PETRI_PLACES=316, PETRI_TRANSITIONS=369} [2024-06-14 11:20:23,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-14 11:20:23,116 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 369 transitions, 4295 flow [2024-06-14 11:20:23,116 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) [2024-06-14 11:20:23,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:23,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:23,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 11:20:23,116 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)] === [2024-06-14 11:20:23,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:23,117 INFO L85 PathProgramCache]: Analyzing trace with hash 501480636, now seen corresponding path program 19 times [2024-06-14 11:20:23,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:23,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490769131] [2024-06-14 11:20:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:23,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:23,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:23,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490769131] [2024-06-14 11:20:23,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490769131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:23,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:23,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:23,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427530024] [2024-06-14 11:20:23,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:23,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:23,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:23,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:23,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:23,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:23,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 369 transitions, 4295 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) [2024-06-14 11:20:23,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:23,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:23,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:23,824 INFO L124 PetriNetUnfolderBase]: 1850/3138 cut-off events. [2024-06-14 11:20:23,824 INFO L125 PetriNetUnfolderBase]: For 191426/191438 co-relation queries the response was YES. [2024-06-14 11:20:23,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20359 conditions, 3138 events. 1850/3138 cut-off events. For 191426/191438 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 19031 event pairs, 380 based on Foata normal form. 13/3151 useless extension candidates. Maximal degree in co-relation 20211. Up to 2561 conditions per place. [2024-06-14 11:20:23,858 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 178 changer transitions 0/405 dead transitions. [2024-06-14 11:20:23,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 405 transitions, 5553 flow [2024-06-14 11:20:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:20:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:20:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-14 11:20:23,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-14 11:20:23,859 INFO L175 Difference]: Start difference. First operand has 316 places, 369 transitions, 4295 flow. Second operand 12 states and 255 transitions. [2024-06-14 11:20:23,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 405 transitions, 5553 flow [2024-06-14 11:20:24,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 405 transitions, 5287 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:24,745 INFO L231 Difference]: Finished difference. Result has 318 places, 375 transitions, 4467 flow [2024-06-14 11:20:24,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4033, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4467, PETRI_PLACES=318, PETRI_TRANSITIONS=375} [2024-06-14 11:20:24,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-14 11:20:24,745 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 375 transitions, 4467 flow [2024-06-14 11:20:24,745 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) [2024-06-14 11:20:24,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:24,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:24,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 11:20:24,746 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)] === [2024-06-14 11:20:24,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:24,746 INFO L85 PathProgramCache]: Analyzing trace with hash 494123406, now seen corresponding path program 20 times [2024-06-14 11:20:24,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:24,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183970003] [2024-06-14 11:20:24,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:24,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:24,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:24,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183970003] [2024-06-14 11:20:24,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183970003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:24,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:24,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:24,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319280863] [2024-06-14 11:20:24,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:24,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:24,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:24,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:24,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:24,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:24,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 375 transitions, 4467 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) [2024-06-14 11:20:24,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:24,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:24,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:25,528 INFO L124 PetriNetUnfolderBase]: 1855/3147 cut-off events. [2024-06-14 11:20:25,528 INFO L125 PetriNetUnfolderBase]: For 191483/191495 co-relation queries the response was YES. [2024-06-14 11:20:25,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20545 conditions, 3147 events. 1855/3147 cut-off events. For 191483/191495 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19128 event pairs, 380 based on Foata normal form. 13/3160 useless extension candidates. Maximal degree in co-relation 20397. Up to 2567 conditions per place. [2024-06-14 11:20:25,561 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 225 selfloop transitions, 182 changer transitions 0/413 dead transitions. [2024-06-14 11:20:25,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 413 transitions, 5567 flow [2024-06-14 11:20:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:20:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:20:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-14 11:20:25,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532520325203252 [2024-06-14 11:20:25,562 INFO L175 Difference]: Start difference. First operand has 318 places, 375 transitions, 4467 flow. Second operand 12 states and 262 transitions. [2024-06-14 11:20:25,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 413 transitions, 5567 flow [2024-06-14 11:20:26,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 413 transitions, 5285 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:26,562 INFO L231 Difference]: Finished difference. Result has 321 places, 378 transitions, 4605 flow [2024-06-14 11:20:26,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4605, PETRI_PLACES=321, PETRI_TRANSITIONS=378} [2024-06-14 11:20:26,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-14 11:20:26,562 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 378 transitions, 4605 flow [2024-06-14 11:20:26,562 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) [2024-06-14 11:20:26,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:26,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:26,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 11:20:26,563 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)] === [2024-06-14 11:20:26,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:26,564 INFO L85 PathProgramCache]: Analyzing trace with hash 833948196, now seen corresponding path program 21 times [2024-06-14 11:20:26,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:26,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949532307] [2024-06-14 11:20:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:26,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:26,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:26,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949532307] [2024-06-14 11:20:26,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949532307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:26,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:26,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:26,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023691385] [2024-06-14 11:20:26,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:26,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:26,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:26,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:26,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:26,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:26,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 378 transitions, 4605 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) [2024-06-14 11:20:26,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:26,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:26,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:27,256 INFO L124 PetriNetUnfolderBase]: 1852/3141 cut-off events. [2024-06-14 11:20:27,256 INFO L125 PetriNetUnfolderBase]: For 188938/188942 co-relation queries the response was YES. [2024-06-14 11:20:27,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20500 conditions, 3141 events. 1852/3141 cut-off events. For 188938/188942 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19080 event pairs, 402 based on Foata normal form. 5/3145 useless extension candidates. Maximal degree in co-relation 20352. Up to 2564 conditions per place. [2024-06-14 11:20:27,289 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 214 selfloop transitions, 176 changer transitions 0/396 dead transitions. [2024-06-14 11:20:27,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 396 transitions, 5587 flow [2024-06-14 11:20:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:27,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 11:20:27,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:20:27,290 INFO L175 Difference]: Start difference. First operand has 321 places, 378 transitions, 4605 flow. Second operand 10 states and 210 transitions. [2024-06-14 11:20:27,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 396 transitions, 5587 flow [2024-06-14 11:20:28,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 396 transitions, 5227 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-14 11:20:28,223 INFO L231 Difference]: Finished difference. Result has 320 places, 378 transitions, 4607 flow [2024-06-14 11:20:28,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4249, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4607, PETRI_PLACES=320, PETRI_TRANSITIONS=378} [2024-06-14 11:20:28,223 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-14 11:20:28,223 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 378 transitions, 4607 flow [2024-06-14 11:20:28,223 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) [2024-06-14 11:20:28,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:28,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:28,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 11:20:28,224 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)] === [2024-06-14 11:20:28,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:28,224 INFO L85 PathProgramCache]: Analyzing trace with hash 494128986, now seen corresponding path program 22 times [2024-06-14 11:20:28,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:28,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245716828] [2024-06-14 11:20:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:28,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:28,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:28,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245716828] [2024-06-14 11:20:28,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245716828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:28,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:28,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:28,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437114779] [2024-06-14 11:20:28,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:28,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:28,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:28,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:28,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:28,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:28,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 378 transitions, 4607 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) [2024-06-14 11:20:28,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:28,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:28,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:28,962 INFO L124 PetriNetUnfolderBase]: 1849/3139 cut-off events. [2024-06-14 11:20:28,963 INFO L125 PetriNetUnfolderBase]: For 181317/181329 co-relation queries the response was YES. [2024-06-14 11:20:28,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20308 conditions, 3139 events. 1849/3139 cut-off events. For 181317/181329 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19062 event pairs, 380 based on Foata normal form. 13/3152 useless extension candidates. Maximal degree in co-relation 20161. Up to 2561 conditions per place. [2024-06-14 11:20:28,995 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 182 changer transitions 0/414 dead transitions. [2024-06-14 11:20:28,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 414 transitions, 5511 flow [2024-06-14 11:20:28,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:20:28,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:20:28,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 295 transitions. [2024-06-14 11:20:28,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5139372822299652 [2024-06-14 11:20:28,996 INFO L175 Difference]: Start difference. First operand has 320 places, 378 transitions, 4607 flow. Second operand 14 states and 295 transitions. [2024-06-14 11:20:28,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 414 transitions, 5511 flow [2024-06-14 11:20:29,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 414 transitions, 5089 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:29,846 INFO L231 Difference]: Finished difference. Result has 325 places, 378 transitions, 4563 flow [2024-06-14 11:20:29,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4185, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4563, PETRI_PLACES=325, PETRI_TRANSITIONS=378} [2024-06-14 11:20:29,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-14 11:20:29,847 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 378 transitions, 4563 flow [2024-06-14 11:20:29,847 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) [2024-06-14 11:20:29,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:29,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:29,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 11:20:29,847 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)] === [2024-06-14 11:20:29,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:29,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1764753694, now seen corresponding path program 23 times [2024-06-14 11:20:29,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:29,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030887115] [2024-06-14 11:20:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:29,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:29,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:29,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030887115] [2024-06-14 11:20:29,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030887115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:29,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:29,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:29,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424913162] [2024-06-14 11:20:29,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:29,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:29,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:29,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:30,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:30,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 378 transitions, 4563 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) [2024-06-14 11:20:30,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:30,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:30,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:30,533 INFO L124 PetriNetUnfolderBase]: 1862/3161 cut-off events. [2024-06-14 11:20:30,533 INFO L125 PetriNetUnfolderBase]: For 188822/188834 co-relation queries the response was YES. [2024-06-14 11:20:30,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20596 conditions, 3161 events. 1862/3161 cut-off events. For 188822/188834 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 19214 event pairs, 386 based on Foata normal form. 13/3174 useless extension candidates. Maximal degree in co-relation 20448. Up to 2549 conditions per place. [2024-06-14 11:20:30,566 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 229 selfloop transitions, 178 changer transitions 0/413 dead transitions. [2024-06-14 11:20:30,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 413 transitions, 5719 flow [2024-06-14 11:20:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:20:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:20:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-14 11:20:30,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-14 11:20:30,567 INFO L175 Difference]: Start difference. First operand has 325 places, 378 transitions, 4563 flow. Second operand 12 states and 254 transitions. [2024-06-14 11:20:30,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 413 transitions, 5719 flow [2024-06-14 11:20:31,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 413 transitions, 5231 flow, removed 4 selfloop flow, removed 17 redundant places. [2024-06-14 11:20:31,468 INFO L231 Difference]: Finished difference. Result has 320 places, 384 transitions, 4559 flow [2024-06-14 11:20:31,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4559, PETRI_PLACES=320, PETRI_TRANSITIONS=384} [2024-06-14 11:20:31,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-14 11:20:31,468 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 384 transitions, 4559 flow [2024-06-14 11:20:31,468 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) [2024-06-14 11:20:31,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:31,468 INFO 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] [2024-06-14 11:20:31,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 11:20:31,469 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)] === [2024-06-14 11:20:31,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:31,469 INFO L85 PathProgramCache]: Analyzing trace with hash -376154332, now seen corresponding path program 24 times [2024-06-14 11:20:31,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:31,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245875143] [2024-06-14 11:20:31,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:31,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:31,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:31,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245875143] [2024-06-14 11:20:31,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245875143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:31,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:31,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:31,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812895960] [2024-06-14 11:20:31,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:31,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:31,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:31,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:31,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:31,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:31,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 384 transitions, 4559 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) [2024-06-14 11:20:31,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:31,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:31,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:32,204 INFO L124 PetriNetUnfolderBase]: 1867/3170 cut-off events. [2024-06-14 11:20:32,204 INFO L125 PetriNetUnfolderBase]: For 186828/186840 co-relation queries the response was YES. [2024-06-14 11:20:32,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20835 conditions, 3170 events. 1867/3170 cut-off events. For 186828/186840 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 19290 event pairs, 380 based on Foata normal form. 13/3183 useless extension candidates. Maximal degree in co-relation 20688. Up to 2703 conditions per place. [2024-06-14 11:20:32,239 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 337 selfloop transitions, 74 changer transitions 0/417 dead transitions. [2024-06-14 11:20:32,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 417 transitions, 5659 flow [2024-06-14 11:20:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 11:20:32,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 11:20:32,240 INFO L175 Difference]: Start difference. First operand has 320 places, 384 transitions, 4559 flow. Second operand 10 states and 219 transitions. [2024-06-14 11:20:32,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 417 transitions, 5659 flow [2024-06-14 11:20:33,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 417 transitions, 5432 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:33,137 INFO L231 Difference]: Finished difference. Result has 322 places, 387 transitions, 4532 flow [2024-06-14 11:20:33,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4332, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4532, PETRI_PLACES=322, PETRI_TRANSITIONS=387} [2024-06-14 11:20:33,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-14 11:20:33,137 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 387 transitions, 4532 flow [2024-06-14 11:20:33,138 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) [2024-06-14 11:20:33,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:33,138 INFO 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] [2024-06-14 11:20:33,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 11:20:33,138 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)] === [2024-06-14 11:20:33,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:33,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1804231104, now seen corresponding path program 25 times [2024-06-14 11:20:33,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:33,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114536488] [2024-06-14 11:20:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:33,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:33,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:33,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114536488] [2024-06-14 11:20:33,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114536488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:33,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:33,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:33,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497860203] [2024-06-14 11:20:33,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:33,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:33,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:33,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:33,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:33,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:33,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 387 transitions, 4532 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) [2024-06-14 11:20:33,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:33,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:33,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:33,907 INFO L124 PetriNetUnfolderBase]: 1864/3166 cut-off events. [2024-06-14 11:20:33,908 INFO L125 PetriNetUnfolderBase]: For 187357/187369 co-relation queries the response was YES. [2024-06-14 11:20:33,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20849 conditions, 3166 events. 1864/3166 cut-off events. For 187357/187369 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 19238 event pairs, 380 based on Foata normal form. 13/3179 useless extension candidates. Maximal degree in co-relation 20700. Up to 2700 conditions per place. [2024-06-14 11:20:33,935 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 333 selfloop transitions, 72 changer transitions 0/411 dead transitions. [2024-06-14 11:20:33,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 411 transitions, 5402 flow [2024-06-14 11:20:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:33,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 11:20:33,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 11:20:33,936 INFO L175 Difference]: Start difference. First operand has 322 places, 387 transitions, 4532 flow. Second operand 8 states and 182 transitions. [2024-06-14 11:20:33,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 411 transitions, 5402 flow [2024-06-14 11:20:34,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 411 transitions, 4901 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-14 11:20:34,753 INFO L231 Difference]: Finished difference. Result has 319 places, 387 transitions, 4181 flow [2024-06-14 11:20:34,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4031, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4181, PETRI_PLACES=319, PETRI_TRANSITIONS=387} [2024-06-14 11:20:34,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-14 11:20:34,754 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 387 transitions, 4181 flow [2024-06-14 11:20:34,754 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) [2024-06-14 11:20:34,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:34,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:34,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 11:20:34,754 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)] === [2024-06-14 11:20:34,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:34,754 INFO L85 PathProgramCache]: Analyzing trace with hash -363256162, now seen corresponding path program 26 times [2024-06-14 11:20:34,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:34,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345270811] [2024-06-14 11:20:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:34,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:34,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:34,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345270811] [2024-06-14 11:20:34,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345270811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:34,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:34,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:34,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700919706] [2024-06-14 11:20:34,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:34,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:34,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:34,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:34,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:34,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:34,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 387 transitions, 4181 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) [2024-06-14 11:20:34,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:34,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:34,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:35,462 INFO L124 PetriNetUnfolderBase]: 1869/3175 cut-off events. [2024-06-14 11:20:35,462 INFO L125 PetriNetUnfolderBase]: For 190541/190553 co-relation queries the response was YES. [2024-06-14 11:20:35,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20501 conditions, 3175 events. 1869/3175 cut-off events. For 190541/190553 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 19330 event pairs, 386 based on Foata normal form. 13/3188 useless extension candidates. Maximal degree in co-relation 20353. Up to 2603 conditions per place. [2024-06-14 11:20:35,495 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 145 changer transitions 0/412 dead transitions. [2024-06-14 11:20:35,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 412 transitions, 5251 flow [2024-06-14 11:20:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:35,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 11:20:35,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 11:20:35,496 INFO L175 Difference]: Start difference. First operand has 319 places, 387 transitions, 4181 flow. Second operand 8 states and 182 transitions. [2024-06-14 11:20:35,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 412 transitions, 5251 flow [2024-06-14 11:20:36,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 412 transitions, 5107 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:20:36,408 INFO L231 Difference]: Finished difference. Result has 320 places, 390 transitions, 4375 flow [2024-06-14 11:20:36,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4037, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4375, PETRI_PLACES=320, PETRI_TRANSITIONS=390} [2024-06-14 11:20:36,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-14 11:20:36,409 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 390 transitions, 4375 flow [2024-06-14 11:20:36,409 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) [2024-06-14 11:20:36,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:36,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:36,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 11:20:36,409 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)] === [2024-06-14 11:20:36,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:36,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1798493934, now seen corresponding path program 27 times [2024-06-14 11:20:36,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:36,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034523955] [2024-06-14 11:20:36,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:36,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:36,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:36,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034523955] [2024-06-14 11:20:36,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034523955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:36,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:36,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:36,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648706547] [2024-06-14 11:20:36,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:36,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:36,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:36,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:36,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:36,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:36,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 390 transitions, 4375 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) [2024-06-14 11:20:36,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:36,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:36,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:37,094 INFO L124 PetriNetUnfolderBase]: 1874/3184 cut-off events. [2024-06-14 11:20:37,094 INFO L125 PetriNetUnfolderBase]: For 195313/195325 co-relation queries the response was YES. [2024-06-14 11:20:37,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20762 conditions, 3184 events. 1874/3184 cut-off events. For 195313/195325 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19406 event pairs, 380 based on Foata normal form. 13/3197 useless extension candidates. Maximal degree in co-relation 20613. Up to 2609 conditions per place. [2024-06-14 11:20:37,128 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 256 selfloop transitions, 156 changer transitions 0/418 dead transitions. [2024-06-14 11:20:37,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 418 transitions, 5471 flow [2024-06-14 11:20:37,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:20:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:20:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-14 11:20:37,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-14 11:20:37,129 INFO L175 Difference]: Start difference. First operand has 320 places, 390 transitions, 4375 flow. Second operand 11 states and 235 transitions. [2024-06-14 11:20:37,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 418 transitions, 5471 flow [2024-06-14 11:20:37,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 418 transitions, 5222 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:37,962 INFO L231 Difference]: Finished difference. Result has 326 places, 393 transitions, 4492 flow [2024-06-14 11:20:37,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4492, PETRI_PLACES=326, PETRI_TRANSITIONS=393} [2024-06-14 11:20:37,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-14 11:20:37,963 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 393 transitions, 4492 flow [2024-06-14 11:20:37,963 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) [2024-06-14 11:20:37,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:37,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:37,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 11:20:37,963 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)] === [2024-06-14 11:20:37,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:37,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1798701324, now seen corresponding path program 28 times [2024-06-14 11:20:37,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:37,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859618873] [2024-06-14 11:20:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:37,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:38,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:38,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859618873] [2024-06-14 11:20:38,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859618873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:38,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:38,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:38,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754114541] [2024-06-14 11:20:38,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:38,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:38,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:38,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:38,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:38,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:38,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 393 transitions, 4492 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) [2024-06-14 11:20:38,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:38,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:38,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:38,703 INFO L124 PetriNetUnfolderBase]: 1879/3193 cut-off events. [2024-06-14 11:20:38,704 INFO L125 PetriNetUnfolderBase]: For 200276/200288 co-relation queries the response was YES. [2024-06-14 11:20:38,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20904 conditions, 3193 events. 1879/3193 cut-off events. For 200276/200288 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19494 event pairs, 380 based on Foata normal form. 13/3206 useless extension candidates. Maximal degree in co-relation 20754. Up to 2615 conditions per place. [2024-06-14 11:20:38,740 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 253 selfloop transitions, 164 changer transitions 0/423 dead transitions. [2024-06-14 11:20:38,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 423 transitions, 5607 flow [2024-06-14 11:20:38,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:20:38,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:20:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 269 transitions. [2024-06-14 11:20:38,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046904315196998 [2024-06-14 11:20:38,741 INFO L175 Difference]: Start difference. First operand has 326 places, 393 transitions, 4492 flow. Second operand 13 states and 269 transitions. [2024-06-14 11:20:38,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 423 transitions, 5607 flow [2024-06-14 11:20:39,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 423 transitions, 5203 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-14 11:20:39,661 INFO L231 Difference]: Finished difference. Result has 330 places, 396 transitions, 4473 flow [2024-06-14 11:20:39,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4473, PETRI_PLACES=330, PETRI_TRANSITIONS=396} [2024-06-14 11:20:39,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-14 11:20:39,661 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 396 transitions, 4473 flow [2024-06-14 11:20:39,661 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) [2024-06-14 11:20:39,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:39,661 INFO 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] [2024-06-14 11:20:39,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 11:20:39,662 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)] === [2024-06-14 11:20:39,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash -204374032, now seen corresponding path program 29 times [2024-06-14 11:20:39,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:39,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024390405] [2024-06-14 11:20:39,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:39,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:39,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:39,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024390405] [2024-06-14 11:20:39,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024390405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:39,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:39,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:39,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37018086] [2024-06-14 11:20:39,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:39,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:39,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:39,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:39,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:39,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:39,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 396 transitions, 4473 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) [2024-06-14 11:20:39,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:39,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:39,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:40,386 INFO L124 PetriNetUnfolderBase]: 1876/3189 cut-off events. [2024-06-14 11:20:40,386 INFO L125 PetriNetUnfolderBase]: For 200322/200334 co-relation queries the response was YES. [2024-06-14 11:20:40,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20793 conditions, 3189 events. 1876/3189 cut-off events. For 200322/200334 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19482 event pairs, 380 based on Foata normal form. 13/3202 useless extension candidates. Maximal degree in co-relation 20642. Up to 2612 conditions per place. [2024-06-14 11:20:40,421 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 254 selfloop transitions, 162 changer transitions 0/422 dead transitions. [2024-06-14 11:20:40,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 422 transitions, 5367 flow [2024-06-14 11:20:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:20:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:20:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-14 11:20:40,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065666041275797 [2024-06-14 11:20:40,422 INFO L175 Difference]: Start difference. First operand has 330 places, 396 transitions, 4473 flow. Second operand 13 states and 270 transitions. [2024-06-14 11:20:40,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 422 transitions, 5367 flow [2024-06-14 11:20:41,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 422 transitions, 4935 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-14 11:20:41,319 INFO L231 Difference]: Finished difference. Result has 332 places, 396 transitions, 4371 flow [2024-06-14 11:20:41,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4041, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4371, PETRI_PLACES=332, PETRI_TRANSITIONS=396} [2024-06-14 11:20:41,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-14 11:20:41,320 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 396 transitions, 4371 flow [2024-06-14 11:20:41,320 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) [2024-06-14 11:20:41,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:41,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:41,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 11:20:41,320 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)] === [2024-06-14 11:20:41,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:41,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1320336164, now seen corresponding path program 30 times [2024-06-14 11:20:41,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:41,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692051659] [2024-06-14 11:20:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:41,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:41,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:41,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692051659] [2024-06-14 11:20:41,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692051659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:41,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:41,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:41,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511383051] [2024-06-14 11:20:41,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:41,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:41,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:41,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:41,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:41,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:41,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 396 transitions, 4371 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) [2024-06-14 11:20:41,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:41,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:41,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:42,026 INFO L124 PetriNetUnfolderBase]: 1873/3183 cut-off events. [2024-06-14 11:20:42,026 INFO L125 PetriNetUnfolderBase]: For 200838/200842 co-relation queries the response was YES. [2024-06-14 11:20:42,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20645 conditions, 3183 events. 1873/3183 cut-off events. For 200838/200842 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19469 event pairs, 402 based on Foata normal form. 5/3187 useless extension candidates. Maximal degree in co-relation 20493. Up to 2521 conditions per place. [2024-06-14 11:20:42,064 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 226 changer transitions 0/418 dead transitions. [2024-06-14 11:20:42,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 418 transitions, 5301 flow [2024-06-14 11:20:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:20:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:20:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-14 11:20:42,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-14 11:20:42,065 INFO L175 Difference]: Start difference. First operand has 332 places, 396 transitions, 4371 flow. Second operand 12 states and 244 transitions. [2024-06-14 11:20:42,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 418 transitions, 5301 flow [2024-06-14 11:20:42,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 418 transitions, 4937 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-14 11:20:42,999 INFO L231 Difference]: Finished difference. Result has 331 places, 399 transitions, 4533 flow [2024-06-14 11:20:43,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4007, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4533, PETRI_PLACES=331, PETRI_TRANSITIONS=399} [2024-06-14 11:20:43,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-14 11:20:43,000 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 399 transitions, 4533 flow [2024-06-14 11:20:43,000 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) [2024-06-14 11:20:43,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:43,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:43,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 11:20:43,001 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)] === [2024-06-14 11:20:43,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:43,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1448194569, now seen corresponding path program 1 times [2024-06-14 11:20:43,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:43,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907025728] [2024-06-14 11:20:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:43,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:43,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:43,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907025728] [2024-06-14 11:20:43,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907025728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:43,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:43,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:43,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162739094] [2024-06-14 11:20:43,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:43,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:43,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:43,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:43,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:43,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:43,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 399 transitions, 4533 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) [2024-06-14 11:20:43,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:43,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:43,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:43,693 INFO L124 PetriNetUnfolderBase]: 1959/3316 cut-off events. [2024-06-14 11:20:43,693 INFO L125 PetriNetUnfolderBase]: For 272566/272574 co-relation queries the response was YES. [2024-06-14 11:20:43,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22955 conditions, 3316 events. 1959/3316 cut-off events. For 272566/272574 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 20165 event pairs, 314 based on Foata normal form. 14/3323 useless extension candidates. Maximal degree in co-relation 22802. Up to 1909 conditions per place. [2024-06-14 11:20:43,728 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 335 selfloop transitions, 101 changer transitions 0/442 dead transitions. [2024-06-14 11:20:43,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 442 transitions, 5973 flow [2024-06-14 11:20:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 11:20:43,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:20:43,729 INFO L175 Difference]: Start difference. First operand has 331 places, 399 transitions, 4533 flow. Second operand 8 states and 192 transitions. [2024-06-14 11:20:43,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 442 transitions, 5973 flow [2024-06-14 11:20:44,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 442 transitions, 5469 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-14 11:20:44,842 INFO L231 Difference]: Finished difference. Result has 329 places, 402 transitions, 4291 flow [2024-06-14 11:20:44,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4029, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4291, PETRI_PLACES=329, PETRI_TRANSITIONS=402} [2024-06-14 11:20:44,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-14 11:20:44,843 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 402 transitions, 4291 flow [2024-06-14 11:20:44,843 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) [2024-06-14 11:20:44,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:44,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:44,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 11:20:44,843 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)] === [2024-06-14 11:20:44,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:44,843 INFO L85 PathProgramCache]: Analyzing trace with hash 768729067, now seen corresponding path program 2 times [2024-06-14 11:20:44,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:44,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242664697] [2024-06-14 11:20:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:44,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:45,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:45,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242664697] [2024-06-14 11:20:45,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242664697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:45,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:45,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:45,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032120433] [2024-06-14 11:20:45,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:45,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:45,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:45,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:45,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:45,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:45,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 402 transitions, 4291 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) [2024-06-14 11:20:45,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:45,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:45,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:45,684 INFO L124 PetriNetUnfolderBase]: 1987/3371 cut-off events. [2024-06-14 11:20:45,684 INFO L125 PetriNetUnfolderBase]: For 276263/276275 co-relation queries the response was YES. [2024-06-14 11:20:45,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23112 conditions, 3371 events. 1987/3371 cut-off events. For 276263/276275 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 20626 event pairs, 292 based on Foata normal form. 18/3389 useless extension candidates. Maximal degree in co-relation 22958. Up to 2774 conditions per place. [2024-06-14 11:20:45,717 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 372 selfloop transitions, 57 changer transitions 0/435 dead transitions. [2024-06-14 11:20:45,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 435 transitions, 5275 flow [2024-06-14 11:20:45,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:45,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 11:20:45,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 11:20:45,718 INFO L175 Difference]: Start difference. First operand has 329 places, 402 transitions, 4291 flow. Second operand 8 states and 180 transitions. [2024-06-14 11:20:45,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 435 transitions, 5275 flow [2024-06-14 11:20:46,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 435 transitions, 5146 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 11:20:46,847 INFO L231 Difference]: Finished difference. Result has 334 places, 405 transitions, 4318 flow [2024-06-14 11:20:46,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4318, PETRI_PLACES=334, PETRI_TRANSITIONS=405} [2024-06-14 11:20:46,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-14 11:20:46,847 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 405 transitions, 4318 flow [2024-06-14 11:20:46,847 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) [2024-06-14 11:20:46,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:46,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:46,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 11:20:46,848 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)] === [2024-06-14 11:20:46,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:46,848 INFO L85 PathProgramCache]: Analyzing trace with hash 768729253, now seen corresponding path program 1 times [2024-06-14 11:20:46,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:46,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478072109] [2024-06-14 11:20:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:46,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:46,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:46,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478072109] [2024-06-14 11:20:46,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478072109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:46,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:46,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:46,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924584846] [2024-06-14 11:20:46,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:46,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:46,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:46,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:46,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:47,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:47,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 405 transitions, 4318 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) [2024-06-14 11:20:47,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:47,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:47,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:47,675 INFO L124 PetriNetUnfolderBase]: 2099/3555 cut-off events. [2024-06-14 11:20:47,675 INFO L125 PetriNetUnfolderBase]: For 346230/346242 co-relation queries the response was YES. [2024-06-14 11:20:47,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25914 conditions, 3555 events. 2099/3555 cut-off events. For 346230/346242 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 22026 event pairs, 337 based on Foata normal form. 18/3573 useless extension candidates. Maximal degree in co-relation 25758. Up to 2502 conditions per place. [2024-06-14 11:20:47,715 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 340 selfloop transitions, 102 changer transitions 0/448 dead transitions. [2024-06-14 11:20:47,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 448 transitions, 5828 flow [2024-06-14 11:20:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:47,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:47,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 11:20:47,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 11:20:47,716 INFO L175 Difference]: Start difference. First operand has 334 places, 405 transitions, 4318 flow. Second operand 10 states and 225 transitions. [2024-06-14 11:20:47,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 448 transitions, 5828 flow [2024-06-14 11:20:48,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 448 transitions, 5710 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:48,963 INFO L231 Difference]: Finished difference. Result has 339 places, 408 transitions, 4482 flow [2024-06-14 11:20:48,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4200, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4482, PETRI_PLACES=339, PETRI_TRANSITIONS=408} [2024-06-14 11:20:48,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-14 11:20:48,964 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 408 transitions, 4482 flow [2024-06-14 11:20:48,964 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) [2024-06-14 11:20:48,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:48,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:48,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 11:20:48,965 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)] === [2024-06-14 11:20:48,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:48,965 INFO L85 PathProgramCache]: Analyzing trace with hash 945860587, now seen corresponding path program 3 times [2024-06-14 11:20:48,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:48,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513700150] [2024-06-14 11:20:48,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:48,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:49,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:49,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513700150] [2024-06-14 11:20:49,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513700150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:49,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:49,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:49,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944079605] [2024-06-14 11:20:49,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:49,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:49,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:49,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:49,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 408 transitions, 4482 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) [2024-06-14 11:20:49,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:49,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:49,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:49,818 INFO L124 PetriNetUnfolderBase]: 2176/3682 cut-off events. [2024-06-14 11:20:49,818 INFO L125 PetriNetUnfolderBase]: For 379702/379714 co-relation queries the response was YES. [2024-06-14 11:20:49,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27381 conditions, 3682 events. 2176/3682 cut-off events. For 379702/379714 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 22994 event pairs, 318 based on Foata normal form. 18/3700 useless extension candidates. Maximal degree in co-relation 27224. Up to 2988 conditions per place. [2024-06-14 11:20:49,856 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 377 selfloop transitions, 65 changer transitions 0/448 dead transitions. [2024-06-14 11:20:49,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 448 transitions, 5738 flow [2024-06-14 11:20:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:20:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:20:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 11:20:49,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-14 11:20:49,857 INFO L175 Difference]: Start difference. First operand has 339 places, 408 transitions, 4482 flow. Second operand 9 states and 196 transitions. [2024-06-14 11:20:49,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 448 transitions, 5738 flow [2024-06-14 11:20:50,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 448 transitions, 5626 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:50,908 INFO L231 Difference]: Finished difference. Result has 344 places, 416 transitions, 4597 flow [2024-06-14 11:20:50,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4370, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4597, PETRI_PLACES=344, PETRI_TRANSITIONS=416} [2024-06-14 11:20:50,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-14 11:20:50,908 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 416 transitions, 4597 flow [2024-06-14 11:20:50,908 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) [2024-06-14 11:20:50,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:50,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:50,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 11:20:50,908 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)] === [2024-06-14 11:20:50,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:50,909 INFO L85 PathProgramCache]: Analyzing trace with hash 945860773, now seen corresponding path program 2 times [2024-06-14 11:20:50,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:50,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711539560] [2024-06-14 11:20:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:50,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:51,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:51,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711539560] [2024-06-14 11:20:51,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711539560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:51,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:51,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:51,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880325176] [2024-06-14 11:20:51,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:51,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:51,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:51,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:51,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:51,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:51,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 416 transitions, 4597 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) [2024-06-14 11:20:51,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:51,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:51,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:51,766 INFO L124 PetriNetUnfolderBase]: 2262/3820 cut-off events. [2024-06-14 11:20:51,767 INFO L125 PetriNetUnfolderBase]: For 438436/438448 co-relation queries the response was YES. [2024-06-14 11:20:51,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29802 conditions, 3820 events. 2262/3820 cut-off events. For 438436/438448 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 23912 event pairs, 360 based on Foata normal form. 18/3838 useless extension candidates. Maximal degree in co-relation 29642. Up to 2645 conditions per place. [2024-06-14 11:20:51,810 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 349 selfloop transitions, 103 changer transitions 0/458 dead transitions. [2024-06-14 11:20:51,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 458 transitions, 6317 flow [2024-06-14 11:20:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:51,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-14 11:20:51,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-14 11:20:51,811 INFO L175 Difference]: Start difference. First operand has 344 places, 416 transitions, 4597 flow. Second operand 10 states and 224 transitions. [2024-06-14 11:20:51,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 458 transitions, 6317 flow [2024-06-14 11:20:53,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 458 transitions, 6199 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 11:20:53,170 INFO L231 Difference]: Finished difference. Result has 350 places, 419 transitions, 4767 flow [2024-06-14 11:20:53,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4479, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4767, PETRI_PLACES=350, PETRI_TRANSITIONS=419} [2024-06-14 11:20:53,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-14 11:20:53,171 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 419 transitions, 4767 flow [2024-06-14 11:20:53,171 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) [2024-06-14 11:20:53,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:53,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:53,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 11:20:53,171 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)] === [2024-06-14 11:20:53,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:53,171 INFO L85 PathProgramCache]: Analyzing trace with hash 946097923, now seen corresponding path program 3 times [2024-06-14 11:20:53,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:53,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234399736] [2024-06-14 11:20:53,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:53,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:53,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:53,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234399736] [2024-06-14 11:20:53,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234399736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:53,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:53,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:53,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842073897] [2024-06-14 11:20:53,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:53,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:53,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:53,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:53,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:53,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:53,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 419 transitions, 4767 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) [2024-06-14 11:20:53,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:53,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:53,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:54,077 INFO L124 PetriNetUnfolderBase]: 2249/3801 cut-off events. [2024-06-14 11:20:54,077 INFO L125 PetriNetUnfolderBase]: For 423965/423977 co-relation queries the response was YES. [2024-06-14 11:20:54,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29290 conditions, 3801 events. 2249/3801 cut-off events. For 423965/423977 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 23736 event pairs, 360 based on Foata normal form. 18/3819 useless extension candidates. Maximal degree in co-relation 29130. Up to 2639 conditions per place. [2024-06-14 11:20:54,119 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 343 selfloop transitions, 106 changer transitions 0/455 dead transitions. [2024-06-14 11:20:54,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 455 transitions, 6199 flow [2024-06-14 11:20:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:20:54,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:20:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-14 11:20:54,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-14 11:20:54,120 INFO L175 Difference]: Start difference. First operand has 350 places, 419 transitions, 4767 flow. Second operand 10 states and 221 transitions. [2024-06-14 11:20:54,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 455 transitions, 6199 flow [2024-06-14 11:20:55,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 455 transitions, 6033 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 11:20:55,469 INFO L231 Difference]: Finished difference. Result has 355 places, 419 transitions, 4817 flow [2024-06-14 11:20:55,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4601, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4817, PETRI_PLACES=355, PETRI_TRANSITIONS=419} [2024-06-14 11:20:55,469 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-14 11:20:55,469 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 419 transitions, 4817 flow [2024-06-14 11:20:55,470 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) [2024-06-14 11:20:55,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:55,470 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, 1] [2024-06-14 11:20:55,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 11:20:55,470 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)] === [2024-06-14 11:20:55,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:55,470 INFO L85 PathProgramCache]: Analyzing trace with hash 123061607, now seen corresponding path program 4 times [2024-06-14 11:20:55,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:55,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099691248] [2024-06-14 11:20:55,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:55,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:55,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:55,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099691248] [2024-06-14 11:20:55,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099691248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:55,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:55,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:55,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866314088] [2024-06-14 11:20:55,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:55,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:55,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:55,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:55,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:55,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:55,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 419 transitions, 4817 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) [2024-06-14 11:20:55,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:55,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:55,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:56,333 INFO L124 PetriNetUnfolderBase]: 2323/3912 cut-off events. [2024-06-14 11:20:56,333 INFO L125 PetriNetUnfolderBase]: For 478066/478074 co-relation queries the response was YES. [2024-06-14 11:20:56,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30892 conditions, 3912 events. 2323/3912 cut-off events. For 478066/478074 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24590 event pairs, 553 based on Foata normal form. 16/3925 useless extension candidates. Maximal degree in co-relation 30731. Up to 3162 conditions per place. [2024-06-14 11:20:56,380 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 356 selfloop transitions, 95 changer transitions 0/457 dead transitions. [2024-06-14 11:20:56,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 457 transitions, 6109 flow [2024-06-14 11:20:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:56,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 11:20:56,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 11:20:56,381 INFO L175 Difference]: Start difference. First operand has 355 places, 419 transitions, 4817 flow. Second operand 8 states and 189 transitions. [2024-06-14 11:20:56,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 457 transitions, 6109 flow [2024-06-14 11:20:57,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 457 transitions, 5899 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:20:57,871 INFO L231 Difference]: Finished difference. Result has 355 places, 421 transitions, 4843 flow [2024-06-14 11:20:57,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4843, PETRI_PLACES=355, PETRI_TRANSITIONS=421} [2024-06-14 11:20:57,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-14 11:20:57,871 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 421 transitions, 4843 flow [2024-06-14 11:20:57,871 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) [2024-06-14 11:20:57,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:20:57,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:20:57,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 11:20:57,871 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)] === [2024-06-14 11:20:57,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:20:57,872 INFO L85 PathProgramCache]: Analyzing trace with hash 131632487, now seen corresponding path program 5 times [2024-06-14 11:20:57,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:20:57,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912858963] [2024-06-14 11:20:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:20:57,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:20:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:20:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:20:58,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:20:58,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912858963] [2024-06-14 11:20:58,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912858963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:20:58,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:20:58,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:20:58,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25255453] [2024-06-14 11:20:58,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:20:58,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:20:58,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:20:58,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:20:58,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:20:58,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:20:58,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 421 transitions, 4843 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) [2024-06-14 11:20:58,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:20:58,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:20:58,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:20:58,738 INFO L124 PetriNetUnfolderBase]: 2351/3958 cut-off events. [2024-06-14 11:20:58,738 INFO L125 PetriNetUnfolderBase]: For 487745/487753 co-relation queries the response was YES. [2024-06-14 11:20:58,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31252 conditions, 3958 events. 2351/3958 cut-off events. For 487745/487753 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 24919 event pairs, 575 based on Foata normal form. 16/3973 useless extension candidates. Maximal degree in co-relation 31090. Up to 3372 conditions per place. [2024-06-14 11:20:58,785 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 350 selfloop transitions, 94 changer transitions 0/450 dead transitions. [2024-06-14 11:20:58,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 450 transitions, 5861 flow [2024-06-14 11:20:58,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:20:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:20:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 11:20:58,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 11:20:58,786 INFO L175 Difference]: Start difference. First operand has 355 places, 421 transitions, 4843 flow. Second operand 8 states and 182 transitions. [2024-06-14 11:20:58,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 450 transitions, 5861 flow [2024-06-14 11:21:00,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 450 transitions, 5737 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:21:00,350 INFO L231 Difference]: Finished difference. Result has 359 places, 422 transitions, 4936 flow [2024-06-14 11:21:00,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4936, PETRI_PLACES=359, PETRI_TRANSITIONS=422} [2024-06-14 11:21:00,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-14 11:21:00,350 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 422 transitions, 4936 flow [2024-06-14 11:21:00,350 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) [2024-06-14 11:21:00,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:00,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:00,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 11:21:00,350 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)] === [2024-06-14 11:21:00,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:00,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1793947023, now seen corresponding path program 6 times [2024-06-14 11:21:00,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:00,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523230651] [2024-06-14 11:21:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:00,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:00,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:00,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523230651] [2024-06-14 11:21:00,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523230651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:00,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:00,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:00,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341258437] [2024-06-14 11:21:00,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:00,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:00,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:00,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:00,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:00,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:00,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 422 transitions, 4936 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) [2024-06-14 11:21:00,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:00,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:00,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:01,228 INFO L124 PetriNetUnfolderBase]: 2437/4094 cut-off events. [2024-06-14 11:21:01,228 INFO L125 PetriNetUnfolderBase]: For 544207/544215 co-relation queries the response was YES. [2024-06-14 11:21:01,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33429 conditions, 4094 events. 2437/4094 cut-off events. For 544207/544215 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 25871 event pairs, 562 based on Foata normal form. 14/4101 useless extension candidates. Maximal degree in co-relation 33265. Up to 3101 conditions per place. [2024-06-14 11:21:01,280 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 358 selfloop transitions, 100 changer transitions 0/464 dead transitions. [2024-06-14 11:21:01,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 464 transitions, 6456 flow [2024-06-14 11:21:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:21:01,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:21:01,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 11:21:01,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:21:01,280 INFO L175 Difference]: Start difference. First operand has 359 places, 422 transitions, 4936 flow. Second operand 8 states and 192 transitions. [2024-06-14 11:21:01,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 464 transitions, 6456 flow [2024-06-14 11:21:03,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 464 transitions, 6267 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:21:03,133 INFO L231 Difference]: Finished difference. Result has 362 places, 425 transitions, 5021 flow [2024-06-14 11:21:03,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4747, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5021, PETRI_PLACES=362, PETRI_TRANSITIONS=425} [2024-06-14 11:21:03,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-14 11:21:03,133 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 425 transitions, 5021 flow [2024-06-14 11:21:03,133 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) [2024-06-14 11:21:03,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:03,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:03,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 11:21:03,133 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)] === [2024-06-14 11:21:03,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:03,134 INFO L85 PathProgramCache]: Analyzing trace with hash -18921493, now seen corresponding path program 7 times [2024-06-14 11:21:03,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:03,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763614293] [2024-06-14 11:21:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:03,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:03,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:03,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763614293] [2024-06-14 11:21:03,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763614293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:03,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:03,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:03,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413416116] [2024-06-14 11:21:03,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:03,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:03,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:03,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:03,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:03,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:03,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 425 transitions, 5021 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) [2024-06-14 11:21:03,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:03,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:03,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:04,078 INFO L124 PetriNetUnfolderBase]: 2424/4071 cut-off events. [2024-06-14 11:21:04,078 INFO L125 PetriNetUnfolderBase]: For 528592/528604 co-relation queries the response was YES. [2024-06-14 11:21:04,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33044 conditions, 4071 events. 2424/4071 cut-off events. For 528592/528604 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 25704 event pairs, 572 based on Foata normal form. 18/4078 useless extension candidates. Maximal degree in co-relation 32878. Up to 3576 conditions per place. [2024-06-14 11:21:04,128 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 401 selfloop transitions, 47 changer transitions 0/454 dead transitions. [2024-06-14 11:21:04,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 454 transitions, 6005 flow [2024-06-14 11:21:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:21:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:21:04,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 11:21:04,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 11:21:04,129 INFO L175 Difference]: Start difference. First operand has 362 places, 425 transitions, 5021 flow. Second operand 8 states and 179 transitions. [2024-06-14 11:21:04,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 454 transitions, 6005 flow [2024-06-14 11:21:05,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 454 transitions, 5792 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 11:21:05,737 INFO L231 Difference]: Finished difference. Result has 365 places, 425 transitions, 4906 flow [2024-06-14 11:21:05,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4808, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4906, PETRI_PLACES=365, PETRI_TRANSITIONS=425} [2024-06-14 11:21:05,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-14 11:21:05,737 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 425 transitions, 4906 flow [2024-06-14 11:21:05,737 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) [2024-06-14 11:21:05,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:05,737 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, 1, 1] [2024-06-14 11:21:05,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 11:21:05,737 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)] === [2024-06-14 11:21:05,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:05,738 INFO L85 PathProgramCache]: Analyzing trace with hash -18921307, now seen corresponding path program 4 times [2024-06-14 11:21:05,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:05,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023606006] [2024-06-14 11:21:05,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:05,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:05,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:05,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023606006] [2024-06-14 11:21:05,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023606006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:05,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:05,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:05,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221046922] [2024-06-14 11:21:05,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:05,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:05,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:05,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:05,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:05,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:05,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 425 transitions, 4906 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) [2024-06-14 11:21:05,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:05,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:05,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:06,756 INFO L124 PetriNetUnfolderBase]: 2490/4179 cut-off events. [2024-06-14 11:21:06,756 INFO L125 PetriNetUnfolderBase]: For 574266/574278 co-relation queries the response was YES. [2024-06-14 11:21:06,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34413 conditions, 4179 events. 2490/4179 cut-off events. For 574266/574278 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26511 event pairs, 592 based on Foata normal form. 18/4188 useless extension candidates. Maximal degree in co-relation 34246. Up to 3552 conditions per place. [2024-06-14 11:21:06,803 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 364 selfloop transitions, 93 changer transitions 0/463 dead transitions. [2024-06-14 11:21:06,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 463 transitions, 6213 flow [2024-06-14 11:21:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:21:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:21:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-14 11:21:06,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254988913525499 [2024-06-14 11:21:06,804 INFO L175 Difference]: Start difference. First operand has 365 places, 425 transitions, 4906 flow. Second operand 11 states and 237 transitions. [2024-06-14 11:21:06,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 463 transitions, 6213 flow [2024-06-14 11:21:08,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 463 transitions, 6117 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:21:08,624 INFO L231 Difference]: Finished difference. Result has 372 places, 427 transitions, 5075 flow [2024-06-14 11:21:08,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4810, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5075, PETRI_PLACES=372, PETRI_TRANSITIONS=427} [2024-06-14 11:21:08,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-14 11:21:08,625 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 427 transitions, 5075 flow [2024-06-14 11:21:08,625 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) [2024-06-14 11:21:08,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:08,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:08,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 11:21:08,625 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)] === [2024-06-14 11:21:08,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:08,626 INFO L85 PathProgramCache]: Analyzing trace with hash 246923657, now seen corresponding path program 8 times [2024-06-14 11:21:08,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:08,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743951915] [2024-06-14 11:21:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:08,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:08,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:08,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743951915] [2024-06-14 11:21:08,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743951915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:08,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:08,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:08,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136979749] [2024-06-14 11:21:08,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:08,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:08,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:08,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:08,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:08,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:08,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 427 transitions, 5075 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) [2024-06-14 11:21:08,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:08,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:08,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:09,570 INFO L124 PetriNetUnfolderBase]: 2518/4232 cut-off events. [2024-06-14 11:21:09,570 INFO L125 PetriNetUnfolderBase]: For 597707/597719 co-relation queries the response was YES. [2024-06-14 11:21:09,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35028 conditions, 4232 events. 2518/4232 cut-off events. For 597707/597719 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 26943 event pairs, 613 based on Foata normal form. 20/4252 useless extension candidates. Maximal degree in co-relation 34859. Up to 3747 conditions per place. [2024-06-14 11:21:09,622 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 402 selfloop transitions, 45 changer transitions 0/453 dead transitions. [2024-06-14 11:21:09,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 453 transitions, 6089 flow [2024-06-14 11:21:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:21:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:21:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 11:21:09,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:21:09,623 INFO L175 Difference]: Start difference. First operand has 372 places, 427 transitions, 5075 flow. Second operand 8 states and 176 transitions. [2024-06-14 11:21:09,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 453 transitions, 6089 flow [2024-06-14 11:21:11,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 453 transitions, 5917 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 11:21:11,522 INFO L231 Difference]: Finished difference. Result has 372 places, 428 transitions, 5020 flow [2024-06-14 11:21:11,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4903, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5020, PETRI_PLACES=372, PETRI_TRANSITIONS=428} [2024-06-14 11:21:11,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-14 11:21:11,522 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 428 transitions, 5020 flow [2024-06-14 11:21:11,522 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) [2024-06-14 11:21:11,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:11,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:11,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 11:21:11,523 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)] === [2024-06-14 11:21:11,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:11,523 INFO L85 PathProgramCache]: Analyzing trace with hash 247102403, now seen corresponding path program 5 times [2024-06-14 11:21:11,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:11,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791887128] [2024-06-14 11:21:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:11,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:11,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:11,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791887128] [2024-06-14 11:21:11,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791887128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:11,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:11,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:11,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600473909] [2024-06-14 11:21:11,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:11,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:11,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:11,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:11,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:11,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:11,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 428 transitions, 5020 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) [2024-06-14 11:21:11,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:11,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:11,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:12,497 INFO L124 PetriNetUnfolderBase]: 2546/4276 cut-off events. [2024-06-14 11:21:12,497 INFO L125 PetriNetUnfolderBase]: For 609318/609330 co-relation queries the response was YES. [2024-06-14 11:21:12,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35426 conditions, 4276 events. 2546/4276 cut-off events. For 609318/609330 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 27234 event pairs, 617 based on Foata normal form. 20/4296 useless extension candidates. Maximal degree in co-relation 35256. Up to 3742 conditions per place. [2024-06-14 11:21:12,550 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 363 selfloop transitions, 88 changer transitions 0/457 dead transitions. [2024-06-14 11:21:12,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 457 transitions, 6061 flow [2024-06-14 11:21:12,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:21:12,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:21:12,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-14 11:21:12,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099778270509978 [2024-06-14 11:21:12,552 INFO L175 Difference]: Start difference. First operand has 372 places, 428 transitions, 5020 flow. Second operand 11 states and 230 transitions. [2024-06-14 11:21:12,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 457 transitions, 6061 flow [2024-06-14 11:21:14,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 457 transitions, 5968 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:21:14,352 INFO L231 Difference]: Finished difference. Result has 377 places, 429 transitions, 5139 flow [2024-06-14 11:21:14,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5139, PETRI_PLACES=377, PETRI_TRANSITIONS=429} [2024-06-14 11:21:14,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-14 11:21:14,353 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 429 transitions, 5139 flow [2024-06-14 11:21:14,353 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) [2024-06-14 11:21:14,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:14,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:14,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 11:21:14,354 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)] === [2024-06-14 11:21:14,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:14,354 INFO L85 PathProgramCache]: Analyzing trace with hash -11512183, now seen corresponding path program 9 times [2024-06-14 11:21:14,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:14,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232177236] [2024-06-14 11:21:14,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:14,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:14,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:14,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232177236] [2024-06-14 11:21:14,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232177236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:14,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:14,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:14,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973913087] [2024-06-14 11:21:14,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:14,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:14,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:14,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:14,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:14,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:14,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 429 transitions, 5139 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) [2024-06-14 11:21:14,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:14,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:14,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:15,404 INFO L124 PetriNetUnfolderBase]: 2574/4326 cut-off events. [2024-06-14 11:21:15,405 INFO L125 PetriNetUnfolderBase]: For 613175/613187 co-relation queries the response was YES. [2024-06-14 11:21:15,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35899 conditions, 4326 events. 2574/4326 cut-off events. For 613175/613187 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 27624 event pairs, 617 based on Foata normal form. 18/4342 useless extension candidates. Maximal degree in co-relation 35728. Up to 3805 conditions per place. [2024-06-14 11:21:15,453 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 407 selfloop transitions, 48 changer transitions 0/461 dead transitions. [2024-06-14 11:21:15,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 461 transitions, 6218 flow [2024-06-14 11:21:15,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:21:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:21:15,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 11:21:15,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 11:21:15,454 INFO L175 Difference]: Start difference. First operand has 377 places, 429 transitions, 5139 flow. Second operand 9 states and 195 transitions. [2024-06-14 11:21:15,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 461 transitions, 6218 flow [2024-06-14 11:21:17,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 461 transitions, 6035 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 11:21:17,388 INFO L231 Difference]: Finished difference. Result has 378 places, 432 transitions, 5111 flow [2024-06-14 11:21:17,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4956, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5111, PETRI_PLACES=378, PETRI_TRANSITIONS=432} [2024-06-14 11:21:17,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-14 11:21:17,389 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 432 transitions, 5111 flow [2024-06-14 11:21:17,389 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) [2024-06-14 11:21:17,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:17,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:17,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 11:21:17,389 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)] === [2024-06-14 11:21:17,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:17,390 INFO L85 PathProgramCache]: Analyzing trace with hash 246775973, now seen corresponding path program 6 times [2024-06-14 11:21:17,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:17,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068684470] [2024-06-14 11:21:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:17,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:17,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:17,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068684470] [2024-06-14 11:21:17,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068684470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:17,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:17,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:17,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22892206] [2024-06-14 11:21:17,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:17,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:17,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:17,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:17,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:17,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:17,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 432 transitions, 5111 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) [2024-06-14 11:21:17,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:17,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:17,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:18,430 INFO L124 PetriNetUnfolderBase]: 2594/4358 cut-off events. [2024-06-14 11:21:18,430 INFO L125 PetriNetUnfolderBase]: For 624888/624900 co-relation queries the response was YES. [2024-06-14 11:21:18,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36209 conditions, 4358 events. 2594/4358 cut-off events. For 624888/624900 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27868 event pairs, 621 based on Foata normal form. 18/4374 useless extension candidates. Maximal degree in co-relation 36036. Up to 3788 conditions per place. [2024-06-14 11:21:18,488 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 368 selfloop transitions, 91 changer transitions 0/465 dead transitions. [2024-06-14 11:21:18,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 465 transitions, 6200 flow [2024-06-14 11:21:18,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:21:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:21:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-14 11:21:18,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-14 11:21:18,489 INFO L175 Difference]: Start difference. First operand has 378 places, 432 transitions, 5111 flow. Second operand 12 states and 249 transitions. [2024-06-14 11:21:18,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 465 transitions, 6200 flow [2024-06-14 11:21:20,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 465 transitions, 6102 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 11:21:20,630 INFO L231 Difference]: Finished difference. Result has 384 places, 433 transitions, 5232 flow [2024-06-14 11:21:20,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5013, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5232, PETRI_PLACES=384, PETRI_TRANSITIONS=433} [2024-06-14 11:21:20,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-14 11:21:20,631 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 433 transitions, 5232 flow [2024-06-14 11:21:20,631 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) [2024-06-14 11:21:20,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:20,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:20,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 11:21:20,631 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)] === [2024-06-14 11:21:20,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:20,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1103154527, now seen corresponding path program 7 times [2024-06-14 11:21:20,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:20,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584940217] [2024-06-14 11:21:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:20,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:20,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:20,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584940217] [2024-06-14 11:21:20,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584940217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:20,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:20,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:20,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324186332] [2024-06-14 11:21:20,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:20,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:20,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:20,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:20,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:20,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:20,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 433 transitions, 5232 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) [2024-06-14 11:21:20,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:20,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:20,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:21,690 INFO L124 PetriNetUnfolderBase]: 2714/4548 cut-off events. [2024-06-14 11:21:21,690 INFO L125 PetriNetUnfolderBase]: For 731907/731919 co-relation queries the response was YES. [2024-06-14 11:21:21,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39608 conditions, 4548 events. 2714/4548 cut-off events. For 731907/731919 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 29256 event pairs, 655 based on Foata normal form. 20/4568 useless extension candidates. Maximal degree in co-relation 39434. Up to 3822 conditions per place. [2024-06-14 11:21:21,750 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 371 selfloop transitions, 88 changer transitions 0/465 dead transitions. [2024-06-14 11:21:21,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 465 transitions, 6595 flow [2024-06-14 11:21:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:21:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:21:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 11:21:21,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 11:21:21,751 INFO L175 Difference]: Start difference. First operand has 384 places, 433 transitions, 5232 flow. Second operand 10 states and 215 transitions. [2024-06-14 11:21:21,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 465 transitions, 6595 flow [2024-06-14 11:21:24,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 465 transitions, 6407 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 11:21:24,223 INFO L231 Difference]: Finished difference. Result has 386 places, 436 transitions, 5333 flow [2024-06-14 11:21:24,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5333, PETRI_PLACES=386, PETRI_TRANSITIONS=436} [2024-06-14 11:21:24,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-14 11:21:24,224 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 436 transitions, 5333 flow [2024-06-14 11:21:24,224 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) [2024-06-14 11:21:24,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:24,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:24,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 11:21:24,224 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)] === [2024-06-14 11:21:24,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:24,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1100297567, now seen corresponding path program 8 times [2024-06-14 11:21:24,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:24,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118842070] [2024-06-14 11:21:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:24,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:24,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:24,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118842070] [2024-06-14 11:21:24,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118842070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:24,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:24,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:24,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959809329] [2024-06-14 11:21:24,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:24,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:24,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:24,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:24,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:24,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:24,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 436 transitions, 5333 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) [2024-06-14 11:21:24,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:24,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:24,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:25,299 INFO L124 PetriNetUnfolderBase]: 2742/4592 cut-off events. [2024-06-14 11:21:25,300 INFO L125 PetriNetUnfolderBase]: For 749999/750011 co-relation queries the response was YES. [2024-06-14 11:21:25,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40329 conditions, 4592 events. 2742/4592 cut-off events. For 749999/750011 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 29671 event pairs, 675 based on Foata normal form. 20/4612 useless extension candidates. Maximal degree in co-relation 40153. Up to 4046 conditions per place. [2024-06-14 11:21:25,361 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 370 selfloop transitions, 85 changer transitions 0/461 dead transitions. [2024-06-14 11:21:25,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 461 transitions, 6379 flow [2024-06-14 11:21:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:21:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:21:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-14 11:21:25,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-14 11:21:25,362 INFO L175 Difference]: Start difference. First operand has 386 places, 436 transitions, 5333 flow. Second operand 10 states and 211 transitions. [2024-06-14 11:21:25,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 461 transitions, 6379 flow [2024-06-14 11:21:27,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 461 transitions, 6202 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 11:21:27,704 INFO L231 Difference]: Finished difference. Result has 389 places, 437 transitions, 5369 flow [2024-06-14 11:21:27,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5369, PETRI_PLACES=389, PETRI_TRANSITIONS=437} [2024-06-14 11:21:27,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-14 11:21:27,705 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 437 transitions, 5369 flow [2024-06-14 11:21:27,705 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) [2024-06-14 11:21:27,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:27,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:27,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 11:21:27,705 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)] === [2024-06-14 11:21:27,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:27,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2069416019, now seen corresponding path program 10 times [2024-06-14 11:21:27,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:27,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672304538] [2024-06-14 11:21:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:27,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:27,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:27,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672304538] [2024-06-14 11:21:27,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672304538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:27,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:27,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:27,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805359759] [2024-06-14 11:21:27,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:27,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:27,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:27,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:27,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:27,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:27,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 437 transitions, 5369 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) [2024-06-14 11:21:27,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:27,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:27,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:28,848 INFO L124 PetriNetUnfolderBase]: 2770/4636 cut-off events. [2024-06-14 11:21:28,848 INFO L125 PetriNetUnfolderBase]: For 764773/764785 co-relation queries the response was YES. [2024-06-14 11:21:28,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40624 conditions, 4636 events. 2770/4636 cut-off events. For 764773/764785 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 30017 event pairs, 679 based on Foata normal form. 20/4656 useless extension candidates. Maximal degree in co-relation 40447. Up to 4133 conditions per place. [2024-06-14 11:21:28,898 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 404 selfloop transitions, 51 changer transitions 0/461 dead transitions. [2024-06-14 11:21:28,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 461 transitions, 6395 flow [2024-06-14 11:21:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:21:28,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:21:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 11:21:28,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-14 11:21:28,899 INFO L175 Difference]: Start difference. First operand has 389 places, 437 transitions, 5369 flow. Second operand 9 states and 190 transitions. [2024-06-14 11:21:28,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 461 transitions, 6395 flow [2024-06-14 11:21:31,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 461 transitions, 6216 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 11:21:31,226 INFO L231 Difference]: Finished difference. Result has 390 places, 438 transitions, 5321 flow [2024-06-14 11:21:31,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5190, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5321, PETRI_PLACES=390, PETRI_TRANSITIONS=438} [2024-06-14 11:21:31,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-14 11:21:31,227 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 438 transitions, 5321 flow [2024-06-14 11:21:31,227 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) [2024-06-14 11:21:31,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:31,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:31,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 11:21:31,227 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)] === [2024-06-14 11:21:31,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:31,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1328525333, now seen corresponding path program 11 times [2024-06-14 11:21:31,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:31,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242804546] [2024-06-14 11:21:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:31,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:31,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:31,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242804546] [2024-06-14 11:21:31,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242804546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:31,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:31,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:31,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024649918] [2024-06-14 11:21:31,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:31,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:31,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:31,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:31,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:31,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:31,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 438 transitions, 5321 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) [2024-06-14 11:21:31,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:31,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:31,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:32,302 INFO L124 PetriNetUnfolderBase]: 2798/4682 cut-off events. [2024-06-14 11:21:32,302 INFO L125 PetriNetUnfolderBase]: For 767991/768003 co-relation queries the response was YES. [2024-06-14 11:21:32,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40927 conditions, 4682 events. 2798/4682 cut-off events. For 767991/768003 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30340 event pairs, 677 based on Foata normal form. 18/4698 useless extension candidates. Maximal degree in co-relation 40749. Up to 4147 conditions per place. [2024-06-14 11:21:32,364 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 408 selfloop transitions, 54 changer transitions 0/468 dead transitions. [2024-06-14 11:21:32,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 468 transitions, 6414 flow [2024-06-14 11:21:32,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:21:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:21:32,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-14 11:21:32,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097560975609756 [2024-06-14 11:21:32,365 INFO L175 Difference]: Start difference. First operand has 390 places, 438 transitions, 5321 flow. Second operand 10 states and 209 transitions. [2024-06-14 11:21:32,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 468 transitions, 6414 flow [2024-06-14 11:21:34,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 468 transitions, 6307 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 11:21:34,932 INFO L231 Difference]: Finished difference. Result has 394 places, 441 transitions, 5387 flow [2024-06-14 11:21:34,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5214, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5387, PETRI_PLACES=394, PETRI_TRANSITIONS=441} [2024-06-14 11:21:34,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-14 11:21:34,932 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 441 transitions, 5387 flow [2024-06-14 11:21:34,932 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) [2024-06-14 11:21:34,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:34,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:34,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 11:21:34,933 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)] === [2024-06-14 11:21:34,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:34,933 INFO L85 PathProgramCache]: Analyzing trace with hash -523489759, now seen corresponding path program 9 times [2024-06-14 11:21:34,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:34,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354130457] [2024-06-14 11:21:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:34,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:35,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:35,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354130457] [2024-06-14 11:21:35,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354130457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:35,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:35,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:35,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049687362] [2024-06-14 11:21:35,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:35,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:35,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:35,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:35,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:35,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:35,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 441 transitions, 5387 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) [2024-06-14 11:21:35,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:35,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:35,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:36,153 INFO L124 PetriNetUnfolderBase]: 2933/4891 cut-off events. [2024-06-14 11:21:36,153 INFO L125 PetriNetUnfolderBase]: For 883904/883916 co-relation queries the response was YES. [2024-06-14 11:21:36,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44623 conditions, 4891 events. 2933/4891 cut-off events. For 883904/883916 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 31818 event pairs, 677 based on Foata normal form. 18/4903 useless extension candidates. Maximal degree in co-relation 44443. Up to 3912 conditions per place. [2024-06-14 11:21:36,219 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 103 changer transitions 0/482 dead transitions. [2024-06-14 11:21:36,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 482 transitions, 7085 flow [2024-06-14 11:21:36,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:21:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:21:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-14 11:21:36,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-14 11:21:36,220 INFO L175 Difference]: Start difference. First operand has 394 places, 441 transitions, 5387 flow. Second operand 11 states and 235 transitions. [2024-06-14 11:21:36,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 482 transitions, 7085 flow [2024-06-14 11:21:38,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 482 transitions, 6969 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 11:21:38,988 INFO L231 Difference]: Finished difference. Result has 400 places, 449 transitions, 5697 flow [2024-06-14 11:21:38,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5271, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5697, PETRI_PLACES=400, PETRI_TRANSITIONS=449} [2024-06-14 11:21:38,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-14 11:21:38,989 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 449 transitions, 5697 flow [2024-06-14 11:21:38,989 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) [2024-06-14 11:21:38,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:38,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:38,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 11:21:38,989 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)] === [2024-06-14 11:21:38,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:38,989 INFO L85 PathProgramCache]: Analyzing trace with hash -523727095, now seen corresponding path program 12 times [2024-06-14 11:21:38,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:38,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395313349] [2024-06-14 11:21:38,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:38,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:39,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:39,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395313349] [2024-06-14 11:21:39,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395313349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:39,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:39,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:39,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895109037] [2024-06-14 11:21:39,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:39,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:39,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:39,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:39,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:39,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:39,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 449 transitions, 5697 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) [2024-06-14 11:21:39,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:39,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:39,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:40,256 INFO L124 PetriNetUnfolderBase]: 2999/4997 cut-off events. [2024-06-14 11:21:40,256 INFO L125 PetriNetUnfolderBase]: For 952916/952928 co-relation queries the response was YES. [2024-06-14 11:21:40,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46820 conditions, 4997 events. 2999/4997 cut-off events. For 952916/952928 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 32670 event pairs, 738 based on Foata normal form. 18/5005 useless extension candidates. Maximal degree in co-relation 46637. Up to 4298 conditions per place. [2024-06-14 11:21:40,322 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 411 selfloop transitions, 62 changer transitions 0/479 dead transitions. [2024-06-14 11:21:40,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 479 transitions, 7017 flow [2024-06-14 11:21:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:21:40,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:21:40,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 11:21:40,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-14 11:21:40,323 INFO L175 Difference]: Start difference. First operand has 400 places, 449 transitions, 5697 flow. Second operand 9 states and 194 transitions. [2024-06-14 11:21:40,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 479 transitions, 7017 flow [2024-06-14 11:21:43,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 479 transitions, 6880 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 11:21:43,359 INFO L231 Difference]: Finished difference. Result has 404 places, 451 transitions, 5752 flow [2024-06-14 11:21:43,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5560, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5752, PETRI_PLACES=404, PETRI_TRANSITIONS=451} [2024-06-14 11:21:43,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-14 11:21:43,359 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 451 transitions, 5752 flow [2024-06-14 11:21:43,359 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) [2024-06-14 11:21:43,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:43,360 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, 1] [2024-06-14 11:21:43,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 11:21:43,360 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)] === [2024-06-14 11:21:43,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:43,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1328525147, now seen corresponding path program 10 times [2024-06-14 11:21:43,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:43,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502161578] [2024-06-14 11:21:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:43,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:43,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:43,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502161578] [2024-06-14 11:21:43,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502161578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:43,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:43,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:43,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375701219] [2024-06-14 11:21:43,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:43,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:43,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:43,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:43,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:43,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:43,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 451 transitions, 5752 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) [2024-06-14 11:21:43,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:43,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:43,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:44,544 INFO L124 PetriNetUnfolderBase]: 2986/4990 cut-off events. [2024-06-14 11:21:44,544 INFO L125 PetriNetUnfolderBase]: For 930692/930704 co-relation queries the response was YES. [2024-06-14 11:21:44,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46315 conditions, 4990 events. 2986/4990 cut-off events. For 930692/930704 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32775 event pairs, 743 based on Foata normal form. 18/5006 useless extension candidates. Maximal degree in co-relation 46129. Up to 4346 conditions per place. [2024-06-14 11:21:44,742 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 385 selfloop transitions, 90 changer transitions 0/481 dead transitions. [2024-06-14 11:21:44,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 481 transitions, 7050 flow [2024-06-14 11:21:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:21:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:21:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-14 11:21:44,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-14 11:21:44,743 INFO L175 Difference]: Start difference. First operand has 404 places, 451 transitions, 5752 flow. Second operand 12 states and 248 transitions. [2024-06-14 11:21:44,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 481 transitions, 7050 flow [2024-06-14 11:21:48,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 481 transitions, 6939 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:21:48,125 INFO L231 Difference]: Finished difference. Result has 411 places, 451 transitions, 5825 flow [2024-06-14 11:21:48,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5641, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5825, PETRI_PLACES=411, PETRI_TRANSITIONS=451} [2024-06-14 11:21:48,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-14 11:21:48,126 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 451 transitions, 5825 flow [2024-06-14 11:21:48,126 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) [2024-06-14 11:21:48,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:48,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:48,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 11:21:48,126 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)] === [2024-06-14 11:21:48,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:48,126 INFO L85 PathProgramCache]: Analyzing trace with hash -521843659, now seen corresponding path program 11 times [2024-06-14 11:21:48,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:48,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219112396] [2024-06-14 11:21:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:48,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:48,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:48,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219112396] [2024-06-14 11:21:48,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219112396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:48,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:48,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:48,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916523962] [2024-06-14 11:21:48,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:48,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:48,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:48,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:48,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:48,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:48,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 451 transitions, 5825 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) [2024-06-14 11:21:48,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:48,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:48,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:49,296 INFO L124 PetriNetUnfolderBase]: 2968/4962 cut-off events. [2024-06-14 11:21:49,297 INFO L125 PetriNetUnfolderBase]: For 912915/912927 co-relation queries the response was YES. [2024-06-14 11:21:49,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45318 conditions, 4962 events. 2968/4962 cut-off events. For 912915/912927 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32561 event pairs, 741 based on Foata normal form. 20/4982 useless extension candidates. Maximal degree in co-relation 45131. Up to 4400 conditions per place. [2024-06-14 11:21:49,366 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 385 selfloop transitions, 86 changer transitions 0/477 dead transitions. [2024-06-14 11:21:49,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 477 transitions, 6871 flow [2024-06-14 11:21:49,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:21:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:21:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 245 transitions. [2024-06-14 11:21:49,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49796747967479676 [2024-06-14 11:21:49,367 INFO L175 Difference]: Start difference. First operand has 411 places, 451 transitions, 5825 flow. Second operand 12 states and 245 transitions. [2024-06-14 11:21:49,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 477 transitions, 6871 flow [2024-06-14 11:21:53,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 477 transitions, 6678 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 11:21:53,049 INFO L231 Difference]: Finished difference. Result has 414 places, 451 transitions, 5809 flow [2024-06-14 11:21:53,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5632, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5809, PETRI_PLACES=414, PETRI_TRANSITIONS=451} [2024-06-14 11:21:53,049 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-14 11:21:53,049 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 451 transitions, 5809 flow [2024-06-14 11:21:53,049 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) [2024-06-14 11:21:53,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:53,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:53,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 11:21:53,050 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)] === [2024-06-14 11:21:53,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:53,050 INFO L85 PathProgramCache]: Analyzing trace with hash -523726909, now seen corresponding path program 12 times [2024-06-14 11:21:53,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:53,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810644073] [2024-06-14 11:21:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:53,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:53,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:53,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810644073] [2024-06-14 11:21:53,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810644073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:53,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:53,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:53,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050624456] [2024-06-14 11:21:53,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:53,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:53,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:53,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:53,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:53,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:53,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 451 transitions, 5809 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) [2024-06-14 11:21:53,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:53,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:53,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:54,204 INFO L124 PetriNetUnfolderBase]: 2955/4937 cut-off events. [2024-06-14 11:21:54,204 INFO L125 PetriNetUnfolderBase]: For 879624/879636 co-relation queries the response was YES. [2024-06-14 11:21:54,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44487 conditions, 4937 events. 2955/4937 cut-off events. For 879624/879636 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 32303 event pairs, 690 based on Foata normal form. 18/4947 useless extension candidates. Maximal degree in co-relation 44299. Up to 3994 conditions per place. [2024-06-14 11:21:54,274 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 377 selfloop transitions, 101 changer transitions 0/484 dead transitions. [2024-06-14 11:21:54,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 484 transitions, 7167 flow [2024-06-14 11:21:54,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:21:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:21:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-14 11:21:54,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-14 11:21:54,275 INFO L175 Difference]: Start difference. First operand has 414 places, 451 transitions, 5809 flow. Second operand 11 states and 235 transitions. [2024-06-14 11:21:54,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 484 transitions, 7167 flow [2024-06-14 11:21:57,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 484 transitions, 6996 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-14 11:21:57,878 INFO L231 Difference]: Finished difference. Result has 415 places, 451 transitions, 5844 flow [2024-06-14 11:21:57,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5844, PETRI_PLACES=415, PETRI_TRANSITIONS=451} [2024-06-14 11:21:57,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-14 11:21:57,879 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 451 transitions, 5844 flow [2024-06-14 11:21:57,879 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) [2024-06-14 11:21:57,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:21:57,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:21:57,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 11:21:57,879 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)] === [2024-06-14 11:21:57,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:21:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash -426455355, now seen corresponding path program 13 times [2024-06-14 11:21:57,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:21:57,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929496765] [2024-06-14 11:21:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:21:57,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:21:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:21:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:21:58,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:21:58,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929496765] [2024-06-14 11:21:58,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929496765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:21:58,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:21:58,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:21:58,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79823923] [2024-06-14 11:21:58,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:21:58,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:21:58,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:21:58,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:21:58,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:21:58,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:21:58,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 451 transitions, 5844 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) [2024-06-14 11:21:58,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:21:58,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:21:58,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:21:59,131 INFO L124 PetriNetUnfolderBase]: 3062/5111 cut-off events. [2024-06-14 11:21:59,131 INFO L125 PetriNetUnfolderBase]: For 998019/998027 co-relation queries the response was YES. [2024-06-14 11:21:59,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47561 conditions, 5111 events. 3062/5111 cut-off events. For 998019/998027 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 33651 event pairs, 776 based on Foata normal form. 16/5126 useless extension candidates. Maximal degree in co-relation 47372. Up to 4312 conditions per place. [2024-06-14 11:21:59,197 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 406 selfloop transitions, 74 changer transitions 0/486 dead transitions. [2024-06-14 11:21:59,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 486 transitions, 7250 flow [2024-06-14 11:21:59,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:21:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:21:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 11:21:59,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:21:59,198 INFO L175 Difference]: Start difference. First operand has 415 places, 451 transitions, 5844 flow. Second operand 7 states and 168 transitions. [2024-06-14 11:21:59,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 486 transitions, 7250 flow [2024-06-14 11:22:03,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 486 transitions, 7067 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:22:03,148 INFO L231 Difference]: Finished difference. Result has 415 places, 454 transitions, 5898 flow [2024-06-14 11:22:03,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5661, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5898, PETRI_PLACES=415, PETRI_TRANSITIONS=454} [2024-06-14 11:22:03,148 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-14 11:22:03,148 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 454 transitions, 5898 flow [2024-06-14 11:22:03,149 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) [2024-06-14 11:22:03,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:03,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:03,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 11:22:03,149 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)] === [2024-06-14 11:22:03,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash -564744495, now seen corresponding path program 14 times [2024-06-14 11:22:03,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:03,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897987666] [2024-06-14 11:22:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:03,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:03,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:03,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897987666] [2024-06-14 11:22:03,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897987666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:03,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:03,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:22:03,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238911547] [2024-06-14 11:22:03,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:03,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:22:03,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:03,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:22:03,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:22:03,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:03,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 454 transitions, 5898 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) [2024-06-14 11:22:03,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:03,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:03,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:04,424 INFO L124 PetriNetUnfolderBase]: 3090/5151 cut-off events. [2024-06-14 11:22:04,424 INFO L125 PetriNetUnfolderBase]: For 1016131/1016139 co-relation queries the response was YES. [2024-06-14 11:22:04,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48049 conditions, 5151 events. 3090/5151 cut-off events. For 1016131/1016139 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 33894 event pairs, 794 based on Foata normal form. 16/5166 useless extension candidates. Maximal degree in co-relation 47858. Up to 4564 conditions per place. [2024-06-14 11:22:04,485 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 401 selfloop transitions, 72 changer transitions 0/479 dead transitions. [2024-06-14 11:22:04,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 479 transitions, 6969 flow [2024-06-14 11:22:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:22:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:22:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 11:22:04,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:22:04,486 INFO L175 Difference]: Start difference. First operand has 415 places, 454 transitions, 5898 flow. Second operand 7 states and 161 transitions. [2024-06-14 11:22:04,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 479 transitions, 6969 flow [2024-06-14 11:22:08,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 479 transitions, 6859 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 11:22:08,218 INFO L231 Difference]: Finished difference. Result has 419 places, 455 transitions, 5966 flow [2024-06-14 11:22:08,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5794, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5966, PETRI_PLACES=419, PETRI_TRANSITIONS=455} [2024-06-14 11:22:08,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-14 11:22:08,219 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 455 transitions, 5966 flow [2024-06-14 11:22:08,219 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) [2024-06-14 11:22:08,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:08,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:08,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 11:22:08,219 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)] === [2024-06-14 11:22:08,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:08,219 INFO L85 PathProgramCache]: Analyzing trace with hash -568558425, now seen corresponding path program 15 times [2024-06-14 11:22:08,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:08,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170603848] [2024-06-14 11:22:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:08,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:08,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:08,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170603848] [2024-06-14 11:22:08,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170603848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:08,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:08,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:22:08,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593219738] [2024-06-14 11:22:08,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:08,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:22:08,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:08,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:22:08,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:22:08,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:08,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 455 transitions, 5966 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) [2024-06-14 11:22:08,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:08,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:08,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:09,541 INFO L124 PetriNetUnfolderBase]: 3143/5242 cut-off events. [2024-06-14 11:22:09,541 INFO L125 PetriNetUnfolderBase]: For 1057623/1057631 co-relation queries the response was YES. [2024-06-14 11:22:09,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49442 conditions, 5242 events. 3143/5242 cut-off events. For 1057623/1057631 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 34687 event pairs, 597 based on Foata normal form. 14/5255 useless extension candidates. Maximal degree in co-relation 49249. Up to 3931 conditions per place. [2024-06-14 11:22:09,623 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 395 selfloop transitions, 91 changer transitions 0/492 dead transitions. [2024-06-14 11:22:09,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 492 transitions, 7596 flow [2024-06-14 11:22:09,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:22:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:22:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:22:09,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 11:22:09,624 INFO L175 Difference]: Start difference. First operand has 419 places, 455 transitions, 5966 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:22:09,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 492 transitions, 7596 flow [2024-06-14 11:22:14,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 492 transitions, 7449 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:22:14,333 INFO L231 Difference]: Finished difference. Result has 421 places, 457 transitions, 6057 flow [2024-06-14 11:22:14,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5819, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6057, PETRI_PLACES=421, PETRI_TRANSITIONS=457} [2024-06-14 11:22:14,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-14 11:22:14,333 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 457 transitions, 6057 flow [2024-06-14 11:22:14,333 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) [2024-06-14 11:22:14,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:14,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:14,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 11:22:14,334 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)] === [2024-06-14 11:22:14,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:14,334 INFO L85 PathProgramCache]: Analyzing trace with hash 431824529, now seen corresponding path program 16 times [2024-06-14 11:22:14,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:14,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922769217] [2024-06-14 11:22:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:14,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:14,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:14,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922769217] [2024-06-14 11:22:14,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922769217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:14,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:14,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:22:14,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122280960] [2024-06-14 11:22:14,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:14,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:22:14,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:14,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:22:14,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:22:14,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:14,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 457 transitions, 6057 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) [2024-06-14 11:22:14,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:14,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:14,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:15,589 INFO L124 PetriNetUnfolderBase]: 3171/5283 cut-off events. [2024-06-14 11:22:15,589 INFO L125 PetriNetUnfolderBase]: For 1092533/1092545 co-relation queries the response was YES. [2024-06-14 11:22:15,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50161 conditions, 5283 events. 3171/5283 cut-off events. For 1092533/1092545 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 34884 event pairs, 792 based on Foata normal form. 20/5303 useless extension candidates. Maximal degree in co-relation 49967. Up to 4515 conditions per place. [2024-06-14 11:22:15,659 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 415 selfloop transitions, 77 changer transitions 0/498 dead transitions. [2024-06-14 11:22:15,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 498 transitions, 7471 flow [2024-06-14 11:22:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:22:15,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:22:15,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-14 11:22:15,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-14 11:22:15,660 INFO L175 Difference]: Start difference. First operand has 421 places, 457 transitions, 6057 flow. Second operand 9 states and 209 transitions. [2024-06-14 11:22:15,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 498 transitions, 7471 flow [2024-06-14 11:22:20,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 498 transitions, 7127 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 11:22:20,123 INFO L231 Difference]: Finished difference. Result has 423 places, 458 transitions, 5899 flow [2024-06-14 11:22:20,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5719, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5899, PETRI_PLACES=423, PETRI_TRANSITIONS=458} [2024-06-14 11:22:20,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-14 11:22:20,123 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 458 transitions, 5899 flow [2024-06-14 11:22:20,123 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) [2024-06-14 11:22:20,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:20,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:20,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 11:22:20,123 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)] === [2024-06-14 11:22:20,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:20,124 INFO L85 PathProgramCache]: Analyzing trace with hash -568438455, now seen corresponding path program 17 times [2024-06-14 11:22:20,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:20,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298601270] [2024-06-14 11:22:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:20,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:20,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:20,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298601270] [2024-06-14 11:22:20,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298601270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:20,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:20,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:22:20,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164156588] [2024-06-14 11:22:20,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:20,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:22:20,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:20,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:22:20,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:22:20,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:20,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 458 transitions, 5899 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) [2024-06-14 11:22:20,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:20,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:20,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:21,400 INFO L124 PetriNetUnfolderBase]: 3158/5268 cut-off events. [2024-06-14 11:22:21,400 INFO L125 PetriNetUnfolderBase]: For 1052391/1052403 co-relation queries the response was YES. [2024-06-14 11:22:21,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48537 conditions, 5268 events. 3158/5268 cut-off events. For 1052391/1052403 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34878 event pairs, 584 based on Foata normal form. 18/5286 useless extension candidates. Maximal degree in co-relation 48345. Up to 4688 conditions per place. [2024-06-14 11:22:21,469 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 431 selfloop transitions, 46 changer transitions 0/483 dead transitions. [2024-06-14 11:22:21,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 483 transitions, 6931 flow [2024-06-14 11:22:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:22:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:22:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 11:22:21,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 11:22:21,470 INFO L175 Difference]: Start difference. First operand has 423 places, 458 transitions, 5899 flow. Second operand 7 states and 160 transitions. [2024-06-14 11:22:21,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 483 transitions, 6931 flow [2024-06-14 11:22:25,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 483 transitions, 6671 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 11:22:25,616 INFO L231 Difference]: Finished difference. Result has 422 places, 458 transitions, 5735 flow [2024-06-14 11:22:25,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5639, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5735, PETRI_PLACES=422, PETRI_TRANSITIONS=458} [2024-06-14 11:22:25,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-14 11:22:25,616 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 458 transitions, 5735 flow [2024-06-14 11:22:25,617 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) [2024-06-14 11:22:25,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:25,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:25,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 11:22:25,617 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)] === [2024-06-14 11:22:25,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:25,617 INFO L85 PathProgramCache]: Analyzing trace with hash -568438269, now seen corresponding path program 13 times [2024-06-14 11:22:25,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:25,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505121414] [2024-06-14 11:22:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:25,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:25,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:25,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505121414] [2024-06-14 11:22:25,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505121414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:25,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:25,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:22:25,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684424661] [2024-06-14 11:22:25,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:25,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:22:25,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:25,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:22:25,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:22:25,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:25,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 458 transitions, 5735 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) [2024-06-14 11:22:25,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:25,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:25,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:26,886 INFO L124 PetriNetUnfolderBase]: 3145/5245 cut-off events. [2024-06-14 11:22:26,886 INFO L125 PetriNetUnfolderBase]: For 1028194/1028206 co-relation queries the response was YES. [2024-06-14 11:22:26,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47360 conditions, 5245 events. 3145/5245 cut-off events. For 1028194/1028206 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34711 event pairs, 568 based on Foata normal form. 18/5263 useless extension candidates. Maximal degree in co-relation 47168. Up to 4322 conditions per place. [2024-06-14 11:22:26,957 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 75 changer transitions 0/488 dead transitions. [2024-06-14 11:22:26,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 488 transitions, 7065 flow [2024-06-14 11:22:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:22:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:22:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 11:22:26,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-14 11:22:26,958 INFO L175 Difference]: Start difference. First operand has 422 places, 458 transitions, 5735 flow. Second operand 8 states and 185 transitions. [2024-06-14 11:22:26,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 488 transitions, 7065 flow [2024-06-14 11:22:30,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 488 transitions, 6953 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 11:22:30,695 INFO L231 Difference]: Finished difference. Result has 424 places, 458 transitions, 5779 flow [2024-06-14 11:22:30,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5623, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5779, PETRI_PLACES=424, PETRI_TRANSITIONS=458} [2024-06-14 11:22:30,695 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-14 11:22:30,696 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 458 transitions, 5779 flow [2024-06-14 11:22:30,696 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) [2024-06-14 11:22:30,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:30,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:30,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 11:22:30,696 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)] === [2024-06-14 11:22:30,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:30,696 INFO L85 PathProgramCache]: Analyzing trace with hash 440395409, now seen corresponding path program 18 times [2024-06-14 11:22:30,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:30,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810516789] [2024-06-14 11:22:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:30,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:30,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:30,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810516789] [2024-06-14 11:22:30,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810516789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:30,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:30,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:22:30,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725921265] [2024-06-14 11:22:30,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:30,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:22:30,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:30,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:22:30,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:22:30,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:30,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 458 transitions, 5779 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) [2024-06-14 11:22:30,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:30,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:30,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:31,902 INFO L124 PetriNetUnfolderBase]: 3173/5289 cut-off events. [2024-06-14 11:22:31,902 INFO L125 PetriNetUnfolderBase]: For 1062009/1062021 co-relation queries the response was YES. [2024-06-14 11:22:31,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47925 conditions, 5289 events. 3173/5289 cut-off events. For 1062009/1062021 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34996 event pairs, 798 based on Foata normal form. 20/5309 useless extension candidates. Maximal degree in co-relation 47732. Up to 4697 conditions per place. [2024-06-14 11:22:31,973 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 408 selfloop transitions, 77 changer transitions 0/491 dead transitions. [2024-06-14 11:22:31,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 491 transitions, 6883 flow [2024-06-14 11:22:31,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:22:31,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:22:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 11:22:31,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-14 11:22:31,974 INFO L175 Difference]: Start difference. First operand has 424 places, 458 transitions, 5779 flow. Second operand 9 states and 202 transitions. [2024-06-14 11:22:31,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 491 transitions, 6883 flow [2024-06-14 11:22:35,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 491 transitions, 6650 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 11:22:35,776 INFO L231 Difference]: Finished difference. Result has 424 places, 459 transitions, 5723 flow [2024-06-14 11:22:35,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5546, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5723, PETRI_PLACES=424, PETRI_TRANSITIONS=459} [2024-06-14 11:22:35,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-14 11:22:35,777 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 459 transitions, 5723 flow [2024-06-14 11:22:35,777 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) [2024-06-14 11:22:35,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:35,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:35,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 11:22:35,777 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)] === [2024-06-14 11:22:35,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:35,778 INFO L85 PathProgramCache]: Analyzing trace with hash -302414559, now seen corresponding path program 14 times [2024-06-14 11:22:35,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:35,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614202379] [2024-06-14 11:22:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:35,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:35,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:35,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614202379] [2024-06-14 11:22:35,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614202379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:35,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:35,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:22:35,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371983987] [2024-06-14 11:22:35,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:35,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:22:35,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:35,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:22:35,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:22:35,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:35,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 459 transitions, 5723 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) [2024-06-14 11:22:35,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:35,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:35,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:37,016 INFO L124 PetriNetUnfolderBase]: 3155/5267 cut-off events. [2024-06-14 11:22:37,016 INFO L125 PetriNetUnfolderBase]: For 1020669/1020681 co-relation queries the response was YES. [2024-06-14 11:22:37,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46577 conditions, 5267 events. 3155/5267 cut-off events. For 1020669/1020681 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34925 event pairs, 780 based on Foata normal form. 20/5287 useless extension candidates. Maximal degree in co-relation 46384. Up to 4701 conditions per place. [2024-06-14 11:22:37,089 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 416 selfloop transitions, 59 changer transitions 0/481 dead transitions. [2024-06-14 11:22:37,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 481 transitions, 6769 flow [2024-06-14 11:22:37,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:22:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:22:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 11:22:37,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 11:22:37,090 INFO L175 Difference]: Start difference. First operand has 424 places, 459 transitions, 5723 flow. Second operand 8 states and 178 transitions. [2024-06-14 11:22:37,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 481 transitions, 6769 flow [2024-06-14 11:22:40,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 481 transitions, 6606 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 11:22:40,945 INFO L231 Difference]: Finished difference. Result has 425 places, 459 transitions, 5686 flow [2024-06-14 11:22:40,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5560, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5686, PETRI_PLACES=425, PETRI_TRANSITIONS=459} [2024-06-14 11:22:40,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-14 11:22:40,946 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 459 transitions, 5686 flow [2024-06-14 11:22:40,946 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) [2024-06-14 11:22:40,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:40,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:40,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 11:22:40,946 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)] === [2024-06-14 11:22:40,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:40,947 INFO L85 PathProgramCache]: Analyzing trace with hash -302593305, now seen corresponding path program 19 times [2024-06-14 11:22:40,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:40,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398769773] [2024-06-14 11:22:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:40,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:41,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:41,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398769773] [2024-06-14 11:22:41,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398769773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:41,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:41,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:22:41,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90620703] [2024-06-14 11:22:41,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:41,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:22:41,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:41,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:22:41,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:22:41,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:41,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 459 transitions, 5686 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) [2024-06-14 11:22:41,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:41,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:41,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:42,129 INFO L124 PetriNetUnfolderBase]: 3137/5237 cut-off events. [2024-06-14 11:22:42,129 INFO L125 PetriNetUnfolderBase]: For 981609/981621 co-relation queries the response was YES. [2024-06-14 11:22:42,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45493 conditions, 5237 events. 3137/5237 cut-off events. For 981609/981621 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34732 event pairs, 782 based on Foata normal form. 20/5257 useless extension candidates. Maximal degree in co-relation 45299. Up to 4738 conditions per place. [2024-06-14 11:22:42,197 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 439 selfloop transitions, 35 changer transitions 0/480 dead transitions. [2024-06-14 11:22:42,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 480 transitions, 6724 flow [2024-06-14 11:22:42,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:22:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:22:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 11:22:42,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 11:22:42,198 INFO L175 Difference]: Start difference. First operand has 425 places, 459 transitions, 5686 flow. Second operand 7 states and 156 transitions. [2024-06-14 11:22:42,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 480 transitions, 6724 flow [2024-06-14 11:22:46,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 480 transitions, 6597 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:22:46,188 INFO L231 Difference]: Finished difference. Result has 425 places, 459 transitions, 5634 flow [2024-06-14 11:22:46,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5559, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5634, PETRI_PLACES=425, PETRI_TRANSITIONS=459} [2024-06-14 11:22:46,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-14 11:22:46,189 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 459 transitions, 5634 flow [2024-06-14 11:22:46,189 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) [2024-06-14 11:22:46,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:46,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:46,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 11:22:46,189 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)] === [2024-06-14 11:22:46,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:46,190 INFO L85 PathProgramCache]: Analyzing trace with hash -302741175, now seen corresponding path program 20 times [2024-06-14 11:22:46,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:46,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47085555] [2024-06-14 11:22:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:46,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:46,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:46,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47085555] [2024-06-14 11:22:46,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47085555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:46,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:46,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:22:46,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701159450] [2024-06-14 11:22:46,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:46,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:22:46,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:46,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:22:46,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:22:46,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:46,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 459 transitions, 5634 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) [2024-06-14 11:22:46,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:46,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:46,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:47,462 INFO L124 PetriNetUnfolderBase]: 3124/5214 cut-off events. [2024-06-14 11:22:47,462 INFO L125 PetriNetUnfolderBase]: For 940929/940941 co-relation queries the response was YES. [2024-06-14 11:22:47,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44746 conditions, 5214 events. 3124/5214 cut-off events. For 940929/940941 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34548 event pairs, 763 based on Foata normal form. 18/5228 useless extension candidates. Maximal degree in co-relation 44551. Up to 4683 conditions per place. [2024-06-14 11:22:47,535 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 438 selfloop transitions, 40 changer transitions 0/484 dead transitions. [2024-06-14 11:22:47,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 484 transitions, 6706 flow [2024-06-14 11:22:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:22:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:22:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 11:22:47,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:22:47,535 INFO L175 Difference]: Start difference. First operand has 425 places, 459 transitions, 5634 flow. Second operand 8 states and 176 transitions. [2024-06-14 11:22:47,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 484 transitions, 6706 flow [2024-06-14 11:22:51,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 484 transitions, 6633 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:22:51,151 INFO L231 Difference]: Finished difference. Result has 428 places, 459 transitions, 5645 flow [2024-06-14 11:22:51,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5645, PETRI_PLACES=428, PETRI_TRANSITIONS=459} [2024-06-14 11:22:51,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-14 11:22:51,152 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 459 transitions, 5645 flow [2024-06-14 11:22:51,152 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) [2024-06-14 11:22:51,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:51,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:22:51,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 11:22:51,152 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)] === [2024-06-14 11:22:51,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:51,152 INFO L85 PathProgramCache]: Analyzing trace with hash -302740989, now seen corresponding path program 15 times [2024-06-14 11:22:51,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:51,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530864311] [2024-06-14 11:22:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:51,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:51,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:51,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530864311] [2024-06-14 11:22:51,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530864311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:51,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:51,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:22:51,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351466141] [2024-06-14 11:22:51,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:51,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:22:51,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:22:51,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:22:51,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:51,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 459 transitions, 5645 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) [2024-06-14 11:22:51,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:51,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:51,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:52,386 INFO L124 PetriNetUnfolderBase]: 3111/5197 cut-off events. [2024-06-14 11:22:52,386 INFO L125 PetriNetUnfolderBase]: For 912166/912178 co-relation queries the response was YES. [2024-06-14 11:22:52,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44017 conditions, 5197 events. 3111/5197 cut-off events. For 912166/912178 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34451 event pairs, 730 based on Foata normal form. 18/5213 useless extension candidates. Maximal degree in co-relation 43821. Up to 4577 conditions per place. [2024-06-14 11:22:52,461 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 415 selfloop transitions, 63 changer transitions 0/484 dead transitions. [2024-06-14 11:22:52,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 484 transitions, 6725 flow [2024-06-14 11:22:52,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:22:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:22:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 11:22:52,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-14 11:22:52,462 INFO L175 Difference]: Start difference. First operand has 428 places, 459 transitions, 5645 flow. Second operand 8 states and 181 transitions. [2024-06-14 11:22:52,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 484 transitions, 6725 flow [2024-06-14 11:22:55,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 484 transitions, 6623 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:22:55,942 INFO L231 Difference]: Finished difference. Result has 430 places, 459 transitions, 5675 flow [2024-06-14 11:22:55,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5543, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5675, PETRI_PLACES=430, PETRI_TRANSITIONS=459} [2024-06-14 11:22:55,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-14 11:22:55,943 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 459 transitions, 5675 flow [2024-06-14 11:22:55,943 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) [2024-06-14 11:22:55,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:22:55,943 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, 1, 1] [2024-06-14 11:22:55,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 11:22:55,943 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)] === [2024-06-14 11:22:55,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:22:55,943 INFO L85 PathProgramCache]: Analyzing trace with hash 727282739, now seen corresponding path program 21 times [2024-06-14 11:22:55,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:22:55,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147459264] [2024-06-14 11:22:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:22:55,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:22:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:22:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:22:56,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:22:56,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147459264] [2024-06-14 11:22:56,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147459264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:22:56,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:22:56,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:22:56,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192121266] [2024-06-14 11:22:56,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:22:56,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:22:56,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:22:56,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:22:56,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:22:56,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:22:56,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 459 transitions, 5675 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) [2024-06-14 11:22:56,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:22:56,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:22:56,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:22:57,146 INFO L124 PetriNetUnfolderBase]: 3139/5243 cut-off events. [2024-06-14 11:22:57,146 INFO L125 PetriNetUnfolderBase]: For 941759/941771 co-relation queries the response was YES. [2024-06-14 11:22:57,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44444 conditions, 5243 events. 3139/5243 cut-off events. For 941759/941771 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 34874 event pairs, 772 based on Foata normal form. 20/5263 useless extension candidates. Maximal degree in co-relation 44247. Up to 4651 conditions per place. [2024-06-14 11:22:57,219 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 403 selfloop transitions, 81 changer transitions 0/490 dead transitions. [2024-06-14 11:22:57,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 490 transitions, 6773 flow [2024-06-14 11:22:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:22:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:22:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-14 11:22:57,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-14 11:22:57,220 INFO L175 Difference]: Start difference. First operand has 430 places, 459 transitions, 5675 flow. Second operand 10 states and 216 transitions. [2024-06-14 11:22:57,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 490 transitions, 6773 flow [2024-06-14 11:23:00,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 490 transitions, 6598 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 11:23:00,960 INFO L231 Difference]: Finished difference. Result has 432 places, 460 transitions, 5687 flow [2024-06-14 11:23:00,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5500, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5687, PETRI_PLACES=432, PETRI_TRANSITIONS=460} [2024-06-14 11:23:00,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-14 11:23:00,960 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 460 transitions, 5687 flow [2024-06-14 11:23:00,960 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) [2024-06-14 11:23:00,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:00,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:00,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 11:23:00,961 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)] === [2024-06-14 11:23:00,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:00,961 INFO L85 PathProgramCache]: Analyzing trace with hash -172646733, now seen corresponding path program 22 times [2024-06-14 11:23:00,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:00,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409233290] [2024-06-14 11:23:00,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:00,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:01,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:01,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409233290] [2024-06-14 11:23:01,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409233290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:01,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:01,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:23:01,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561582267] [2024-06-14 11:23:01,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:01,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:23:01,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:01,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:23:01,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:23:01,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:01,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 460 transitions, 5687 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) [2024-06-14 11:23:01,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:01,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:01,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:02,213 INFO L124 PetriNetUnfolderBase]: 3121/5221 cut-off events. [2024-06-14 11:23:02,213 INFO L125 PetriNetUnfolderBase]: For 896104/896116 co-relation queries the response was YES. [2024-06-14 11:23:02,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43434 conditions, 5221 events. 3121/5221 cut-off events. For 896104/896116 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 34714 event pairs, 754 based on Foata normal form. 20/5241 useless extension candidates. Maximal degree in co-relation 43236. Up to 4540 conditions per place. [2024-06-14 11:23:02,286 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 416 selfloop transitions, 68 changer transitions 0/490 dead transitions. [2024-06-14 11:23:02,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 490 transitions, 6769 flow [2024-06-14 11:23:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:23:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:23:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 11:23:02,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 11:23:02,287 INFO L175 Difference]: Start difference. First operand has 432 places, 460 transitions, 5687 flow. Second operand 7 states and 169 transitions. [2024-06-14 11:23:02,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 490 transitions, 6769 flow [2024-06-14 11:23:06,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 490 transitions, 6600 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:23:06,390 INFO L231 Difference]: Finished difference. Result has 431 places, 460 transitions, 5666 flow [2024-06-14 11:23:06,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5518, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5666, PETRI_PLACES=431, PETRI_TRANSITIONS=460} [2024-06-14 11:23:06,390 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-14 11:23:06,390 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 460 transitions, 5666 flow [2024-06-14 11:23:06,391 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) [2024-06-14 11:23:06,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:06,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:06,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 11:23:06,391 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)] === [2024-06-14 11:23:06,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:06,391 INFO L85 PathProgramCache]: Analyzing trace with hash -177830367, now seen corresponding path program 16 times [2024-06-14 11:23:06,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:06,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631409506] [2024-06-14 11:23:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:06,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:06,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:06,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631409506] [2024-06-14 11:23:06,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631409506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:06,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:06,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:23:06,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788497071] [2024-06-14 11:23:06,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:06,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:23:06,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:06,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:23:06,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:23:06,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:06,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 460 transitions, 5666 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) [2024-06-14 11:23:06,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:06,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:06,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:07,637 INFO L124 PetriNetUnfolderBase]: 3149/5265 cut-off events. [2024-06-14 11:23:07,637 INFO L125 PetriNetUnfolderBase]: For 911191/911203 co-relation queries the response was YES. [2024-06-14 11:23:07,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43885 conditions, 5265 events. 3149/5265 cut-off events. For 911191/911203 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 35061 event pairs, 746 based on Foata normal form. 20/5285 useless extension candidates. Maximal degree in co-relation 43686. Up to 4635 conditions per place. [2024-06-14 11:23:07,708 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 415 selfloop transitions, 61 changer transitions 0/482 dead transitions. [2024-06-14 11:23:07,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 482 transitions, 6743 flow [2024-06-14 11:23:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:23:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:23:07,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 11:23:07,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 11:23:07,709 INFO L175 Difference]: Start difference. First operand has 431 places, 460 transitions, 5666 flow. Second operand 7 states and 160 transitions. [2024-06-14 11:23:07,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 482 transitions, 6743 flow [2024-06-14 11:23:11,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 482 transitions, 6590 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 11:23:11,547 INFO L231 Difference]: Finished difference. Result has 431 places, 461 transitions, 5682 flow [2024-06-14 11:23:11,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5513, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5682, PETRI_PLACES=431, PETRI_TRANSITIONS=461} [2024-06-14 11:23:11,548 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-14 11:23:11,548 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 461 transitions, 5682 flow [2024-06-14 11:23:11,548 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) [2024-06-14 11:23:11,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:11,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:11,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 11:23:11,548 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)] === [2024-06-14 11:23:11,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:11,548 INFO L85 PathProgramCache]: Analyzing trace with hash -167105607, now seen corresponding path program 17 times [2024-06-14 11:23:11,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:11,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486548425] [2024-06-14 11:23:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:11,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:11,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:11,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486548425] [2024-06-14 11:23:11,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486548425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:11,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:11,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:23:11,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085799446] [2024-06-14 11:23:11,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:11,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:23:11,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:11,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:23:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:23:11,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:11,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 461 transitions, 5682 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) [2024-06-14 11:23:11,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:11,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:11,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:12,763 INFO L124 PetriNetUnfolderBase]: 3164/5290 cut-off events. [2024-06-14 11:23:12,763 INFO L125 PetriNetUnfolderBase]: For 896389/896401 co-relation queries the response was YES. [2024-06-14 11:23:12,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43874 conditions, 5290 events. 3164/5290 cut-off events. For 896389/896401 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35250 event pairs, 761 based on Foata normal form. 20/5310 useless extension candidates. Maximal degree in co-relation 43675. Up to 4724 conditions per place. [2024-06-14 11:23:12,832 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 419 selfloop transitions, 59 changer transitions 0/484 dead transitions. [2024-06-14 11:23:12,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 484 transitions, 6767 flow [2024-06-14 11:23:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:23:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:23:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 11:23:12,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 11:23:12,833 INFO L175 Difference]: Start difference. First operand has 431 places, 461 transitions, 5682 flow. Second operand 8 states and 177 transitions. [2024-06-14 11:23:12,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 484 transitions, 6767 flow [2024-06-14 11:23:16,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 484 transitions, 6629 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 11:23:16,615 INFO L231 Difference]: Finished difference. Result has 432 places, 462 transitions, 5705 flow [2024-06-14 11:23:16,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5544, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5705, PETRI_PLACES=432, PETRI_TRANSITIONS=462} [2024-06-14 11:23:16,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-14 11:23:16,616 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 462 transitions, 5705 flow [2024-06-14 11:23:16,616 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) [2024-06-14 11:23:16,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:16,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:16,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 11:23:16,616 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)] === [2024-06-14 11:23:16,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:16,617 INFO L85 PathProgramCache]: Analyzing trace with hash -178009113, now seen corresponding path program 23 times [2024-06-14 11:23:16,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:16,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264315153] [2024-06-14 11:23:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:16,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:16,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:16,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264315153] [2024-06-14 11:23:16,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264315153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:16,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:16,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:23:16,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849551343] [2024-06-14 11:23:16,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:16,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:23:16,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:16,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:23:16,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:23:16,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:16,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 462 transitions, 5705 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) [2024-06-14 11:23:16,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:16,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:16,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:17,827 INFO L124 PetriNetUnfolderBase]: 3146/5264 cut-off events. [2024-06-14 11:23:17,827 INFO L125 PetriNetUnfolderBase]: For 822241/822253 co-relation queries the response was YES. [2024-06-14 11:23:17,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42503 conditions, 5264 events. 3146/5264 cut-off events. For 822241/822253 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35136 event pairs, 753 based on Foata normal form. 20/5284 useless extension candidates. Maximal degree in co-relation 42305. Up to 4565 conditions per place. [2024-06-14 11:23:17,900 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 421 selfloop transitions, 69 changer transitions 0/496 dead transitions. [2024-06-14 11:23:17,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 496 transitions, 6809 flow [2024-06-14 11:23:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:23:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:23:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 11:23:17,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 11:23:17,901 INFO L175 Difference]: Start difference. First operand has 432 places, 462 transitions, 5705 flow. Second operand 8 states and 189 transitions. [2024-06-14 11:23:17,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 496 transitions, 6809 flow [2024-06-14 11:23:20,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 496 transitions, 6672 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 11:23:20,978 INFO L231 Difference]: Finished difference. Result has 433 places, 462 transitions, 5717 flow [2024-06-14 11:23:20,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5568, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5717, PETRI_PLACES=433, PETRI_TRANSITIONS=462} [2024-06-14 11:23:20,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-14 11:23:20,978 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 462 transitions, 5717 flow [2024-06-14 11:23:20,978 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) [2024-06-14 11:23:20,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:20,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:20,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 11:23:20,979 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)] === [2024-06-14 11:23:20,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:20,979 INFO L85 PathProgramCache]: Analyzing trace with hash -178156797, now seen corresponding path program 18 times [2024-06-14 11:23:20,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:20,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602018156] [2024-06-14 11:23:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:20,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:21,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:21,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602018156] [2024-06-14 11:23:21,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602018156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:21,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:21,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:23:21,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151695413] [2024-06-14 11:23:21,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:21,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:23:21,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:21,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:23:21,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:23:21,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:21,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 462 transitions, 5717 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) [2024-06-14 11:23:21,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:21,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:21,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:22,215 INFO L124 PetriNetUnfolderBase]: 3133/5245 cut-off events. [2024-06-14 11:23:22,215 INFO L125 PetriNetUnfolderBase]: For 762076/762088 co-relation queries the response was YES. [2024-06-14 11:23:22,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41562 conditions, 5245 events. 3133/5245 cut-off events. For 762076/762088 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 34959 event pairs, 515 based on Foata normal form. 18/5263 useless extension candidates. Maximal degree in co-relation 41364. Up to 4319 conditions per place. [2024-06-14 11:23:22,282 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 404 selfloop transitions, 79 changer transitions 0/489 dead transitions. [2024-06-14 11:23:22,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 489 transitions, 6813 flow [2024-06-14 11:23:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:23:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:23:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 11:23:22,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 11:23:22,283 INFO L175 Difference]: Start difference. First operand has 433 places, 462 transitions, 5717 flow. Second operand 7 states and 166 transitions. [2024-06-14 11:23:22,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 489 transitions, 6813 flow [2024-06-14 11:23:25,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 489 transitions, 6652 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 11:23:25,825 INFO L231 Difference]: Finished difference. Result has 431 places, 462 transitions, 5728 flow [2024-06-14 11:23:25,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5556, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5728, PETRI_PLACES=431, PETRI_TRANSITIONS=462} [2024-06-14 11:23:25,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-14 11:23:25,825 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 462 transitions, 5728 flow [2024-06-14 11:23:25,826 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) [2024-06-14 11:23:25,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:25,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:25,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 11:23:25,826 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)] === [2024-06-14 11:23:25,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:25,826 INFO L85 PathProgramCache]: Analyzing trace with hash -178156983, now seen corresponding path program 24 times [2024-06-14 11:23:25,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:25,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106034683] [2024-06-14 11:23:25,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:25,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:25,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:25,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106034683] [2024-06-14 11:23:25,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106034683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:25,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:25,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:23:25,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255155024] [2024-06-14 11:23:25,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:25,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:23:25,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:25,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:23:25,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:23:26,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:26,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 462 transitions, 5728 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) [2024-06-14 11:23:26,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:26,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:26,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:27,080 INFO L124 PetriNetUnfolderBase]: 3120/5230 cut-off events. [2024-06-14 11:23:27,080 INFO L125 PetriNetUnfolderBase]: For 707523/707535 co-relation queries the response was YES. [2024-06-14 11:23:27,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40746 conditions, 5230 events. 3120/5230 cut-off events. For 707523/707535 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 34971 event pairs, 512 based on Foata normal form. 18/5248 useless extension candidates. Maximal degree in co-relation 40549. Up to 4200 conditions per place. [2024-06-14 11:23:27,154 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 407 selfloop transitions, 86 changer transitions 0/499 dead transitions. [2024-06-14 11:23:27,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 499 transitions, 6862 flow [2024-06-14 11:23:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:23:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:23:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 11:23:27,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:23:27,155 INFO L175 Difference]: Start difference. First operand has 431 places, 462 transitions, 5728 flow. Second operand 8 states and 192 transitions. [2024-06-14 11:23:27,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 499 transitions, 6862 flow [2024-06-14 11:23:30,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 499 transitions, 6680 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 11:23:30,549 INFO L231 Difference]: Finished difference. Result has 431 places, 462 transitions, 5726 flow [2024-06-14 11:23:30,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5546, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5726, PETRI_PLACES=431, PETRI_TRANSITIONS=462} [2024-06-14 11:23:30,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-14 11:23:30,550 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 462 transitions, 5726 flow [2024-06-14 11:23:30,550 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) [2024-06-14 11:23:30,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:30,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:30,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 11:23:30,551 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)] === [2024-06-14 11:23:30,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1862053239, now seen corresponding path program 25 times [2024-06-14 11:23:30,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:30,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431402709] [2024-06-14 11:23:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:30,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:30,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:30,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431402709] [2024-06-14 11:23:30,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431402709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:30,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:30,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:23:30,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888112186] [2024-06-14 11:23:30,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:30,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:23:30,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:30,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:23:30,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:23:30,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:30,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 462 transitions, 5726 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) [2024-06-14 11:23:30,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:30,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:30,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:31,763 INFO L124 PetriNetUnfolderBase]: 3102/5200 cut-off events. [2024-06-14 11:23:31,763 INFO L125 PetriNetUnfolderBase]: For 643568/643580 co-relation queries the response was YES. [2024-06-14 11:23:31,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39327 conditions, 5200 events. 3102/5200 cut-off events. For 643568/643580 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 34753 event pairs, 729 based on Foata normal form. 20/5220 useless extension candidates. Maximal degree in co-relation 39132. Up to 4433 conditions per place. [2024-06-14 11:23:31,829 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 401 selfloop transitions, 93 changer transitions 0/500 dead transitions. [2024-06-14 11:23:31,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 500 transitions, 6848 flow [2024-06-14 11:23:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:23:31,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:23:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 11:23:31,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 11:23:31,830 INFO L175 Difference]: Start difference. First operand has 431 places, 462 transitions, 5726 flow. Second operand 9 states and 210 transitions. [2024-06-14 11:23:31,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 500 transitions, 6848 flow [2024-06-14 11:23:34,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 500 transitions, 6660 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 11:23:34,564 INFO L231 Difference]: Finished difference. Result has 431 places, 462 transitions, 5738 flow [2024-06-14 11:23:34,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5738, PETRI_PLACES=431, PETRI_TRANSITIONS=462} [2024-06-14 11:23:34,564 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-14 11:23:34,564 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 462 transitions, 5738 flow [2024-06-14 11:23:34,564 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) [2024-06-14 11:23:34,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:34,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:34,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 11:23:34,565 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)] === [2024-06-14 11:23:34,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:34,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1636830303, now seen corresponding path program 19 times [2024-06-14 11:23:34,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:34,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716542733] [2024-06-14 11:23:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:34,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:34,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:34,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716542733] [2024-06-14 11:23:34,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716542733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:34,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:34,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:23:34,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524952] [2024-06-14 11:23:34,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:34,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:23:34,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:23:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:23:34,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:34,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 462 transitions, 5738 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) [2024-06-14 11:23:34,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:34,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:34,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:35,921 INFO L124 PetriNetUnfolderBase]: 3176/5318 cut-off events. [2024-06-14 11:23:35,922 INFO L125 PetriNetUnfolderBase]: For 690374/690386 co-relation queries the response was YES. [2024-06-14 11:23:35,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41192 conditions, 5318 events. 3176/5318 cut-off events. For 690374/690386 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 35529 event pairs, 741 based on Foata normal form. 20/5338 useless extension candidates. Maximal degree in co-relation 40998. Up to 4410 conditions per place. [2024-06-14 11:23:35,978 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 396 selfloop transitions, 90 changer transitions 0/492 dead transitions. [2024-06-14 11:23:35,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 492 transitions, 7164 flow [2024-06-14 11:23:35,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:23:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:23:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 11:23:35,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-14 11:23:35,979 INFO L175 Difference]: Start difference. First operand has 431 places, 462 transitions, 5738 flow. Second operand 9 states and 197 transitions. [2024-06-14 11:23:35,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 492 transitions, 7164 flow [2024-06-14 11:23:38,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 492 transitions, 6958 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 11:23:38,896 INFO L231 Difference]: Finished difference. Result has 432 places, 464 transitions, 5820 flow [2024-06-14 11:23:38,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5820, PETRI_PLACES=432, PETRI_TRANSITIONS=464} [2024-06-14 11:23:38,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-14 11:23:38,897 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 464 transitions, 5820 flow [2024-06-14 11:23:38,897 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) [2024-06-14 11:23:38,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:38,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:38,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 11:23:38,897 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)] === [2024-06-14 11:23:38,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:38,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1633973343, now seen corresponding path program 20 times [2024-06-14 11:23:38,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:38,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743490119] [2024-06-14 11:23:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:38,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:39,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:39,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743490119] [2024-06-14 11:23:39,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743490119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:39,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:39,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:23:39,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704670024] [2024-06-14 11:23:39,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:39,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:23:39,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:39,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:23:39,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:23:39,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:39,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 464 transitions, 5820 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) [2024-06-14 11:23:39,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:39,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:39,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:40,069 INFO L124 PetriNetUnfolderBase]: 3204/5362 cut-off events. [2024-06-14 11:23:40,070 INFO L125 PetriNetUnfolderBase]: For 673938/673950 co-relation queries the response was YES. [2024-06-14 11:23:40,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41713 conditions, 5362 events. 3204/5362 cut-off events. For 673938/673950 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 35964 event pairs, 777 based on Foata normal form. 20/5382 useless extension candidates. Maximal degree in co-relation 41518. Up to 4756 conditions per place. [2024-06-14 11:23:40,140 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 398 selfloop transitions, 84 changer transitions 0/488 dead transitions. [2024-06-14 11:23:40,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 488 transitions, 6920 flow [2024-06-14 11:23:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:23:40,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:23:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 11:23:40,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-14 11:23:40,141 INFO L175 Difference]: Start difference. First operand has 432 places, 464 transitions, 5820 flow. Second operand 9 states and 193 transitions. [2024-06-14 11:23:40,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 488 transitions, 6920 flow [2024-06-14 11:23:42,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 488 transitions, 6745 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 11:23:42,719 INFO L231 Difference]: Finished difference. Result has 435 places, 465 transitions, 5861 flow [2024-06-14 11:23:42,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5861, PETRI_PLACES=435, PETRI_TRANSITIONS=465} [2024-06-14 11:23:42,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-14 11:23:42,719 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 465 transitions, 5861 flow [2024-06-14 11:23:42,719 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) [2024-06-14 11:23:42,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:42,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:42,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 11:23:42,719 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)] === [2024-06-14 11:23:42,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1861874493, now seen corresponding path program 21 times [2024-06-14 11:23:42,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:42,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651319511] [2024-06-14 11:23:42,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:42,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:42,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:42,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651319511] [2024-06-14 11:23:42,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651319511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:42,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:42,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:23:42,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208596623] [2024-06-14 11:23:42,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:42,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:23:42,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:42,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:23:42,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:23:42,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:42,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 465 transitions, 5861 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) [2024-06-14 11:23:42,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:42,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:42,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:43,937 INFO L124 PetriNetUnfolderBase]: 3186/5336 cut-off events. [2024-06-14 11:23:43,937 INFO L125 PetriNetUnfolderBase]: For 617958/617970 co-relation queries the response was YES. [2024-06-14 11:23:43,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40330 conditions, 5336 events. 3186/5336 cut-off events. For 617958/617970 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 35763 event pairs, 769 based on Foata normal form. 20/5356 useless extension candidates. Maximal degree in co-relation 40134. Up to 4698 conditions per place. [2024-06-14 11:23:44,003 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 397 selfloop transitions, 89 changer transitions 0/492 dead transitions. [2024-06-14 11:23:44,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 492 transitions, 6941 flow [2024-06-14 11:23:44,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:23:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:23:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 11:23:44,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-14 11:23:44,004 INFO L175 Difference]: Start difference. First operand has 435 places, 465 transitions, 5861 flow. Second operand 10 states and 213 transitions. [2024-06-14 11:23:44,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 492 transitions, 6941 flow [2024-06-14 11:23:46,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 492 transitions, 6748 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 11:23:46,582 INFO L231 Difference]: Finished difference. Result has 436 places, 465 transitions, 5857 flow [2024-06-14 11:23:46,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5668, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5857, PETRI_PLACES=436, PETRI_TRANSITIONS=465} [2024-06-14 11:23:46,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-14 11:23:46,583 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 465 transitions, 5857 flow [2024-06-14 11:23:46,583 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) [2024-06-14 11:23:46,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:46,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:46,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 11:23:46,583 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)] === [2024-06-14 11:23:46,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:46,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1792546063, now seen corresponding path program 26 times [2024-06-14 11:23:46,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:46,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739544677] [2024-06-14 11:23:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:46,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:46,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:46,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739544677] [2024-06-14 11:23:46,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739544677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:46,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:46,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:23:46,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786222515] [2024-06-14 11:23:46,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:46,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:23:46,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:46,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:23:46,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:23:46,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:46,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 465 transitions, 5857 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) [2024-06-14 11:23:46,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:46,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:46,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:47,791 INFO L124 PetriNetUnfolderBase]: 3173/5309 cut-off events. [2024-06-14 11:23:47,791 INFO L125 PetriNetUnfolderBase]: For 564358/564370 co-relation queries the response was YES. [2024-06-14 11:23:47,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39374 conditions, 5309 events. 3173/5309 cut-off events. For 564358/564370 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 35653 event pairs, 697 based on Foata normal form. 18/5323 useless extension candidates. Maximal degree in co-relation 39179. Up to 4369 conditions per place. [2024-06-14 11:23:47,864 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 399 selfloop transitions, 105 changer transitions 0/510 dead transitions. [2024-06-14 11:23:47,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 510 transitions, 7033 flow [2024-06-14 11:23:47,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:23:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:23:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-14 11:23:47,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5682926829268292 [2024-06-14 11:23:47,865 INFO L175 Difference]: Start difference. First operand has 436 places, 465 transitions, 5857 flow. Second operand 10 states and 233 transitions. [2024-06-14 11:23:47,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 510 transitions, 7033 flow [2024-06-14 11:23:50,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 510 transitions, 6824 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 11:23:50,258 INFO L231 Difference]: Finished difference. Result has 436 places, 465 transitions, 5868 flow [2024-06-14 11:23:50,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5648, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5868, PETRI_PLACES=436, PETRI_TRANSITIONS=465} [2024-06-14 11:23:50,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-14 11:23:50,259 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 465 transitions, 5868 flow [2024-06-14 11:23:50,259 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) [2024-06-14 11:23:50,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:50,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:50,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 11:23:50,259 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)] === [2024-06-14 11:23:50,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:50,260 INFO L85 PathProgramCache]: Analyzing trace with hash 82586425, now seen corresponding path program 22 times [2024-06-14 11:23:50,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:50,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797456562] [2024-06-14 11:23:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:50,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:50,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:50,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797456562] [2024-06-14 11:23:50,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797456562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:50,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:50,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:23:50,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218380131] [2024-06-14 11:23:50,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:50,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:23:50,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:50,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:23:50,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:23:50,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:50,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 465 transitions, 5868 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) [2024-06-14 11:23:50,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:50,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:50,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:51,369 INFO L124 PetriNetUnfolderBase]: 3188/5340 cut-off events. [2024-06-14 11:23:51,369 INFO L125 PetriNetUnfolderBase]: For 563705/563709 co-relation queries the response was YES. [2024-06-14 11:23:51,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39483 conditions, 5340 events. 3188/5340 cut-off events. For 563705/563709 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 35838 event pairs, 787 based on Foata normal form. 12/5351 useless extension candidates. Maximal degree in co-relation 39288. Up to 4768 conditions per place. [2024-06-14 11:23:51,437 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 397 selfloop transitions, 78 changer transitions 0/481 dead transitions. [2024-06-14 11:23:51,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 481 transitions, 6931 flow [2024-06-14 11:23:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:23:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:23:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 11:23:51,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 11:23:51,438 INFO L175 Difference]: Start difference. First operand has 436 places, 465 transitions, 5868 flow. Second operand 7 states and 152 transitions. [2024-06-14 11:23:51,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 481 transitions, 6931 flow [2024-06-14 11:23:53,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 481 transitions, 6703 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-14 11:23:53,743 INFO L231 Difference]: Finished difference. Result has 432 places, 466 transitions, 5838 flow [2024-06-14 11:23:53,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5640, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5838, PETRI_PLACES=432, PETRI_TRANSITIONS=466} [2024-06-14 11:23:53,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-14 11:23:53,743 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 466 transitions, 5838 flow [2024-06-14 11:23:53,743 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) [2024-06-14 11:23:53,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:53,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:53,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 11:23:53,744 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)] === [2024-06-14 11:23:53,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:53,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1948892733, now seen corresponding path program 23 times [2024-06-14 11:23:53,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:53,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370177829] [2024-06-14 11:23:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:53,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:53,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:53,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370177829] [2024-06-14 11:23:53,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370177829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:53,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:53,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:23:53,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719562670] [2024-06-14 11:23:53,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:53,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:23:53,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:53,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:23:53,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:23:53,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:53,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 466 transitions, 5838 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) [2024-06-14 11:23:53,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:53,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:53,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:54,964 INFO L124 PetriNetUnfolderBase]: 3175/5310 cut-off events. [2024-06-14 11:23:54,964 INFO L125 PetriNetUnfolderBase]: For 493897/493909 co-relation queries the response was YES. [2024-06-14 11:23:55,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38250 conditions, 5310 events. 3175/5310 cut-off events. For 493897/493909 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 35548 event pairs, 721 based on Foata normal form. 18/5315 useless extension candidates. Maximal degree in co-relation 38056. Up to 4449 conditions per place. [2024-06-14 11:23:55,035 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 388 selfloop transitions, 105 changer transitions 0/499 dead transitions. [2024-06-14 11:23:55,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 499 transitions, 6968 flow [2024-06-14 11:23:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:23:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:23:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 11:23:55,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 11:23:55,036 INFO L175 Difference]: Start difference. First operand has 432 places, 466 transitions, 5838 flow. Second operand 10 states and 219 transitions. [2024-06-14 11:23:55,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 499 transitions, 6968 flow [2024-06-14 11:23:57,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 499 transitions, 6789 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 11:23:57,535 INFO L231 Difference]: Finished difference. Result has 437 places, 466 transitions, 5879 flow [2024-06-14 11:23:57,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5659, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5879, PETRI_PLACES=437, PETRI_TRANSITIONS=466} [2024-06-14 11:23:57,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-14 11:23:57,536 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 466 transitions, 5879 flow [2024-06-14 11:23:57,536 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) [2024-06-14 11:23:57,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:23:57,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:23:57,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 11:23:57,537 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)] === [2024-06-14 11:23:57,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:23:57,537 INFO L85 PathProgramCache]: Analyzing trace with hash 79729465, now seen corresponding path program 24 times [2024-06-14 11:23:57,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:23:57,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739385210] [2024-06-14 11:23:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:23:57,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:23:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:23:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:23:57,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:23:57,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739385210] [2024-06-14 11:23:57,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739385210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:23:57,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:23:57,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:23:57,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562886039] [2024-06-14 11:23:57,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:23:57,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:23:57,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:23:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:23:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:23:57,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:23:57,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 466 transitions, 5879 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) [2024-06-14 11:23:57,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:23:57,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:23:57,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:23:58,642 INFO L124 PetriNetUnfolderBase]: 3190/5346 cut-off events. [2024-06-14 11:23:58,643 INFO L125 PetriNetUnfolderBase]: For 502829/502833 co-relation queries the response was YES. [2024-06-14 11:23:58,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38366 conditions, 5346 events. 3190/5346 cut-off events. For 502829/502833 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 35922 event pairs, 777 based on Foata normal form. 12/5357 useless extension candidates. Maximal degree in co-relation 38171. Up to 4666 conditions per place. [2024-06-14 11:23:58,709 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 400 selfloop transitions, 80 changer transitions 0/486 dead transitions. [2024-06-14 11:23:58,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 486 transitions, 7000 flow [2024-06-14 11:23:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:23:58,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:23:58,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 11:23:58,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-14 11:23:58,710 INFO L175 Difference]: Start difference. First operand has 437 places, 466 transitions, 5879 flow. Second operand 7 states and 155 transitions. [2024-06-14 11:23:58,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 486 transitions, 7000 flow [2024-06-14 11:24:00,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 486 transitions, 6751 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-14 11:24:00,835 INFO L231 Difference]: Finished difference. Result has 433 places, 467 transitions, 5827 flow [2024-06-14 11:24:00,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5630, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5827, PETRI_PLACES=433, PETRI_TRANSITIONS=467} [2024-06-14 11:24:00,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-14 11:24:00,835 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 467 transitions, 5827 flow [2024-06-14 11:24:00,835 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) [2024-06-14 11:24:00,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:00,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:00,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 11:24:00,836 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)] === [2024-06-14 11:24:00,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:00,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1950529533, now seen corresponding path program 25 times [2024-06-14 11:24:00,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:00,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223882656] [2024-06-14 11:24:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:00,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:00,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:00,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223882656] [2024-06-14 11:24:00,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223882656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:00,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:00,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:00,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579988385] [2024-06-14 11:24:00,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:00,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:00,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:00,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:00,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:01,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:01,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 467 transitions, 5827 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) [2024-06-14 11:24:01,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:01,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:01,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:02,192 INFO L124 PetriNetUnfolderBase]: 3210/5384 cut-off events. [2024-06-14 11:24:02,192 INFO L125 PetriNetUnfolderBase]: For 473654/473666 co-relation queries the response was YES. [2024-06-14 11:24:02,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38206 conditions, 5384 events. 3210/5384 cut-off events. For 473654/473666 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 36125 event pairs, 489 based on Foata normal form. 18/5402 useless extension candidates. Maximal degree in co-relation 38013. Up to 3690 conditions per place. [2024-06-14 11:24:02,247 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 358 selfloop transitions, 137 changer transitions 0/501 dead transitions. [2024-06-14 11:24:02,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 501 transitions, 7240 flow [2024-06-14 11:24:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:24:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:24:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 11:24:02,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-14 11:24:02,248 INFO L175 Difference]: Start difference. First operand has 433 places, 467 transitions, 5827 flow. Second operand 9 states and 202 transitions. [2024-06-14 11:24:02,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 501 transitions, 7240 flow [2024-06-14 11:24:04,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 501 transitions, 7060 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:24:04,167 INFO L231 Difference]: Finished difference. Result has 436 places, 468 transitions, 5964 flow [2024-06-14 11:24:04,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5649, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5964, PETRI_PLACES=436, PETRI_TRANSITIONS=468} [2024-06-14 11:24:04,168 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-14 11:24:04,168 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 468 transitions, 5964 flow [2024-06-14 11:24:04,168 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) [2024-06-14 11:24:04,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:04,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:04,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 11:24:04,168 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)] === [2024-06-14 11:24:04,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:04,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1950766869, now seen corresponding path program 27 times [2024-06-14 11:24:04,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:04,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791187245] [2024-06-14 11:24:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:04,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:04,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:04,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791187245] [2024-06-14 11:24:04,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791187245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:04,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:04,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:04,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550096821] [2024-06-14 11:24:04,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:04,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:04,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:04,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:04,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:04,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:04,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 468 transitions, 5964 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) [2024-06-14 11:24:04,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:04,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:04,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:05,376 INFO L124 PetriNetUnfolderBase]: 3197/5365 cut-off events. [2024-06-14 11:24:05,376 INFO L125 PetriNetUnfolderBase]: For 437465/437477 co-relation queries the response was YES. [2024-06-14 11:24:05,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37819 conditions, 5365 events. 3197/5365 cut-off events. For 437465/437477 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 36065 event pairs, 460 based on Foata normal form. 18/5383 useless extension candidates. Maximal degree in co-relation 37626. Up to 3774 conditions per place. [2024-06-14 11:24:05,443 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 380 selfloop transitions, 124 changer transitions 0/510 dead transitions. [2024-06-14 11:24:05,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 510 transitions, 7132 flow [2024-06-14 11:24:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:24:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:24:05,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 11:24:05,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 11:24:05,444 INFO L175 Difference]: Start difference. First operand has 436 places, 468 transitions, 5964 flow. Second operand 9 states and 213 transitions. [2024-06-14 11:24:05,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 510 transitions, 7132 flow [2024-06-14 11:24:07,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 510 transitions, 6853 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 11:24:07,171 INFO L231 Difference]: Finished difference. Result has 436 places, 468 transitions, 5941 flow [2024-06-14 11:24:07,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5685, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5941, PETRI_PLACES=436, PETRI_TRANSITIONS=468} [2024-06-14 11:24:07,172 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-14 11:24:07,172 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 468 transitions, 5941 flow [2024-06-14 11:24:07,172 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) [2024-06-14 11:24:07,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:07,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:07,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 11:24:07,172 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)] === [2024-06-14 11:24:07,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:07,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1950766683, now seen corresponding path program 26 times [2024-06-14 11:24:07,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:07,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724387786] [2024-06-14 11:24:07,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:07,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:07,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:07,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724387786] [2024-06-14 11:24:07,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724387786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:07,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:07,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:07,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309377294] [2024-06-14 11:24:07,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:07,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:07,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:07,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:07,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:07,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:07,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 468 transitions, 5941 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) [2024-06-14 11:24:07,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:07,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:07,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:08,388 INFO L124 PetriNetUnfolderBase]: 3184/5346 cut-off events. [2024-06-14 11:24:08,388 INFO L125 PetriNetUnfolderBase]: For 390590/390602 co-relation queries the response was YES. [2024-06-14 11:24:08,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36728 conditions, 5346 events. 3184/5346 cut-off events. For 390590/390602 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 35924 event pairs, 480 based on Foata normal form. 18/5364 useless extension candidates. Maximal degree in co-relation 36537. Up to 3665 conditions per place. [2024-06-14 11:24:08,446 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 364 selfloop transitions, 134 changer transitions 0/504 dead transitions. [2024-06-14 11:24:08,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 504 transitions, 7131 flow [2024-06-14 11:24:08,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:24:08,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:24:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-14 11:24:08,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-14 11:24:08,447 INFO L175 Difference]: Start difference. First operand has 436 places, 468 transitions, 5941 flow. Second operand 9 states and 206 transitions. [2024-06-14 11:24:08,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 504 transitions, 7131 flow [2024-06-14 11:24:10,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 504 transitions, 6821 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 11:24:10,387 INFO L231 Difference]: Finished difference. Result has 435 places, 468 transitions, 5909 flow [2024-06-14 11:24:10,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5909, PETRI_PLACES=435, PETRI_TRANSITIONS=468} [2024-06-14 11:24:10,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-14 11:24:10,388 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 468 transitions, 5909 flow [2024-06-14 11:24:10,388 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) [2024-06-14 11:24:10,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:10,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:10,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 11:24:10,388 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)] === [2024-06-14 11:24:10,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:10,388 INFO L85 PathProgramCache]: Analyzing trace with hash 638633651, now seen corresponding path program 1 times [2024-06-14 11:24:10,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:10,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984344211] [2024-06-14 11:24:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:10,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:10,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:10,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984344211] [2024-06-14 11:24:10,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984344211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:10,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:10,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:10,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95075194] [2024-06-14 11:24:10,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:10,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:10,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:10,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:10,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:10,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:10,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 468 transitions, 5909 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) [2024-06-14 11:24:10,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:10,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:10,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:11,605 INFO L124 PetriNetUnfolderBase]: 3204/5382 cut-off events. [2024-06-14 11:24:11,605 INFO L125 PetriNetUnfolderBase]: For 386653/386665 co-relation queries the response was YES. [2024-06-14 11:24:11,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36949 conditions, 5382 events. 3204/5382 cut-off events. For 386653/386665 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 36342 event pairs, 704 based on Foata normal form. 18/5400 useless extension candidates. Maximal degree in co-relation 36758. Up to 4077 conditions per place. [2024-06-14 11:24:11,672 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 410 selfloop transitions, 95 changer transitions 0/511 dead transitions. [2024-06-14 11:24:11,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 511 transitions, 7345 flow [2024-06-14 11:24:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:24:11,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:24:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 11:24:11,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-14 11:24:11,673 INFO L175 Difference]: Start difference. First operand has 435 places, 468 transitions, 5909 flow. Second operand 9 states and 211 transitions. [2024-06-14 11:24:11,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 511 transitions, 7345 flow [2024-06-14 11:24:13,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 511 transitions, 7039 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-14 11:24:13,475 INFO L231 Difference]: Finished difference. Result has 433 places, 469 transitions, 5823 flow [2024-06-14 11:24:13,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5609, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5823, PETRI_PLACES=433, PETRI_TRANSITIONS=469} [2024-06-14 11:24:13,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-14 11:24:13,476 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 469 transitions, 5823 flow [2024-06-14 11:24:13,476 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) [2024-06-14 11:24:13,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:13,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:13,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 11:24:13,476 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:24:13,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:13,476 INFO L85 PathProgramCache]: Analyzing trace with hash 638932553, now seen corresponding path program 1 times [2024-06-14 11:24:13,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:13,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464266340] [2024-06-14 11:24:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:13,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:13,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:13,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464266340] [2024-06-14 11:24:13,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464266340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:13,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:13,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:13,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820316468] [2024-06-14 11:24:13,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:13,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:13,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:13,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:13,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:13,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:13,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 469 transitions, 5823 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) [2024-06-14 11:24:13,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:13,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:13,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:14,716 INFO L124 PetriNetUnfolderBase]: 3311/5559 cut-off events. [2024-06-14 11:24:14,717 INFO L125 PetriNetUnfolderBase]: For 421051/421063 co-relation queries the response was YES. [2024-06-14 11:24:14,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38397 conditions, 5559 events. 3311/5559 cut-off events. For 421051/421063 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37718 event pairs, 742 based on Foata normal form. 18/5577 useless extension candidates. Maximal degree in co-relation 38208. Up to 4675 conditions per place. [2024-06-14 11:24:14,786 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 420 selfloop transitions, 81 changer transitions 0/507 dead transitions. [2024-06-14 11:24:14,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 507 transitions, 7288 flow [2024-06-14 11:24:14,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:24:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:24:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 11:24:14,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-14 11:24:14,787 INFO L175 Difference]: Start difference. First operand has 433 places, 469 transitions, 5823 flow. Second operand 9 states and 199 transitions. [2024-06-14 11:24:14,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 507 transitions, 7288 flow [2024-06-14 11:24:16,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 507 transitions, 6999 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 11:24:16,861 INFO L231 Difference]: Finished difference. Result has 437 places, 477 transitions, 5862 flow [2024-06-14 11:24:16,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5544, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5862, PETRI_PLACES=437, PETRI_TRANSITIONS=477} [2024-06-14 11:24:16,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-14 11:24:16,861 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 477 transitions, 5862 flow [2024-06-14 11:24:16,862 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) [2024-06-14 11:24:16,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:16,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:16,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 11:24:16,862 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:24:16,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash 638932181, now seen corresponding path program 2 times [2024-06-14 11:24:16,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:16,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781936144] [2024-06-14 11:24:16,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:16,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:16,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:16,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781936144] [2024-06-14 11:24:16,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781936144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:16,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:16,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:16,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320335399] [2024-06-14 11:24:16,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:16,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:16,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:16,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:16,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:17,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:17,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 477 transitions, 5862 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) [2024-06-14 11:24:17,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:17,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:17,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:18,094 INFO L124 PetriNetUnfolderBase]: 3331/5595 cut-off events. [2024-06-14 11:24:18,094 INFO L125 PetriNetUnfolderBase]: For 428257/428269 co-relation queries the response was YES. [2024-06-14 11:24:18,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38135 conditions, 5595 events. 3331/5595 cut-off events. For 428257/428269 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 37997 event pairs, 717 based on Foata normal form. 18/5613 useless extension candidates. Maximal degree in co-relation 37944. Up to 4203 conditions per place. [2024-06-14 11:24:18,163 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 412 selfloop transitions, 100 changer transitions 0/518 dead transitions. [2024-06-14 11:24:18,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 518 transitions, 7315 flow [2024-06-14 11:24:18,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:24:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:24:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 11:24:18,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 11:24:18,164 INFO L175 Difference]: Start difference. First operand has 437 places, 477 transitions, 5862 flow. Second operand 9 states and 210 transitions. [2024-06-14 11:24:18,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 518 transitions, 7315 flow [2024-06-14 11:24:19,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 518 transitions, 7159 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 11:24:19,908 INFO L231 Difference]: Finished difference. Result has 440 places, 478 transitions, 5926 flow [2024-06-14 11:24:19,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5708, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5926, PETRI_PLACES=440, PETRI_TRANSITIONS=478} [2024-06-14 11:24:19,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-14 11:24:19,909 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 478 transitions, 5926 flow [2024-06-14 11:24:19,909 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) [2024-06-14 11:24:19,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:19,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:19,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 11:24:19,909 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:24:19,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:19,909 INFO L85 PathProgramCache]: Analyzing trace with hash 727497941, now seen corresponding path program 3 times [2024-06-14 11:24:19,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:19,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650739976] [2024-06-14 11:24:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:19,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:20,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:20,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650739976] [2024-06-14 11:24:20,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650739976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:20,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:20,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:20,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368031761] [2024-06-14 11:24:20,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:20,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:20,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:20,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:20,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:20,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:20,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 478 transitions, 5926 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) [2024-06-14 11:24:20,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:20,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:20,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:21,205 INFO L124 PetriNetUnfolderBase]: 3351/5625 cut-off events. [2024-06-14 11:24:21,206 INFO L125 PetriNetUnfolderBase]: For 429283/429295 co-relation queries the response was YES. [2024-06-14 11:24:21,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38442 conditions, 5625 events. 3351/5625 cut-off events. For 429283/429295 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 38241 event pairs, 804 based on Foata normal form. 18/5641 useless extension candidates. Maximal degree in co-relation 38251. Up to 4891 conditions per place. [2024-06-14 11:24:21,276 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 418 selfloop transitions, 88 changer transitions 0/512 dead transitions. [2024-06-14 11:24:21,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 512 transitions, 7093 flow [2024-06-14 11:24:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:24:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:24:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 11:24:21,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 11:24:21,277 INFO L175 Difference]: Start difference. First operand has 440 places, 478 transitions, 5926 flow. Second operand 10 states and 219 transitions. [2024-06-14 11:24:21,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 512 transitions, 7093 flow [2024-06-14 11:24:23,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 512 transitions, 6936 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:24:23,455 INFO L231 Difference]: Finished difference. Result has 444 places, 479 transitions, 5967 flow [2024-06-14 11:24:23,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5770, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5967, PETRI_PLACES=444, PETRI_TRANSITIONS=479} [2024-06-14 11:24:23,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-14 11:24:23,456 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 479 transitions, 5967 flow [2024-06-14 11:24:23,456 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) [2024-06-14 11:24:23,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:23,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:23,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 11:24:23,456 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:24:23,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:23,457 INFO L85 PathProgramCache]: Analyzing trace with hash 727646183, now seen corresponding path program 2 times [2024-06-14 11:24:23,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:23,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597619644] [2024-06-14 11:24:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:23,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:23,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:23,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597619644] [2024-06-14 11:24:23,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597619644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:23,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:23,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:23,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604727760] [2024-06-14 11:24:23,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:23,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:23,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:23,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:23,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:23,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:23,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 479 transitions, 5967 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) [2024-06-14 11:24:23,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:23,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:23,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:24,659 INFO L124 PetriNetUnfolderBase]: 3379/5675 cut-off events. [2024-06-14 11:24:24,659 INFO L125 PetriNetUnfolderBase]: For 449554/449566 co-relation queries the response was YES. [2024-06-14 11:24:24,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38788 conditions, 5675 events. 3379/5675 cut-off events. For 449554/449566 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 38712 event pairs, 818 based on Foata normal form. 20/5695 useless extension candidates. Maximal degree in co-relation 38596. Up to 5064 conditions per place. [2024-06-14 11:24:24,730 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 427 selfloop transitions, 67 changer transitions 0/500 dead transitions. [2024-06-14 11:24:24,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 500 transitions, 7068 flow [2024-06-14 11:24:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:24:24,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:24:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 11:24:24,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 11:24:24,731 INFO L175 Difference]: Start difference. First operand has 444 places, 479 transitions, 5967 flow. Second operand 9 states and 192 transitions. [2024-06-14 11:24:24,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 500 transitions, 7068 flow [2024-06-14 11:24:26,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 500 transitions, 6891 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:24:26,864 INFO L231 Difference]: Finished difference. Result has 445 places, 480 transitions, 5961 flow [2024-06-14 11:24:26,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5790, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5961, PETRI_PLACES=445, PETRI_TRANSITIONS=480} [2024-06-14 11:24:26,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-14 11:24:26,865 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 480 transitions, 5961 flow [2024-06-14 11:24:26,865 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) [2024-06-14 11:24:26,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:26,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:26,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 11:24:26,865 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:24:26,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash 640806503, now seen corresponding path program 3 times [2024-06-14 11:24:26,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:26,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639791064] [2024-06-14 11:24:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:26,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:27,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:27,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639791064] [2024-06-14 11:24:27,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639791064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:27,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:27,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:27,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385899845] [2024-06-14 11:24:27,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:27,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:27,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:27,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:27,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:27,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:27,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 480 transitions, 5961 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) [2024-06-14 11:24:27,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:27,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:27,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:28,091 INFO L124 PetriNetUnfolderBase]: 3399/5705 cut-off events. [2024-06-14 11:24:28,091 INFO L125 PetriNetUnfolderBase]: For 445312/445324 co-relation queries the response was YES. [2024-06-14 11:24:28,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39048 conditions, 5705 events. 3399/5705 cut-off events. For 445312/445324 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 38917 event pairs, 806 based on Foata normal form. 18/5723 useless extension candidates. Maximal degree in co-relation 38855. Up to 5036 conditions per place. [2024-06-14 11:24:28,164 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 427 selfloop transitions, 73 changer transitions 0/506 dead transitions. [2024-06-14 11:24:28,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 506 transitions, 7114 flow [2024-06-14 11:24:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:24:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:24:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-14 11:24:28,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-14 11:24:28,165 INFO L175 Difference]: Start difference. First operand has 445 places, 480 transitions, 5961 flow. Second operand 10 states and 212 transitions. [2024-06-14 11:24:28,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 506 transitions, 7114 flow [2024-06-14 11:24:30,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 506 transitions, 6974 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 11:24:30,391 INFO L231 Difference]: Finished difference. Result has 449 places, 482 transitions, 6026 flow [2024-06-14 11:24:30,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5821, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6026, PETRI_PLACES=449, PETRI_TRANSITIONS=482} [2024-06-14 11:24:30,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-14 11:24:30,391 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 482 transitions, 6026 flow [2024-06-14 11:24:30,391 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) [2024-06-14 11:24:30,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:30,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:30,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 11:24:30,392 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:24:30,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:30,392 INFO L85 PathProgramCache]: Analyzing trace with hash -172283289, now seen corresponding path program 4 times [2024-06-14 11:24:30,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:30,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780582891] [2024-06-14 11:24:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:30,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:30,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:30,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780582891] [2024-06-14 11:24:30,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780582891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:30,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:30,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:30,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658509974] [2024-06-14 11:24:30,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:30,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:30,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:30,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:30,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:30,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:30,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 482 transitions, 6026 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) [2024-06-14 11:24:30,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:30,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:30,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:31,674 INFO L124 PetriNetUnfolderBase]: 3427/5751 cut-off events. [2024-06-14 11:24:31,675 INFO L125 PetriNetUnfolderBase]: For 467205/467217 co-relation queries the response was YES. [2024-06-14 11:24:31,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39568 conditions, 5751 events. 3427/5751 cut-off events. For 467205/467217 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 39348 event pairs, 826 based on Foata normal form. 20/5771 useless extension candidates. Maximal degree in co-relation 39373. Up to 5171 conditions per place. [2024-06-14 11:24:31,748 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 447 selfloop transitions, 48 changer transitions 0/501 dead transitions. [2024-06-14 11:24:31,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 501 transitions, 7129 flow [2024-06-14 11:24:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:24:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:24:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 11:24:31,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 11:24:31,749 INFO L175 Difference]: Start difference. First operand has 449 places, 482 transitions, 6026 flow. Second operand 7 states and 157 transitions. [2024-06-14 11:24:31,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 501 transitions, 7129 flow [2024-06-14 11:24:34,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 501 transitions, 6975 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 11:24:34,054 INFO L231 Difference]: Finished difference. Result has 448 places, 483 transitions, 6009 flow [2024-06-14 11:24:34,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5872, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6009, PETRI_PLACES=448, PETRI_TRANSITIONS=483} [2024-06-14 11:24:34,055 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-14 11:24:34,055 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 483 transitions, 6009 flow [2024-06-14 11:24:34,055 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) [2024-06-14 11:24:34,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:34,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:34,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 11:24:34,055 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:24:34,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:34,056 INFO L85 PathProgramCache]: Analyzing trace with hash -166920909, now seen corresponding path program 5 times [2024-06-14 11:24:34,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:34,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741437399] [2024-06-14 11:24:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:34,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:34,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:34,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741437399] [2024-06-14 11:24:34,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741437399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:34,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:34,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:34,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902568533] [2024-06-14 11:24:34,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:34,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:34,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:34,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:34,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:34,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:34,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 483 transitions, 6009 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) [2024-06-14 11:24:34,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:34,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:34,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:35,360 INFO L124 PetriNetUnfolderBase]: 3455/5799 cut-off events. [2024-06-14 11:24:35,360 INFO L125 PetriNetUnfolderBase]: For 468072/468084 co-relation queries the response was YES. [2024-06-14 11:24:35,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39869 conditions, 5799 events. 3455/5799 cut-off events. For 468072/468084 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 39722 event pairs, 832 based on Foata normal form. 20/5819 useless extension candidates. Maximal degree in co-relation 39674. Up to 5215 conditions per place. [2024-06-14 11:24:35,438 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 449 selfloop transitions, 48 changer transitions 0/503 dead transitions. [2024-06-14 11:24:35,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 503 transitions, 7120 flow [2024-06-14 11:24:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:24:35,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:24:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 11:24:35,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 11:24:35,439 INFO L175 Difference]: Start difference. First operand has 448 places, 483 transitions, 6009 flow. Second operand 8 states and 174 transitions. [2024-06-14 11:24:35,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 503 transitions, 7120 flow [2024-06-14 11:24:37,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 503 transitions, 7014 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 11:24:37,803 INFO L231 Difference]: Finished difference. Result has 451 places, 484 transitions, 6042 flow [2024-06-14 11:24:37,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5903, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6042, PETRI_PLACES=451, PETRI_TRANSITIONS=484} [2024-06-14 11:24:37,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-14 11:24:37,804 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 484 transitions, 6042 flow [2024-06-14 11:24:37,804 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) [2024-06-14 11:24:37,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:37,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:37,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 11:24:37,804 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:24:37,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:37,805 INFO L85 PathProgramCache]: Analyzing trace with hash -172431159, now seen corresponding path program 6 times [2024-06-14 11:24:37,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:37,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636444166] [2024-06-14 11:24:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:37,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:37,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:37,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636444166] [2024-06-14 11:24:37,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636444166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:37,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:37,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:37,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381645508] [2024-06-14 11:24:37,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:37,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:37,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:37,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:37,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:38,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:38,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 484 transitions, 6042 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) [2024-06-14 11:24:38,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:38,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:38,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:39,160 INFO L124 PetriNetUnfolderBase]: 3500/5870 cut-off events. [2024-06-14 11:24:39,160 INFO L125 PetriNetUnfolderBase]: For 463195/463207 co-relation queries the response was YES. [2024-06-14 11:24:39,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40386 conditions, 5870 events. 3500/5870 cut-off events. For 463195/463207 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 40142 event pairs, 760 based on Foata normal form. 18/5888 useless extension candidates. Maximal degree in co-relation 40190. Up to 5126 conditions per place. [2024-06-14 11:24:39,227 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 450 selfloop transitions, 57 changer transitions 0/513 dead transitions. [2024-06-14 11:24:39,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 513 transitions, 7256 flow [2024-06-14 11:24:39,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:24:39,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:24:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 11:24:39,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 11:24:39,228 INFO L175 Difference]: Start difference. First operand has 451 places, 484 transitions, 6042 flow. Second operand 7 states and 163 transitions. [2024-06-14 11:24:39,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 513 transitions, 7256 flow [2024-06-14 11:24:41,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 513 transitions, 7148 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 11:24:41,298 INFO L231 Difference]: Finished difference. Result has 453 places, 489 transitions, 6169 flow [2024-06-14 11:24:41,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5934, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6169, PETRI_PLACES=453, PETRI_TRANSITIONS=489} [2024-06-14 11:24:41,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-14 11:24:41,299 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 489 transitions, 6169 flow [2024-06-14 11:24:41,299 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) [2024-06-14 11:24:41,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:41,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:41,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 11:24:41,300 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:24:41,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash -172431531, now seen corresponding path program 4 times [2024-06-14 11:24:41,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:41,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369967261] [2024-06-14 11:24:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:41,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:41,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:41,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369967261] [2024-06-14 11:24:41,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369967261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:41,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:41,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:41,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650517133] [2024-06-14 11:24:41,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:41,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:41,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:41,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:41,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:41,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:41,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 489 transitions, 6169 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) [2024-06-14 11:24:41,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:41,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:41,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:42,657 INFO L124 PetriNetUnfolderBase]: 3487/5853 cut-off events. [2024-06-14 11:24:42,657 INFO L125 PetriNetUnfolderBase]: For 430656/430668 co-relation queries the response was YES. [2024-06-14 11:24:42,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39802 conditions, 5853 events. 3487/5853 cut-off events. For 430656/430668 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 40140 event pairs, 721 based on Foata normal form. 18/5871 useless extension candidates. Maximal degree in co-relation 39604. Up to 4754 conditions per place. [2024-06-14 11:24:42,741 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 434 selfloop transitions, 82 changer transitions 0/522 dead transitions. [2024-06-14 11:24:42,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 522 transitions, 7343 flow [2024-06-14 11:24:42,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:24:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:24:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:24:42,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-14 11:24:42,742 INFO L175 Difference]: Start difference. First operand has 453 places, 489 transitions, 6169 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:24:42,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 522 transitions, 7343 flow [2024-06-14 11:24:44,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 522 transitions, 7222 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 11:24:44,843 INFO L231 Difference]: Finished difference. Result has 455 places, 489 transitions, 6222 flow [2024-06-14 11:24:44,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6048, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6222, PETRI_PLACES=455, PETRI_TRANSITIONS=489} [2024-06-14 11:24:44,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-14 11:24:44,843 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 489 transitions, 6222 flow [2024-06-14 11:24:44,843 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) [2024-06-14 11:24:44,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:44,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:44,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 11:24:44,844 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:24:44,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash -166705707, now seen corresponding path program 1 times [2024-06-14 11:24:44,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:44,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94838770] [2024-06-14 11:24:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:44,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:44,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:44,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94838770] [2024-06-14 11:24:44,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94838770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:44,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:44,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:44,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961496784] [2024-06-14 11:24:44,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:44,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:44,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:44,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:44,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:45,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:45,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 489 transitions, 6222 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) [2024-06-14 11:24:45,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:45,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:45,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:46,153 INFO L124 PetriNetUnfolderBase]: 3507/5887 cut-off events. [2024-06-14 11:24:46,153 INFO L125 PetriNetUnfolderBase]: For 431909/431921 co-relation queries the response was YES. [2024-06-14 11:24:46,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40032 conditions, 5887 events. 3507/5887 cut-off events. For 431909/431921 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 40307 event pairs, 798 based on Foata normal form. 18/5905 useless extension candidates. Maximal degree in co-relation 39834. Up to 5155 conditions per place. [2024-06-14 11:24:46,228 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 448 selfloop transitions, 58 changer transitions 0/512 dead transitions. [2024-06-14 11:24:46,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 512 transitions, 7368 flow [2024-06-14 11:24:46,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:24:46,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:24:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 11:24:46,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 11:24:46,229 INFO L175 Difference]: Start difference. First operand has 455 places, 489 transitions, 6222 flow. Second operand 8 states and 177 transitions. [2024-06-14 11:24:46,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 512 transitions, 7368 flow [2024-06-14 11:24:48,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 512 transitions, 7139 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 11:24:48,559 INFO L231 Difference]: Finished difference. Result has 455 places, 490 transitions, 6143 flow [2024-06-14 11:24:48,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5993, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6143, PETRI_PLACES=455, PETRI_TRANSITIONS=490} [2024-06-14 11:24:48,559 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-14 11:24:48,559 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 490 transitions, 6143 flow [2024-06-14 11:24:48,559 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) [2024-06-14 11:24:48,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:48,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:48,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 11:24:48,559 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:24:48,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:48,560 INFO L85 PathProgramCache]: Analyzing trace with hash -166705893, now seen corresponding path program 1 times [2024-06-14 11:24:48,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:48,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099849894] [2024-06-14 11:24:48,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:48,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:48,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:48,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099849894] [2024-06-14 11:24:48,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099849894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:48,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:48,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:48,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180497072] [2024-06-14 11:24:48,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:48,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:48,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:48,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:48,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:48,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:48,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 490 transitions, 6143 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) [2024-06-14 11:24:48,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:48,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:48,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:49,914 INFO L124 PetriNetUnfolderBase]: 3543/5943 cut-off events. [2024-06-14 11:24:49,914 INFO L125 PetriNetUnfolderBase]: For 424883/424895 co-relation queries the response was YES. [2024-06-14 11:24:49,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40129 conditions, 5943 events. 3543/5943 cut-off events. For 424883/424895 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 40767 event pairs, 748 based on Foata normal form. 18/5961 useless extension candidates. Maximal degree in co-relation 39931. Up to 5137 conditions per place. [2024-06-14 11:24:49,990 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 442 selfloop transitions, 72 changer transitions 0/520 dead transitions. [2024-06-14 11:24:49,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 520 transitions, 7359 flow [2024-06-14 11:24:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:24:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:24:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 11:24:49,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 11:24:49,991 INFO L175 Difference]: Start difference. First operand has 455 places, 490 transitions, 6143 flow. Second operand 8 states and 180 transitions. [2024-06-14 11:24:49,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 520 transitions, 7359 flow [2024-06-14 11:24:52,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 520 transitions, 7218 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 11:24:52,183 INFO L231 Difference]: Finished difference. Result has 457 places, 495 transitions, 6255 flow [2024-06-14 11:24:52,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6009, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6255, PETRI_PLACES=457, PETRI_TRANSITIONS=495} [2024-06-14 11:24:52,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-14 11:24:52,184 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 495 transitions, 6255 flow [2024-06-14 11:24:52,184 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) [2024-06-14 11:24:52,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:52,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:52,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 11:24:52,184 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:24:52,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:52,184 INFO L85 PathProgramCache]: Analyzing trace with hash 463974589, now seen corresponding path program 2 times [2024-06-14 11:24:52,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:52,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755039189] [2024-06-14 11:24:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:52,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:52,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:52,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755039189] [2024-06-14 11:24:52,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755039189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:52,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:52,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:52,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609711173] [2024-06-14 11:24:52,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:52,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:52,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:52,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:52,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:52,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:52,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 495 transitions, 6255 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) [2024-06-14 11:24:52,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:52,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:52,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:53,557 INFO L124 PetriNetUnfolderBase]: 3563/5975 cut-off events. [2024-06-14 11:24:53,557 INFO L125 PetriNetUnfolderBase]: For 425459/425471 co-relation queries the response was YES. [2024-06-14 11:24:53,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40517 conditions, 5975 events. 3563/5975 cut-off events. For 425459/425471 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 40971 event pairs, 804 based on Foata normal form. 18/5993 useless extension candidates. Maximal degree in co-relation 40318. Up to 5423 conditions per place. [2024-06-14 11:24:53,635 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 471 selfloop transitions, 35 changer transitions 0/512 dead transitions. [2024-06-14 11:24:53,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 512 transitions, 7351 flow [2024-06-14 11:24:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:24:53,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:24:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 11:24:53,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-14 11:24:53,636 INFO L175 Difference]: Start difference. First operand has 457 places, 495 transitions, 6255 flow. Second operand 7 states and 151 transitions. [2024-06-14 11:24:53,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 512 transitions, 7351 flow [2024-06-14 11:24:55,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 512 transitions, 7218 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:24:55,688 INFO L231 Difference]: Finished difference. Result has 458 places, 496 transitions, 6224 flow [2024-06-14 11:24:55,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6122, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6224, PETRI_PLACES=458, PETRI_TRANSITIONS=496} [2024-06-14 11:24:55,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-14 11:24:55,689 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 496 transitions, 6224 flow [2024-06-14 11:24:55,689 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) [2024-06-14 11:24:55,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:55,689 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, 1, 1] [2024-06-14 11:24:55,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-14 11:24:55,689 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:24:55,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:55,689 INFO L85 PathProgramCache]: Analyzing trace with hash 463854619, now seen corresponding path program 3 times [2024-06-14 11:24:55,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:55,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644014244] [2024-06-14 11:24:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:55,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:55,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:55,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644014244] [2024-06-14 11:24:55,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644014244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:55,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:55,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:55,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136819770] [2024-06-14 11:24:55,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:55,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:55,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:55,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:55,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:55,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 496 transitions, 6224 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) [2024-06-14 11:24:55,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:55,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:55,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:24:57,085 INFO L124 PetriNetUnfolderBase]: 3583/6009 cut-off events. [2024-06-14 11:24:57,085 INFO L125 PetriNetUnfolderBase]: For 426092/426096 co-relation queries the response was YES. [2024-06-14 11:24:57,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40580 conditions, 6009 events. 3583/6009 cut-off events. For 426092/426096 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 41161 event pairs, 831 based on Foata normal form. 10/6018 useless extension candidates. Maximal degree in co-relation 40381. Up to 4769 conditions per place. [2024-06-14 11:24:57,153 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 412 selfloop transitions, 100 changer transitions 0/518 dead transitions. [2024-06-14 11:24:57,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 518 transitions, 7410 flow [2024-06-14 11:24:57,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:24:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:24:57,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 11:24:57,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 11:24:57,154 INFO L175 Difference]: Start difference. First operand has 458 places, 496 transitions, 6224 flow. Second operand 7 states and 157 transitions. [2024-06-14 11:24:57,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 518 transitions, 7410 flow [2024-06-14 11:24:59,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 518 transitions, 7236 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 11:24:59,304 INFO L231 Difference]: Finished difference. Result has 458 places, 497 transitions, 6284 flow [2024-06-14 11:24:59,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6050, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6284, PETRI_PLACES=458, PETRI_TRANSITIONS=497} [2024-06-14 11:24:59,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-14 11:24:59,305 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 497 transitions, 6284 flow [2024-06-14 11:24:59,305 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) [2024-06-14 11:24:59,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:24:59,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:24:59,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-14 11:24:59,305 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:24:59,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:24:59,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2040804551, now seen corresponding path program 27 times [2024-06-14 11:24:59,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:24:59,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266571653] [2024-06-14 11:24:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:24:59,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:24:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:24:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:24:59,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:24:59,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266571653] [2024-06-14 11:24:59,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266571653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:24:59,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:24:59,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:24:59,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054921381] [2024-06-14 11:24:59,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:24:59,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:24:59,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:24:59,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:24:59,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:24:59,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:24:59,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 497 transitions, 6284 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) [2024-06-14 11:24:59,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:24:59,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:24:59,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:00,603 INFO L124 PetriNetUnfolderBase]: 3611/6055 cut-off events. [2024-06-14 11:25:00,604 INFO L125 PetriNetUnfolderBase]: For 448062/448074 co-relation queries the response was YES. [2024-06-14 11:25:00,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40977 conditions, 6055 events. 3611/6055 cut-off events. For 448062/448074 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 41655 event pairs, 867 based on Foata normal form. 20/6075 useless extension candidates. Maximal degree in co-relation 40779. Up to 5431 conditions per place. [2024-06-14 11:25:00,679 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 445 selfloop transitions, 70 changer transitions 0/521 dead transitions. [2024-06-14 11:25:00,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 521 transitions, 7442 flow [2024-06-14 11:25:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:25:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:25:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 11:25:00,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 11:25:00,680 INFO L175 Difference]: Start difference. First operand has 458 places, 497 transitions, 6284 flow. Second operand 9 states and 195 transitions. [2024-06-14 11:25:00,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 521 transitions, 7442 flow [2024-06-14 11:25:02,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 521 transitions, 7226 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 11:25:02,583 INFO L231 Difference]: Finished difference. Result has 462 places, 498 transitions, 6248 flow [2024-06-14 11:25:02,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6068, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6248, PETRI_PLACES=462, PETRI_TRANSITIONS=498} [2024-06-14 11:25:02,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-14 11:25:02,584 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 498 transitions, 6248 flow [2024-06-14 11:25:02,584 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) [2024-06-14 11:25:02,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:02,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:25:02,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-14 11:25:02,584 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:02,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:02,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2019255751, now seen corresponding path program 28 times [2024-06-14 11:25:02,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:02,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009139535] [2024-06-14 11:25:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:02,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:25:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:25:02,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:25:02,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009139535] [2024-06-14 11:25:02,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009139535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:25:02,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:25:02,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:25:02,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632283213] [2024-06-14 11:25:02,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:25:02,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:25:02,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:25:02,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:25:02,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:25:02,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:25:02,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 498 transitions, 6248 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) [2024-06-14 11:25:02,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:25:02,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:25:02,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:03,886 INFO L124 PetriNetUnfolderBase]: 3639/6097 cut-off events. [2024-06-14 11:25:03,886 INFO L125 PetriNetUnfolderBase]: For 454985/454989 co-relation queries the response was YES. [2024-06-14 11:25:03,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41148 conditions, 6097 events. 3639/6097 cut-off events. For 454985/454989 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 42077 event pairs, 895 based on Foata normal form. 12/6108 useless extension candidates. Maximal degree in co-relation 40949. Up to 5468 conditions per place. [2024-06-14 11:25:03,964 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 420 selfloop transitions, 89 changer transitions 0/515 dead transitions. [2024-06-14 11:25:03,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 515 transitions, 7378 flow [2024-06-14 11:25:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:25:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:25:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 11:25:03,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-14 11:25:03,965 INFO L175 Difference]: Start difference. First operand has 462 places, 498 transitions, 6248 flow. Second operand 8 states and 170 transitions. [2024-06-14 11:25:03,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 515 transitions, 7378 flow [2024-06-14 11:25:05,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 515 transitions, 7228 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 11:25:05,913 INFO L231 Difference]: Finished difference. Result has 463 places, 499 transitions, 6315 flow [2024-06-14 11:25:05,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6098, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6315, PETRI_PLACES=463, PETRI_TRANSITIONS=499} [2024-06-14 11:25:05,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-14 11:25:05,914 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 499 transitions, 6315 flow [2024-06-14 11:25:05,914 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) [2024-06-14 11:25:05,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:05,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:25:05,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-14 11:25:05,914 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:05,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:05,914 INFO L85 PathProgramCache]: Analyzing trace with hash -2022112711, now seen corresponding path program 29 times [2024-06-14 11:25:05,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:05,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665842527] [2024-06-14 11:25:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:05,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:25:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:25:06,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:25:06,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665842527] [2024-06-14 11:25:06,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665842527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:25:06,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:25:06,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:25:06,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150869395] [2024-06-14 11:25:06,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:25:06,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:25:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:25:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:25:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:25:06,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:25:06,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 499 transitions, 6315 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) [2024-06-14 11:25:06,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:25:06,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:25:06,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:07,233 INFO L124 PetriNetUnfolderBase]: 3654/6122 cut-off events. [2024-06-14 11:25:07,233 INFO L125 PetriNetUnfolderBase]: For 448090/448094 co-relation queries the response was YES. [2024-06-14 11:25:07,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41135 conditions, 6122 events. 3654/6122 cut-off events. For 448090/448094 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 42158 event pairs, 892 based on Foata normal form. 12/6133 useless extension candidates. Maximal degree in co-relation 40935. Up to 5385 conditions per place. [2024-06-14 11:25:07,313 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 423 selfloop transitions, 91 changer transitions 0/520 dead transitions. [2024-06-14 11:25:07,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 520 transitions, 7509 flow [2024-06-14 11:25:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:25:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:25:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 11:25:07,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-14 11:25:07,313 INFO L175 Difference]: Start difference. First operand has 463 places, 499 transitions, 6315 flow. Second operand 8 states and 173 transitions. [2024-06-14 11:25:07,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 520 transitions, 7509 flow [2024-06-14 11:25:09,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 520 transitions, 7316 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 11:25:09,596 INFO L231 Difference]: Finished difference. Result has 465 places, 500 transitions, 6344 flow [2024-06-14 11:25:09,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6122, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6344, PETRI_PLACES=465, PETRI_TRANSITIONS=500} [2024-06-14 11:25:09,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-14 11:25:09,596 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 500 transitions, 6344 flow [2024-06-14 11:25:09,597 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) [2024-06-14 11:25:09,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:09,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:25:09,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-14 11:25:09,597 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:09,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:09,597 INFO L85 PathProgramCache]: Analyzing trace with hash -827762871, now seen corresponding path program 7 times [2024-06-14 11:25:09,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:09,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093909759] [2024-06-14 11:25:09,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:09,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:25:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:25:09,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:25:09,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093909759] [2024-06-14 11:25:09,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093909759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:25:09,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:25:09,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:25:09,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079288353] [2024-06-14 11:25:09,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:25:09,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:25:09,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:25:09,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:25:09,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:25:09,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:25:09,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 500 transitions, 6344 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) [2024-06-14 11:25:09,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:25:09,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:25:09,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:10,998 INFO L124 PetriNetUnfolderBase]: 3715/6225 cut-off events. [2024-06-14 11:25:10,998 INFO L125 PetriNetUnfolderBase]: For 482928/482940 co-relation queries the response was YES. [2024-06-14 11:25:11,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42558 conditions, 6225 events. 3715/6225 cut-off events. For 482928/482940 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 42956 event pairs, 799 based on Foata normal form. 18/6243 useless extension candidates. Maximal degree in co-relation 42357. Up to 5469 conditions per place. [2024-06-14 11:25:11,082 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 472 selfloop transitions, 59 changer transitions 0/537 dead transitions. [2024-06-14 11:25:11,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 537 transitions, 7839 flow [2024-06-14 11:25:11,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:25:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:25:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 11:25:11,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-14 11:25:11,083 INFO L175 Difference]: Start difference. First operand has 465 places, 500 transitions, 6344 flow. Second operand 9 states and 196 transitions. [2024-06-14 11:25:11,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 537 transitions, 7839 flow [2024-06-14 11:25:13,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 537 transitions, 7639 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:25:13,195 INFO L231 Difference]: Finished difference. Result has 468 places, 505 transitions, 6347 flow [2024-06-14 11:25:13,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6144, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6347, PETRI_PLACES=468, PETRI_TRANSITIONS=505} [2024-06-14 11:25:13,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-14 11:25:13,195 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 505 transitions, 6347 flow [2024-06-14 11:25:13,195 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) [2024-06-14 11:25:13,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:13,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:25:13,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-14 11:25:13,196 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:13,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash -473499831, now seen corresponding path program 8 times [2024-06-14 11:25:13,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:13,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592054422] [2024-06-14 11:25:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:13,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:25:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:25:13,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:25:13,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592054422] [2024-06-14 11:25:13,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592054422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:25:13,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:25:13,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:25:13,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929576766] [2024-06-14 11:25:13,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:25:13,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:25:13,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:25:13,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:25:13,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:25:13,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:25:13,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 505 transitions, 6347 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) [2024-06-14 11:25:13,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:25:13,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:25:13,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:14,646 INFO L124 PetriNetUnfolderBase]: 3735/6263 cut-off events. [2024-06-14 11:25:14,646 INFO L125 PetriNetUnfolderBase]: For 490036/490048 co-relation queries the response was YES. [2024-06-14 11:25:14,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42779 conditions, 6263 events. 3735/6263 cut-off events. For 490036/490048 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 43310 event pairs, 804 based on Foata normal form. 18/6281 useless extension candidates. Maximal degree in co-relation 42577. Up to 5546 conditions per place. [2024-06-14 11:25:14,721 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 465 selfloop transitions, 59 changer transitions 0/530 dead transitions. [2024-06-14 11:25:14,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 530 transitions, 7503 flow [2024-06-14 11:25:14,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:25:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:25:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 11:25:14,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 11:25:14,722 INFO L175 Difference]: Start difference. First operand has 468 places, 505 transitions, 6347 flow. Second operand 8 states and 174 transitions. [2024-06-14 11:25:14,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 530 transitions, 7503 flow [2024-06-14 11:25:17,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 530 transitions, 7344 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 11:25:17,108 INFO L231 Difference]: Finished difference. Result has 471 places, 506 transitions, 6342 flow [2024-06-14 11:25:17,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6342, PETRI_PLACES=471, PETRI_TRANSITIONS=506} [2024-06-14 11:25:17,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-14 11:25:17,108 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 506 transitions, 6342 flow [2024-06-14 11:25:17,109 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) [2024-06-14 11:25:17,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:17,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:25:17,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-14 11:25:17,109 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:17,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:17,109 INFO L85 PathProgramCache]: Analyzing trace with hash -473084121, now seen corresponding path program 9 times [2024-06-14 11:25:17,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:17,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494108255] [2024-06-14 11:25:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:17,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:25:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:25:17,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:25:17,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494108255] [2024-06-14 11:25:17,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494108255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:25:17,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:25:17,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:25:17,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159516227] [2024-06-14 11:25:17,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:25:17,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:25:17,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:25:17,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:25:17,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:25:17,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:25:17,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 506 transitions, 6342 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) [2024-06-14 11:25:17,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:25:17,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:25:17,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:18,480 INFO L124 PetriNetUnfolderBase]: 3788/6346 cut-off events. [2024-06-14 11:25:18,480 INFO L125 PetriNetUnfolderBase]: For 540701/540713 co-relation queries the response was YES. [2024-06-14 11:25:18,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43880 conditions, 6346 events. 3788/6346 cut-off events. For 540701/540713 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 43915 event pairs, 869 based on Foata normal form. 18/6364 useless extension candidates. Maximal degree in co-relation 43679. Up to 4951 conditions per place. [2024-06-14 11:25:18,563 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 435 selfloop transitions, 97 changer transitions 0/538 dead transitions. [2024-06-14 11:25:18,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 538 transitions, 7858 flow [2024-06-14 11:25:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:25:18,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:25:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 11:25:18,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 11:25:18,564 INFO L175 Difference]: Start difference. First operand has 471 places, 506 transitions, 6342 flow. Second operand 8 states and 182 transitions. [2024-06-14 11:25:18,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 538 transitions, 7858 flow [2024-06-14 11:25:21,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 538 transitions, 7699 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 11:25:21,230 INFO L231 Difference]: Finished difference. Result has 470 places, 508 transitions, 6449 flow [2024-06-14 11:25:21,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6189, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6449, PETRI_PLACES=470, PETRI_TRANSITIONS=508} [2024-06-14 11:25:21,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-14 11:25:21,231 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 508 transitions, 6449 flow [2024-06-14 11:25:21,231 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) [2024-06-14 11:25:21,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:21,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:25:21,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-14 11:25:21,231 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:21,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:21,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1118631611, now seen corresponding path program 10 times [2024-06-14 11:25:21,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:21,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136860089] [2024-06-14 11:25:21,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:21,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:25:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:25:21,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:25:21,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136860089] [2024-06-14 11:25:21,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136860089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:25:21,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:25:21,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:25:21,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030623658] [2024-06-14 11:25:21,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:25:21,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:25:21,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:25:21,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:25:21,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:25:21,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:25:21,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 508 transitions, 6449 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) [2024-06-14 11:25:21,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:25:21,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:25:21,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:22,660 INFO L124 PetriNetUnfolderBase]: 3862/6460 cut-off events. [2024-06-14 11:25:22,660 INFO L125 PetriNetUnfolderBase]: For 600572/600584 co-relation queries the response was YES. [2024-06-14 11:25:22,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45842 conditions, 6460 events. 3862/6460 cut-off events. For 600572/600584 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 44856 event pairs, 966 based on Foata normal form. 20/6480 useless extension candidates. Maximal degree in co-relation 45643. Up to 5711 conditions per place. [2024-06-14 11:25:22,746 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 454 selfloop transitions, 74 changer transitions 0/534 dead transitions. [2024-06-14 11:25:22,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 534 transitions, 7939 flow [2024-06-14 11:25:22,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:25:22,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:25:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 11:25:22,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 11:25:22,747 INFO L175 Difference]: Start difference. First operand has 470 places, 508 transitions, 6449 flow. Second operand 8 states and 177 transitions. [2024-06-14 11:25:22,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 534 transitions, 7939 flow [2024-06-14 11:25:25,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 534 transitions, 7820 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 11:25:25,376 INFO L231 Difference]: Finished difference. Result has 474 places, 510 transitions, 6548 flow [2024-06-14 11:25:25,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6330, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6548, PETRI_PLACES=474, PETRI_TRANSITIONS=510} [2024-06-14 11:25:25,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-14 11:25:25,376 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 510 transitions, 6548 flow [2024-06-14 11:25:25,376 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) [2024-06-14 11:25:25,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:25,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:25:25,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-14 11:25:25,376 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:25,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:25,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1261150391, now seen corresponding path program 11 times [2024-06-14 11:25:25,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:25,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871562286] [2024-06-14 11:25:25,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:25,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:25:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:25:25,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:25:25,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871562286] [2024-06-14 11:25:25,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871562286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:25:25,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:25:25,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:25:25,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539613332] [2024-06-14 11:25:25,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:25:25,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:25:25,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:25:25,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:25:25,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:25:25,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:25:25,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 510 transitions, 6548 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) [2024-06-14 11:25:25,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:25:25,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:25:25,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:26,867 INFO L124 PetriNetUnfolderBase]: 3882/6490 cut-off events. [2024-06-14 11:25:26,867 INFO L125 PetriNetUnfolderBase]: For 595406/595418 co-relation queries the response was YES. [2024-06-14 11:25:26,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46216 conditions, 6490 events. 3882/6490 cut-off events. For 595406/595418 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 45077 event pairs, 970 based on Foata normal form. 18/6504 useless extension candidates. Maximal degree in co-relation 46015. Up to 5914 conditions per place. [2024-06-14 11:25:26,950 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 484 selfloop transitions, 41 changer transitions 0/531 dead transitions. [2024-06-14 11:25:26,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 531 transitions, 7694 flow [2024-06-14 11:25:26,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:25:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:25:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 11:25:26,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-14 11:25:26,950 INFO L175 Difference]: Start difference. First operand has 474 places, 510 transitions, 6548 flow. Second operand 8 states and 170 transitions. [2024-06-14 11:25:26,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 531 transitions, 7694 flow [2024-06-14 11:25:29,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 531 transitions, 7590 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 11:25:29,820 INFO L231 Difference]: Finished difference. Result has 478 places, 511 transitions, 6560 flow [2024-06-14 11:25:29,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6444, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6560, PETRI_PLACES=478, PETRI_TRANSITIONS=511} [2024-06-14 11:25:29,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-14 11:25:29,820 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 511 transitions, 6560 flow [2024-06-14 11:25:29,820 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) [2024-06-14 11:25:29,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:29,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:25:29,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-14 11:25:29,820 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:29,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:29,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1127202491, now seen corresponding path program 12 times [2024-06-14 11:25:29,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:29,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893425529] [2024-06-14 11:25:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:29,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:25:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:25:29,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:25:29,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893425529] [2024-06-14 11:25:29,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893425529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:25:29,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:25:29,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:25:29,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708184513] [2024-06-14 11:25:29,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:25:29,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:25:29,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:25:29,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:25:29,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:25:29,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:25:29,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 511 transitions, 6560 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) [2024-06-14 11:25:29,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:25:29,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:25:29,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:31,250 INFO L124 PetriNetUnfolderBase]: 3864/6470 cut-off events. [2024-06-14 11:25:31,250 INFO L125 PetriNetUnfolderBase]: For 559896/559908 co-relation queries the response was YES. [2024-06-14 11:25:31,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45068 conditions, 6470 events. 3864/6470 cut-off events. For 559896/559908 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 44967 event pairs, 980 based on Foata normal form. 20/6490 useless extension candidates. Maximal degree in co-relation 44865. Up to 5843 conditions per place. [2024-06-14 11:25:31,333 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 452 selfloop transitions, 72 changer transitions 0/530 dead transitions. [2024-06-14 11:25:31,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 530 transitions, 7692 flow [2024-06-14 11:25:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:25:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:25:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 11:25:31,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-14 11:25:31,334 INFO L175 Difference]: Start difference. First operand has 478 places, 511 transitions, 6560 flow. Second operand 8 states and 173 transitions. [2024-06-14 11:25:31,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 530 transitions, 7692 flow [2024-06-14 11:25:34,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 530 transitions, 7574 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 11:25:34,250 INFO L231 Difference]: Finished difference. Result has 480 places, 511 transitions, 6591 flow [2024-06-14 11:25:34,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6442, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6591, PETRI_PLACES=480, PETRI_TRANSITIONS=511} [2024-06-14 11:25:34,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-14 11:25:34,251 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 511 transitions, 6591 flow [2024-06-14 11:25:34,251 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) [2024-06-14 11:25:34,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:34,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:25:34,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-14 11:25:34,251 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:34,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:34,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1260734681, now seen corresponding path program 13 times [2024-06-14 11:25:34,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:34,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590493677] [2024-06-14 11:25:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:34,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:25:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:25:34,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:25:34,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590493677] [2024-06-14 11:25:34,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590493677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:25:34,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:25:34,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:25:34,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102469329] [2024-06-14 11:25:34,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:25:34,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:25:34,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:25:34,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:25:34,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:25:34,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:25:34,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 511 transitions, 6591 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) [2024-06-14 11:25:34,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:25:34,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:25:34,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:35,670 INFO L124 PetriNetUnfolderBase]: 3884/6504 cut-off events. [2024-06-14 11:25:35,670 INFO L125 PetriNetUnfolderBase]: For 553515/553527 co-relation queries the response was YES. [2024-06-14 11:25:35,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45305 conditions, 6504 events. 3884/6504 cut-off events. For 553515/553527 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 45342 event pairs, 952 based on Foata normal form. 18/6522 useless extension candidates. Maximal degree in co-relation 45101. Up to 5643 conditions per place. [2024-06-14 11:25:35,754 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 451 selfloop transitions, 80 changer transitions 0/537 dead transitions. [2024-06-14 11:25:35,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 537 transitions, 7827 flow [2024-06-14 11:25:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:25:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:25:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 11:25:35,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 11:25:35,755 INFO L175 Difference]: Start difference. First operand has 480 places, 511 transitions, 6591 flow. Second operand 8 states and 178 transitions. [2024-06-14 11:25:35,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 537 transitions, 7827 flow [2024-06-14 11:25:38,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 537 transitions, 7675 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 11:25:38,701 INFO L231 Difference]: Finished difference. Result has 481 places, 512 transitions, 6639 flow [2024-06-14 11:25:38,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6439, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6639, PETRI_PLACES=481, PETRI_TRANSITIONS=512} [2024-06-14 11:25:38,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-14 11:25:38,702 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 512 transitions, 6639 flow [2024-06-14 11:25:38,702 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) [2024-06-14 11:25:38,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:38,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:25:38,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-14 11:25:38,702 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:38,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:38,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1224323529, now seen corresponding path program 14 times [2024-06-14 11:25:38,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:38,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083287229] [2024-06-14 11:25:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:38,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:25:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:25:38,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:25:38,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083287229] [2024-06-14 11:25:38,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083287229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:25:38,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:25:38,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:25:38,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342734779] [2024-06-14 11:25:38,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:25:38,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:25:38,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:25:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:25:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:25:38,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:25:38,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 512 transitions, 6639 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) [2024-06-14 11:25:38,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:25:38,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:25:38,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:40,260 INFO L124 PetriNetUnfolderBase]: 3904/6538 cut-off events. [2024-06-14 11:25:40,260 INFO L125 PetriNetUnfolderBase]: For 562164/562176 co-relation queries the response was YES. [2024-06-14 11:25:40,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45798 conditions, 6538 events. 3904/6538 cut-off events. For 562164/562176 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 45534 event pairs, 978 based on Foata normal form. 18/6556 useless extension candidates. Maximal degree in co-relation 45593. Up to 5905 conditions per place. [2024-06-14 11:25:40,346 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 497 selfloop transitions, 39 changer transitions 0/542 dead transitions. [2024-06-14 11:25:40,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 542 transitions, 8123 flow [2024-06-14 11:25:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:25:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:25:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 11:25:40,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 11:25:40,347 INFO L175 Difference]: Start difference. First operand has 481 places, 512 transitions, 6639 flow. Second operand 8 states and 180 transitions. [2024-06-14 11:25:40,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 542 transitions, 8123 flow [2024-06-14 11:25:43,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 542 transitions, 7941 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 11:25:43,083 INFO L231 Difference]: Finished difference. Result has 483 places, 513 transitions, 6577 flow [2024-06-14 11:25:43,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6457, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6577, PETRI_PLACES=483, PETRI_TRANSITIONS=513} [2024-06-14 11:25:43,083 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-14 11:25:43,083 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 513 transitions, 6577 flow [2024-06-14 11:25:43,083 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) [2024-06-14 11:25:43,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:43,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:25:43,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-14 11:25:43,084 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:43,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:43,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1224471399, now seen corresponding path program 15 times [2024-06-14 11:25:43,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:43,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654894519] [2024-06-14 11:25:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:43,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:43,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:25:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:25:43,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:25:43,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654894519] [2024-06-14 11:25:43,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654894519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:25:43,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:25:43,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:25:43,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102186763] [2024-06-14 11:25:43,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:25:43,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:25:43,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:25:43,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:25:43,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:25:43,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:25:43,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 513 transitions, 6577 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) [2024-06-14 11:25:43,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:25:43,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:25:43,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:44,755 INFO L124 PetriNetUnfolderBase]: 3886/6512 cut-off events. [2024-06-14 11:25:44,755 INFO L125 PetriNetUnfolderBase]: For 524916/524928 co-relation queries the response was YES. [2024-06-14 11:25:44,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44388 conditions, 6512 events. 3886/6512 cut-off events. For 524916/524928 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 45403 event pairs, 976 based on Foata normal form. 20/6532 useless extension candidates. Maximal degree in co-relation 44182. Up to 5945 conditions per place. [2024-06-14 11:25:44,825 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 494 selfloop transitions, 34 changer transitions 0/534 dead transitions. [2024-06-14 11:25:44,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 534 transitions, 7723 flow [2024-06-14 11:25:44,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:25:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:25:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 11:25:44,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 11:25:44,826 INFO L175 Difference]: Start difference. First operand has 483 places, 513 transitions, 6577 flow. Second operand 7 states and 156 transitions. [2024-06-14 11:25:44,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 534 transitions, 7723 flow [2024-06-14 11:25:47,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 534 transitions, 7535 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 11:25:47,548 INFO L231 Difference]: Finished difference. Result has 483 places, 513 transitions, 6462 flow [2024-06-14 11:25:47,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6389, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6462, PETRI_PLACES=483, PETRI_TRANSITIONS=513} [2024-06-14 11:25:47,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-14 11:25:47,549 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 513 transitions, 6462 flow [2024-06-14 11:25:47,549 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) [2024-06-14 11:25:47,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:47,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:25:47,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-14 11:25:47,549 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:47,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:47,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1490020809, now seen corresponding path program 16 times [2024-06-14 11:25:47,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:47,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638108577] [2024-06-14 11:25:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:47,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:25:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:25:47,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:25:47,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638108577] [2024-06-14 11:25:47,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638108577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:25:47,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:25:47,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:25:47,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024540663] [2024-06-14 11:25:47,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:25:47,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:25:47,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:25:47,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:25:47,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:25:47,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:25:47,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 513 transitions, 6462 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) [2024-06-14 11:25:47,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:25:47,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:25:47,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:49,053 INFO L124 PetriNetUnfolderBase]: 3873/6493 cut-off events. [2024-06-14 11:25:49,053 INFO L125 PetriNetUnfolderBase]: For 465495/465507 co-relation queries the response was YES. [2024-06-14 11:25:49,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43062 conditions, 6493 events. 3873/6493 cut-off events. For 465495/465507 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 45249 event pairs, 867 based on Foata normal form. 18/6511 useless extension candidates. Maximal degree in co-relation 42856. Up to 5834 conditions per place. [2024-06-14 11:25:49,137 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 487 selfloop transitions, 45 changer transitions 0/538 dead transitions. [2024-06-14 11:25:49,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 538 transitions, 7608 flow [2024-06-14 11:25:49,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:25:49,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:25:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 11:25:49,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 11:25:49,138 INFO L175 Difference]: Start difference. First operand has 483 places, 513 transitions, 6462 flow. Second operand 7 states and 160 transitions. [2024-06-14 11:25:49,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 538 transitions, 7608 flow [2024-06-14 11:25:51,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 538 transitions, 7525 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 11:25:51,696 INFO L231 Difference]: Finished difference. Result has 485 places, 513 transitions, 6473 flow [2024-06-14 11:25:51,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6379, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6473, PETRI_PLACES=485, PETRI_TRANSITIONS=513} [2024-06-14 11:25:51,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-14 11:25:51,697 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 513 transitions, 6473 flow [2024-06-14 11:25:51,697 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) [2024-06-14 11:25:51,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:51,697 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, 1, 1] [2024-06-14 11:25:51,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-14 11:25:51,697 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:51,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:51,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1623968709, now seen corresponding path program 17 times [2024-06-14 11:25:51,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:51,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490706722] [2024-06-14 11:25:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:51,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:25:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:25:51,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:25:51,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490706722] [2024-06-14 11:25:51,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490706722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:25:51,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:25:51,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:25:51,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976907711] [2024-06-14 11:25:51,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:25:51,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:25:51,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:25:51,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:25:51,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:25:51,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:25:51,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 513 transitions, 6473 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) [2024-06-14 11:25:51,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:25:51,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:25:51,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:53,127 INFO L124 PetriNetUnfolderBase]: 3901/6537 cut-off events. [2024-06-14 11:25:53,127 INFO L125 PetriNetUnfolderBase]: For 489893/489905 co-relation queries the response was YES. [2024-06-14 11:25:53,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43520 conditions, 6537 events. 3901/6537 cut-off events. For 489893/489905 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 45656 event pairs, 991 based on Foata normal form. 20/6557 useless extension candidates. Maximal degree in co-relation 43313. Up to 5925 conditions per place. [2024-06-14 11:25:53,215 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 464 selfloop transitions, 62 changer transitions 0/532 dead transitions. [2024-06-14 11:25:53,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 532 transitions, 7643 flow [2024-06-14 11:25:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:25:53,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:25:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 11:25:53,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-14 11:25:53,216 INFO L175 Difference]: Start difference. First operand has 485 places, 513 transitions, 6473 flow. Second operand 7 states and 155 transitions. [2024-06-14 11:25:53,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 532 transitions, 7643 flow [2024-06-14 11:25:55,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 532 transitions, 7467 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 11:25:55,730 INFO L231 Difference]: Finished difference. Result has 484 places, 514 transitions, 6464 flow [2024-06-14 11:25:55,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6299, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6464, PETRI_PLACES=484, PETRI_TRANSITIONS=514} [2024-06-14 11:25:55,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-14 11:25:55,731 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 514 transitions, 6464 flow [2024-06-14 11:25:55,731 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) [2024-06-14 11:25:55,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:55,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:25:55,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-14 11:25:55,731 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:55,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:55,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1632539589, now seen corresponding path program 18 times [2024-06-14 11:25:55,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:55,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951749997] [2024-06-14 11:25:55,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:55,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:25:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:25:55,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:25:55,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951749997] [2024-06-14 11:25:55,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951749997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:25:55,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:25:55,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:25:55,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067920273] [2024-06-14 11:25:55,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:25:55,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:25:55,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:25:55,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:25:55,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:25:55,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:25:55,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 514 transitions, 6464 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) [2024-06-14 11:25:55,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:25:55,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:25:55,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:25:57,288 INFO L124 PetriNetUnfolderBase]: 3929/6581 cut-off events. [2024-06-14 11:25:57,288 INFO L125 PetriNetUnfolderBase]: For 498897/498909 co-relation queries the response was YES. [2024-06-14 11:25:57,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43764 conditions, 6581 events. 3929/6581 cut-off events. For 498897/498909 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 45959 event pairs, 979 based on Foata normal form. 20/6601 useless extension candidates. Maximal degree in co-relation 43557. Up to 5829 conditions per place. [2024-06-14 11:25:57,364 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 466 selfloop transitions, 65 changer transitions 0/537 dead transitions. [2024-06-14 11:25:57,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 537 transitions, 7692 flow [2024-06-14 11:25:57,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:25:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:25:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 11:25:57,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-14 11:25:57,365 INFO L175 Difference]: Start difference. First operand has 484 places, 514 transitions, 6464 flow. Second operand 7 states and 158 transitions. [2024-06-14 11:25:57,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 537 transitions, 7692 flow [2024-06-14 11:25:59,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 537 transitions, 7551 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:25:59,972 INFO L231 Difference]: Finished difference. Result has 486 places, 515 transitions, 6495 flow [2024-06-14 11:25:59,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6323, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6495, PETRI_PLACES=486, PETRI_TRANSITIONS=515} [2024-06-14 11:25:59,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-14 11:25:59,973 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 515 transitions, 6495 flow [2024-06-14 11:25:59,973 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) [2024-06-14 11:25:59,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:25:59,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:25:59,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-14 11:25:59,973 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:25:59,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:25:59,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2040619853, now seen corresponding path program 19 times [2024-06-14 11:25:59,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:25:59,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320150058] [2024-06-14 11:25:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:25:59,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:25:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:00,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:00,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320150058] [2024-06-14 11:26:00,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320150058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:00,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:00,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:26:00,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639824183] [2024-06-14 11:26:00,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:00,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:26:00,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:00,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:26:00,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:26:00,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:00,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 515 transitions, 6495 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) [2024-06-14 11:26:00,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:00,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:00,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:01,487 INFO L124 PetriNetUnfolderBase]: 3957/6625 cut-off events. [2024-06-14 11:26:01,487 INFO L125 PetriNetUnfolderBase]: For 507949/507961 co-relation queries the response was YES. [2024-06-14 11:26:01,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44213 conditions, 6625 events. 3957/6625 cut-off events. For 507949/507961 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 46373 event pairs, 993 based on Foata normal form. 20/6645 useless extension candidates. Maximal degree in co-relation 44005. Up to 6013 conditions per place. [2024-06-14 11:26:01,574 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 462 selfloop transitions, 69 changer transitions 0/537 dead transitions. [2024-06-14 11:26:01,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 537 transitions, 7683 flow [2024-06-14 11:26:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:26:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:26:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 11:26:01,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2024-06-14 11:26:01,575 INFO L175 Difference]: Start difference. First operand has 486 places, 515 transitions, 6495 flow. Second operand 10 states and 207 transitions. [2024-06-14 11:26:01,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 537 transitions, 7683 flow [2024-06-14 11:26:04,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 537 transitions, 7533 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 11:26:04,419 INFO L231 Difference]: Finished difference. Result has 491 places, 516 transitions, 6528 flow [2024-06-14 11:26:04,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6345, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6528, PETRI_PLACES=491, PETRI_TRANSITIONS=516} [2024-06-14 11:26:04,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-14 11:26:04,420 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 516 transitions, 6528 flow [2024-06-14 11:26:04,420 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) [2024-06-14 11:26:04,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:04,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:04,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-14 11:26:04,420 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:04,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1173705275, now seen corresponding path program 20 times [2024-06-14 11:26:04,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:04,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753996646] [2024-06-14 11:26:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:04,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:04,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753996646] [2024-06-14 11:26:04,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753996646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:04,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:04,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:26:04,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326220148] [2024-06-14 11:26:04,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:04,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:26:04,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:04,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:26:04,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:26:04,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:04,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 516 transitions, 6528 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) [2024-06-14 11:26:04,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:04,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:04,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:05,943 INFO L124 PetriNetUnfolderBase]: 3985/6669 cut-off events. [2024-06-14 11:26:05,943 INFO L125 PetriNetUnfolderBase]: For 515527/515539 co-relation queries the response was YES. [2024-06-14 11:26:06,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44564 conditions, 6669 events. 3985/6669 cut-off events. For 515527/515539 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 46743 event pairs, 1009 based on Foata normal form. 20/6689 useless extension candidates. Maximal degree in co-relation 44355. Up to 6057 conditions per place. [2024-06-14 11:26:06,037 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 465 selfloop transitions, 66 changer transitions 0/537 dead transitions. [2024-06-14 11:26:06,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 537 transitions, 7716 flow [2024-06-14 11:26:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:26:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:26:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 11:26:06,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-14 11:26:06,038 INFO L175 Difference]: Start difference. First operand has 491 places, 516 transitions, 6528 flow. Second operand 9 states and 190 transitions. [2024-06-14 11:26:06,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 537 transitions, 7716 flow [2024-06-14 11:26:08,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 537 transitions, 7557 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 11:26:08,628 INFO L231 Difference]: Finished difference. Result has 492 places, 517 transitions, 6548 flow [2024-06-14 11:26:08,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6548, PETRI_PLACES=492, PETRI_TRANSITIONS=517} [2024-06-14 11:26:08,628 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-14 11:26:08,628 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 517 transitions, 6548 flow [2024-06-14 11:26:08,628 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) [2024-06-14 11:26:08,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:08,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:08,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-14 11:26:08,629 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:08,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:08,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2034124733, now seen corresponding path program 21 times [2024-06-14 11:26:08,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:08,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327174503] [2024-06-14 11:26:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:08,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:08,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:08,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327174503] [2024-06-14 11:26:08,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327174503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:08,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:08,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:26:08,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681042030] [2024-06-14 11:26:08,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:08,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:26:08,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:08,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:26:08,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:26:08,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:08,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 517 transitions, 6548 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) [2024-06-14 11:26:08,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:08,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:08,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:10,196 INFO L124 PetriNetUnfolderBase]: 4000/6694 cut-off events. [2024-06-14 11:26:10,196 INFO L125 PetriNetUnfolderBase]: For 505807/505819 co-relation queries the response was YES. [2024-06-14 11:26:10,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44475 conditions, 6694 events. 4000/6694 cut-off events. For 505807/505819 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 46966 event pairs, 1006 based on Foata normal form. 20/6714 useless extension candidates. Maximal degree in co-relation 44265. Up to 5942 conditions per place. [2024-06-14 11:26:10,289 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 467 selfloop transitions, 69 changer transitions 0/542 dead transitions. [2024-06-14 11:26:10,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 542 transitions, 7796 flow [2024-06-14 11:26:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:26:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:26:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 11:26:10,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-14 11:26:10,290 INFO L175 Difference]: Start difference. First operand has 492 places, 517 transitions, 6548 flow. Second operand 9 states and 193 transitions. [2024-06-14 11:26:10,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 542 transitions, 7796 flow [2024-06-14 11:26:13,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 542 transitions, 7641 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 11:26:13,011 INFO L231 Difference]: Finished difference. Result has 494 places, 518 transitions, 6579 flow [2024-06-14 11:26:13,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6393, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6579, PETRI_PLACES=494, PETRI_TRANSITIONS=518} [2024-06-14 11:26:13,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-14 11:26:13,012 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 518 transitions, 6579 flow [2024-06-14 11:26:13,012 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) [2024-06-14 11:26:13,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:13,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:13,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-14 11:26:13,012 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:13,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:13,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1490436519, now seen corresponding path program 22 times [2024-06-14 11:26:13,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:13,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203877709] [2024-06-14 11:26:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:13,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:13,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:13,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203877709] [2024-06-14 11:26:13,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203877709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:13,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:13,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:26:13,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989148410] [2024-06-14 11:26:13,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:13,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:26:13,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:13,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:26:13,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:26:13,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:13,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 518 transitions, 6579 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) [2024-06-14 11:26:13,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:13,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:13,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:14,685 INFO L124 PetriNetUnfolderBase]: 3987/6675 cut-off events. [2024-06-14 11:26:14,686 INFO L125 PetriNetUnfolderBase]: For 443755/443767 co-relation queries the response was YES. [2024-06-14 11:26:14,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43446 conditions, 6675 events. 3987/6675 cut-off events. For 443755/443767 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 46804 event pairs, 912 based on Foata normal form. 18/6693 useless extension candidates. Maximal degree in co-relation 43235. Up to 5520 conditions per place. [2024-06-14 11:26:14,758 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 455 selfloop transitions, 84 changer transitions 0/545 dead transitions. [2024-06-14 11:26:14,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 545 transitions, 7803 flow [2024-06-14 11:26:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:26:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:26:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 11:26:14,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 11:26:14,758 INFO L175 Difference]: Start difference. First operand has 494 places, 518 transitions, 6579 flow. Second operand 7 states and 163 transitions. [2024-06-14 11:26:14,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 545 transitions, 7803 flow [2024-06-14 11:26:17,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 545 transitions, 7629 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 11:26:17,189 INFO L231 Difference]: Finished difference. Result has 494 places, 518 transitions, 6577 flow [2024-06-14 11:26:17,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6405, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6577, PETRI_PLACES=494, PETRI_TRANSITIONS=518} [2024-06-14 11:26:17,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-14 11:26:17,189 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 518 transitions, 6577 flow [2024-06-14 11:26:17,189 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) [2024-06-14 11:26:17,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:17,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:17,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-14 11:26:17,190 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:17,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:17,190 INFO L85 PathProgramCache]: Analyzing trace with hash -2040404837, now seen corresponding path program 4 times [2024-06-14 11:26:17,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:17,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625039200] [2024-06-14 11:26:17,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:17,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:17,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:17,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625039200] [2024-06-14 11:26:17,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625039200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:17,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:17,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:26:17,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143920915] [2024-06-14 11:26:17,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:17,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:26:17,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:17,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:26:17,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:26:17,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:17,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 518 transitions, 6577 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) [2024-06-14 11:26:17,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:17,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:17,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:18,728 INFO L124 PetriNetUnfolderBase]: 4015/6721 cut-off events. [2024-06-14 11:26:18,728 INFO L125 PetriNetUnfolderBase]: For 448155/448167 co-relation queries the response was YES. [2024-06-14 11:26:18,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43747 conditions, 6721 events. 4015/6721 cut-off events. For 448155/448167 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 47178 event pairs, 995 based on Foata normal form. 18/6739 useless extension candidates. Maximal degree in co-relation 43535. Up to 6015 conditions per place. [2024-06-14 11:26:18,817 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 466 selfloop transitions, 76 changer transitions 0/548 dead transitions. [2024-06-14 11:26:18,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 548 transitions, 7835 flow [2024-06-14 11:26:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:26:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:26:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 11:26:18,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 11:26:18,818 INFO L175 Difference]: Start difference. First operand has 494 places, 518 transitions, 6577 flow. Second operand 10 states and 215 transitions. [2024-06-14 11:26:18,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 548 transitions, 7835 flow [2024-06-14 11:26:21,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 548 transitions, 7441 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 11:26:21,555 INFO L231 Difference]: Finished difference. Result has 496 places, 521 transitions, 6405 flow [2024-06-14 11:26:21,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6183, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6405, PETRI_PLACES=496, PETRI_TRANSITIONS=521} [2024-06-14 11:26:21,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-14 11:26:21,555 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 521 transitions, 6405 flow [2024-06-14 11:26:21,555 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) [2024-06-14 11:26:21,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:21,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:21,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-14 11:26:21,556 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:21,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:21,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1612307981, now seen corresponding path program 2 times [2024-06-14 11:26:21,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:21,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161210632] [2024-06-14 11:26:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:21,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:21,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:21,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161210632] [2024-06-14 11:26:21,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161210632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:21,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:21,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:26:21,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702331819] [2024-06-14 11:26:21,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:21,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:26:21,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:21,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:26:21,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:26:21,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:21,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 521 transitions, 6405 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) [2024-06-14 11:26:21,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:21,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:21,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:23,096 INFO L124 PetriNetUnfolderBase]: 4035/6751 cut-off events. [2024-06-14 11:26:23,096 INFO L125 PetriNetUnfolderBase]: For 451771/451783 co-relation queries the response was YES. [2024-06-14 11:26:23,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43075 conditions, 6751 events. 4035/6751 cut-off events. For 451771/451783 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 47352 event pairs, 1027 based on Foata normal form. 18/6769 useless extension candidates. Maximal degree in co-relation 42864. Up to 6027 conditions per place. [2024-06-14 11:26:23,185 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 463 selfloop transitions, 77 changer transitions 0/546 dead transitions. [2024-06-14 11:26:23,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 546 transitions, 7623 flow [2024-06-14 11:26:23,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:26:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:26:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 11:26:23,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:26:23,188 INFO L175 Difference]: Start difference. First operand has 496 places, 521 transitions, 6405 flow. Second operand 10 states and 210 transitions. [2024-06-14 11:26:23,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 546 transitions, 7623 flow [2024-06-14 11:26:25,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 546 transitions, 7455 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 11:26:25,831 INFO L231 Difference]: Finished difference. Result has 498 places, 522 transitions, 6424 flow [2024-06-14 11:26:25,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6237, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6424, PETRI_PLACES=498, PETRI_TRANSITIONS=522} [2024-06-14 11:26:25,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-14 11:26:25,832 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 522 transitions, 6424 flow [2024-06-14 11:26:25,832 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) [2024-06-14 11:26:25,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:25,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:25,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-14 11:26:25,832 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:25,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1597569341, now seen corresponding path program 3 times [2024-06-14 11:26:25,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:25,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395069616] [2024-06-14 11:26:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:25,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:25,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395069616] [2024-06-14 11:26:25,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395069616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:25,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:25,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:26:25,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856804457] [2024-06-14 11:26:25,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:25,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:26:25,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:26:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:26:26,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:26,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 522 transitions, 6424 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) [2024-06-14 11:26:26,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:26,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:26,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:27,413 INFO L124 PetriNetUnfolderBase]: 4055/6791 cut-off events. [2024-06-14 11:26:27,413 INFO L125 PetriNetUnfolderBase]: For 451867/451879 co-relation queries the response was YES. [2024-06-14 11:26:27,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43225 conditions, 6791 events. 4055/6791 cut-off events. For 451867/451879 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 47746 event pairs, 951 based on Foata normal form. 18/6809 useless extension candidates. Maximal degree in co-relation 43014. Up to 5622 conditions per place. [2024-06-14 11:26:27,498 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 452 selfloop transitions, 92 changer transitions 0/550 dead transitions. [2024-06-14 11:26:27,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 550 transitions, 7940 flow [2024-06-14 11:26:27,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:26:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:26:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 11:26:27,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-14 11:26:27,499 INFO L175 Difference]: Start difference. First operand has 498 places, 522 transitions, 6424 flow. Second operand 9 states and 196 transitions. [2024-06-14 11:26:27,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 550 transitions, 7940 flow [2024-06-14 11:26:29,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 550 transitions, 7771 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 11:26:29,940 INFO L231 Difference]: Finished difference. Result has 499 places, 523 transitions, 6471 flow [2024-06-14 11:26:29,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6255, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6471, PETRI_PLACES=499, PETRI_TRANSITIONS=523} [2024-06-14 11:26:29,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-14 11:26:29,940 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 523 transitions, 6471 flow [2024-06-14 11:26:29,940 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) [2024-06-14 11:26:29,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:29,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:29,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-14 11:26:29,941 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:29,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1597575851, now seen corresponding path program 4 times [2024-06-14 11:26:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:29,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351477621] [2024-06-14 11:26:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:29,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:30,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:30,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351477621] [2024-06-14 11:26:30,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351477621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:30,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:30,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:26:30,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407942250] [2024-06-14 11:26:30,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:30,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:26:30,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:30,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:26:30,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:26:30,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:30,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 523 transitions, 6471 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) [2024-06-14 11:26:30,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:30,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:30,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:31,612 INFO L124 PetriNetUnfolderBase]: 4042/6772 cut-off events. [2024-06-14 11:26:31,613 INFO L125 PetriNetUnfolderBase]: For 404815/404827 co-relation queries the response was YES. [2024-06-14 11:26:31,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42404 conditions, 6772 events. 4042/6772 cut-off events. For 404815/404827 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 47674 event pairs, 929 based on Foata normal form. 18/6790 useless extension candidates. Maximal degree in co-relation 42192. Up to 5616 conditions per place. [2024-06-14 11:26:31,687 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 453 selfloop transitions, 91 changer transitions 0/550 dead transitions. [2024-06-14 11:26:31,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 550 transitions, 7717 flow [2024-06-14 11:26:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:26:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:26:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 11:26:31,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-14 11:26:31,687 INFO L175 Difference]: Start difference. First operand has 499 places, 523 transitions, 6471 flow. Second operand 9 states and 197 transitions. [2024-06-14 11:26:31,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 550 transitions, 7717 flow [2024-06-14 11:26:33,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 550 transitions, 7449 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 11:26:33,880 INFO L231 Difference]: Finished difference. Result has 501 places, 523 transitions, 6389 flow [2024-06-14 11:26:33,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6389, PETRI_PLACES=501, PETRI_TRANSITIONS=523} [2024-06-14 11:26:33,880 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 459 predicate places. [2024-06-14 11:26:33,881 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 523 transitions, 6389 flow [2024-06-14 11:26:33,881 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) [2024-06-14 11:26:33,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:33,881 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, 1, 1] [2024-06-14 11:26:33,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-14 11:26:33,881 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:33,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:33,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1597576037, now seen corresponding path program 5 times [2024-06-14 11:26:33,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:33,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803333782] [2024-06-14 11:26:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:33,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:34,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:34,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803333782] [2024-06-14 11:26:34,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803333782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:34,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:34,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:26:34,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150624950] [2024-06-14 11:26:34,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:34,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:26:34,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:34,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:26:34,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:26:34,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:34,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 523 transitions, 6389 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) [2024-06-14 11:26:34,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:34,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:34,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:35,430 INFO L124 PetriNetUnfolderBase]: 4070/6816 cut-off events. [2024-06-14 11:26:35,430 INFO L125 PetriNetUnfolderBase]: For 409691/409703 co-relation queries the response was YES. [2024-06-14 11:26:35,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42225 conditions, 6816 events. 4070/6816 cut-off events. For 409691/409703 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 48030 event pairs, 897 based on Foata normal form. 18/6834 useless extension candidates. Maximal degree in co-relation 42013. Up to 5776 conditions per place. [2024-06-14 11:26:35,521 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 456 selfloop transitions, 91 changer transitions 0/553 dead transitions. [2024-06-14 11:26:35,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 553 transitions, 7665 flow [2024-06-14 11:26:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:26:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:26:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 11:26:35,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:26:35,522 INFO L175 Difference]: Start difference. First operand has 501 places, 523 transitions, 6389 flow. Second operand 9 states and 198 transitions. [2024-06-14 11:26:35,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 553 transitions, 7665 flow [2024-06-14 11:26:38,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 553 transitions, 7464 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 11:26:38,136 INFO L231 Difference]: Finished difference. Result has 503 places, 526 transitions, 6442 flow [2024-06-14 11:26:38,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6192, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6442, PETRI_PLACES=503, PETRI_TRANSITIONS=526} [2024-06-14 11:26:38,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-14 11:26:38,137 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 526 transitions, 6442 flow [2024-06-14 11:26:38,137 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) [2024-06-14 11:26:38,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:38,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:38,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-14 11:26:38,138 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:38,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:38,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1637987557, now seen corresponding path program 6 times [2024-06-14 11:26:38,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:38,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227416478] [2024-06-14 11:26:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:38,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:38,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:38,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227416478] [2024-06-14 11:26:38,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227416478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:38,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:38,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:26:38,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565682481] [2024-06-14 11:26:38,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:38,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:26:38,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:38,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:26:38,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:26:38,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:38,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 526 transitions, 6442 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) [2024-06-14 11:26:38,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:38,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:38,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:39,654 INFO L124 PetriNetUnfolderBase]: 4123/6903 cut-off events. [2024-06-14 11:26:39,655 INFO L125 PetriNetUnfolderBase]: For 468058/468062 co-relation queries the response was YES. [2024-06-14 11:26:39,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43875 conditions, 6903 events. 4123/6903 cut-off events. For 468058/468062 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 48733 event pairs, 1056 based on Foata normal form. 10/6912 useless extension candidates. Maximal degree in co-relation 43661. Up to 5995 conditions per place. [2024-06-14 11:26:39,746 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 448 selfloop transitions, 97 changer transitions 0/551 dead transitions. [2024-06-14 11:26:39,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 551 transitions, 8018 flow [2024-06-14 11:26:39,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:26:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:26:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 11:26:39,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:26:39,747 INFO L175 Difference]: Start difference. First operand has 503 places, 526 transitions, 6442 flow. Second operand 8 states and 176 transitions. [2024-06-14 11:26:39,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 551 transitions, 8018 flow [2024-06-14 11:26:42,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 551 transitions, 7810 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 11:26:42,313 INFO L231 Difference]: Finished difference. Result has 504 places, 528 transitions, 6516 flow [2024-06-14 11:26:42,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6236, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6516, PETRI_PLACES=504, PETRI_TRANSITIONS=528} [2024-06-14 11:26:42,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-14 11:26:42,314 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 528 transitions, 6516 flow [2024-06-14 11:26:42,314 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) [2024-06-14 11:26:42,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:42,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:42,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-14 11:26:42,314 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:42,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:42,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1637867587, now seen corresponding path program 7 times [2024-06-14 11:26:42,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:42,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495890982] [2024-06-14 11:26:42,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:42,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:42,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:42,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495890982] [2024-06-14 11:26:42,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495890982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:42,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:42,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:26:42,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74143252] [2024-06-14 11:26:42,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:42,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:26:42,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:42,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:26:42,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:26:42,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:42,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 528 transitions, 6516 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) [2024-06-14 11:26:42,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:42,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:42,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:43,980 INFO L124 PetriNetUnfolderBase]: 4110/6882 cut-off events. [2024-06-14 11:26:43,981 INFO L125 PetriNetUnfolderBase]: For 412476/412488 co-relation queries the response was YES. [2024-06-14 11:26:44,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42657 conditions, 6882 events. 4110/6882 cut-off events. For 412476/412488 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 48543 event pairs, 1050 based on Foata normal form. 18/6900 useless extension candidates. Maximal degree in co-relation 42443. Up to 6308 conditions per place. [2024-06-14 11:26:44,065 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 504 selfloop transitions, 35 changer transitions 0/545 dead transitions. [2024-06-14 11:26:44,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 545 transitions, 7654 flow [2024-06-14 11:26:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:26:44,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:26:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 11:26:44,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-14 11:26:44,066 INFO L175 Difference]: Start difference. First operand has 504 places, 528 transitions, 6516 flow. Second operand 8 states and 167 transitions. [2024-06-14 11:26:44,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 545 transitions, 7654 flow [2024-06-14 11:26:46,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 545 transitions, 7482 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 11:26:46,378 INFO L231 Difference]: Finished difference. Result has 508 places, 528 transitions, 6418 flow [2024-06-14 11:26:46,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6344, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6418, PETRI_PLACES=508, PETRI_TRANSITIONS=528} [2024-06-14 11:26:46,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-14 11:26:46,379 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 528 transitions, 6418 flow [2024-06-14 11:26:46,379 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) [2024-06-14 11:26:46,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:46,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:46,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-14 11:26:46,379 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:46,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:46,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1276511461, now seen corresponding path program 8 times [2024-06-14 11:26:46,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:46,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463705523] [2024-06-14 11:26:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:46,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:46,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:46,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463705523] [2024-06-14 11:26:46,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463705523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:46,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:46,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:26:46,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249778816] [2024-06-14 11:26:46,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:46,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:26:46,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:46,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:26:46,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:26:46,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:46,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 528 transitions, 6418 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) [2024-06-14 11:26:46,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:46,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:46,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:47,993 INFO L124 PetriNetUnfolderBase]: 4171/6987 cut-off events. [2024-06-14 11:26:47,993 INFO L125 PetriNetUnfolderBase]: For 472972/472984 co-relation queries the response was YES. [2024-06-14 11:26:48,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44158 conditions, 6987 events. 4171/6987 cut-off events. For 472972/472984 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 49410 event pairs, 969 based on Foata normal form. 18/7005 useless extension candidates. Maximal degree in co-relation 43942. Up to 6246 conditions per place. [2024-06-14 11:26:48,087 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 496 selfloop transitions, 53 changer transitions 0/555 dead transitions. [2024-06-14 11:26:48,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 555 transitions, 7978 flow [2024-06-14 11:26:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:26:48,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:26:48,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-14 11:26:48,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-14 11:26:48,088 INFO L175 Difference]: Start difference. First operand has 508 places, 528 transitions, 6418 flow. Second operand 9 states and 187 transitions. [2024-06-14 11:26:48,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 555 transitions, 7978 flow [2024-06-14 11:26:51,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 555 transitions, 7872 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:26:51,190 INFO L231 Difference]: Finished difference. Result has 509 places, 532 transitions, 6522 flow [2024-06-14 11:26:51,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6312, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6522, PETRI_PLACES=509, PETRI_TRANSITIONS=532} [2024-06-14 11:26:51,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-14 11:26:51,191 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 532 transitions, 6522 flow [2024-06-14 11:26:51,191 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) [2024-06-14 11:26:51,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:51,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:51,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-14 11:26:51,191 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:51,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:51,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1281153091, now seen corresponding path program 9 times [2024-06-14 11:26:51,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:51,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255119298] [2024-06-14 11:26:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:51,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:51,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:51,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255119298] [2024-06-14 11:26:51,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255119298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:51,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:51,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:26:51,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15982930] [2024-06-14 11:26:51,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:51,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:26:51,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:51,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:26:51,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:26:51,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:51,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 532 transitions, 6522 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) [2024-06-14 11:26:51,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:51,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:51,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:52,782 INFO L124 PetriNetUnfolderBase]: 4158/6968 cut-off events. [2024-06-14 11:26:52,782 INFO L125 PetriNetUnfolderBase]: For 424109/424121 co-relation queries the response was YES. [2024-06-14 11:26:52,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43242 conditions, 6968 events. 4158/6968 cut-off events. For 424109/424121 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 49320 event pairs, 967 based on Foata normal form. 18/6986 useless extension candidates. Maximal degree in co-relation 43026. Up to 6312 conditions per place. [2024-06-14 11:26:52,875 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 494 selfloop transitions, 50 changer transitions 0/550 dead transitions. [2024-06-14 11:26:52,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 550 transitions, 7672 flow [2024-06-14 11:26:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:26:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:26:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 11:26:52,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:26:52,876 INFO L175 Difference]: Start difference. First operand has 509 places, 532 transitions, 6522 flow. Second operand 8 states and 168 transitions. [2024-06-14 11:26:52,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 550 transitions, 7672 flow [2024-06-14 11:26:55,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 550 transitions, 7544 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 11:26:55,432 INFO L231 Difference]: Finished difference. Result has 512 places, 532 transitions, 6498 flow [2024-06-14 11:26:55,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6394, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6498, PETRI_PLACES=512, PETRI_TRANSITIONS=532} [2024-06-14 11:26:55,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 470 predicate places. [2024-06-14 11:26:55,433 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 532 transitions, 6498 flow [2024-06-14 11:26:55,433 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) [2024-06-14 11:26:55,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:55,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:55,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-14 11:26:55,433 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:55,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:55,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1281273061, now seen corresponding path program 10 times [2024-06-14 11:26:55,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:55,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212145594] [2024-06-14 11:26:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:55,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:55,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:55,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212145594] [2024-06-14 11:26:55,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212145594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:55,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:55,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:26:55,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161286044] [2024-06-14 11:26:55,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:55,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:26:55,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:55,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:26:55,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:26:55,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:55,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 532 transitions, 6498 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) [2024-06-14 11:26:55,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:55,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:55,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:26:56,931 INFO L124 PetriNetUnfolderBase]: 4145/6947 cut-off events. [2024-06-14 11:26:56,931 INFO L125 PetriNetUnfolderBase]: For 364567/364571 co-relation queries the response was YES. [2024-06-14 11:26:57,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41991 conditions, 6947 events. 4145/6947 cut-off events. For 364567/364571 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 49061 event pairs, 1025 based on Foata normal form. 10/6956 useless extension candidates. Maximal degree in co-relation 41775. Up to 5226 conditions per place. [2024-06-14 11:26:57,024 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 424 selfloop transitions, 125 changer transitions 0/555 dead transitions. [2024-06-14 11:26:57,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 555 transitions, 7734 flow [2024-06-14 11:26:57,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:26:57,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:26:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 11:26:57,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-14 11:26:57,024 INFO L175 Difference]: Start difference. First operand has 512 places, 532 transitions, 6498 flow. Second operand 8 states and 175 transitions. [2024-06-14 11:26:57,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 555 transitions, 7734 flow [2024-06-14 11:26:59,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 555 transitions, 7608 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:26:59,025 INFO L231 Difference]: Finished difference. Result has 512 places, 532 transitions, 6626 flow [2024-06-14 11:26:59,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6372, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6626, PETRI_PLACES=512, PETRI_TRANSITIONS=532} [2024-06-14 11:26:59,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 470 predicate places. [2024-06-14 11:26:59,025 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 532 transitions, 6626 flow [2024-06-14 11:26:59,025 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) [2024-06-14 11:26:59,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:26:59,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:26:59,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-14 11:26:59,026 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:26:59,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:26:59,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1944359919, now seen corresponding path program 1 times [2024-06-14 11:26:59,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:26:59,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344870633] [2024-06-14 11:26:59,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:26:59,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:26:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:26:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:26:59,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:26:59,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344870633] [2024-06-14 11:26:59,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344870633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:26:59,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:26:59,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:26:59,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430923590] [2024-06-14 11:26:59,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:26:59,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:26:59,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:26:59,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:26:59,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:26:59,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:26:59,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 532 transitions, 6626 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:26:59,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:26:59,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:26:59,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:00,893 INFO L124 PetriNetUnfolderBase]: 4434/7467 cut-off events. [2024-06-14 11:27:00,894 INFO L125 PetriNetUnfolderBase]: For 943774/943782 co-relation queries the response was YES. [2024-06-14 11:27:00,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51870 conditions, 7467 events. 4434/7467 cut-off events. For 943774/943782 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 53228 event pairs, 1057 based on Foata normal form. 26/7492 useless extension candidates. Maximal degree in co-relation 51653. Up to 2793 conditions per place. [2024-06-14 11:27:00,986 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 332 selfloop transitions, 234 changer transitions 16/588 dead transitions. [2024-06-14 11:27:00,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 588 transitions, 8690 flow [2024-06-14 11:27:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:27:00,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:27:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-14 11:27:00,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5720620842572062 [2024-06-14 11:27:00,986 INFO L175 Difference]: Start difference. First operand has 512 places, 532 transitions, 6626 flow. Second operand 11 states and 258 transitions. [2024-06-14 11:27:00,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 588 transitions, 8690 flow [2024-06-14 11:27:05,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 588 transitions, 8232 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-14 11:27:05,618 INFO L231 Difference]: Finished difference. Result has 514 places, 529 transitions, 6610 flow [2024-06-14 11:27:05,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6168, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6610, PETRI_PLACES=514, PETRI_TRANSITIONS=529} [2024-06-14 11:27:05,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-14 11:27:05,618 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 529 transitions, 6610 flow [2024-06-14 11:27:05,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:05,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:05,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:05,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-14 11:27:05,619 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:27:05,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:05,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1939201459, now seen corresponding path program 2 times [2024-06-14 11:27:05,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:05,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805796168] [2024-06-14 11:27:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:05,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:05,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:05,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:05,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805796168] [2024-06-14 11:27:05,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805796168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:05,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:05,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:27:05,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929639903] [2024-06-14 11:27:05,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:05,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:27:05,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:05,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:27:05,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:27:05,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:05,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 529 transitions, 6610 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:05,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:05,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:05,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:07,549 INFO L124 PetriNetUnfolderBase]: 4444/7486 cut-off events. [2024-06-14 11:27:07,549 INFO L125 PetriNetUnfolderBase]: For 1123600/1123612 co-relation queries the response was YES. [2024-06-14 11:27:07,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53598 conditions, 7486 events. 4444/7486 cut-off events. For 1123600/1123612 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 53541 event pairs, 926 based on Foata normal form. 30/7516 useless extension candidates. Maximal degree in co-relation 53383. Up to 5422 conditions per place. [2024-06-14 11:27:07,641 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 435 selfloop transitions, 129 changer transitions 8/578 dead transitions. [2024-06-14 11:27:07,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 578 transitions, 8330 flow [2024-06-14 11:27:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:27:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:27:07,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-14 11:27:07,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476718403547672 [2024-06-14 11:27:07,643 INFO L175 Difference]: Start difference. First operand has 514 places, 529 transitions, 6610 flow. Second operand 11 states and 247 transitions. [2024-06-14 11:27:07,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 578 transitions, 8330 flow [2024-06-14 11:27:13,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 578 transitions, 7868 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 11:27:13,372 INFO L231 Difference]: Finished difference. Result has 512 places, 527 transitions, 6397 flow [2024-06-14 11:27:13,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6152, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6397, PETRI_PLACES=512, PETRI_TRANSITIONS=527} [2024-06-14 11:27:13,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 470 predicate places. [2024-06-14 11:27:13,373 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 527 transitions, 6397 flow [2024-06-14 11:27:13,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:13,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:13,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:13,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-14 11:27:13,373 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:27:13,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:13,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1939195879, now seen corresponding path program 3 times [2024-06-14 11:27:13,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:13,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632242861] [2024-06-14 11:27:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:13,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:13,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:13,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632242861] [2024-06-14 11:27:13,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632242861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:13,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:13,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:27:13,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110480909] [2024-06-14 11:27:13,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:13,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:27:13,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:13,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:27:13,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:27:13,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:13,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 527 transitions, 6397 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:13,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:13,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:13,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:15,160 INFO L124 PetriNetUnfolderBase]: 4212/7078 cut-off events. [2024-06-14 11:27:15,160 INFO L125 PetriNetUnfolderBase]: For 701896/701908 co-relation queries the response was YES. [2024-06-14 11:27:15,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45640 conditions, 7078 events. 4212/7078 cut-off events. For 701896/701908 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 50110 event pairs, 825 based on Foata normal form. 30/7108 useless extension candidates. Maximal degree in co-relation 45426. Up to 5217 conditions per place. [2024-06-14 11:27:15,242 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 420 selfloop transitions, 126 changer transitions 19/571 dead transitions. [2024-06-14 11:27:15,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 571 transitions, 7777 flow [2024-06-14 11:27:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:27:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:27:15,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-14 11:27:15,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-14 11:27:15,243 INFO L175 Difference]: Start difference. First operand has 512 places, 527 transitions, 6397 flow. Second operand 11 states and 241 transitions. [2024-06-14 11:27:15,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 571 transitions, 7777 flow [2024-06-14 11:27:18,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 571 transitions, 7516 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:27:18,202 INFO L231 Difference]: Finished difference. Result has 511 places, 523 transitions, 6341 flow [2024-06-14 11:27:18,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6136, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6341, PETRI_PLACES=511, PETRI_TRANSITIONS=523} [2024-06-14 11:27:18,203 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-14 11:27:18,203 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 523 transitions, 6341 flow [2024-06-14 11:27:18,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:18,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:18,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:18,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-14 11:27:18,203 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:27:18,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:18,203 INFO L85 PathProgramCache]: Analyzing trace with hash 942512007, now seen corresponding path program 4 times [2024-06-14 11:27:18,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:18,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301638423] [2024-06-14 11:27:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:18,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:18,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:18,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301638423] [2024-06-14 11:27:18,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301638423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:18,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:18,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:27:18,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452535382] [2024-06-14 11:27:18,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:18,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:27:18,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:18,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:27:18,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:27:18,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:18,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 523 transitions, 6341 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:18,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:18,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:18,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:19,992 INFO L124 PetriNetUnfolderBase]: 4333/7299 cut-off events. [2024-06-14 11:27:19,992 INFO L125 PetriNetUnfolderBase]: For 1020141/1020153 co-relation queries the response was YES. [2024-06-14 11:27:20,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51371 conditions, 7299 events. 4333/7299 cut-off events. For 1020141/1020153 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 51969 event pairs, 933 based on Foata normal form. 30/7329 useless extension candidates. Maximal degree in co-relation 51158. Up to 5061 conditions per place. [2024-06-14 11:27:20,289 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 430 selfloop transitions, 125 changer transitions 13/574 dead transitions. [2024-06-14 11:27:20,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 574 transitions, 8047 flow [2024-06-14 11:27:20,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:27:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:27:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 276 transitions. [2024-06-14 11:27:20,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178236397748592 [2024-06-14 11:27:20,290 INFO L175 Difference]: Start difference. First operand has 511 places, 523 transitions, 6341 flow. Second operand 13 states and 276 transitions. [2024-06-14 11:27:20,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 574 transitions, 8047 flow [2024-06-14 11:27:24,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 574 transitions, 7768 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 11:27:24,372 INFO L231 Difference]: Finished difference. Result has 507 places, 520 transitions, 6276 flow [2024-06-14 11:27:24,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6064, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6276, PETRI_PLACES=507, PETRI_TRANSITIONS=520} [2024-06-14 11:27:24,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-14 11:27:24,372 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 520 transitions, 6276 flow [2024-06-14 11:27:24,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:24,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:24,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:24,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-14 11:27:24,372 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:27:24,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:24,373 INFO L85 PathProgramCache]: Analyzing trace with hash -743091635, now seen corresponding path program 5 times [2024-06-14 11:27:24,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:24,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768793637] [2024-06-14 11:27:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:24,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:24,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:24,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768793637] [2024-06-14 11:27:24,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768793637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:24,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:24,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:27:24,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579699112] [2024-06-14 11:27:24,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:24,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:27:24,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:24,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:27:24,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:27:24,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:24,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 520 transitions, 6276 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:24,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:24,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:24,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:26,088 INFO L124 PetriNetUnfolderBase]: 4289/7227 cut-off events. [2024-06-14 11:27:26,088 INFO L125 PetriNetUnfolderBase]: For 1017787/1017799 co-relation queries the response was YES. [2024-06-14 11:27:26,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50838 conditions, 7227 events. 4289/7227 cut-off events. For 1017787/1017799 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 51407 event pairs, 933 based on Foata normal form. 30/7257 useless extension candidates. Maximal degree in co-relation 50626. Up to 5061 conditions per place. [2024-06-14 11:27:26,188 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 439 selfloop transitions, 119 changer transitions 8/572 dead transitions. [2024-06-14 11:27:26,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 572 transitions, 8274 flow [2024-06-14 11:27:26,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:27:26,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:27:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-14 11:27:26,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:27:26,189 INFO L175 Difference]: Start difference. First operand has 507 places, 520 transitions, 6276 flow. Second operand 12 states and 264 transitions. [2024-06-14 11:27:26,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 572 transitions, 8274 flow [2024-06-14 11:27:31,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 572 transitions, 8024 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 11:27:31,305 INFO L231 Difference]: Finished difference. Result has 505 places, 518 transitions, 6254 flow [2024-06-14 11:27:31,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6030, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6254, PETRI_PLACES=505, PETRI_TRANSITIONS=518} [2024-06-14 11:27:31,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-14 11:27:31,305 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 518 transitions, 6254 flow [2024-06-14 11:27:31,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:31,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:31,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:31,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-14 11:27:31,306 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:27:31,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:31,306 INFO L85 PathProgramCache]: Analyzing trace with hash -743086055, now seen corresponding path program 6 times [2024-06-14 11:27:31,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:31,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742090408] [2024-06-14 11:27:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:31,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:31,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:31,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742090408] [2024-06-14 11:27:31,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742090408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:31,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:31,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:27:31,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587340756] [2024-06-14 11:27:31,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:31,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:27:31,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:27:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:27:31,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:31,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 518 transitions, 6254 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:31,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:31,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:31,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:32,981 INFO L124 PetriNetUnfolderBase]: 4184/7044 cut-off events. [2024-06-14 11:27:32,981 INFO L125 PetriNetUnfolderBase]: For 857251/857263 co-relation queries the response was YES. [2024-06-14 11:27:33,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47604 conditions, 7044 events. 4184/7044 cut-off events. For 857251/857263 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49841 event pairs, 965 based on Foata normal form. 30/7074 useless extension candidates. Maximal degree in co-relation 47392. Up to 5061 conditions per place. [2024-06-14 11:27:33,074 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 424 selfloop transitions, 115 changer transitions 20/565 dead transitions. [2024-06-14 11:27:33,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 565 transitions, 7916 flow [2024-06-14 11:27:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:27:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:27:33,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-14 11:27:33,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 11:27:33,075 INFO L175 Difference]: Start difference. First operand has 505 places, 518 transitions, 6254 flow. Second operand 12 states and 258 transitions. [2024-06-14 11:27:33,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 565 transitions, 7916 flow [2024-06-14 11:27:36,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 565 transitions, 7675 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 11:27:36,795 INFO L231 Difference]: Finished difference. Result has 505 places, 513 transitions, 6171 flow [2024-06-14 11:27:36,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6017, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6171, PETRI_PLACES=505, PETRI_TRANSITIONS=513} [2024-06-14 11:27:36,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-14 11:27:36,795 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 513 transitions, 6171 flow [2024-06-14 11:27:36,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:36,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:36,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:36,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-14 11:27:36,795 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:27:36,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:36,796 INFO L85 PathProgramCache]: Analyzing trace with hash -480056239, now seen corresponding path program 7 times [2024-06-14 11:27:36,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:36,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323701665] [2024-06-14 11:27:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:36,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:36,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:36,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323701665] [2024-06-14 11:27:36,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323701665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:36,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:36,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:27:36,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799705826] [2024-06-14 11:27:36,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:36,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:27:36,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:36,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:27:36,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:27:37,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:37,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 513 transitions, 6171 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:37,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:37,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:37,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:38,558 INFO L124 PetriNetUnfolderBase]: 4285/7206 cut-off events. [2024-06-14 11:27:38,559 INFO L125 PetriNetUnfolderBase]: For 1132355/1132363 co-relation queries the response was YES. [2024-06-14 11:27:38,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51934 conditions, 7206 events. 4285/7206 cut-off events. For 1132355/1132363 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 51371 event pairs, 1238 based on Foata normal form. 32/7237 useless extension candidates. Maximal degree in co-relation 51723. Up to 5632 conditions per place. [2024-06-14 11:27:38,649 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 311 selfloop transitions, 223 changer transitions 19/559 dead transitions. [2024-06-14 11:27:38,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 559 transitions, 7815 flow [2024-06-14 11:27:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:27:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:27:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 281 transitions. [2024-06-14 11:27:38,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272045028142589 [2024-06-14 11:27:38,650 INFO L175 Difference]: Start difference. First operand has 505 places, 513 transitions, 6171 flow. Second operand 13 states and 281 transitions. [2024-06-14 11:27:38,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 559 transitions, 7815 flow [2024-06-14 11:27:44,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 559 transitions, 7467 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-14 11:27:44,152 INFO L231 Difference]: Finished difference. Result has 499 places, 509 transitions, 6224 flow [2024-06-14 11:27:44,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5825, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6224, PETRI_PLACES=499, PETRI_TRANSITIONS=509} [2024-06-14 11:27:44,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-14 11:27:44,153 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 509 transitions, 6224 flow [2024-06-14 11:27:44,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:44,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:44,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:44,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-14 11:27:44,153 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:27:44,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:44,154 INFO L85 PathProgramCache]: Analyzing trace with hash -214032529, now seen corresponding path program 8 times [2024-06-14 11:27:44,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:44,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929723624] [2024-06-14 11:27:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:44,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:44,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:44,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929723624] [2024-06-14 11:27:44,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929723624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:44,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:44,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:27:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054129159] [2024-06-14 11:27:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:44,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:27:44,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:44,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:27:44,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:27:44,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:44,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 509 transitions, 6224 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:44,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:44,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:44,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:45,901 INFO L124 PetriNetUnfolderBase]: 4197/7066 cut-off events. [2024-06-14 11:27:45,901 INFO L125 PetriNetUnfolderBase]: For 1144569/1144577 co-relation queries the response was YES. [2024-06-14 11:27:45,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50921 conditions, 7066 events. 4197/7066 cut-off events. For 1144569/1144577 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 50198 event pairs, 1276 based on Foata normal form. 34/7099 useless extension candidates. Maximal degree in co-relation 50712. Up to 6083 conditions per place. [2024-06-14 11:27:45,989 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 303 selfloop transitions, 220 changer transitions 12/541 dead transitions. [2024-06-14 11:27:45,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 541 transitions, 7430 flow [2024-06-14 11:27:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:27:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:27:45,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-14 11:27:45,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065666041275797 [2024-06-14 11:27:45,990 INFO L175 Difference]: Start difference. First operand has 499 places, 509 transitions, 6224 flow. Second operand 13 states and 270 transitions. [2024-06-14 11:27:45,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 541 transitions, 7430 flow [2024-06-14 11:27:52,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 541 transitions, 7018 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 11:27:52,237 INFO L231 Difference]: Finished difference. Result has 497 places, 505 transitions, 6229 flow [2024-06-14 11:27:52,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5812, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6229, PETRI_PLACES=497, PETRI_TRANSITIONS=505} [2024-06-14 11:27:52,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-14 11:27:52,237 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 505 transitions, 6229 flow [2024-06-14 11:27:52,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:52,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:27:52,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:27:52,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-14 11:27:52,238 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:27:52,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:27:52,238 INFO L85 PathProgramCache]: Analyzing trace with hash -590284113, now seen corresponding path program 9 times [2024-06-14 11:27:52,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:27:52,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006877088] [2024-06-14 11:27:52,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:27:52,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:27:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:27:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:27:52,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:27:52,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006877088] [2024-06-14 11:27:52,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006877088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:27:52,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:27:52,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:27:52,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952184276] [2024-06-14 11:27:52,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:27:52,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:27:52,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:27:52,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:27:52,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:27:52,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:27:52,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 505 transitions, 6229 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:27:52,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:27:52,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:27:52,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:27:54,020 INFO L124 PetriNetUnfolderBase]: 4357/7358 cut-off events. [2024-06-14 11:27:54,021 INFO L125 PetriNetUnfolderBase]: For 1425122/1425130 co-relation queries the response was YES. [2024-06-14 11:27:54,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57776 conditions, 7358 events. 4357/7358 cut-off events. For 1425122/1425130 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 52626 event pairs, 1249 based on Foata normal form. 26/7383 useless extension candidates. Maximal degree in co-relation 57568. Up to 4899 conditions per place. [2024-06-14 11:27:54,107 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 310 selfloop transitions, 223 changer transitions 16/555 dead transitions. [2024-06-14 11:27:54,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 555 transitions, 8157 flow [2024-06-14 11:27:54,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:27:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:27:54,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 270 transitions. [2024-06-14 11:27:54,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 11:27:54,108 INFO L175 Difference]: Start difference. First operand has 497 places, 505 transitions, 6229 flow. Second operand 12 states and 270 transitions. [2024-06-14 11:27:54,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 555 transitions, 8157 flow [2024-06-14 11:28:01,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 555 transitions, 7705 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-14 11:28:01,617 INFO L231 Difference]: Finished difference. Result has 494 places, 502 transitions, 6206 flow [2024-06-14 11:28:01,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5785, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6206, PETRI_PLACES=494, PETRI_TRANSITIONS=502} [2024-06-14 11:28:01,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-14 11:28:01,618 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 502 transitions, 6206 flow [2024-06-14 11:28:01,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:28:01,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:01,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:28:01,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-14 11:28:01,618 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:28:01,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:01,618 INFO L85 PathProgramCache]: Analyzing trace with hash 153709259, now seen corresponding path program 10 times [2024-06-14 11:28:01,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:01,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475231812] [2024-06-14 11:28:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:01,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:01,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:01,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475231812] [2024-06-14 11:28:01,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475231812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:01,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:01,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:28:01,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647658406] [2024-06-14 11:28:01,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:01,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:28:01,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:01,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:28:01,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:28:01,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:01,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 502 transitions, 6206 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:28:01,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:01,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:01,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:03,355 INFO L124 PetriNetUnfolderBase]: 4306/7265 cut-off events. [2024-06-14 11:28:03,355 INFO L125 PetriNetUnfolderBase]: For 1459687/1459695 co-relation queries the response was YES. [2024-06-14 11:28:03,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57526 conditions, 7265 events. 4306/7265 cut-off events. For 1459687/1459695 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 52080 event pairs, 1360 based on Foata normal form. 32/7296 useless extension candidates. Maximal degree in co-relation 57319. Up to 6243 conditions per place. [2024-06-14 11:28:03,444 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 216 changer transitions 21/538 dead transitions. [2024-06-14 11:28:03,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 538 transitions, 7454 flow [2024-06-14 11:28:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:28:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:28:03,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 271 transitions. [2024-06-14 11:28:03,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084427767354597 [2024-06-14 11:28:03,445 INFO L175 Difference]: Start difference. First operand has 494 places, 502 transitions, 6206 flow. Second operand 13 states and 271 transitions. [2024-06-14 11:28:03,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 538 transitions, 7454 flow [2024-06-14 11:28:10,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 538 transitions, 7018 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:28:10,311 INFO L231 Difference]: Finished difference. Result has 493 places, 497 transitions, 6152 flow [2024-06-14 11:28:10,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5770, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6152, PETRI_PLACES=493, PETRI_TRANSITIONS=497} [2024-06-14 11:28:10,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-14 11:28:10,312 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 497 transitions, 6152 flow [2024-06-14 11:28:10,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:28:10,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:10,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:28:10,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-14 11:28:10,313 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:28:10,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:10,313 INFO L85 PathProgramCache]: Analyzing trace with hash -586565043, now seen corresponding path program 11 times [2024-06-14 11:28:10,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:10,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612615598] [2024-06-14 11:28:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:10,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:10,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:10,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612615598] [2024-06-14 11:28:10,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612615598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:10,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:10,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:28:10,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930064834] [2024-06-14 11:28:10,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:10,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:28:10,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:10,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:28:10,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:28:10,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:10,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 497 transitions, 6152 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:28:10,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:10,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:10,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:12,064 INFO L124 PetriNetUnfolderBase]: 4249/7155 cut-off events. [2024-06-14 11:28:12,065 INFO L125 PetriNetUnfolderBase]: For 1386795/1386807 co-relation queries the response was YES. [2024-06-14 11:28:12,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56797 conditions, 7155 events. 4249/7155 cut-off events. For 1386795/1386807 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 50904 event pairs, 1216 based on Foata normal form. 30/7185 useless extension candidates. Maximal degree in co-relation 56591. Up to 5923 conditions per place. [2024-06-14 11:28:12,157 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 428 selfloop transitions, 98 changer transitions 8/540 dead transitions. [2024-06-14 11:28:12,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 540 transitions, 7726 flow [2024-06-14 11:28:12,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:28:12,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:28:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-14 11:28:12,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223577235772358 [2024-06-14 11:28:12,157 INFO L175 Difference]: Start difference. First operand has 493 places, 497 transitions, 6152 flow. Second operand 12 states and 257 transitions. [2024-06-14 11:28:12,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 540 transitions, 7726 flow [2024-06-14 11:28:19,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 540 transitions, 7278 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-14 11:28:19,465 INFO L231 Difference]: Finished difference. Result has 487 places, 495 transitions, 5890 flow [2024-06-14 11:28:19,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5710, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5890, PETRI_PLACES=487, PETRI_TRANSITIONS=495} [2024-06-14 11:28:19,466 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-14 11:28:19,466 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 495 transitions, 5890 flow [2024-06-14 11:28:19,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:28:19,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:19,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:28:19,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-14 11:28:19,466 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:28:19,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:19,466 INFO L85 PathProgramCache]: Analyzing trace with hash 256120541, now seen corresponding path program 12 times [2024-06-14 11:28:19,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:19,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609069228] [2024-06-14 11:28:19,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:19,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:19,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:19,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609069228] [2024-06-14 11:28:19,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609069228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:19,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:19,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:28:19,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451678861] [2024-06-14 11:28:19,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:19,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:28:19,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:19,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:28:19,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:28:19,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:19,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 495 transitions, 5890 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:28:19,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:19,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:19,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:21,209 INFO L124 PetriNetUnfolderBase]: 4144/6968 cut-off events. [2024-06-14 11:28:21,210 INFO L125 PetriNetUnfolderBase]: For 1197055/1197067 co-relation queries the response was YES. [2024-06-14 11:28:21,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53229 conditions, 6968 events. 4144/6968 cut-off events. For 1197055/1197067 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 49264 event pairs, 1204 based on Foata normal form. 30/6998 useless extension candidates. Maximal degree in co-relation 53025. Up to 5923 conditions per place. [2024-06-14 11:28:21,295 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 413 selfloop transitions, 95 changer transitions 19/533 dead transitions. [2024-06-14 11:28:21,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 533 transitions, 7136 flow [2024-06-14 11:28:21,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:28:21,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:28:21,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-14 11:28:21,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101626016260162 [2024-06-14 11:28:21,296 INFO L175 Difference]: Start difference. First operand has 487 places, 495 transitions, 5890 flow. Second operand 12 states and 251 transitions. [2024-06-14 11:28:21,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 533 transitions, 7136 flow [2024-06-14 11:28:28,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 533 transitions, 6937 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 11:28:28,382 INFO L231 Difference]: Finished difference. Result has 486 places, 491 transitions, 5830 flow [2024-06-14 11:28:28,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5691, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5830, PETRI_PLACES=486, PETRI_TRANSITIONS=491} [2024-06-14 11:28:28,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-14 11:28:28,382 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 491 transitions, 5830 flow [2024-06-14 11:28:28,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:28:28,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:28,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:28:28,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-14 11:28:28,382 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:28:28,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:28,383 INFO L85 PathProgramCache]: Analyzing trace with hash -934973555, now seen corresponding path program 13 times [2024-06-14 11:28:28,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:28,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581000774] [2024-06-14 11:28:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:28,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:28,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:28,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581000774] [2024-06-14 11:28:28,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581000774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:28,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:28,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:28:28,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195106897] [2024-06-14 11:28:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:28,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:28:28,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:28,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:28:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:28:28,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:28,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 491 transitions, 5830 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:28:28,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:28,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:28,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:30,087 INFO L124 PetriNetUnfolderBase]: 4136/6952 cut-off events. [2024-06-14 11:28:30,087 INFO L125 PetriNetUnfolderBase]: For 1248911/1248923 co-relation queries the response was YES. [2024-06-14 11:28:30,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53063 conditions, 6952 events. 4136/6952 cut-off events. For 1248911/1248923 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 49212 event pairs, 1294 based on Foata normal form. 38/6990 useless extension candidates. Maximal degree in co-relation 52860. Up to 6190 conditions per place. [2024-06-14 11:28:30,177 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 413 selfloop transitions, 89 changer transitions 12/520 dead transitions. [2024-06-14 11:28:30,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 520 transitions, 6986 flow [2024-06-14 11:28:30,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:28:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:28:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 263 transitions. [2024-06-14 11:28:30,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49343339587242024 [2024-06-14 11:28:30,178 INFO L175 Difference]: Start difference. First operand has 486 places, 491 transitions, 5830 flow. Second operand 13 states and 263 transitions. [2024-06-14 11:28:30,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 520 transitions, 6986 flow [2024-06-14 11:28:36,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 520 transitions, 6765 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 11:28:36,420 INFO L231 Difference]: Finished difference. Result has 481 places, 487 transitions, 5750 flow [2024-06-14 11:28:36,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5609, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5750, PETRI_PLACES=481, PETRI_TRANSITIONS=487} [2024-06-14 11:28:36,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-14 11:28:36,421 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 487 transitions, 5750 flow [2024-06-14 11:28:36,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:28:36,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:36,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:28:36,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-14 11:28:36,421 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:28:36,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:36,421 INFO L85 PathProgramCache]: Analyzing trace with hash -939883955, now seen corresponding path program 14 times [2024-06-14 11:28:36,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:36,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096602313] [2024-06-14 11:28:36,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:36,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:36,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:36,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096602313] [2024-06-14 11:28:36,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096602313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:36,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:36,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:28:36,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731234332] [2024-06-14 11:28:36,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:36,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:28:36,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:36,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:28:36,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:28:36,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:36,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 487 transitions, 5750 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:28:36,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:36,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:36,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:38,467 INFO L124 PetriNetUnfolderBase]: 4342/7318 cut-off events. [2024-06-14 11:28:38,467 INFO L125 PetriNetUnfolderBase]: For 1590165/1590177 co-relation queries the response was YES. [2024-06-14 11:28:38,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61108 conditions, 7318 events. 4342/7318 cut-off events. For 1590165/1590177 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 52548 event pairs, 1349 based on Foata normal form. 30/7348 useless extension candidates. Maximal degree in co-relation 60906. Up to 6010 conditions per place. [2024-06-14 11:28:38,571 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 425 selfloop transitions, 91 changer transitions 8/530 dead transitions. [2024-06-14 11:28:38,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 530 transitions, 7572 flow [2024-06-14 11:28:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:28:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:28:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 289 transitions. [2024-06-14 11:28:38,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034843205574913 [2024-06-14 11:28:38,572 INFO L175 Difference]: Start difference. First operand has 481 places, 487 transitions, 5750 flow. Second operand 14 states and 289 transitions. [2024-06-14 11:28:38,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 530 transitions, 7572 flow [2024-06-14 11:28:45,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 530 transitions, 7388 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-14 11:28:45,760 INFO L231 Difference]: Finished difference. Result has 481 places, 485 transitions, 5729 flow [2024-06-14 11:28:45,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5570, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5729, PETRI_PLACES=481, PETRI_TRANSITIONS=485} [2024-06-14 11:28:45,760 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-14 11:28:45,760 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 485 transitions, 5729 flow [2024-06-14 11:28:45,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:28:45,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:45,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:28:45,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-14 11:28:45,761 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:28:45,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:45,761 INFO L85 PathProgramCache]: Analyzing trace with hash -935299985, now seen corresponding path program 15 times [2024-06-14 11:28:45,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:45,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055379312] [2024-06-14 11:28:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:45,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:45,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:45,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055379312] [2024-06-14 11:28:45,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055379312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:45,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:45,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:28:45,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722284181] [2024-06-14 11:28:45,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:45,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:28:45,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:45,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:28:45,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:28:46,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:46,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 485 transitions, 5729 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:28:46,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:46,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:46,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:47,611 INFO L124 PetriNetUnfolderBase]: 4338/7304 cut-off events. [2024-06-14 11:28:47,611 INFO L125 PetriNetUnfolderBase]: For 1638495/1638507 co-relation queries the response was YES. [2024-06-14 11:28:47,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61170 conditions, 7304 events. 4338/7304 cut-off events. For 1638495/1638507 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 52395 event pairs, 1409 based on Foata normal form. 36/7340 useless extension candidates. Maximal degree in co-relation 60968. Up to 6286 conditions per place. [2024-06-14 11:28:47,704 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 418 selfloop transitions, 86 changer transitions 11/521 dead transitions. [2024-06-14 11:28:47,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 521 transitions, 7221 flow [2024-06-14 11:28:47,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:28:47,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:28:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 267 transitions. [2024-06-14 11:28:47,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50093808630394 [2024-06-14 11:28:47,704 INFO L175 Difference]: Start difference. First operand has 481 places, 485 transitions, 5729 flow. Second operand 13 states and 267 transitions. [2024-06-14 11:28:47,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 521 transitions, 7221 flow [2024-06-14 11:28:54,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 521 transitions, 7035 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-14 11:28:54,521 INFO L231 Difference]: Finished difference. Result has 479 places, 481 transitions, 5654 flow [2024-06-14 11:28:54,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5654, PETRI_PLACES=479, PETRI_TRANSITIONS=481} [2024-06-14 11:28:54,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-14 11:28:54,521 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 481 transitions, 5654 flow [2024-06-14 11:28:54,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:28:54,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:28:54,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:28:54,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-14 11:28:54,521 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:28:54,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:28:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash -939878375, now seen corresponding path program 16 times [2024-06-14 11:28:54,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:28:54,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818466252] [2024-06-14 11:28:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:28:54,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:28:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:28:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:28:54,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:28:54,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818466252] [2024-06-14 11:28:54,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818466252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:28:54,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:28:54,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:28:54,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797497608] [2024-06-14 11:28:54,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:28:54,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:28:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:28:54,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:28:54,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:28:54,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:28:54,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 481 transitions, 5654 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:28:54,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:28:54,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:28:54,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:28:56,296 INFO L124 PetriNetUnfolderBase]: 4285/7209 cut-off events. [2024-06-14 11:28:56,296 INFO L125 PetriNetUnfolderBase]: For 1591667/1591679 co-relation queries the response was YES. [2024-06-14 11:28:56,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60537 conditions, 7209 events. 4285/7209 cut-off events. For 1591667/1591679 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 51425 event pairs, 1399 based on Foata normal form. 30/7239 useless extension candidates. Maximal degree in co-relation 60336. Up to 6010 conditions per place. [2024-06-14 11:28:56,386 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 416 selfloop transitions, 85 changer transitions 13/520 dead transitions. [2024-06-14 11:28:56,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 520 transitions, 7150 flow [2024-06-14 11:28:56,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:28:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:28:56,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 284 transitions. [2024-06-14 11:28:56,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49477351916376305 [2024-06-14 11:28:56,387 INFO L175 Difference]: Start difference. First operand has 479 places, 481 transitions, 5654 flow. Second operand 14 states and 284 transitions. [2024-06-14 11:28:56,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 520 transitions, 7150 flow [2024-06-14 11:29:03,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 520 transitions, 6964 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-06-14 11:29:03,492 INFO L231 Difference]: Finished difference. Result has 476 places, 478 transitions, 5596 flow [2024-06-14 11:29:03,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5470, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5596, PETRI_PLACES=476, PETRI_TRANSITIONS=478} [2024-06-14 11:29:03,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-14 11:29:03,493 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 478 transitions, 5596 flow [2024-06-14 11:29:03,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:03,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:03,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:03,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-14 11:29:03,493 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:29:03,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:03,494 INFO L85 PathProgramCache]: Analyzing trace with hash -929611175, now seen corresponding path program 17 times [2024-06-14 11:29:03,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:03,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545231722] [2024-06-14 11:29:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:03,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:03,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:03,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545231722] [2024-06-14 11:29:03,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545231722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:03,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:03,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:29:03,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377371084] [2024-06-14 11:29:03,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:03,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:29:03,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:03,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:29:03,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:29:03,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:03,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 478 transitions, 5596 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:03,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:03,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:03,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:05,324 INFO L124 PetriNetUnfolderBase]: 4160/6996 cut-off events. [2024-06-14 11:29:05,324 INFO L125 PetriNetUnfolderBase]: For 1441630/1441642 co-relation queries the response was YES. [2024-06-14 11:29:05,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56049 conditions, 6996 events. 4160/6996 cut-off events. For 1441630/1441642 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 49733 event pairs, 1358 based on Foata normal form. 38/7034 useless extension candidates. Maximal degree in co-relation 55850. Up to 6244 conditions per place. [2024-06-14 11:29:05,429 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 407 selfloop transitions, 81 changer transitions 12/506 dead transitions. [2024-06-14 11:29:05,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 506 transitions, 6722 flow [2024-06-14 11:29:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:29:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:29:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 243 transitions. [2024-06-14 11:29:05,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49390243902439024 [2024-06-14 11:29:05,430 INFO L175 Difference]: Start difference. First operand has 476 places, 478 transitions, 5596 flow. Second operand 12 states and 243 transitions. [2024-06-14 11:29:05,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 506 transitions, 6722 flow [2024-06-14 11:29:12,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 506 transitions, 6551 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-14 11:29:12,069 INFO L231 Difference]: Finished difference. Result has 472 places, 474 transitions, 5545 flow [2024-06-14 11:29:12,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5425, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5545, PETRI_PLACES=472, PETRI_TRANSITIONS=474} [2024-06-14 11:29:12,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-14 11:29:12,069 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 474 transitions, 5545 flow [2024-06-14 11:29:12,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:12,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:12,069 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, 1, 1] [2024-06-14 11:29:12,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2024-06-14 11:29:12,069 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:29:12,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:12,070 INFO L85 PathProgramCache]: Analyzing trace with hash 243427207, now seen corresponding path program 18 times [2024-06-14 11:29:12,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:12,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419729505] [2024-06-14 11:29:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:12,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:12,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:12,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419729505] [2024-06-14 11:29:12,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419729505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:12,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:12,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:29:12,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820737181] [2024-06-14 11:29:12,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:12,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:29:12,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:12,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:29:12,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:29:12,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:12,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 474 transitions, 5545 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:12,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:12,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:12,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:13,797 INFO L124 PetriNetUnfolderBase]: 4031/6787 cut-off events. [2024-06-14 11:29:13,797 INFO L125 PetriNetUnfolderBase]: For 1222962/1222974 co-relation queries the response was YES. [2024-06-14 11:29:13,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51778 conditions, 6787 events. 4031/6787 cut-off events. For 1222962/1222974 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 47906 event pairs, 1234 based on Foata normal form. 36/6823 useless extension candidates. Maximal degree in co-relation 51580. Up to 6010 conditions per place. [2024-06-14 11:29:13,880 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 401 selfloop transitions, 76 changer transitions 23/506 dead transitions. [2024-06-14 11:29:13,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 506 transitions, 6723 flow [2024-06-14 11:29:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:29:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:29:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-14 11:29:13,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-14 11:29:13,881 INFO L175 Difference]: Start difference. First operand has 472 places, 474 transitions, 5545 flow. Second operand 12 states and 244 transitions. [2024-06-14 11:29:13,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 506 transitions, 6723 flow [2024-06-14 11:29:19,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 506 transitions, 6559 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-14 11:29:19,997 INFO L231 Difference]: Finished difference. Result has 470 places, 468 transitions, 5451 flow [2024-06-14 11:29:19,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5381, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5451, PETRI_PLACES=470, PETRI_TRANSITIONS=468} [2024-06-14 11:29:19,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-14 11:29:19,997 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 468 transitions, 5451 flow [2024-06-14 11:29:19,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:19,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:19,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:19,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2024-06-14 11:29:19,998 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:29:19,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1268887431, now seen corresponding path program 19 times [2024-06-14 11:29:19,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:19,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426661927] [2024-06-14 11:29:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:19,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:20,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:20,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426661927] [2024-06-14 11:29:20,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426661927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:20,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:20,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:29:20,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751780867] [2024-06-14 11:29:20,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:20,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:29:20,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:20,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:29:20,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:29:20,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:20,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 468 transitions, 5451 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:20,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:20,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:20,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:21,697 INFO L124 PetriNetUnfolderBase]: 4120/6935 cut-off events. [2024-06-14 11:29:21,697 INFO L125 PetriNetUnfolderBase]: For 1441332/1441343 co-relation queries the response was YES. [2024-06-14 11:29:21,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55782 conditions, 6935 events. 4120/6935 cut-off events. For 1441332/1441343 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 49216 event pairs, 1315 based on Foata normal form. 35/6970 useless extension candidates. Maximal degree in co-relation 55584. Up to 5935 conditions per place. [2024-06-14 11:29:21,779 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 393 selfloop transitions, 93 changer transitions 10/502 dead transitions. [2024-06-14 11:29:21,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 502 transitions, 6899 flow [2024-06-14 11:29:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:29:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:29:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 282 transitions. [2024-06-14 11:29:21,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-14 11:29:21,780 INFO L175 Difference]: Start difference. First operand has 470 places, 468 transitions, 5451 flow. Second operand 14 states and 282 transitions. [2024-06-14 11:29:21,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 502 transitions, 6899 flow [2024-06-14 11:29:28,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 502 transitions, 6719 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 11:29:28,969 INFO L231 Difference]: Finished difference. Result has 464 places, 465 transitions, 5411 flow [2024-06-14 11:29:28,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5273, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5411, PETRI_PLACES=464, PETRI_TRANSITIONS=465} [2024-06-14 11:29:28,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-14 11:29:28,969 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 465 transitions, 5411 flow [2024-06-14 11:29:28,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:28,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:28,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:28,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2024-06-14 11:29:28,970 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:29:28,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:28,970 INFO L85 PathProgramCache]: Analyzing trace with hash -980149683, now seen corresponding path program 20 times [2024-06-14 11:29:28,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:28,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892995558] [2024-06-14 11:29:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:28,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:29,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:29,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892995558] [2024-06-14 11:29:29,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892995558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:29,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:29,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:29:29,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455025434] [2024-06-14 11:29:29,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:29,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:29:29,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:29,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:29:29,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:29:29,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:29,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 465 transitions, 5411 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:29,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:29,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:29,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:30,881 INFO L124 PetriNetUnfolderBase]: 4550/7657 cut-off events. [2024-06-14 11:29:30,881 INFO L125 PetriNetUnfolderBase]: For 2216475/2216486 co-relation queries the response was YES. [2024-06-14 11:29:30,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72377 conditions, 7657 events. 4550/7657 cut-off events. For 2216475/2216486 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 55284 event pairs, 1517 based on Foata normal form. 29/7686 useless extension candidates. Maximal degree in co-relation 72180. Up to 5317 conditions per place. [2024-06-14 11:29:30,983 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 398 selfloop transitions, 96 changer transitions 8/508 dead transitions. [2024-06-14 11:29:30,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 508 transitions, 7231 flow [2024-06-14 11:29:30,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:29:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:29:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 275 transitions. [2024-06-14 11:29:30,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159474671669794 [2024-06-14 11:29:30,984 INFO L175 Difference]: Start difference. First operand has 464 places, 465 transitions, 5411 flow. Second operand 13 states and 275 transitions. [2024-06-14 11:29:30,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 508 transitions, 7231 flow [2024-06-14 11:29:38,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 508 transitions, 7040 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-14 11:29:38,334 INFO L231 Difference]: Finished difference. Result has 463 places, 463 transitions, 5396 flow [2024-06-14 11:29:38,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5224, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5396, PETRI_PLACES=463, PETRI_TRANSITIONS=463} [2024-06-14 11:29:38,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-14 11:29:38,335 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 463 transitions, 5396 flow [2024-06-14 11:29:38,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:38,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:38,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:38,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2024-06-14 11:29:38,335 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:29:38,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:38,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1770299277, now seen corresponding path program 21 times [2024-06-14 11:29:38,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:38,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783525407] [2024-06-14 11:29:38,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:38,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:38,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:38,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783525407] [2024-06-14 11:29:38,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783525407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:38,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:38,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:29:38,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188881757] [2024-06-14 11:29:38,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:38,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:29:38,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:38,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:29:38,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:29:38,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:38,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 463 transitions, 5396 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:38,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:38,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:38,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:40,220 INFO L124 PetriNetUnfolderBase]: 4554/7677 cut-off events. [2024-06-14 11:29:40,220 INFO L125 PetriNetUnfolderBase]: For 2288001/2288012 co-relation queries the response was YES. [2024-06-14 11:29:40,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72609 conditions, 7677 events. 4554/7677 cut-off events. For 2288001/2288012 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 55689 event pairs, 1685 based on Foata normal form. 37/7714 useless extension candidates. Maximal degree in co-relation 72412. Up to 6886 conditions per place. [2024-06-14 11:29:40,325 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 383 selfloop transitions, 89 changer transitions 12/490 dead transitions. [2024-06-14 11:29:40,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 490 transitions, 6486 flow [2024-06-14 11:29:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:29:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:29:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 279 transitions. [2024-06-14 11:29:40,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48606271777003485 [2024-06-14 11:29:40,326 INFO L175 Difference]: Start difference. First operand has 463 places, 463 transitions, 5396 flow. Second operand 14 states and 279 transitions. [2024-06-14 11:29:40,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 490 transitions, 6486 flow [2024-06-14 11:29:47,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 490 transitions, 6293 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 11:29:47,152 INFO L231 Difference]: Finished difference. Result has 463 places, 459 transitions, 5345 flow [2024-06-14 11:29:47,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5203, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5345, PETRI_PLACES=463, PETRI_TRANSITIONS=459} [2024-06-14 11:29:47,152 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-14 11:29:47,152 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 459 transitions, 5345 flow [2024-06-14 11:29:47,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:47,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:47,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:47,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2024-06-14 11:29:47,153 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:29:47,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:47,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1769972847, now seen corresponding path program 22 times [2024-06-14 11:29:47,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:47,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629642443] [2024-06-14 11:29:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:47,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:47,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:47,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629642443] [2024-06-14 11:29:47,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629642443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:47,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:47,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:29:47,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043683403] [2024-06-14 11:29:47,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:47,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:29:47,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:47,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:29:47,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:29:47,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:47,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 459 transitions, 5345 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:47,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:47,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:47,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:48,982 INFO L124 PetriNetUnfolderBase]: 4298/7243 cut-off events. [2024-06-14 11:29:48,982 INFO L125 PetriNetUnfolderBase]: For 1851061/1851072 co-relation queries the response was YES. [2024-06-14 11:29:49,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63790 conditions, 7243 events. 4298/7243 cut-off events. For 1851061/1851072 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 51815 event pairs, 1470 based on Foata normal form. 35/7278 useless extension candidates. Maximal degree in co-relation 63594. Up to 6025 conditions per place. [2024-06-14 11:29:49,080 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 390 selfloop transitions, 86 changer transitions 11/493 dead transitions. [2024-06-14 11:29:49,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 493 transitions, 6775 flow [2024-06-14 11:29:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:29:49,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:29:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 283 transitions. [2024-06-14 11:29:49,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930313588850174 [2024-06-14 11:29:49,081 INFO L175 Difference]: Start difference. First operand has 463 places, 459 transitions, 5345 flow. Second operand 14 states and 283 transitions. [2024-06-14 11:29:49,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 493 transitions, 6775 flow [2024-06-14 11:29:55,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 493 transitions, 6587 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-14 11:29:55,336 INFO L231 Difference]: Finished difference. Result has 462 places, 455 transitions, 5270 flow [2024-06-14 11:29:55,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5270, PETRI_PLACES=462, PETRI_TRANSITIONS=455} [2024-06-14 11:29:55,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-14 11:29:55,337 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 455 transitions, 5270 flow [2024-06-14 11:29:55,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:55,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:55,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:55,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2024-06-14 11:29:55,337 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:29:55,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:55,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1002422929, now seen corresponding path program 23 times [2024-06-14 11:29:55,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:55,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356971668] [2024-06-14 11:29:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:55,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:55,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:55,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356971668] [2024-06-14 11:29:55,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356971668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:55,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:55,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:29:55,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287673073] [2024-06-14 11:29:55,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:55,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:29:55,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:55,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:29:55,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:29:55,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:29:55,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 455 transitions, 5270 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:55,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:55,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:29:55,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:57,200 INFO L124 PetriNetUnfolderBase]: 4359/7348 cut-off events. [2024-06-14 11:29:57,200 INFO L125 PetriNetUnfolderBase]: For 1998291/1998302 co-relation queries the response was YES. [2024-06-14 11:29:57,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67262 conditions, 7348 events. 4359/7348 cut-off events. For 1998291/1998302 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 52688 event pairs, 1468 based on Foata normal form. 29/7377 useless extension candidates. Maximal degree in co-relation 67066. Up to 5899 conditions per place. [2024-06-14 11:29:57,294 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 394 selfloop transitions, 88 changer transitions 8/496 dead transitions. [2024-06-14 11:29:57,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 496 transitions, 7018 flow [2024-06-14 11:29:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 11:29:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 11:29:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 304 transitions. [2024-06-14 11:29:57,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943089430894309 [2024-06-14 11:29:57,294 INFO L175 Difference]: Start difference. First operand has 462 places, 455 transitions, 5270 flow. Second operand 15 states and 304 transitions. [2024-06-14 11:29:57,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 496 transitions, 7018 flow [2024-06-14 11:30:04,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 496 transitions, 6832 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-06-14 11:30:04,165 INFO L231 Difference]: Finished difference. Result has 459 places, 453 transitions, 5242 flow [2024-06-14 11:30:04,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5088, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5242, PETRI_PLACES=459, PETRI_TRANSITIONS=453} [2024-06-14 11:30:04,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-14 11:30:04,165 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 453 transitions, 5242 flow [2024-06-14 11:30:04,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:04,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:04,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:04,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2024-06-14 11:30:04,166 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:04,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:04,166 INFO L85 PathProgramCache]: Analyzing trace with hash 250662715, now seen corresponding path program 24 times [2024-06-14 11:30:04,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:04,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766532422] [2024-06-14 11:30:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:04,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:04,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:04,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766532422] [2024-06-14 11:30:04,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766532422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:04,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:04,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:30:04,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118022466] [2024-06-14 11:30:04,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:04,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:30:04,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:04,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:30:04,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:30:04,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:30:04,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 453 transitions, 5242 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:04,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:04,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:30:04,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:05,932 INFO L124 PetriNetUnfolderBase]: 4236/7135 cut-off events. [2024-06-14 11:30:05,932 INFO L125 PetriNetUnfolderBase]: For 1852686/1852697 co-relation queries the response was YES. [2024-06-14 11:30:06,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62896 conditions, 7135 events. 4236/7135 cut-off events. For 1852686/1852697 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 50955 event pairs, 1499 based on Foata normal form. 37/7172 useless extension candidates. Maximal degree in co-relation 62702. Up to 6386 conditions per place. [2024-06-14 11:30:06,031 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 378 selfloop transitions, 81 changer transitions 14/479 dead transitions. [2024-06-14 11:30:06,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 479 transitions, 6308 flow [2024-06-14 11:30:06,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:30:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:30:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 258 transitions. [2024-06-14 11:30:06,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48405253283302063 [2024-06-14 11:30:06,032 INFO L175 Difference]: Start difference. First operand has 459 places, 453 transitions, 5242 flow. Second operand 13 states and 258 transitions. [2024-06-14 11:30:06,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 479 transitions, 6308 flow [2024-06-14 11:30:11,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 479 transitions, 6130 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-06-14 11:30:11,817 INFO L231 Difference]: Finished difference. Result has 456 places, 448 transitions, 5176 flow [2024-06-14 11:30:11,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5176, PETRI_PLACES=456, PETRI_TRANSITIONS=448} [2024-06-14 11:30:11,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-14 11:30:11,817 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 448 transitions, 5176 flow [2024-06-14 11:30:11,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:11,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:11,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:11,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2024-06-14 11:30:11,817 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:11,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:11,818 INFO L85 PathProgramCache]: Analyzing trace with hash 944336059, now seen corresponding path program 25 times [2024-06-14 11:30:11,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:11,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105366533] [2024-06-14 11:30:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:11,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:11,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:11,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105366533] [2024-06-14 11:30:11,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105366533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:11,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:11,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:30:11,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286903869] [2024-06-14 11:30:11,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:11,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:30:11,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:11,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:30:11,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:30:12,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:30:12,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 448 transitions, 5176 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:12,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:12,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:30:12,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:13,620 INFO L124 PetriNetUnfolderBase]: 4327/7306 cut-off events. [2024-06-14 11:30:13,621 INFO L125 PetriNetUnfolderBase]: For 1994496/1994507 co-relation queries the response was YES. [2024-06-14 11:30:13,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66979 conditions, 7306 events. 4327/7306 cut-off events. For 1994496/1994507 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 52460 event pairs, 1440 based on Foata normal form. 29/7335 useless extension candidates. Maximal degree in co-relation 66786. Up to 5317 conditions per place. [2024-06-14 11:30:13,715 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 389 selfloop transitions, 82 changer transitions 13/490 dead transitions. [2024-06-14 11:30:13,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 490 transitions, 6936 flow [2024-06-14 11:30:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:30:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:30:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-06-14 11:30:13,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:30:13,716 INFO L175 Difference]: Start difference. First operand has 456 places, 448 transitions, 5176 flow. Second operand 13 states and 273 transitions. [2024-06-14 11:30:13,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 490 transitions, 6936 flow [2024-06-14 11:30:19,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 490 transitions, 6762 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 11:30:19,816 INFO L231 Difference]: Finished difference. Result has 453 places, 445 transitions, 5128 flow [2024-06-14 11:30:19,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5006, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5128, PETRI_PLACES=453, PETRI_TRANSITIONS=445} [2024-06-14 11:30:19,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-14 11:30:19,817 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 445 transitions, 5128 flow [2024-06-14 11:30:19,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:19,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:19,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:19,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2024-06-14 11:30:19,817 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:19,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:19,817 INFO L85 PathProgramCache]: Analyzing trace with hash 161949085, now seen corresponding path program 26 times [2024-06-14 11:30:19,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:19,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942138673] [2024-06-14 11:30:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:19,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:19,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:19,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942138673] [2024-06-14 11:30:19,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942138673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:19,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:19,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:30:19,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881289045] [2024-06-14 11:30:19,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:19,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:30:19,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:19,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:30:19,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:30:20,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:30:20,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 445 transitions, 5128 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:20,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:20,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:30:20,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:21,719 INFO L124 PetriNetUnfolderBase]: 4481/7576 cut-off events. [2024-06-14 11:30:21,719 INFO L125 PetriNetUnfolderBase]: For 2339287/2339298 co-relation queries the response was YES. [2024-06-14 11:30:21,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72867 conditions, 7576 events. 4481/7576 cut-off events. For 2339287/2339298 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 54936 event pairs, 1666 based on Foata normal form. 35/7611 useless extension candidates. Maximal degree in co-relation 72674. Up to 6015 conditions per place. [2024-06-14 11:30:21,811 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 78 changer transitions 17/482 dead transitions. [2024-06-14 11:30:21,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 482 transitions, 6586 flow [2024-06-14 11:30:21,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:30:21,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:30:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 267 transitions. [2024-06-14 11:30:21,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50093808630394 [2024-06-14 11:30:21,812 INFO L175 Difference]: Start difference. First operand has 453 places, 445 transitions, 5128 flow. Second operand 13 states and 267 transitions. [2024-06-14 11:30:21,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 482 transitions, 6586 flow [2024-06-14 11:30:28,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 482 transitions, 6414 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 11:30:28,566 INFO L231 Difference]: Finished difference. Result has 452 places, 440 transitions, 5009 flow [2024-06-14 11:30:28,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4958, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5009, PETRI_PLACES=452, PETRI_TRANSITIONS=440} [2024-06-14 11:30:28,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-14 11:30:28,567 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 440 transitions, 5009 flow [2024-06-14 11:30:28,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:28,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:28,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:28,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2024-06-14 11:30:28,567 INFO L420 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:28,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:28,567 INFO L85 PathProgramCache]: Analyzing trace with hash 278302901, now seen corresponding path program 27 times [2024-06-14 11:30:28,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:28,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206438829] [2024-06-14 11:30:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:28,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:28,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:28,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206438829] [2024-06-14 11:30:28,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206438829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:28,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:28,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:30:28,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712840555] [2024-06-14 11:30:28,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:28,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:30:28,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:28,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:30:28,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:30:28,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:30:28,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 440 transitions, 5009 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:28,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:28,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:30:28,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:30,275 INFO L124 PetriNetUnfolderBase]: 4187/7068 cut-off events. [2024-06-14 11:30:30,275 INFO L125 PetriNetUnfolderBase]: For 1946274/1946285 co-relation queries the response was YES. [2024-06-14 11:30:30,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63563 conditions, 7068 events. 4187/7068 cut-off events. For 1946274/1946285 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 50494 event pairs, 1533 based on Foata normal form. 37/7105 useless extension candidates. Maximal degree in co-relation 63370. Up to 6328 conditions per place. [2024-06-14 11:30:30,360 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 374 selfloop transitions, 74 changer transitions 12/466 dead transitions. [2024-06-14 11:30:30,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 466 transitions, 6049 flow [2024-06-14 11:30:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:30:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:30:30,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 259 transitions. [2024-06-14 11:30:30,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48592870544090055 [2024-06-14 11:30:30,362 INFO L175 Difference]: Start difference. First operand has 452 places, 440 transitions, 5009 flow. Second operand 13 states and 259 transitions. [2024-06-14 11:30:30,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 466 transitions, 6049 flow [2024-06-14 11:30:36,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 466 transitions, 5888 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-14 11:30:36,491 INFO L231 Difference]: Finished difference. Result has 448 places, 436 transitions, 4954 flow [2024-06-14 11:30:36,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4848, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4954, PETRI_PLACES=448, PETRI_TRANSITIONS=436} [2024-06-14 11:30:36,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-14 11:30:36,491 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 436 transitions, 4954 flow [2024-06-14 11:30:36,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:36,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:36,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:36,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2024-06-14 11:30:36,492 INFO L420 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:36,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:36,492 INFO L85 PathProgramCache]: Analyzing trace with hash 268035701, now seen corresponding path program 28 times [2024-06-14 11:30:36,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:36,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521444948] [2024-06-14 11:30:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:36,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:36,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:36,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521444948] [2024-06-14 11:30:36,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521444948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:36,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:36,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:30:36,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966232084] [2024-06-14 11:30:36,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:36,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:30:36,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:36,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:30:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:30:36,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:30:36,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 436 transitions, 4954 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:36,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:36,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:30:36,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:38,236 INFO L124 PetriNetUnfolderBase]: 4071/6876 cut-off events. [2024-06-14 11:30:38,236 INFO L125 PetriNetUnfolderBase]: For 1730480/1730491 co-relation queries the response was YES. [2024-06-14 11:30:38,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60170 conditions, 6876 events. 4071/6876 cut-off events. For 1730480/1730491 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 48873 event pairs, 1418 based on Foata normal form. 29/6905 useless extension candidates. Maximal degree in co-relation 59978. Up to 5917 conditions per place. [2024-06-14 11:30:38,316 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 73 changer transitions 13/472 dead transitions. [2024-06-14 11:30:38,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 472 transitions, 6346 flow [2024-06-14 11:30:38,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:30:38,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:30:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 281 transitions. [2024-06-14 11:30:38,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895470383275261 [2024-06-14 11:30:38,317 INFO L175 Difference]: Start difference. First operand has 448 places, 436 transitions, 4954 flow. Second operand 14 states and 281 transitions. [2024-06-14 11:30:38,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 472 transitions, 6346 flow [2024-06-14 11:30:42,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 472 transitions, 6134 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-14 11:30:42,909 INFO L231 Difference]: Finished difference. Result has 446 places, 433 transitions, 4846 flow [2024-06-14 11:30:42,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4744, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4846, PETRI_PLACES=446, PETRI_TRANSITIONS=433} [2024-06-14 11:30:42,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-14 11:30:42,909 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 433 transitions, 4846 flow [2024-06-14 11:30:42,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:42,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:42,910 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, 1, 1] [2024-06-14 11:30:42,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2024-06-14 11:30:42,910 INFO L420 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:42,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:42,910 INFO L85 PathProgramCache]: Analyzing trace with hash 951687709, now seen corresponding path program 29 times [2024-06-14 11:30:42,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:42,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528731526] [2024-06-14 11:30:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:42,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:43,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:43,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528731526] [2024-06-14 11:30:43,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528731526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:43,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:43,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:30:43,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779031667] [2024-06-14 11:30:43,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:43,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:30:43,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:43,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:30:43,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:30:43,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:30:43,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 433 transitions, 4846 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:43,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:43,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:30:43,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:44,721 INFO L124 PetriNetUnfolderBase]: 4078/6881 cut-off events. [2024-06-14 11:30:44,721 INFO L125 PetriNetUnfolderBase]: For 1779179/1779190 co-relation queries the response was YES. [2024-06-14 11:30:44,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60893 conditions, 6881 events. 4078/6881 cut-off events. For 1779179/1779190 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 48787 event pairs, 1367 based on Foata normal form. 29/6910 useless extension candidates. Maximal degree in co-relation 60702. Up to 5317 conditions per place. [2024-06-14 11:30:44,800 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 74 changer transitions 14/475 dead transitions. [2024-06-14 11:30:44,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 475 transitions, 6576 flow [2024-06-14 11:30:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:30:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:30:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 272 transitions. [2024-06-14 11:30:44,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103189493433395 [2024-06-14 11:30:44,801 INFO L175 Difference]: Start difference. First operand has 446 places, 433 transitions, 4846 flow. Second operand 13 states and 272 transitions. [2024-06-14 11:30:44,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 475 transitions, 6576 flow [2024-06-14 11:30:49,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 475 transitions, 6420 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-14 11:30:49,456 INFO L231 Difference]: Finished difference. Result has 443 places, 429 transitions, 4768 flow [2024-06-14 11:30:49,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4694, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4768, PETRI_PLACES=443, PETRI_TRANSITIONS=429} [2024-06-14 11:30:49,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-14 11:30:49,456 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 429 transitions, 4768 flow [2024-06-14 11:30:49,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:49,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:49,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:49,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2024-06-14 11:30:49,456 INFO L420 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:49,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:49,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1775513787, now seen corresponding path program 30 times [2024-06-14 11:30:49,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:49,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789309786] [2024-06-14 11:30:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:49,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:49,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:49,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789309786] [2024-06-14 11:30:49,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789309786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:49,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:49,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:30:49,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277769033] [2024-06-14 11:30:49,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:49,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:30:49,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:30:49,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:30:49,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:30:49,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 429 transitions, 4768 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:49,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:49,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:30:49,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:51,028 INFO L124 PetriNetUnfolderBase]: 3938/6643 cut-off events. [2024-06-14 11:30:51,029 INFO L125 PetriNetUnfolderBase]: For 1629883/1629894 co-relation queries the response was YES. [2024-06-14 11:30:51,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56554 conditions, 6643 events. 3938/6643 cut-off events. For 1629883/1629894 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 46818 event pairs, 1321 based on Foata normal form. 35/6678 useless extension candidates. Maximal degree in co-relation 56364. Up to 5894 conditions per place. [2024-06-14 11:30:51,124 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 363 selfloop transitions, 66 changer transitions 24/459 dead transitions. [2024-06-14 11:30:51,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 459 transitions, 5846 flow [2024-06-14 11:30:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:30:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:30:51,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 259 transitions. [2024-06-14 11:30:51,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48592870544090055 [2024-06-14 11:30:51,125 INFO L175 Difference]: Start difference. First operand has 443 places, 429 transitions, 4768 flow. Second operand 13 states and 259 transitions. [2024-06-14 11:30:51,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 459 transitions, 5846 flow [2024-06-14 11:30:57,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 459 transitions, 5644 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-14 11:30:57,809 INFO L231 Difference]: Finished difference. Result has 436 places, 422 transitions, 4597 flow [2024-06-14 11:30:57,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4566, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4597, PETRI_PLACES=436, PETRI_TRANSITIONS=422} [2024-06-14 11:30:57,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-14 11:30:57,810 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 422 transitions, 4597 flow [2024-06-14 11:30:57,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:57,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:57,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:57,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2024-06-14 11:30:57,810 INFO L420 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:30:57,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:57,810 INFO L85 PathProgramCache]: Analyzing trace with hash -335212877, now seen corresponding path program 31 times [2024-06-14 11:30:57,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:57,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961453638] [2024-06-14 11:30:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:57,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:57,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:57,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961453638] [2024-06-14 11:30:57,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961453638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:57,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:57,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:30:57,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790598853] [2024-06-14 11:30:57,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:57,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:30:57,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:57,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:30:57,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:30:58,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:30:58,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 422 transitions, 4597 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:58,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:58,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:30:58,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:59,443 INFO L124 PetriNetUnfolderBase]: 4218/7114 cut-off events. [2024-06-14 11:30:59,443 INFO L125 PetriNetUnfolderBase]: For 2190223/2190233 co-relation queries the response was YES. [2024-06-14 11:30:59,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67370 conditions, 7114 events. 4218/7114 cut-off events. For 2190223/2190233 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 51089 event pairs, 1558 based on Foata normal form. 34/7147 useless extension candidates. Maximal degree in co-relation 67183. Up to 5354 conditions per place. [2024-06-14 11:30:59,540 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 138 changer transitions 19/458 dead transitions. [2024-06-14 11:30:59,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 458 transitions, 6003 flow [2024-06-14 11:30:59,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:30:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:30:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-14 11:30:59,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-14 11:30:59,541 INFO L175 Difference]: Start difference. First operand has 436 places, 422 transitions, 4597 flow. Second operand 9 states and 206 transitions. [2024-06-14 11:30:59,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 458 transitions, 6003 flow [2024-06-14 11:31:06,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 458 transitions, 5835 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-14 11:31:06,899 INFO L231 Difference]: Finished difference. Result has 424 places, 418 transitions, 4654 flow [2024-06-14 11:31:06,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4431, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4654, PETRI_PLACES=424, PETRI_TRANSITIONS=418} [2024-06-14 11:31:06,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-14 11:31:06,900 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 418 transitions, 4654 flow [2024-06-14 11:31:06,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:06,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:06,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:06,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2024-06-14 11:31:06,900 INFO L420 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:06,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:06,901 INFO L85 PathProgramCache]: Analyzing trace with hash 678975783, now seen corresponding path program 1 times [2024-06-14 11:31:06,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:06,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103524323] [2024-06-14 11:31:06,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:06,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:07,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:07,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103524323] [2024-06-14 11:31:07,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103524323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:07,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:07,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:31:07,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749871732] [2024-06-14 11:31:07,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:07,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:31:07,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:07,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:31:07,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:31:07,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:31:07,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 418 transitions, 4654 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:07,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:07,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:31:07,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:08,613 INFO L124 PetriNetUnfolderBase]: 4249/7188 cut-off events. [2024-06-14 11:31:08,613 INFO L125 PetriNetUnfolderBase]: For 2399057/2399066 co-relation queries the response was YES. [2024-06-14 11:31:08,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71183 conditions, 7188 events. 4249/7188 cut-off events. For 2399057/2399066 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 51847 event pairs, 1606 based on Foata normal form. 33/7221 useless extension candidates. Maximal degree in co-relation 70997. Up to 5772 conditions per place. [2024-06-14 11:31:08,717 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 296 selfloop transitions, 140 changer transitions 21/463 dead transitions. [2024-06-14 11:31:08,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 463 transitions, 6092 flow [2024-06-14 11:31:08,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:31:08,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:31:08,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 265 transitions. [2024-06-14 11:31:08,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386178861788617 [2024-06-14 11:31:08,718 INFO L175 Difference]: Start difference. First operand has 424 places, 418 transitions, 4654 flow. Second operand 12 states and 265 transitions. [2024-06-14 11:31:08,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 463 transitions, 6092 flow [2024-06-14 11:31:15,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 463 transitions, 5832 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 11:31:15,491 INFO L231 Difference]: Finished difference. Result has 425 places, 412 transitions, 4591 flow [2024-06-14 11:31:15,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4398, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4591, PETRI_PLACES=425, PETRI_TRANSITIONS=412} [2024-06-14 11:31:15,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-14 11:31:15,491 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 412 transitions, 4591 flow [2024-06-14 11:31:15,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:15,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:15,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:15,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2024-06-14 11:31:15,492 INFO L420 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:15,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash -69183215, now seen corresponding path program 2 times [2024-06-14 11:31:15,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:15,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808349494] [2024-06-14 11:31:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:15,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:15,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:15,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808349494] [2024-06-14 11:31:15,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808349494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:15,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:15,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:31:15,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894343287] [2024-06-14 11:31:15,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:15,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:31:15,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:15,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:31:15,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:31:15,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:31:15,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 412 transitions, 4591 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:15,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:15,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:31:15,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:17,102 INFO L124 PetriNetUnfolderBase]: 4151/7021 cut-off events. [2024-06-14 11:31:17,102 INFO L125 PetriNetUnfolderBase]: For 2377718/2377718 co-relation queries the response was YES. [2024-06-14 11:31:17,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70109 conditions, 7021 events. 4151/7021 cut-off events. For 2377718/2377718 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 50610 event pairs, 1649 based on Foata normal form. 26/7046 useless extension candidates. Maximal degree in co-relation 69924. Up to 6167 conditions per place. [2024-06-14 11:31:17,380 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 284 selfloop transitions, 132 changer transitions 12/434 dead transitions. [2024-06-14 11:31:17,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 434 transitions, 5559 flow [2024-06-14 11:31:17,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:31:17,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:31:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 11:31:17,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 11:31:17,381 INFO L175 Difference]: Start difference. First operand has 425 places, 412 transitions, 4591 flow. Second operand 9 states and 195 transitions. [2024-06-14 11:31:17,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 434 transitions, 5559 flow [2024-06-14 11:31:24,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 434 transitions, 5307 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 11:31:24,125 INFO L231 Difference]: Finished difference. Result has 420 places, 408 transitions, 4577 flow [2024-06-14 11:31:24,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4339, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4577, PETRI_PLACES=420, PETRI_TRANSITIONS=408} [2024-06-14 11:31:24,125 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-14 11:31:24,126 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 408 transitions, 4577 flow [2024-06-14 11:31:24,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:24,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:24,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:24,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2024-06-14 11:31:24,126 INFO L420 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:24,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:24,126 INFO L85 PathProgramCache]: Analyzing trace with hash -69331085, now seen corresponding path program 3 times [2024-06-14 11:31:24,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:24,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531708831] [2024-06-14 11:31:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:24,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:24,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:24,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531708831] [2024-06-14 11:31:24,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531708831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:24,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:24,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:31:24,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783648964] [2024-06-14 11:31:24,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:24,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:31:24,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:24,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:31:24,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:31:24,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:31:24,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 408 transitions, 4577 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:24,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:24,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:31:24,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:25,935 INFO L124 PetriNetUnfolderBase]: 4136/6998 cut-off events. [2024-06-14 11:31:25,936 INFO L125 PetriNetUnfolderBase]: For 2324017/2324017 co-relation queries the response was YES. [2024-06-14 11:31:25,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69734 conditions, 6998 events. 4136/6998 cut-off events. For 2324017/2324017 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 50443 event pairs, 1601 based on Foata normal form. 24/7021 useless extension candidates. Maximal degree in co-relation 69550. Up to 6119 conditions per place. [2024-06-14 11:31:26,021 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 128 changer transitions 21/434 dead transitions. [2024-06-14 11:31:26,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 434 transitions, 5593 flow [2024-06-14 11:31:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:31:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:31:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 11:31:26,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-14 11:31:26,022 INFO L175 Difference]: Start difference. First operand has 420 places, 408 transitions, 4577 flow. Second operand 9 states and 196 transitions. [2024-06-14 11:31:26,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 434 transitions, 5593 flow [2024-06-14 11:31:32,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 434 transitions, 5325 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:31:32,065 INFO L231 Difference]: Finished difference. Result has 418 places, 403 transitions, 4512 flow [2024-06-14 11:31:32,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4309, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4512, PETRI_PLACES=418, PETRI_TRANSITIONS=403} [2024-06-14 11:31:32,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-14 11:31:32,065 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 403 transitions, 4512 flow [2024-06-14 11:31:32,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:32,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:32,065 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, 1, 1] [2024-06-14 11:31:32,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2024-06-14 11:31:32,066 INFO L420 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:32,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:32,066 INFO L85 PathProgramCache]: Analyzing trace with hash -185713255, now seen corresponding path program 4 times [2024-06-14 11:31:32,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:32,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638536664] [2024-06-14 11:31:32,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:32,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:32,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:32,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638536664] [2024-06-14 11:31:32,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638536664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:32,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:32,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:31:32,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552583364] [2024-06-14 11:31:32,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:32,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:31:32,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:32,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:31:32,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:31:32,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:31:32,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 403 transitions, 4512 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:32,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:32,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:31:32,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:33,806 INFO L124 PetriNetUnfolderBase]: 4107/6934 cut-off events. [2024-06-14 11:31:33,806 INFO L125 PetriNetUnfolderBase]: For 2306968/2306972 co-relation queries the response was YES. [2024-06-14 11:31:33,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69199 conditions, 6934 events. 4107/6934 cut-off events. For 2306968/2306972 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 49782 event pairs, 1618 based on Foata normal form. 30/6964 useless extension candidates. Maximal degree in co-relation 69016. Up to 6248 conditions per place. [2024-06-14 11:31:33,890 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 354 selfloop transitions, 50 changer transitions 12/422 dead transitions. [2024-06-14 11:31:33,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 422 transitions, 5448 flow [2024-06-14 11:31:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:31:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:31:33,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 11:31:33,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:31:33,890 INFO L175 Difference]: Start difference. First operand has 418 places, 403 transitions, 4512 flow. Second operand 9 states and 189 transitions. [2024-06-14 11:31:33,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 422 transitions, 5448 flow [2024-06-14 11:31:40,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 422 transitions, 5182 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:31:40,577 INFO L231 Difference]: Finished difference. Result has 413 places, 399 transitions, 4306 flow [2024-06-14 11:31:40,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4246, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4306, PETRI_PLACES=413, PETRI_TRANSITIONS=399} [2024-06-14 11:31:40,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-14 11:31:40,577 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 399 transitions, 4306 flow [2024-06-14 11:31:40,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:40,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:40,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:40,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2024-06-14 11:31:40,578 INFO L420 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:40,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:40,578 INFO L85 PathProgramCache]: Analyzing trace with hash -821629913, now seen corresponding path program 5 times [2024-06-14 11:31:40,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:40,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840149513] [2024-06-14 11:31:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:40,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:40,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:40,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840149513] [2024-06-14 11:31:40,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840149513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:40,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:40,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:31:40,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723035652] [2024-06-14 11:31:40,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:40,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:31:40,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:40,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:31:40,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:31:40,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:31:40,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 399 transitions, 4306 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:40,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:40,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:31:40,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:42,268 INFO L124 PetriNetUnfolderBase]: 3973/6718 cut-off events. [2024-06-14 11:31:42,268 INFO L125 PetriNetUnfolderBase]: For 2038619/2038623 co-relation queries the response was YES. [2024-06-14 11:31:42,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64060 conditions, 6718 events. 3973/6718 cut-off events. For 2038619/2038623 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 48058 event pairs, 1541 based on Foata normal form. 30/6748 useless extension candidates. Maximal degree in co-relation 63879. Up to 6037 conditions per place. [2024-06-14 11:31:42,345 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 354 selfloop transitions, 47 changer transitions 12/419 dead transitions. [2024-06-14 11:31:42,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 419 transitions, 5238 flow [2024-06-14 11:31:42,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:31:42,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:31:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 11:31:42,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951219512195122 [2024-06-14 11:31:42,346 INFO L175 Difference]: Start difference. First operand has 413 places, 399 transitions, 4306 flow. Second operand 10 states and 203 transitions. [2024-06-14 11:31:42,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 419 transitions, 5238 flow [2024-06-14 11:31:47,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 419 transitions, 5130 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 11:31:47,241 INFO L231 Difference]: Finished difference. Result has 413 places, 395 transitions, 4254 flow [2024-06-14 11:31:47,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4198, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4254, PETRI_PLACES=413, PETRI_TRANSITIONS=395} [2024-06-14 11:31:47,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-14 11:31:47,241 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 395 transitions, 4254 flow [2024-06-14 11:31:47,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:47,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:47,242 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, 1, 1, 1] [2024-06-14 11:31:47,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2024-06-14 11:31:47,242 INFO L420 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:47,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:47,242 INFO L85 PathProgramCache]: Analyzing trace with hash 767689413, now seen corresponding path program 6 times [2024-06-14 11:31:47,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:47,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327252263] [2024-06-14 11:31:47,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:47,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:47,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:47,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327252263] [2024-06-14 11:31:47,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327252263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:47,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:47,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:31:47,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782577987] [2024-06-14 11:31:47,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:47,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:31:47,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:47,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:31:47,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:31:47,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:31:47,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 395 transitions, 4254 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:47,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:47,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:31:47,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:48,787 INFO L124 PetriNetUnfolderBase]: 3966/6719 cut-off events. [2024-06-14 11:31:48,787 INFO L125 PetriNetUnfolderBase]: For 2035422/2035426 co-relation queries the response was YES. [2024-06-14 11:31:48,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63996 conditions, 6719 events. 3966/6719 cut-off events. For 2035422/2035426 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 48038 event pairs, 1551 based on Foata normal form. 30/6749 useless extension candidates. Maximal degree in co-relation 63815. Up to 5896 conditions per place. [2024-06-14 11:31:48,884 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 126 changer transitions 12/423 dead transitions. [2024-06-14 11:31:48,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 423 transitions, 5214 flow [2024-06-14 11:31:48,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:31:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:31:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-06-14 11:31:48,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508130081300813 [2024-06-14 11:31:48,885 INFO L175 Difference]: Start difference. First operand has 413 places, 395 transitions, 4254 flow. Second operand 12 states and 250 transitions. [2024-06-14 11:31:48,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 423 transitions, 5214 flow [2024-06-14 11:31:54,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 423 transitions, 5112 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 11:31:54,279 INFO L231 Difference]: Finished difference. Result has 413 places, 391 transitions, 4378 flow [2024-06-14 11:31:54,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4378, PETRI_PLACES=413, PETRI_TRANSITIONS=391} [2024-06-14 11:31:54,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-14 11:31:54,279 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 391 transitions, 4378 flow [2024-06-14 11:31:54,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:54,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:54,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:54,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2024-06-14 11:31:54,280 INFO L420 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:31:54,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:54,280 INFO L85 PathProgramCache]: Analyzing trace with hash 767541543, now seen corresponding path program 7 times [2024-06-14 11:31:54,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:54,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614890425] [2024-06-14 11:31:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:54,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:54,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:54,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614890425] [2024-06-14 11:31:54,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614890425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:54,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:54,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:31:54,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105856447] [2024-06-14 11:31:54,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:54,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:31:54,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:54,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:31:54,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:31:54,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:31:54,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 391 transitions, 4378 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:54,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:54,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:31:54,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:55,810 INFO L124 PetriNetUnfolderBase]: 3951/6700 cut-off events. [2024-06-14 11:31:55,810 INFO L125 PetriNetUnfolderBase]: For 2016663/2016667 co-relation queries the response was YES. [2024-06-14 11:31:55,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64012 conditions, 6700 events. 3951/6700 cut-off events. For 2016663/2016667 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 48014 event pairs, 1505 based on Foata normal form. 28/6728 useless extension candidates. Maximal degree in co-relation 63832. Up to 5848 conditions per place. [2024-06-14 11:31:55,905 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 274 selfloop transitions, 120 changer transitions 23/423 dead transitions. [2024-06-14 11:31:55,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 423 transitions, 5386 flow [2024-06-14 11:31:55,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:31:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:31:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-14 11:31:55,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101626016260162 [2024-06-14 11:31:55,906 INFO L175 Difference]: Start difference. First operand has 413 places, 391 transitions, 4378 flow. Second operand 12 states and 251 transitions. [2024-06-14 11:31:55,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 423 transitions, 5386 flow [2024-06-14 11:32:01,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 423 transitions, 5130 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 11:32:01,441 INFO L231 Difference]: Finished difference. Result has 411 places, 384 transitions, 4285 flow [2024-06-14 11:32:01,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4122, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4285, PETRI_PLACES=411, PETRI_TRANSITIONS=384} [2024-06-14 11:32:01,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-14 11:32:01,441 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 384 transitions, 4285 flow [2024-06-14 11:32:01,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:01,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:01,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:01,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2024-06-14 11:32:01,442 INFO L420 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:01,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:01,442 INFO L85 PathProgramCache]: Analyzing trace with hash -790272111, now seen corresponding path program 8 times [2024-06-14 11:32:01,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:01,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886128995] [2024-06-14 11:32:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:01,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:01,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:01,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886128995] [2024-06-14 11:32:01,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886128995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:01,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:01,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:32:01,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530484349] [2024-06-14 11:32:01,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:01,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:32:01,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:01,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:32:01,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:32:01,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:32:01,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 384 transitions, 4285 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:01,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:01,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:32:01,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:02,900 INFO L124 PetriNetUnfolderBase]: 3794/6413 cut-off events. [2024-06-14 11:32:02,900 INFO L125 PetriNetUnfolderBase]: For 1806239/1806243 co-relation queries the response was YES. [2024-06-14 11:32:02,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59363 conditions, 6413 events. 3794/6413 cut-off events. For 1806239/1806243 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 45550 event pairs, 1411 based on Foata normal form. 28/6441 useless extension candidates. Maximal degree in co-relation 59184. Up to 5723 conditions per place. [2024-06-14 11:32:02,988 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 341 selfloop transitions, 43 changer transitions 17/407 dead transitions. [2024-06-14 11:32:02,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 407 transitions, 5239 flow [2024-06-14 11:32:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:32:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:32:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 11:32:02,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 11:32:02,989 INFO L175 Difference]: Start difference. First operand has 411 places, 384 transitions, 4285 flow. Second operand 9 states and 189 transitions. [2024-06-14 11:32:02,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 407 transitions, 5239 flow [2024-06-14 11:32:08,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 407 transitions, 4985 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-14 11:32:08,904 INFO L231 Difference]: Finished difference. Result has 403 places, 380 transitions, 4060 flow [2024-06-14 11:32:08,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4031, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4060, PETRI_PLACES=403, PETRI_TRANSITIONS=380} [2024-06-14 11:32:08,904 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-14 11:32:08,904 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 380 transitions, 4060 flow [2024-06-14 11:32:08,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:08,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:08,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:08,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2024-06-14 11:32:08,904 INFO L420 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:08,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:08,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1677192059, now seen corresponding path program 9 times [2024-06-14 11:32:08,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:08,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608712167] [2024-06-14 11:32:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:08,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:09,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:09,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608712167] [2024-06-14 11:32:09,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608712167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:09,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:09,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:32:09,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305185263] [2024-06-14 11:32:09,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:09,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:32:09,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:09,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:32:09,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:32:09,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:32:09,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 380 transitions, 4060 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:09,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:09,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:32:09,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:10,515 INFO L124 PetriNetUnfolderBase]: 3976/6755 cut-off events. [2024-06-14 11:32:10,515 INFO L125 PetriNetUnfolderBase]: For 1884056/1884060 co-relation queries the response was YES. [2024-06-14 11:32:10,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63072 conditions, 6755 events. 3976/6755 cut-off events. For 1884056/1884060 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 48395 event pairs, 1268 based on Foata normal form. 22/6777 useless extension candidates. Maximal degree in co-relation 62895. Up to 4352 conditions per place. [2024-06-14 11:32:10,593 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 271 selfloop transitions, 138 changer transitions 17/432 dead transitions. [2024-06-14 11:32:10,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 432 transitions, 5739 flow [2024-06-14 11:32:10,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:32:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:32:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 265 transitions. [2024-06-14 11:32:10,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386178861788617 [2024-06-14 11:32:10,594 INFO L175 Difference]: Start difference. First operand has 403 places, 380 transitions, 4060 flow. Second operand 12 states and 265 transitions. [2024-06-14 11:32:10,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 432 transitions, 5739 flow [2024-06-14 11:32:16,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 432 transitions, 5633 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 11:32:16,870 INFO L231 Difference]: Finished difference. Result has 404 places, 378 transitions, 4232 flow [2024-06-14 11:32:16,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3958, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4232, PETRI_PLACES=404, PETRI_TRANSITIONS=378} [2024-06-14 11:32:16,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-14 11:32:16,870 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 378 transitions, 4232 flow [2024-06-14 11:32:16,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:16,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:16,870 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, 1, 1] [2024-06-14 11:32:16,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2024-06-14 11:32:16,870 INFO L420 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:16,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:16,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1667937629, now seen corresponding path program 10 times [2024-06-14 11:32:16,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:16,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219525963] [2024-06-14 11:32:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:16,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:17,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:17,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219525963] [2024-06-14 11:32:17,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219525963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:17,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:17,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:32:17,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732317217] [2024-06-14 11:32:17,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:17,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:32:17,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:17,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:32:17,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:32:17,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:32:17,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 378 transitions, 4232 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:17,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:17,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:32:17,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:18,626 INFO L124 PetriNetUnfolderBase]: 3976/6757 cut-off events. [2024-06-14 11:32:18,626 INFO L125 PetriNetUnfolderBase]: For 2015530/2015534 co-relation queries the response was YES. [2024-06-14 11:32:18,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65718 conditions, 6757 events. 3976/6757 cut-off events. For 2015530/2015534 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 48452 event pairs, 1340 based on Foata normal form. 22/6779 useless extension candidates. Maximal degree in co-relation 65540. Up to 4352 conditions per place. [2024-06-14 11:32:18,704 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 130 changer transitions 8/424 dead transitions. [2024-06-14 11:32:18,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 424 transitions, 5848 flow [2024-06-14 11:32:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:32:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:32:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-14 11:32:18,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532520325203252 [2024-06-14 11:32:18,705 INFO L175 Difference]: Start difference. First operand has 404 places, 378 transitions, 4232 flow. Second operand 12 states and 262 transitions. [2024-06-14 11:32:18,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 424 transitions, 5848 flow [2024-06-14 11:32:24,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 424 transitions, 5562 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-14 11:32:24,591 INFO L231 Difference]: Finished difference. Result has 404 places, 377 transitions, 4208 flow [2024-06-14 11:32:24,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3950, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4208, PETRI_PLACES=404, PETRI_TRANSITIONS=377} [2024-06-14 11:32:24,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-14 11:32:24,592 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 377 transitions, 4208 flow [2024-06-14 11:32:24,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:24,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:24,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:24,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2024-06-14 11:32:24,593 INFO L420 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:24,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:24,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1667926469, now seen corresponding path program 11 times [2024-06-14 11:32:24,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:24,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471428690] [2024-06-14 11:32:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:24,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:24,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:24,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471428690] [2024-06-14 11:32:24,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471428690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:24,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:24,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:32:24,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163339915] [2024-06-14 11:32:24,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:24,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:32:24,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:24,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:32:24,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:32:24,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:32:24,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 377 transitions, 4208 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:24,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:24,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:32:24,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:26,264 INFO L124 PetriNetUnfolderBase]: 3871/6574 cut-off events. [2024-06-14 11:32:26,265 INFO L125 PetriNetUnfolderBase]: For 1882146/1882150 co-relation queries the response was YES. [2024-06-14 11:32:26,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62697 conditions, 6574 events. 3871/6574 cut-off events. For 1882146/1882150 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 46861 event pairs, 1328 based on Foata normal form. 22/6596 useless extension candidates. Maximal degree in co-relation 62520. Up to 4352 conditions per place. [2024-06-14 11:32:26,456 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 126 changer transitions 12/417 dead transitions. [2024-06-14 11:32:26,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 417 transitions, 5504 flow [2024-06-14 11:32:26,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:32:26,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:32:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-14 11:32:26,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223577235772358 [2024-06-14 11:32:26,458 INFO L175 Difference]: Start difference. First operand has 404 places, 377 transitions, 4208 flow. Second operand 12 states and 257 transitions. [2024-06-14 11:32:26,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 417 transitions, 5504 flow [2024-06-14 11:32:31,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 417 transitions, 5238 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-14 11:32:31,171 INFO L231 Difference]: Finished difference. Result has 404 places, 371 transitions, 4121 flow [2024-06-14 11:32:31,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3944, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4121, PETRI_PLACES=404, PETRI_TRANSITIONS=371} [2024-06-14 11:32:31,172 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-14 11:32:31,172 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 371 transitions, 4121 flow [2024-06-14 11:32:31,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:31,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:31,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:31,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2024-06-14 11:32:31,172 INFO L420 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:31,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:31,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1081986811, now seen corresponding path program 12 times [2024-06-14 11:32:31,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:31,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354821013] [2024-06-14 11:32:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:31,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:31,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:31,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354821013] [2024-06-14 11:32:31,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354821013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:31,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:31,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:32:31,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106162882] [2024-06-14 11:32:31,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:31,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:32:31,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:31,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:32:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:32:31,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:32:31,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 371 transitions, 4121 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:31,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:31,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:32:31,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:33,004 INFO L124 PetriNetUnfolderBase]: 3851/6522 cut-off events. [2024-06-14 11:32:33,005 INFO L125 PetriNetUnfolderBase]: For 1939122/1939126 co-relation queries the response was YES. [2024-06-14 11:32:33,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62531 conditions, 6522 events. 3851/6522 cut-off events. For 1939122/1939126 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 46732 event pairs, 1537 based on Foata normal form. 30/6552 useless extension candidates. Maximal degree in co-relation 62355. Up to 5750 conditions per place. [2024-06-14 11:32:33,080 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 265 selfloop transitions, 115 changer transitions 12/398 dead transitions. [2024-06-14 11:32:33,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 398 transitions, 5027 flow [2024-06-14 11:32:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:32:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:32:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 281 transitions. [2024-06-14 11:32:33,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895470383275261 [2024-06-14 11:32:33,081 INFO L175 Difference]: Start difference. First operand has 404 places, 371 transitions, 4121 flow. Second operand 14 states and 281 transitions. [2024-06-14 11:32:33,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 398 transitions, 5027 flow [2024-06-14 11:32:37,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 398 transitions, 4746 flow, removed 2 selfloop flow, removed 15 redundant places. [2024-06-14 11:32:37,797 INFO L231 Difference]: Finished difference. Result has 401 places, 367 transitions, 4044 flow [2024-06-14 11:32:37,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3840, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4044, PETRI_PLACES=401, PETRI_TRANSITIONS=367} [2024-06-14 11:32:37,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-14 11:32:37,797 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 367 transitions, 4044 flow [2024-06-14 11:32:37,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:37,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:37,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:37,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2024-06-14 11:32:37,798 INFO L420 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:37,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:37,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1082196061, now seen corresponding path program 13 times [2024-06-14 11:32:37,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:37,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303667677] [2024-06-14 11:32:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:37,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:37,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:37,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303667677] [2024-06-14 11:32:37,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303667677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:37,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:37,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:32:37,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399051973] [2024-06-14 11:32:37,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:37,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:32:37,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:37,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:32:37,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:32:37,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:32:37,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 367 transitions, 4044 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:37,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:37,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:32:37,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:39,566 INFO L124 PetriNetUnfolderBase]: 3963/6732 cut-off events. [2024-06-14 11:32:39,566 INFO L125 PetriNetUnfolderBase]: For 2110642/2110646 co-relation queries the response was YES. [2024-06-14 11:32:39,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66475 conditions, 6732 events. 3963/6732 cut-off events. For 2110642/2110646 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 48669 event pairs, 1576 based on Foata normal form. 28/6760 useless extension candidates. Maximal degree in co-relation 66301. Up to 5664 conditions per place. [2024-06-14 11:32:39,655 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 271 selfloop transitions, 113 changer transitions 11/401 dead transitions. [2024-06-14 11:32:39,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 401 transitions, 5274 flow [2024-06-14 11:32:39,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 11:32:39,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 11:32:39,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 286 transitions. [2024-06-14 11:32:39,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-14 11:32:39,656 INFO L175 Difference]: Start difference. First operand has 401 places, 367 transitions, 4044 flow. Second operand 14 states and 286 transitions. [2024-06-14 11:32:39,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 401 transitions, 5274 flow [2024-06-14 11:32:45,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 401 transitions, 5036 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-14 11:32:45,821 INFO L231 Difference]: Finished difference. Result has 399 places, 363 transitions, 3991 flow [2024-06-14 11:32:45,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3991, PETRI_PLACES=399, PETRI_TRANSITIONS=363} [2024-06-14 11:32:45,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-14 11:32:45,821 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 363 transitions, 3991 flow [2024-06-14 11:32:45,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:45,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:45,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:45,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2024-06-14 11:32:45,824 INFO L420 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:45,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:45,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1071262051, now seen corresponding path program 14 times [2024-06-14 11:32:45,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:45,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112788393] [2024-06-14 11:32:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:45,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:45,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:45,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112788393] [2024-06-14 11:32:45,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112788393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:45,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:45,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:32:45,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134256902] [2024-06-14 11:32:45,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:45,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:32:45,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:45,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:32:45,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:32:46,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:32:46,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 363 transitions, 3991 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:46,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:46,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:32:46,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:47,427 INFO L124 PetriNetUnfolderBase]: 3811/6470 cut-off events. [2024-06-14 11:32:47,428 INFO L125 PetriNetUnfolderBase]: For 1906881/1906885 co-relation queries the response was YES. [2024-06-14 11:32:47,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61706 conditions, 6470 events. 3811/6470 cut-off events. For 1906881/1906885 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 46376 event pairs, 1543 based on Foata normal form. 30/6500 useless extension candidates. Maximal degree in co-relation 61533. Up to 5696 conditions per place. [2024-06-14 11:32:47,637 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 263 selfloop transitions, 108 changer transitions 12/389 dead transitions. [2024-06-14 11:32:47,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 389 transitions, 4877 flow [2024-06-14 11:32:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:32:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:32:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 263 transitions. [2024-06-14 11:32:47,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49343339587242024 [2024-06-14 11:32:47,639 INFO L175 Difference]: Start difference. First operand has 399 places, 363 transitions, 3991 flow. Second operand 13 states and 263 transitions. [2024-06-14 11:32:47,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 389 transitions, 4877 flow [2024-06-14 11:32:52,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 389 transitions, 4642 flow, removed 1 selfloop flow, removed 15 redundant places. [2024-06-14 11:32:52,710 INFO L231 Difference]: Finished difference. Result has 396 places, 359 transitions, 3946 flow [2024-06-14 11:32:52,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3756, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3946, PETRI_PLACES=396, PETRI_TRANSITIONS=359} [2024-06-14 11:32:52,711 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-14 11:32:52,711 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 359 transitions, 3946 flow [2024-06-14 11:32:52,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:52,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:52,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:52,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2024-06-14 11:32:52,712 INFO L420 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:52,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1071114181, now seen corresponding path program 15 times [2024-06-14 11:32:52,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:52,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615447742] [2024-06-14 11:32:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:52,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:52,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:52,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615447742] [2024-06-14 11:32:52,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615447742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:52,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:52,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:32:52,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481154681] [2024-06-14 11:32:52,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:52,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:32:52,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:52,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:32:52,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:32:52,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:32:52,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 359 transitions, 3946 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:52,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:52,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:32:52,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:54,313 INFO L124 PetriNetUnfolderBase]: 3796/6447 cut-off events. [2024-06-14 11:32:54,313 INFO L125 PetriNetUnfolderBase]: For 1889584/1889588 co-relation queries the response was YES. [2024-06-14 11:32:54,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61522 conditions, 6447 events. 3796/6447 cut-off events. For 1889584/1889588 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 46160 event pairs, 1495 based on Foata normal form. 28/6475 useless extension candidates. Maximal degree in co-relation 61349. Up to 5648 conditions per place. [2024-06-14 11:32:54,395 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 105 changer transitions 17/389 dead transitions. [2024-06-14 11:32:54,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 389 transitions, 4880 flow [2024-06-14 11:32:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:32:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:32:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 264 transitions. [2024-06-14 11:32:54,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49530956848030017 [2024-06-14 11:32:54,396 INFO L175 Difference]: Start difference. First operand has 396 places, 359 transitions, 3946 flow. Second operand 13 states and 264 transitions. [2024-06-14 11:32:54,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 389 transitions, 4880 flow [2024-06-14 11:32:58,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 389 transitions, 4660 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 11:32:58,974 INFO L231 Difference]: Finished difference. Result has 394 places, 355 transitions, 3898 flow [2024-06-14 11:32:58,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3898, PETRI_PLACES=394, PETRI_TRANSITIONS=355} [2024-06-14 11:32:58,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-14 11:32:58,975 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 355 transitions, 3898 flow [2024-06-14 11:32:58,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:58,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:58,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:58,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2024-06-14 11:32:58,976 INFO L420 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:58,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:58,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1077600931, now seen corresponding path program 16 times [2024-06-14 11:32:58,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:58,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560335331] [2024-06-14 11:32:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:58,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:59,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:59,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560335331] [2024-06-14 11:32:59,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560335331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:59,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:59,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:32:59,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066842673] [2024-06-14 11:32:59,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:59,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:32:59,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:32:59,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:32:59,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:32:59,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 355 transitions, 3898 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:59,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:59,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:32:59,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:00,701 INFO L124 PetriNetUnfolderBase]: 3824/6505 cut-off events. [2024-06-14 11:33:00,701 INFO L125 PetriNetUnfolderBase]: For 1941279/1941283 co-relation queries the response was YES. [2024-06-14 11:33:00,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63583 conditions, 6505 events. 3824/6505 cut-off events. For 1941279/1941283 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 46748 event pairs, 1473 based on Foata normal form. 22/6527 useless extension candidates. Maximal degree in co-relation 63411. Up to 5508 conditions per place. [2024-06-14 11:33:00,774 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 268 selfloop transitions, 109 changer transitions 8/391 dead transitions. [2024-06-14 11:33:00,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 391 transitions, 5120 flow [2024-06-14 11:33:00,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:33:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:33:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 269 transitions. [2024-06-14 11:33:00,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046904315196998 [2024-06-14 11:33:00,775 INFO L175 Difference]: Start difference. First operand has 394 places, 355 transitions, 3898 flow. Second operand 13 states and 269 transitions. [2024-06-14 11:33:00,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 391 transitions, 5120 flow [2024-06-14 11:33:06,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 391 transitions, 4898 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-14 11:33:06,929 INFO L231 Difference]: Finished difference. Result has 391 places, 354 transitions, 3898 flow [2024-06-14 11:33:06,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3682, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3898, PETRI_PLACES=391, PETRI_TRANSITIONS=354} [2024-06-14 11:33:06,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-14 11:33:06,930 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 354 transitions, 3898 flow [2024-06-14 11:33:06,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:06,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:06,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:06,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2024-06-14 11:33:06,930 INFO L420 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:06,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1077612091, now seen corresponding path program 17 times [2024-06-14 11:33:06,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:06,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246486244] [2024-06-14 11:33:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:06,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:07,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:07,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246486244] [2024-06-14 11:33:07,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246486244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:07,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:07,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:33:07,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755081889] [2024-06-14 11:33:07,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:07,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:33:07,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:07,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:33:07,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:33:07,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:07,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 354 transitions, 3898 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:07,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:07,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:07,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15